90 results on '"Schouten, N."'
Search Results
2. Is young age a risk factor for chronic postoperative inguinal pain after endoscopic totally extraperitoneal (TEP) repair?
- Author
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Bakker, W. J., van Hessen, C. V., Verleisdonk, E. J. M. M., Clevers, G. J., Davids, P. H. P., Schouten, N., and Burgmans, J. P. J.
- Published
- 2019
- Full Text
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3. The influence of hospital volume on long-term oncological outcome after rectal cancer surgery
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Jonker, Frederik H. W., Hagemans, Jan A. W., Burger, Jacobus W. A., Verhoef, Cornelis, Borstlap, Wernard A. A., Tanis, Pieter J., Aalbers, A., Acherman, Y., Algie, G. D., Alting von Geusau, B., Amelung, F., Aukema, T. S., Bakker, I. S., Bartels, S. A., Basha, S., Bastiaansen, A. J. N. M., Belgers, E., Bemelman, W. A., Bleeker, W., Blok, J., Bosker, R. J. I., Bosmans, J. W., Boute, M. C., Bouvy, N. D., Bouwman, H., Brandt-Kerkhof, A., Brinkman, D. J., Bruin, S., Bruns, E. R. J., Burbach, J. P. M., Clermonts, S., Coene, P. P. L. O., Compaan, C., Consten, E. C. J., Darbyshire, T., de Mik, S. M. L., de Graaf, E. J. R., de Groot, I., de vos tot Nederveen Cappel, R. J. L., de Wilt, J. H. W., van der Wolde, J., den Boer, F. C., Dekker, J. W. T., Demirkiran, A., Derkx-Hendriksen, M., Dijkstra, F. R., van Duijvendijk, P., Dunker, M. S., Eijsbouts, Q. E., Fabry, H., Ferenschild, F., Foppen, J. W., Furnée, E. J. B., Gerhards, M. F., Gerven, P., Gooszen, J. A. H., Govaert, J. A., Van Grevenstein, W. M. U., Haen, R., Harlaar, J. J., Harst, E., Havenga, K., Heemskerk, J., Heeren, J. F., Heijnen, B., Heres, P., Hoff, C., Hogendoorn, W., Hoogland, P., Huijbers, A., Gooszen, J. A. H., Janssen, P., Jongen, A. C., Karthaus, E. G., Keijzer, A., Ketel, J. M. A., Klaase, J., Kloppenberg, F. W. H., Kool, M. E., Kortekaas, R., Kruyt, P. M., Kuiper, J. T., Lamme, B., Lange, J. F., Lettinga, T., Lips, D. J., Logeman, F., Lutke Holzik, M. F., Madsen, E., Mamound, A., Marres, C. C., Masselink, I., Meerdink, M., Menon, A. G., Mieog, J. S., Mierlo, D., Musters, G. D., Neijenhuis, P. A., Nonner, J., Oostdijk, M., Oosterling, S. J., Paul, P. M. P., Peeters, K. C. M. J. C., Pereboom, I. T. A., Polat, F., Poortman, P., Raber, M., Reiber, B. M. M., Renger, R. J., van Rossem, C. C., Rutten, H. J., Rutten, A., Schaapman, R., Scheer, M., Schoonderwoerd, L., Schouten, N., Schreuder, A. M., Schreurs, W. H., Simkens, G. A., Slooter, G. D., Sluijmer, H. C. E., Smakman, N., Smeenk, R., Snijders, H. S., Sonneveld, D. J. A., Spaansen, B., Spillenaar Bilgen, E. J., Steller, E., Steup, W. H., Steur, C., Stortelder, E., Straatman, J., Swank, H. A., Sietses, C., ten Berge, H. A., ten hoeve, H. G., ter Riele, W. W., Thorensen, I. M., Tip-Pluijm, B., Toorenvliet, B. R., Tseng, L., Tuynman, J. B., van Bastelaar, J., van beek, S. C., van de Ven, A. W. H., van de Weijer, M. A. J., van den Berg, C., van den Bosch, I., van der Bilt, J. D. W., van der Hagen, S. J., van der hul, R., van der Schelling, G., van der Spek, A., van der Wielen, N., van duyn, E., van Eekelen, C., van Essen, J. A., van Gangelt, K., van Geloven, A. A. W., van kessel, C., van Loon, Y. T., van Rijswijk, A., van Rooijen, S. J., van Sprundel, T., van Steensel, L., van Tets, W. F., van Westreenen, H. L., Veltkamp, S., Verhaak, T., Verheijen, P. M., Versluis-Ossenwaarde, L., Vijfhuize, S., Vles, W. J., Voeten, S., Vogelaar, F. J., Vrijland, W. W., Westerduin, E., Westerterp, M. E., Wetzel, M., Wevers, K., Wiering, B., Witjes, A. C., Wouters, M. W., Yauw, S. T. K., Zeestraten, E. C., Zimmerman, D. D., Zwieten, T., and Dutch Snapshot Research Group
- Published
- 2017
- Full Text
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4. Three-month results of the effect of Ultrapro or Prolene mesh on post-operative pain and well-being following endoscopic totally extraperitoneal hernia repair (TULP trial)
- Author
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Burgmans, J. P. J., Voorbrood, C. E. H., Schouten, N., Smakman, N., Elias, S., Clevers, G. J., Davids, P. H. P., Verleisdonk, E. J. M. M., Hamaker, M. E., Simmermacher, R. K. J., and van Dalen, T.
- Published
- 2015
- Full Text
- View/download PDF
5. Pain after totally extraperitoneal (TEP) hernia repair might fade out within a year
- Author
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Burgmans, J. P. J., Schouten, N., Clevers, G. J., Verleisdonk, E. J. M. M., Davids, P. H. P., Voorbrood, C. E. H., Simmermacher, R. K. J., and Van Dalen, T.
- Published
- 2015
- Full Text
- View/download PDF
6. One-stop endoscopic hernia surgery: efficient and satisfactory
- Author
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Voorbrood, C. E. H., Burgmans, J. P. J., Clevers, G. J., Davids, P. H. P., Verleisdonk, E. J. M. M., Schouten, N., and van Dalen, T.
- Published
- 2015
- Full Text
- View/download PDF
7. Inguinal Hernia: Crossfire Between the Meshes
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Teoh, A., Chan, K., Chiu, P., Leong, H., Ng, E., Protasov, A. V., Titarov, D. L., Shemyatovsky, K. A., Origi, M., Moroni, M. R., Veronesi, P., Militello, P., Branchini, L., Frattolillo, F., Varale, R., Pappalardo, V., Zuliani, W., Burgmans, I., Voorbrood, C., Schouten, N., Clevers, G. J., Davids, P. H. P., Verleisdonk, E. J. M. M., Simmermacher, R. K. J., Miyazaki, K., Porrero-Carro, J. L., García-Pastor, P., Hidalgo-Pascual, M., Gutierrez-Romero, R., Picazo-Yeste, J., Jenkin, A., Perera, M., Presley, R., Amato, G., Romano, G., Agrusa, A., Di Buono, G., Cocorullo, G., Gulotta, G., Fang, Z. X., Ren, F., Zhou, J. P., Liu, D. C., Tian, J., Ungpinitpong, W., Morfesis, F., Rose, B., Kishimoto, T., Okada, Y., Hayashi, E., Nagata, J., Ohira, S., Horio, K., Ishida, Y., Takahashi, R., Kanie, Y., Terao, N., Noritake, O., Narui, R., Kubota, H., Lorenz, R., Koch, A., Born, H., Wiese, M., Cejnar, S., Kalhan, S., Bhardwaj, A., Bhatia, P., Khetan, M., John, S., and Bindal, V.
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- 2015
- Full Text
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8. Selecting patients during the “learning curve” of endoscopic Totally Extraperitoneal (TEP) hernia repair
- Author
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Schouten, N., Elshof, J. W. M., Simmermacher, R. K. J., van Dalen, T., de Meer, S. G. A., Clevers, G. J., Davids, P. H. P., Verleisdonk, E. J. M. M., Westers, P., and Burgmans, J. P. J.
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- 2013
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9. Is there an end of the “learning curve” of endoscopic totally extraperitoneal (TEP) hernia repair?
- Author
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Schouten, N., Simmermacher, R. K. J., van Dalen, T., Smakman, N., Clevers, G. J., Davids, P. H. P., Verleisdonk, E. J. M. M., and Burgmans, J. P. J.
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- 2013
- Full Text
- View/download PDF
10. Female ‘groin’ hernia: totally extraperitoneal (TEP) endoscopic repair seems the most appropriate treatment modality
- Author
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Schouten, N., Burgmans, J. P. J., van Dalen, T., Smakman, N., Clevers, G. J., Davids, P. H. P., Verleisdonk, E. J. M. M., Elias, S. G., and Simmermacher, R. K. J.
- Published
- 2012
- Full Text
- View/download PDF
11. Impairment of sexual activity before and after endoscopic totally extraperitoneal (TEP) hernia repair
- Author
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Schouten, N., van Dalen, T., Smakman, N., Clevers, G. J., Davids, P. H. P., Verleisdonk, E. J. M. M., Tekatli, H., and Burgmans, J. P. J.
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- 2012
- Full Text
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12. Expression of cocoa butter from cocoa nibs
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Venter, M.J., Schouten, N., Hink, R., Kuipers, N.J.M., and de Haan, A.B.
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- 2007
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13. Inadequate Nutritional Intake During The Post-Icu Ward Stay
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Slingerland, R., van der Heijden, I., Schouten, N., Driessen, L., Meijer, S., Mensink, M., and van Zanten, A.
- Published
- 2023
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14. Technique for removing a broken intramedullary nail
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Schouten, N., Verdaasdonk, E. G. G., and Van der Elst, M.
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- 2010
- Full Text
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15. Influence of Conversion and Anastomotic Leakage on Survival in Rectal Cancer Surgery; Retrospective Cross-sectional Study
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Furnee, E.J.B., Aukema, T.S., Oosterling, S.J., Borstlap, W.A.A., Bemelman, W.A., Tanis, P.J., Aalbers, A., Acherman, Y., Algie, G.D., Geusau, B.A. von, Amelung, F., Bartels, S.A., Basha, S., Bastiaansen, A.J.N.M., Belgers, E., Bleeker, W., Blok, J., Bosker, R.J.I., Bosmans, J.W., Boute, M.C., Bouvy, N.D., Bouwman, H., Brandt-Kerkhof, A., Brinkman, D.J., Bruin, S., Bruns, E.R.J., Burbach, J.P.M., Burger, J.W.A., Buskens, C.J., Clermonts, S., Coene, P.P.L.O., Compaan, C., Consten, E.C.J., Darbyshire, T., Mik, S.M.L. de, Graaf, E.J.R. de, Groot, I. de, Cappel, R.J.L.D.N., Wilt, J.H.W. de, Wolde, J. van der, Boer, F.C. den, Dekker, J.W.T., Demirkiran, A., Derkx-Hendriksen, M., Dijkstra, F.R., Duijvendijk, P. van, Dunker, M.S., Eijsbouts, Q.E., Fabry, H., Ferenschild, F., Foppen, J.W., Gerhards, M.F., Gerven, P., Gooszen, J.A.H., Govaert, J.A., Grevenstein, W.M.U. van, Haen, R., Harlaar, J.J., Harst, E., Havenga, K., Heemskerk, J., Heeren, J.F., Heijnen, B., Heres, P., Hoff, C., Hogendoorn, W., Hoogland, P., Huijbers, A., Janssen, P., Jongen, A.C., Jonker, F.H., Karthaus, E.G., Keijzer, A., Ketel, J.M.A., Klaase, J., Kloppenberg, F.W.H., Kool, M.E., Kortekaas, R., Kruyt, P.M., Kuiper, J.T., Lamme, B., Lange, J.F., Lettinga, T., Lips, D.J., Logeman, F., Holzik, M.F.L., Madsen, E., Mamound, A., Marres, C.C., Masselink, I., Meerdink, M., Menon, A.G., Mieog, J.S., Mierlo, D., Musters, G.D., Nieuwenhuijzen, G.A.P., Neijenhuis, P.A., Nonner, J., Oostdijk, M., Paul, P.M.P., Peeters, K.C.M.J., Pereboom, I.T.A., Polat, F., Poortman, P., Raber, M., Reiber, B.M.M., Renger, R.J., Rossem, C.C. van, Rutten, H.J., Rutten, A., Schaapman, R., Scheer, M., Schoonderwoerd, L., Schouten, N., Schreuder, A.M., Schreurs, W.H., Simkens, G.A., Slooter, G.D., Sluijmer, H.C.E., Smakman, N., Smeenk, R., Snijders, H.S., Sonneveld, D.J.A., Spaansen, B., Bilgen, E.J.S., Steller, E., Steup, W.H., Steur, C., Stortelder, E., Straatman, J., Swank, H.A., Sietses, C., Berge, H.A. ten, Hoeve, H.G. ten, Riele, W.W. ter, Thorensen, I.M., Tip-Pluijm, B., Toorenvliet, B.R., Tseng, L., Tuynman, J.B., Bastelaar, J. van, Beek, S.C. van, Ven, A.W.H. van de, Weijer, M.A.J. van de, Berg, C. van den, Bosch, I. van den, Bilt, J.D.W. van der, Hagen, S.J. van der, Hul, R. van der, Schelling, G. van der, Spek, A. van der, Wielen, N. van der, Duyn, E. van, Eekelen, C. van, Essen, J.A. van, Gangelt, K. van, Geloven, A.A.W. van, Kessel, C. van, Loon, Y.T. van, Rijswijk, A. van, Rooijen, S.J. van, Sprundel, T. van, Steensel, L. van, Tets, W.F. van, Westreenen, H.L. van, Veltkamp, S., Verhaak, T., Verheijen, P.M., Versluis-Ossenwaarde, L., Vijfhuize, S., Vles, W.J., Voeten, S., Vogelaar, F.J., Vrijland, W.W., Westerduin, E., Westerterp, M.E., Wetzel, M., Wevers, K.P., Wiering, B., Witjes, C.D.M., Wouters, M.W., Yauw, S.T.K., Zaag, E.S. van der, Zeestraten, E.C., Zimmerman, D.D., Zwieten, T., and Dutch Snapshot Res Grp
- Subjects
Survival ,Anastomosis ,Laparoscopy ,Conversion ,Rectal cancer - Published
- 2019
16. Cross-Sectional Study on MRI Restaging After Chemoradiotherapy and Interval to Surgery in Rectal Cancer: Influence on Short- and Long-Term Outcomes
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Detering, R., Borstlap, W.A.A., Broeders, L., Hermus, L., Marijnen, C.A.M., Beets-Tan, R.G.H., Bemelman, W.A., Westreenen, H.L. van, Tanis, P.J., Aalbers, A., Acherman, Y., Algie, G.D., Geusau, B.A. von, Amelung, F., Bartels, S.A., Basha, S., Bastiaansen, A.J.N.M., Belgers, E., Bleeker, W., Blok, J., Bosker, R.J.I., Bosmans, J.W., Boute, M.C., Bouvy, N.D., Bouwman, H., Brandt-Kerkhof, A., Brinkman, D.J., Bruin, S., Bruns, E.R.J., Burbach, J.P.M., Burger, J.W.A., Buskens, C.J., Clermonts, S., Coene, P.P.L.O., Compaan, C., Consten, E.C.J., Darbyshire, T., Mik, S.M.L. de, Graaf, E.J.R. de, Groot, I. de, Cappel, R.J.L.D.T.N., Wilt, J.H.W. de, Wolde, J. van der, Boer, F.C. den, Dekker, J.W.T., Demirkiran, A., Derkx-Hendriksen, M., Dijkstra, F.R., Duijvendijk, P. van, Dunker, M.S., Eijsbouts, Q.E., Fabry, H., Ferenschild, F., Foppen, J.W., Gerhards, M.F., Gerven, P., Gooszen, J.A.H., Govaert, J.A., Grevenstein, W.M.U. van, Haen, R., Harlaar, J.J., Harst, E., Havenga, K., Heemskerk, J., Heeren, J.F., Heijnen, B., Heres, P., Hoff, C., Hogendoorn, W., Hoogland, P., Huijbers, A., Janssen, P., Jongen, A.C., Jonker, F.H., Karthaus, E.G., Keijzer, A., Ketel, J.M.A., Klaase, J., Wit, F., Kloppenberg, H., Kool, M.E., Kortekaas, R., Kruyt, P.M., Kuiper, J.T., Lamme, B., Lange, J.F., Lettinga, T., Lips, D.J., Logeman, F., Holzik, M.F.L., Madsen, E., Mamound, A., Marres, C.C., Masselink, I., Meerdink, M., Menon, A.G., Mieog, J.S., Mierlo, D., Musters, G.D., Nieuwenhuijzen, G.A.P., Neijenhuis, P.A., Nonner, J., Oostdijk, M., Paul, P.M.P., Peeters, K.C.M.J., Pereboom, I.T.A., Polat, F., Poortman, P., Raber, M., Reiber, B.M.M., Renger, R.J., Rossem, C.C. van, Rutten, H.J., Rutten, A., Schaapman, R., Scheer, M., Schoonderwoerd, L., Schouten, N., Schreuder, A.M., Schreurs, W.H., Simkens, G.A., Slooter, G.D., Sluijmer, H.C.E., Smakman, N., Smeenk, R., Snijders, H.S., Sonneveld, D.J.A., Spaansen, B., Bilgen, E.J.S., Steller, E., Steup, W.H., Steur, C., Stortelder, E., Straatman, J., Swank, H.A., Sietses, C., Berge, H.A. ten, Hoeve, H.G. ten, Riele, W.W. ter, Thorensen, I.M., Tip-Pluijm, B., Toorenvliet, B.R., Tseng, L., Tuynman, J.B., Bastelaar, J. van, Beek, S.C. van, Ven, A.W.H. van de, Weijer, M.A.J. van de, Berg, C. van den, Bosch, I. van den, Bilt, J.D.W. van der, Hagen, S.J. van der, Hul, R. van der, Schelling, G. van der, Spek, A. van der, Wielen, N. van der, Duyn, E. van, Eekelen, C. van, Essen, J.A. van, Gangelt, K. van, Geloven, A.A.W. van, Kessel, C. van, Loon, Y.T. van, Rijswijk, A. van, Rooijen, S.J. van, Sprundel, T. van, Steensel, L. van, Tets, W.F. van, Veltkamp, S., Verhaak, T., Verheijen, P.M., Versluis-Ossenwaarde, L., Vijfhuize, S., Vles, W.J., Voeten, S.C., Vogelaar, F.J., Vrijland, W.W., Westerduin, E., Westerterp, M.E., Wetzel, M., Wevers, K.P., Wiering, B., Witjes, C.D.M., Wouters, M.W., Yauw, S.T.K., Zaag, E.S. van der, Zeestraten, E.C., Zimmerman, D.D., Zwieten, T., Dutch Snapshot Res Grp, Groningen Institute for Organ Transplantation (GIOT), Value, Affordability and Sustainability (VALUE), Robotics and image-guided minimally-invasive surgery (ROBOTICS), CCA - Cancer Treatment and quality of life, Surgery, Amsterdam Reproduction & Development (AR&D), and Amsterdam Gastroenterology Endocrinology Metabolism
- Subjects
Male ,IMPACT ,medicine.medical_treatment ,THERAPY ,Tumours of the digestive tract Radboud Institute for Health Sciences [Radboudumc 14] ,CHEMORADIATION ,0302 clinical medicine ,ADJUVANT CHEMOTHERAPY ,Interquartile range ,Medicine ,PATHOLOGICAL COMPLETE RESPONSE ,Stage (cooking) ,Neoadjuvant therapy ,Netherlands ,Aged, 80 and over ,medicine.diagnostic_test ,Incidence ,ASO Author Reflections ,Chemoradiotherapy ,Middle Aged ,Magnetic Resonance Imaging ,Neoadjuvant Therapy ,Survival Rate ,Treatment Outcome ,Oncology ,030220 oncology & carcinogenesis ,Surgical Procedures, Operative ,SURVIVAL ,030211 gastroenterology & hepatology ,Female ,TIME-INTERVAL ,RADIOTHERAPY ,medicine.medical_specialty ,RESECTION ,Preoperative care ,Time-to-Treatment ,03 medical and health sciences ,Preoperative Care ,Humans ,Survival rate ,Aged ,Neoplasm Staging ,Retrospective Studies ,business.industry ,Rectal Neoplasms ,Magnetic resonance imaging ,Retrospective cohort study ,NEOADJUVANT CHEMORADIOTHERAPY ,Surgery ,Cross-Sectional Studies ,Neoplasm Recurrence, Local ,business ,Follow-Up Studies - Abstract
Contains fulltext : 215772.pdf (Publisher’s version ) (Open Access) BACKGROUND: The time interval between CRT and surgery in rectal cancer patients is still the subject of debate. The aim of this study was to first evaluate the nationwide use of restaging magnetic resonance imaging (MRI) and its impact on timing of surgery, and, second, to evaluate the impact of timing of surgery after chemoradiotherapy (CRT) on short- and long-term outcomes. METHODS: Patients were selected from a collaborative rectal cancer research project including 71 Dutch centres, and were subdivided into two groups according to time interval from the start of preoperative CRT to surgery (< 14 and >/= 14 weeks). RESULTS: From 2095 registered patients, 475 patients received preoperative CRT. MRI restaging was performed in 79.4% of patients, with a median CRT-MRI interval of 10 weeks (interquartile range [IQR] 8-11) and a median MRI-surgery interval of 4 weeks (IQR 2-5). The CRT-surgery interval groups consisted of 224 (< 14 weeks) and 251 patients (>/= 14 weeks), and the long-interval group included a higher proportion of cT4 stage and multivisceral resection patients. Pathological complete response rate (n = 34 [15.2%] vs. n = 47 [18.7%], p = 0.305) and CRM involvement (9.7% vs. 15.9%, p = 0.145) did not significantly differ. Thirty-day surgical complications were similar (20.1% vs. 23.1%, p = 0.943), however no significant differences were found for local and distant recurrence rates, disease-free survival, and overall survival. CONCLUSIONS: These real-life data, reflecting routine daily practice in The Netherlands, showed substantial variability in the use and timing of restaging MRI after preoperative CRT for rectal cancer, as well as time interval to surgery. Surgery before or after 14 weeks from the start of CRT resulted in similar short- and long-term outcomes.
- Published
- 2019
- Full Text
- View/download PDF
17. A0959 - Mapping EAU guideline practice variations across Europe: An audit of ADT before surgery in locally advanced and high-risk prostate cancer in 6315 cases across 31 European countries
- Author
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MacLennan, S., Azevedo, N., Briganti, A., Duncan, E., Dunsmore, J., Fullwood, L., Lumen, N., Plass, K., Ribal, M.J., Roobol, M.J., Schouten, N., Smith, E.J., Skolarus, T.A., and N'Dow, J.M.O.
- Published
- 2022
- Full Text
- View/download PDF
18. Benchmarking recent national practice in rectal cancer treatment with landmark randomized controlled trials
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Borstlap, W.A.A., Deijen, C.L., Dulk, M. den, Bonjer, H.J., Velde, C.J. van de, Bemelman, W.A., Tanis, P.J., Aalbers, A., Acherman, Y., Algie, G.D., Geu-sau, B.A. von, Amelung, F., Aukema, T.S., Bakker, I.S., Bartels, S.A., Basha, S., Bastiaansen, A.J.N.M., Belgers, E., Bleeker, W., Blok, J., Bosker, R.J.I., Bosmans, J.W., Boute, M.C., Bouvy, N.D., Bouwman, H., Brandt-Kerkhof, A., Brinkman, D.J., Bruin, S., Bruns, E.R.J., Burbach, J.P.M., Burger, J.W.A., Buskens, C.J., Clermonts, S., Coene, P.P.L.O., Compaan, C., Consten, E.C.J., Darbyshire, T., Mik, S.M.L. de, Graaf, E.J.R. de, Groot, I. de, Cappel, R.J.L.D.T.N., Wilt, J.H.W. de, Wolde, J. van der, Boer, F.C. den, Dekker, J.W.T., Demirkiran, A., Derkx-Hendriksen, M., Dijkstra, F.R., Duijvendijk, P. van, Dunker, M.S., Eijsbouts, Q.E., Fabry, H., Ferenschild, F., Foppen, J.W., Furnee, E.J.B., Gerhards, M.F., Gerven, P., Gooszen, J.A.H., Govaert, J.A., Grevenstein, W.M.U. van, Haen, R., Harlaar, J.J., Harst, E., Havenga, K., Heemskerk, J., Heeren, J.F., Heijnen, B., Heres, P., Hoff, C., Hogendoorn, W., Hoogland, P., Huijbers, A., Janssen, P., Jongen, A.C., Jonker, F.H., Karthaus, E.G., Keijzer, A., Ketel, J.M.A., Klaase, J., Kloppenberg, F.W.H., Kool, M.E., Kortekaas, R., Kruyt, P.M., Kuiper, J.T., Lamme, B., Lange, J.F., Lettinga, T., Lips, D.J., Logeman, F., Holzik, M.F.L., Madsen, E., Mamound, A., Marres, C.C., Masselink, I., Meerdink, M., Menon, A.G., Mieog, J.S., Mierlo, D., Musters, G.D., Neijenhuis, P.A., Nonner, J., Oostdijk, M., Oosterling, S.J., Paul, P.M.P., Peeters, K.C.M.J.C., Pereboom, I.T.A., Polat, F., Poortman, P., Raber, M., Reiber, B.M.M., Renger, R.J., Rossem, C.C. van, Rutten, H.J., Rutten, A., Schaapman, R., Scheer, M., Schoonderwoerd, L., Schouten, N., Schreuder, A.M., Schreurs, W.H., Simkens, G.A., Slooter, G.D., Sluijmer, H.C.E., Smakman, N., Smeenk, R., Snijders, H.S., Sonneveld, D.J.A., Spaansen, B., Bilgen, E.J.S., Steller, E., Steup, W.H., Steur, C., Stortelder, E., Straatman, J., Swank, H.A., Sietses, C., Berge, H.A. ten, Hoeve, H.G. ten, Riele, W.W. ter, Thorensen, I.M., Tip-Pluijm, B., Toorenvliet, B.R., Tseng, L., Tuynman, J.B., Bastelaar, J. van, Beek, S.V. van, Ven, A.W.H. van de, Weijer, M.A.J. van de, Berg, C. van den, Bosch, I. van den, Bilt, J.D.W. van der, Hagen, S.J. van der, Hul, R. van der, Schelling, G. van der, Spek, A. van der, Wielen, N. van der, Duyn, E. van, Eekelen, C. van, Essen, J.A. van, Gangelt, K. van, Geloven, A.A.W. van, Kessel, C. van, Loon, Y.T. van, Rijswijk, A. van, Rooijen, S.J. van, Sprundel, T. van, Steensel, L. van, Tets, W.F. van, Westreenen, H.L. van, Veltkamp, S., Verhaak, T., Verheijen, P.M., Versluis-Ossenwaarde, L., Vijfhuize, S., Vles, W.J., Voeten, S., Vogelaar, F.J., Vrijland, W.W., Westerduin, E., Westerterp, M.E., Wetzel, M., Wevers, K., Wiering, B., Witjes, A.C., Wouters, M.W., Yauw, S.T.K., Zeestraten, E.C., Zimmerman, D.D., Zwieten, T., and Dutch Snapshot Res Grp
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oncologic outcomes ,snapshot study ,Rectal cancer - Abstract
Aim A Snapshot study design eliminates changes in treatment and outcome over time. This population based Snapshot study aimed to determine current practice and outcome of rectal cancer treatment with published landmark randomized controlled trials as a benchmark.Method In this collaborative research project, the dataset of the Dutch Surgical Colorectal Audit was extended with additional treatment and long-term outcome data. All registered patients who underwent resection for rectal cancer in 2011 were eligible. Baseline characteristics and outcome were evaluated against the results of the Dutch TME trial and the COLOR II trial from which the original datasets were obtained.Results A total of 71 hospitals participated, and data were completed for 2102 out of the potential 2633 patients (79.8%). Median follow-up was 41 (interquartile range 25-47) months. Overall circumferential resection margin (CRM) involvement was 9.3% in the Snapshot cohort and 18.5% in the Dutch TME trial. CRM positivity after laparoscopic resection was 7.8% in the Snapshot and 9.5% in the COLOR II trial. Three-year overall local recurrence rate in the Snapshot was 5.9%, with a disease-free survival of 67.1% and overall survival of 79.5%. Benchmarking with the randomized controlled trials revealed an overall favourable long-term outcome of the Snapshot cohort.Conclusion This study showed that current rectal cancer care in a large unselected Dutch population is of high quality, with less positive CRM since the TME trial and oncologically safe implementation of minimally invasive surgery after the COLOR II trial.
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- 2017
19. Benchmarking recent national practice in rectal cancer treatment with landmark randomized controlled trials
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Borstlap, W.A., Deijen, C.L., Dulk, M. den, Bonjer, H.J., Velde, C.J. van de, Bemelman, W.A., Tanis, P.J., Aalbers, A., Acherman, Y., Algie, G.D., Geu-sau, B. von, Amelung, F., Aukema, T.S., Bakker, I.S., Bartels, S.A., Basha, S., Bastiaansen, A.J., Belgers, E.H.J., Bleeker, W., Blok, J., Bosker, R.J.I., Bosmans, J.W., Boute, M.C., Bouvy, N.D., Bouwman, H., Brandt-Kerkhof, A., Brinkman, D.J., Bruin, S., Bruns, E.R.J., Burbach, J.P.M., Burger, J.W., Buskens, C.J., Clermonts, S., Coene, P.P.L.O., Compaan, C., Consten, E.C., Darbyshire, T., Mik, S.M.L. de, Graaf, E.J. de, Groot, I de, Cappel de Vos Tot Nederveen, R.J.L., Wilt, J.H.W. de, Wolde, J. van der, Boer, F.C. den, Dekker, J.W.T., Demirkiran, A., Derkx-Hendriksen, M., Dijkstra, F.R., Duijvendijk, P. van, Dunker, M.S., Eijsbouts, Q.E., Fabry, H., Ferenschild, F.T.J., Foppen, J.W., Furnee, E.J.B., Gerhards, M.F., Gerven, P, Gooszen, J.A.H., Govaert, J.A., Grevenstein, W.M. van, Haen, R., Harlaar, J.J., Harst, E, Havenga, K., Heemskerk, J., Heeren, J.F., Heijnen, B., Heres, P., Hoff, C., Hogendoorn, W., Hoogland, P., Huijbers, A, Janssen, P., Jongen, A.C., Jonker, F.H., Karthaus, E.G., Keijzer, A, Ketel, J.M.A., Klaase, J., Kloppenberg, F.W.H., Kool, M.E., Kortekaas, R., Kruyt, P.M., Kuiper, J.T., Lamme, B., Lange, J.F., Lettinga, T., Lips, D.J., Logeman, F., Holzik, M.F., Madsen, E., Mamound, A., Marres, C.C., Masselink, I., Meerdink, M., Menon, A.G., Mieog, J.S., Mierlo, D. van, Musters, G.D., Neijenhuis, P.A., Nonner, J., Oostdijk, M, Oosterling, S.J., Paul, P.M.P., Peeters, K.C., Pereboom, I.T.A., Polat, F., Poortman, P., Raber, M., Reiber, B.M.M., Renger, R.J., Rossem, C.C. van, Rutten, H.J., Rutten, A., Schaapman, R., Scheer, M.G.W., Schoonderwoerd, L., Schouten, N., Schreuder, A.M., Schreurs, W.H., Simkens, G.A., Slooter, G.D., Sluijmer, H.C.E., Smakman, N., Smeenk, R., Snijders, H.S., Sonneveld, D.J.A., Spaansen, B., Spillenaar Bilgen, E.J., Steller, E., Steup, W.H., Steur, C., Stortelder, E., Straatman, J., Swank, H.A., Sietses, C., Berge, H.A. ten, Hoeve, H.G. ten, Riele, W.W. ter, Thorensen, I.M., Tip-Pluijm, B., Toorenvliet, B.R., Tseng, L., Tuynman, J.B., Bastelaar, J. van, Beek, S.V. van, Ven, A.W.H. van de, Weijer, M.A.J. van de, Berg, C. van den, Bosch, I. van den, Bilt, J.D.W. van der, Hagen, S.J. van der, Hul, R. van der, Schelling, G.P. van der, Spek, A van der, Wielen, N. van der, Duyn, E. van, Eekelen, C. van, Essen, J.A. van, Gangelt, K. van, Geloven, A.A. van, Kessel, C. Van, Loon, Y.T. van, Rijswijk, A. van, Rooijen, S.J. van, Sprundel, T. van, Steensel, L. van, Tets, W.F van, Westreenen, H.L. van, Veltkamp, S., Verhaak, T., Verheijen, P.M., Versluis-Ossenwaarde, L., Vijfhuize, S., Vles, W.J., Voeten, S., Vogelaar, F.J., Vrijland, W.W., Westerduin, E., Westerterp, M., Wetzel, M., Wevers, K., Wiering, B., Witjes, A.C., Wouters, M.W., Yauw, S.T.K., Zeestraten, E.C., Zimmerman, D., Zwieten, T., Groningen Institute for Organ Transplantation (GIOT), Value, Affordability and Sustainability (VALUE), Robotics and image-guided minimally-invasive surgery (ROBOTICS), Surgery, CCA - Cancer Treatment and quality of life, APH - Quality of Care, APH - Global Health, Anatomy and neurosciences, VU University medical center, AGEM - Re-generation and cancer of the digestive system, AGEM - Digestive immunity, Neurology, Internal medicine, ACS - Microcirculation, MUMC+: MA Heelkunde (9), RS: MHeNs - R2 - Mental Health, Psychiatrie & Neuropsychologie, Promovendi MHN, RS: MHeNs - R1 - Cognitive Neuropsychiatry and Clinical Neuroscience, RS: NUTRIM - R1 - Metabolic Syndrome, RS: NUTRIM - R2 - Liver and digestive health, Revalidatie, RS: CARIM - R1.03 - Cell biochemistry of thrombosis and haemostasis, Biochemie, Promovendi CD, Ondersteunend personeel NTM, Promovendi NTM, Promovendi PHPC, RS: GROW - R3 - Innovative Cancer Diagnostics & Therapy, MUMC+: MA AIOS Heelkunde (9), Promovendi ODB, MUMC+: MA AIOS Anesthesiologie (9), Pathologie, AGEM - Amsterdam Gastroenterology Endocrinology Metabolism, CCA - Cancer Treatment and Quality of Life, Graduate School, and Other departments
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Male ,Transanal Endoscopic Microsurgery ,Colorectal cancer ,medicine.medical_treatment ,NETHERLANDS ,law.invention ,Tumours of the digestive tract Radboud Institute for Health Sciences [Radboudumc 14] ,0302 clinical medicine ,ADJUVANT CHEMOTHERAPY ,Randomized controlled trial ,law ,Interquartile range ,Prospective Studies ,Registries ,Rectal cancer ,Intersectoral Collaboration ,Randomized Controlled Trials as Topic ,Aged, 80 and over ,Medical Audit ,Gastroenterology ,Margins of Excision ,Chemoradiotherapy ,Benchmarking ,Middle Aged ,Total mesorectal excision ,Reconstructive and regenerative medicine Radboud Institute for Molecular Life Sciences [Radboudumc 10] ,Treatment Outcome ,snapshot study ,030220 oncology & carcinogenesis ,OPEN SURGERY ,Cohort ,Female ,030211 gastroenterology & hepatology ,RADIOTHERAPY ,medicine.medical_specialty ,Disease-Free Survival ,03 medical and health sciences ,ANTERIOR RESECTION ,medicine ,Humans ,Aged ,Retrospective Studies ,oncologic outcomes ,Rectal Neoplasms ,business.industry ,General surgery ,TOTAL MESORECTAL EXCISION ,medicine.disease ,Surgery ,Reconstructive and regenerative medicine Radboud Institute for Health Sciences [Radboudumc 10] ,Radiation therapy ,Cross-Sectional Studies ,Circumferential resection margin ,Neoplasm Recurrence, Local ,business - Abstract
Aim A Snapshot study design eliminates changes in treatment and outcome over time. This population based Snapshot study aimed to determine current practice and outcome of rectal cancer treatment with published landmark randomized controlled trials as a benchmark.Method In this collaborative research project, the dataset of the Dutch Surgical Colorectal Audit was extended with additional treatment and long-term outcome data. All registered patients who underwent resection for rectal cancer in 2011 were eligible. Baseline characteristics and outcome were evaluated against the results of the Dutch TME trial and the COLOR II trial from which the original datasets were obtained.Results A total of 71 hospitals participated, and data were completed for 2102 out of the potential 2633 patients (79.8%). Median follow-up was 41 (interquartile range 25-47) months. Overall circumferential resection margin (CRM) involvement was 9.3% in the Snapshot cohort and 18.5% in the Dutch TME trial. CRM positivity after laparoscopic resection was 7.8% in the Snapshot and 9.5% in the COLOR II trial. Three-year overall local recurrence rate in the Snapshot was 5.9%, with a disease-free survival of 67.1% and overall survival of 79.5%. Benchmarking with the randomized controlled trials revealed an overall favourable long-term outcome of the Snapshot cohort.Conclusion This study showed that current rectal cancer care in a large unselected Dutch population is of high quality, with less positive CRM since the TME trial and oncologically safe implementation of minimally invasive surgery after the COLOR II trial.
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- 2017
- Full Text
- View/download PDF
20. Endoscopic TEP hernia repair. Experience in a high volume center allows for recommendations concerning still unsolved questions
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Schouten, N., Borel Rinkes, I.H.M., Dalen, Th. van, Simmermacher, R.K.J., and University Utrecht
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Geneeskunde ,surgical procedures, operative ,TEP ,Inguinal hernia ,Sexual (dys)function ,Pain ,Women ,Endoscopic inguinal hernia repair ,Learning curve - Abstract
The aim of this thesis is the endoscopic TEP hernia repair, which is an appealing technique for patients with inguinal hernias. TEP, offering an adequate intraoperative diagnosis and subsequent treatment of all hernia subtypes is in experienced hands associated with low recurrence rates and rates of (chronic) postoperative pain. The supposedly substantial learning curve remains its most important disadvantage, emphasizing the need to have TEP performed by experienced surgeons. Limited and conflicting data are available on the extent of the learning curve. In Chapter 2 of this thesis, the relation between (surgeon) expertise and operative time, perioperative complications, conversion rate and recurrences was studied, in order to define the end of the learning curve of TEP. It was observed that during the first 50-100 TEP repairs, outcomes optimized in terms of intraoperative complications and recurrences, while a decline in the conversion rate, incidence of short-term postoperative complications and operative time was still observed after more than 400 individually performed TEP procedures. In addition, the overall perioperative complication rate and the incidence of chornic pain compared favorably to these outcomes reported by others. Since the setting of this thesis is a high volume TEP clinic, these outcomes also imply relevance of “concentration of care”. During the learning curve of TEP, the risk of serious complications is higher and operative times are longer. Perioperative difficulties encountered during this period may be reason for the surgeon to abandon this operative technique. In Chapter 3, patient- and hernia related characteristics associated with perioperative complications and operative time were studied. It was observed that the surgeon gaining experience with TEP repair should select young and slender male patients with a unilateral inguinal hernia and no previous abdominal surgery, in order to best overcome the learning curve. In Chapter 4 the outcomes of TEP hernia repair in a subset of female patients were studied. It showed that femoral hernias are very common in women, but that preoperative diagnosis of the correct hernia type is difficult. A TEP repair offers the opportunity to diagnose all hernia types intraoperatively and to treat them appropriately with excellent outcomes. The second part of this thesis focuses on several longterm outcomes after TEP. Reported incidences of debilitating chronic pain vary between 2-5% after endoscopic hernia repair, hence significantly lower compared to pain rates of 11-21% after conventional open hernia repair. Chapter 5 describes pain after TEP being selflimiting within the first postoperative year, with only 1% of the patients reporting substantial pain. The incidence of impaired sexual function due to pain also decreased from to 1% postoperatively. Male fertility is supposedly at risk in patients undergoing hernia repair. This might be due to vascular injury or iatrogenic damage/scarring of the vas deferens. In the review described in Chapter 7, several animal models show sustantial effects of hernia surgery on the structures in the spermatic cord. Clinical studies, however, indicate that this impact is limited. Future studies are needed to further investigate the clinical relevance of (endoscopic) hernia repair on male fertility.
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- 2013
21. Prisma study: The efficacy of neurofeedback to improve speeds, memory and attention in pediatric brain tumor survivors: A randomized controlled trial
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Ruiter, M., Schouten, N., Grootenhuis, M., van Mourik, R., Oosterlaan, J., and Clinical Neuropsychology
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- 2011
22. Feasibility of neurofeedback for reducing neurocognitive deficits after a childhood brain tumor
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Aukema, E., de Ruiter, M.B., Last, B., Schouten, N., Breteler, R., Hogeweg, J., Grootenhuis, M., Clinical Developmental Psychology, Psychiatry, EMGO - Mental health, and EMGO+ - Mental Health
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- 2010
23. Re-use of laundry rinsing water by low cost adsorption technology
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Schouten, N., de Haan, André B., and Ham, van der, Anne G.J.
- Abstract
Shortage of water is a growing global problem. One way of dealing with this problem is the development of technologies for wastewater clean-up and re-use. Laundry accounts often for more than half of the daily domestic water consumption in countries like India. The major part of laundry water is rinsing water. Laundry rinsing water is relatively clean and therefore highly suitable for clean-up and re-use. The objective of this thesis is to design a rinsing water recycler (RWR) for low cost decentral recycling of laundry rinsing water. To design a RWR with an optimal performance, criteria were determined that needed to be fulfilled: removal of the main components from rinsing water, household scale, low cost, no power source needed, easy to use, portable, safe, attractive to culture, no recycling of the adsorbent and low amount of waste. The application of adsorption technology for clean-up of laundry rinsing water offers high potential. It can be low cost, applied in small devices, no power is necessary and is therefore suitable for use on low-income household scale. The project started with the removal of the main component in laundry rinsing water, namely the anionic surfactant, linear alkyl benzene sulfonate (LAS). Selection of the adsorbent is of main importance, because it determines the adsorption capacity and by that the operation cost of the RWR, the size of the RWR and the amount of waste. Furthermore, the adsorbent should be safe to use and safe to discharge in the environment. A selection of potential adsorbents with different surfactant adsorption mechanisms was investigated. The surface charge of adsorbents was found to be the most important parameter to obtain a high adsorption capacity. A positive surface interacts with the negative head group of LAS molecules and results in a high adsorption capacity. Non-ionic interactions, such as hydrophobic interactions between LAS and activated carbons, result in a lower adsorption capacity. Negatively charged materials do not adsorb LAS at all. The adsorbents were compared by LAS adsorption capacity and cost. Layered double hydroxide (LDH) was found to be very promising because of the high adsorption capacity and activated carbons (AC) were suitable because of their relatively low cost. Based on the type of material no safety or environmental issues are expected when both adsorbents are used and disposed. The LAS adsorption capacity of LDH is very promising and therefore the process parameters of the LDH production (co-precipitation method) on the LDH structure, stability and LAS adsorption capacity were investigated. The highest adsorption capacity was obtained for calcinated LDH with a M2+/M3+ ratio of 1 and 2 because of the high charge density at these ratios. LDH can be applied in a small device for re-use laundry rinsing water for short term use only. LDH aggregates are instable and the adsorption capacity of anionic surfactants reduces dramatically after prolonged use and storage in aqueous surroundings. This is probably caused by the rearrangement of the nano size crystallites of which a LDH aggregate consists. The crystallites slip past each other and form a denser structure restricting the access of the surfactant molecules. The RWR operating time depends on the adsorption kinetics. The LAS adsorption rate on activated carbon and LDH was investigated with the zero length column (ZLC) method. The influence of pre-treatment of the adsorbent, flow rate, particle size and initial LAS concentration on the adsorption rate were investigated. The experimental results were described with several models to determine the rate limiting step and accompanying parameters. The adsorption of LAS onto granular activated carbon (Norit GAC-1240) was well described by the selected adsorption model. The effective diffusion coefficient of LAS onto GAC-1240 is 1.3·10-10 ± 0.2 ·10-10 m2/s and does not change with particle size of GAC-1240 or initial LAS concentration. The adsorption of LAS onto LDH was not well described by the adsorption model or the ion exchange model. The LAS adsorption rate follows a first order decline. This cannot be caused by chemisorption because the adsorbent particle size influences the LAS adsorption rate. Surfactant molecules form a double layer or bilayer on oppositely charged surfaces resulting in a film layer resistance. A double layer model resulted in a good description of the experimental results for LAS adsorption onto LDH. The resistance of LAS adsorption onto LDH was found to be situated completely in the double layer outside the particle. The double layer mass transfer coefficient is 7·10-5 ± 2·10-5 m/s. LAS is not the only contaminant in laundry rinsing water. Other contaminates present in laundry rinsing water could influence the LAS adsorption. Sodium triphosphate (STP), sodium carbonate (Na2CO3) and sodium chloride (NaCl) present in laundry rinsing water were investigated for their influence on the LAS adsorption capacity and LAS adsorption rate onto GAC-1240 and LDH. There is no large effect of STP, Na2CO3 and NaCl on the adsorption capacity of LAS onto GAC-1240 and LDH. STP, Na2CO3 and NaCl increased the LAS adsorption rate onto GAC-1240. This is caused by an increase in ionic strength that enhances LAS adsorption. For LDH, NaCl increased the LAS adsorption rate also by increasing the ionic strength. Both STP and Na2CO3 decrease the LAS adsorption rate. CO3 2- and STP compete with LAS for the adsorption onto LDH. However, in time LAS expels CO3 2- and STP from the LDH structure. The application of a suitable adsorbent in the RWR is most practical in a column operation. The main reason is the high adsorption capacity of the bed since it is in equilibrium with the influent concentration rather than the effluent concentration. Small column experiments were performed to investigate the adsorption of LAS onto GAC-1240 in a column application. The column is designed for a long term operation and therefore LDH is not investigated. The influence of flow rate, bed height, initial LAS concentration, external mass transfer and flow direction on the breakthrough curve was investigated. In parallel a mathematical model was developed that described the experimental results well. The main deviation between the model and experimental results is caused by neglecting the effect of the particle size distribution of the adsorbent. The model assumes one particle size, where in practice the adsorbent consists of particles ranging from 315 to 500 µm. The model is used to design a column for the rinsing water recycler (RWR) to treat 25 litres of laundry rinsing water per day during an extended period. This resulted in two designs; a column (Diameter=0.06 m; Heigth=0.18 m) with a flow rate of 50 ml/min and with a flow rate of 100 ml/min. The adsorbent cost of both columns is around $12-15 per year. Three prototypes of the RWR were developed for the clean-up of laundry rinsing water. Two prototypes consist of GAC-1240 in a column operation: the bucket-tobucket and siphon. The third prototype, the permeable bag, is designed for short term operation and instantly cleans the laundry rinsing water during rinsing. The permeable bag was tested with a LAS solution and GAC-1240 or LDH. The amount of GAC- 1240 and LDH to clean one litre of rinsing water was high, which makes the cost and amount of waste too high, therefore the permeable bag is disregarded. The two prototypes consisting of the column operation were tested with model rinsing water. Model rinsing water contains a high concentration of particulate soil that does not settle and easily clogs filters and columns. Therefore, an additional step, coagulation was introduced to remove the particulate soil. The combination of coagulation and adsorption in the RWRs is very effective in removing LAS, STP, perfumes and model soil. The bucket-to-bucket and siphon prototypes meet all the initially determined criteria and were exposed to early consumer tests. The RWR prototypes were discussed in two consumer groups and successfully tested by four individual consumers in Phulera, Rajasthan, India. The flow rate is an important point for improvement according to the consumers. This can be improved by increasing the diameter of the column or by increasing the LAS adsorption rate by decreasing the particle size of the adsorbent. The consumers are interested in using and purchasing the prototypes because they are easy to use, small and clean the rinsing water to a satisfactory quality to reuse it for other household applications.
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- 2009
24. Low Cost Detergent Ingredient Adsorption Technology for Sustainable Decentral Water Usage
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Schouten, N. and Banis, G.H.
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- 2005
25. Ultra-fast LIGBTs and superjunction devices in membrane technology.
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Udrea, F., Trajkovic, T., Lee, C., Garner, D., Yuan, X., Joyce, J., Udugampola, N., Bonnet, G., Coulson, D., Jacques, R., Izmajlowicz, M., van der Duijn Schouten, N., Ansari, Z., Moyse, P., and Amaratunga, G.A.J.
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- 2005
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26. Development and validation of a gonadotropin dose selection model for optimized ovarian stimulation in IVF/ICSI: an individual participant data meta-analysis.
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Schouten N, Wang R, Torrance H, Van Tilborg T, Bastu E, Bergh C, D'Hooghe T, Friis Petersen J, Jayaprakasan K, Khalaf Y, Klinkert E, La Marca A, Vuong L, Lapensée L, Lensen S, Magnusson Å, Allegra A, Nyboe Andersen A, Oudshoorn S, Popovic-Todorovic B, Mol BW, Eijkemans M, and Broekmans F
- Abstract
Background: The ovarian response to gonadotropin stimulation varies widely among women, and could impact the probability of live birth as well as treatment risks. Many studies have evaluated the impact of different gonadotropin starting doses, mainly based on predictive variables like ovarian reserve tests (ORT) including anti-Müllerian hormone (AMH), antral follicle count (AFC), and basal follicle-stimulating hormone (bFSH). A Cochrane systematic review revealed that individualizing the gonadotropin starting dose does not affect efficacy in terms of ongoing pregnancy/live birth rates, but may reduce treatment risks such as the development of ovarian hyperstimulation syndrome (OHSS). An individual patient data meta-analysis (IPD-MA) offers a unique opportunity to develop and validate a universal prediction model to help choose the optimal gonadotropin starting dose to minimize treatment risks without affecting efficacy., Objective and Rationale: The objective of this IPD-MA is to develop and validate a gonadotropin dose-selection model to guide the choice of a gonadotropin starting dose in IVF/ICSI, with the purpose of minimizing treatment risks without compromising live birth rates., Search Methods: Electronic databases including MEDLINE, EMBASE, and CRSO were searched to identify eligible studies. The last search was performed on 13 July 2022. Randomized controlled trials (RCTs) were included if they compared different doses of gonadotropins in women undergoing IVF/ICSI, presented at least one type of ORT, and reported on live birth or ongoing pregnancy. Authors of eligible studies were contacted to share their individual participant data (IPD). IPD and information within publications were used to determine the risk of bias. Generalized linear mixed multilevel models were applied for predictor selection and model development., Outcomes: A total of 14 RCTs with data of 3455 participants were included. After extensive modeling, women aged 39 years and over were excluded, which resulted in the definitive inclusion of 2907 women. The optimal prediction model for live birth included six predictors: age, gonadotropin starting dose, body mass index, AFC, IVF/ICSI, and AMH. This model had an area under the curve (AUC) of 0.557 (95% confidence interval (CI) from 0.536 to 0.577). The clinically feasible live birth model included age, starting dose, and AMH and had an AUC of 0.554 (95% CI from 0.530 to 0.578). Two models were selected as the optimal model for combined treatment risk, as their performance was equal. One included age, starting dose, AMH, and bFSH; the other also included gonadotropin-releasing hormone (GnRH) analog. The AUCs for both models were 0.769 (95% CI from 0.729 to 0.809). The clinically feasible model for combined treatment risk included age, starting dose, AMH, and GnRH analog, and had an AUC of 0.748 (95% CI from 0.709 to 0.787)., Wider Implications: The aim of this study was to create a model including patient characteristics whereby gonadotropin starting dose was predictive of both live birth and treatment risks. The model performed poorly on predicting live birth by modifying the FSH starting dose. On the contrary, predicting treatment risks in terms of OHSS occurrence and management by modifying the gonadotropin starting dose was adequate. This dose-selection model, consisting of easily obtainable patient characteristics, aids in the choice of the optimal gonadotropin starting dose for each individual patient to lower treatment risks and potentially reduce treatment costs., (© The Author(s) 2024. Published by Oxford University Press on behalf of European Society of Human Reproduction and Embryology.)
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- 2024
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27. AGREE II Quality Assessment of National and International Clinical Practice Guidelines on Prostate Cancer Management by the OPTIMA Consortium.
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Sakalis V, Bhattacharya Y, Beyer K, Murray C, Smith EJ, Willemse PM, Gandaglia G, Boissier R, Borkowetz A, Dabestani S, Leenen RCA, Vilaseca A, Maresca G, Teoh J, Gómez Rivas J, Rajwa P, Lardas M, Grivas N, Van den Broeck T, Pradere B, Schouten N, Tandogdu Z, Evans-Axelsson S, Maclennan S, Thomas M, Briganti A, Bjartell A, Cornford P, Kruger H, N'Dow J, Roobol MJ, and Omar MI
- Abstract
Background and Objective: Clinical practice guidelines for prostate cancer (PCa) are a valuable resource for everyday clinical practice. The clinical practice guidelines and recommendations produced by various societies should demonstrate a considerable level of consistency in terms of quality, regardless of the society that developed these given the common evidence base. However, to date, no study has assessed the quality of PCa clinical practice guidelines. As part of the Optimal Treatment for Patients with Solid Tumours in Europe Through Artificial intelligence (OPTIMA) project, we evaluated the quality of the most frequently used national and international clinical practice guidelines for PCa using the Appraisal of Guidelines for Research & Evaluation II (AGREE II) tool., Methods: The quality of the identified clinical practice guidelines was assessed independently by two assessors using the AGREE II tool. The AGREE II tool comprises 23 different items organised into six domains, rated on a 7-point scale (1: strongly disagree to 7: strongly agree). The total score of the appraisal was the mean value of the two assessments. The agreement between assessors' scores was calculated using the interclass correlation coefficient (ICC). Four key recommendations were compared among the included clinical practice guidelines to assess consistency., Key Findings and Limitations: Sixteen clinical practice guidelines were assessed using their latest available version (cut-off April 2024). The European Association of Urology, S3LL PCa, Belgian Health Care Knowledge Centre, National Comprehensive Cancer Network, and Prostatacancer-Nationellt vårdprogram guidelines received the highest overall scores with a mean domain score of 82.4% (range: 75.5-88.3%). The de l'Association Française d'Urologie (AFU), American Urological Association, and National Institute for Health and Care Excellence received a mean domain score of 77.6% (range: 73.7-84.0%). Below average were the European Society for Medical Oncology, localised (L) and systemic (S) CPPC American Society of Clinical Oncology, and Nederlandse Vereniging voor Urologie (NVU) with a mean domain score of 58.4% (range: 43.5-76.3%). The reasons for scoring below average included the following: inadequate information about the methodology applied, limited scope of the guideline, and limited patient engagement. The highest inter-rater variability was observed in NVU (ICC: 0.58) and the lowest in AFU-L (ICC: 0.84). When examining the scores of each domain, "clarity of presentation" (domain 4) achieved the highest score with a mean of 86.9% ± 12.6%. The domain with the lowest score was applicability (domain 5), with a mean of 48.3% ± 24.8%. The ICC was calculated to be 0.72 (±0.08)., Conclusions and Clinical Implications: This is the first study in which a comprehensive quality assessment of the majority of international and national clinical practice guidelines was undertaken, and the key recommendations were compared to assess consistency. Our study shows that the majority of international and national clinical practice guidelines demonstrate high-quality standards when assessed using the AGREE II evaluation tool. The clinical practice guidelines that did not meet the expected standards could be improved by adopting several key recommendations outlined by our study., Patient Summary: The OPTIMA project used the Appraisal of Guidelines for Research & Evaluation II (AGREE II) tool to evaluate the quality of 16 commonly used national and international clinical practice guidelines for prostate cancer. While some of these international and national clinical practice guidelines received the highest score, few guidelines scored below average due to methodological deficiencies and limited patient engagement. These findings highlight the need for a standardised process to ensure high-quality, consistent guidelines across practices., (© 2024 The Author(s).)
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- 2024
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28. Invasion of superbugs: Cockroach-driven outbreak of multidrug-resistant Enterobacter in an ICU.
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Hanrahan J, Schouten N, Fyffe SH, Jencson A, and Stroever S
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Objective: To describe factors in an outbreak of multidrug-resistant Enterobacter cloacae (MRE) in an intensive care unit (ICU) over a 20-month period including the likely contribution of cockroaches to the outbreak., Design: This is a retrospective descriptive study., Setting: ICU in an urban hospital., Patients: All patients admitted to the ICU during the 20-month outbreak period were included in the study., Interventions: Infection prevention interventions included contact isolation, hand hygiene, dedicated patient equipment, environmental cultures, and pest control., Results: 25 patients were identified as being colonized or infected with MRE. Relatedness of the outbreak strain and strains found in cockroaches was demonstrated by pulse field gel electrophoresis. Standard IP interventions did not have an impact on the outbreak until pest control was added. Once additional pest control measures were put in place, the outbreak ended., Conclusions: Insects have a potential role in transmission of pathogens in hospitals and their role should be considered when outbreaks are being investigated., Competing Interests: There are no conflicting interests pertaining to this project.There are no declarations to be made regarding this study., (© The Author(s) 2024.)
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- 2024
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29. Summary Paper on Underactive Bladder from the European Association of Urology Guidelines on Non-neurogenic Male Lower Urinary Tract Symptoms.
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Baboudjian M, Hashim H, Bhatt N, Creta M, De Nunzio C, Gacci M, Herrmann T, Karavitakis M, Malde S, Moris L, Netsch C, Rieken M, Sakalis V, Schouten N, Tutolo M, and Cornu JN
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- Humans, Male, Europe, Urodynamics, Lower Urinary Tract Symptoms therapy, Lower Urinary Tract Symptoms diagnosis, Lower Urinary Tract Symptoms physiopathology, Lower Urinary Tract Symptoms etiology, Practice Guidelines as Topic, Urinary Bladder, Underactive diagnosis, Urinary Bladder, Underactive etiology, Urinary Bladder, Underactive physiopathology, Urinary Bladder, Underactive therapy, Urology standards
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Background and Objective: The European Association of Urology (EAU) Guidelines Panel on non-neurogenic male lower urinary tract symptoms (LUTS) aimed to develop a new subchapter on underactive bladder (UAB) in non-neurogenic men to inform health care providers of current best evidence and practice. Here, we present a summary of the UAB subchapter that is incorporated into the 2024 version of the EAU guidelines on non-neurogenic male LUTS., Methods: A systematic literature search was conducted from 2002 to 2022, and articles with the highest certainty evidence were selected. A strength rating has been provided for each recommendation according to the EAU Guideline Office methodology., Key Findings and Limitations: Detrusor underactivity (DU) is a urodynamic diagnosis defined as a contraction of reduced strength and/or duration, resulting in prolonged bladder emptying and/or failure to achieve complete bladder emptying within a normal time span. UAB is a terminology that should be reserved for describing symptoms and clinical features related to DU. Invasive urodynamics is the only widely accepted method for diagnosing DU. In patients with persistently elevated postvoid residual (ie, >300 ml), intermittent catheterization is indicated and preferred to indwelling catheters. Alpha-adrenergic blockers are recommended before more invasive techniques, but the level of evidence is low. In men with DU and concomitant benign prostatic obstruction (BPO), benign prostatic surgery should be considered only after appropriate counseling. In men with DU and no BPO, a test phase of sacral neuromodulation may be considered., Conclusions and Clinical Implications: The current text represents a summary of the new subchapter on UAB. For more detailed information, refer to the full-text version available on the EAU website (https://uroweb.org/guidelines/management-of-non-neurogenic-male-luts)., (Copyright © 2024 European Association of Urology. Published by Elsevier B.V. All rights reserved.)
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- 2024
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30. Resistance, rebound, and recurrence regrowth patterns in pediatric low-grade glioma treated by MAPK inhibition: A modified Delphi approach to build international consensus-based definitions-International Pediatric Low-Grade Glioma Coalition.
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O'Hare P, Cooney T, de Blank P, Gutmann DH, Kieran M, Milde T, Fangusaro J, Fisher M, Avula S, Packer R, Fukuoka K, Mankad K, Mueller S, Waanders AJ, Opocher E, Bouffet E, Raabe E, Werle NE, Azizi AA, Robison NJ, Hernáiz Driever P, Russo M, Schouten N, van Tilburg CM, Sehested A, Grill J, Bandopadhayay P, Kilday JP, Witt O, Ashley DM, Ertl-Wagner BB, Tabori U, and Hargrave DR
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- Humans, Child, Protein Kinase Inhibitors therapeutic use, Neoplasm Grading, Glioma drug therapy, Glioma pathology, Brain Neoplasms drug therapy, Brain Neoplasms pathology, Neoplasm Recurrence, Local drug therapy, Neoplasm Recurrence, Local pathology, Drug Resistance, Neoplasm, Consensus, Delphi Technique
- Abstract
Pediatric low-grade glioma (pLGG) is the most common childhood brain tumor group. The natural history, when curative resection is not possible, is one of a chronic disease with periods of tumor stability and episodes of tumor progression. While there is a high overall survival rate, many patients experience significant and potentially lifelong morbidities. The majority of pLGGs have an underlying activation of the RAS/MAPK pathway due to mutational events, leading to the use of molecularly targeted therapies in clinical trials, with recent regulatory approval for the combination of BRAF and MEK inhibition for BRAFV600E mutated pLGG. Despite encouraging activity, tumor regrowth can occur during therapy due to drug resistance, off treatment as tumor recurrence, or as reported in some patients as a rapid rebound growth within 3 months of discontinuing targeted therapy. Definitions of these patterns of regrowth have not been well described in pLGG. For this reason, the International Pediatric Low-Grade Glioma Coalition, a global group of physicians and scientists, formed the Resistance, Rebound, and Recurrence (R3) working group to study resistance, rebound, and recurrence. A modified Delphi approach was undertaken to produce consensus-based definitions and recommendations for regrowth patterns in pLGG with specific reference to targeted therapies., (© The Author(s) 2024. Published by Oxford University Press on behalf of the Society for Neuro-Oncology.)
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- 2024
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31. EAU-EANM-ESTRO-ESUR-ISUP-SIOG Guidelines on Prostate Cancer-2024 Update. Part I: Screening, Diagnosis, and Local Treatment with Curative Intent.
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Cornford P, van den Bergh RCN, Briers E, Van den Broeck T, Brunckhorst O, Darraugh J, Eberli D, De Meerleer G, De Santis M, Farolfi A, Gandaglia G, Gillessen S, Grivas N, Henry AM, Lardas M, van Leenders GJLH, Liew M, Linares Espinos E, Oldenburg J, van Oort IM, Oprea-Lager DE, Ploussard G, Roberts MJ, Rouvière O, Schoots IG, Schouten N, Smith EJ, Stranne J, Wiegel T, Willemse PM, and Tilki D
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- Humans, Male, Early Detection of Cancer standards, Prostatic Neoplasms therapy, Prostatic Neoplasms pathology, Prostatic Neoplasms diagnosis
- Abstract
Background and Objective: The European Association of Urology (EAU)-European Association of Nuclear Medicine (EANM)-European Society for Radiotherapy and Oncology (ESTRO)-European Society of Urogenital Radiology (ESUR)-International Society of Urological Pathology (ISUP)-International Society of Geriatric Oncology (SIOG) guidelines provide recommendations for the management of clinically localised prostate cancer (PCa). This paper aims to present a summary of the 2024 version of the EAU-EANM-ESTRO-ESUR-ISUP-SIOG guidelines on the screening, diagnosis, and treatment of clinically localised PCa., Methods: The panel performed a literature review of all new data published in English, covering the time frame between May 2020 and 2023. The guidelines were updated, and a strength rating for each recommendation was added based on a systematic review of the evidence., Key Findings and Limitations: A risk-adapted strategy for identifying men who may develop PCa is advised, generally commencing at 50 yr of age and based on individualised life expectancy. The use of multiparametric magnetic resonance imaging in order to avoid unnecessary biopsies is recommended. When a biopsy is considered, a combination of targeted and regional biopsies should be performed. Prostate-specific membrane antigen positron emission tomography imaging is the most sensitive technique for identifying metastatic spread. Active surveillance is the appropriate management for men with low-risk PCa, as well as for selected favourable intermediate-risk patients with International Society of Urological Pathology grade group 2 lesions. Local therapies are addressed, as well as the management of persistent prostate-specific antigen after surgery. A recommendation to consider hypofractionation in intermediate-risk patients is provided. Patients with cN1 PCa should be offered a local treatment combined with long-term intensified hormonal treatment., Conclusions and Clinical Implications: The evidence in the field of diagnosis, staging, and treatment of localised PCa is evolving rapidly. These PCa guidelines reflect the multidisciplinary nature of PCa management., Patient Summary: This article is the summary of the guidelines for "curable" prostate cancer. Prostate cancer is "found" through a multistep risk-based screening process. The objective is to find as many men as possible with a curable cancer. Prostate cancer is curable if it resides in the prostate; it is then classified into low-, intermediary-, and high-risk localised and locally advanced prostate cancer. These risk classes are the basis of the treatments. Low-risk prostate cancer is treated with "active surveillance", a treatment with excellent prognosis. For low-intermediary-risk active surveillance should also be discussed as an option. In other cases, active treatments, surgery, or radiation treatment should be discussed along with the potential side effects to allow shared decision-making., (Copyright © 2024 European Association of Urology. Published by Elsevier B.V. All rights reserved.)
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- 2024
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32. EAU-EANM-ESTRO-ESUR-ISUP-SIOG Guidelines on Prostate Cancer. Part II-2024 Update: Treatment of Relapsing and Metastatic Prostate Cancer.
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Tilki D, van den Bergh RCN, Briers E, Van den Broeck T, Brunckhorst O, Darraugh J, Eberli D, De Meerleer G, De Santis M, Farolfi A, Gandaglia G, Gillessen S, Grivas N, Henry AM, Lardas M, J L H van Leenders G, Liew M, Linares Espinos E, Oldenburg J, van Oort IM, Oprea-Lager DE, Ploussard G, Roberts MJ, Rouvière O, Schoots IG, Schouten N, Smith EJ, Stranne J, Wiegel T, Willemse PM, and Cornford P
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- Humans, Male, Neoplasm Metastasis, Prostatic Neoplasms, Castration-Resistant pathology, Prostatic Neoplasms, Castration-Resistant therapy, Prostatic Neoplasms, Castration-Resistant drug therapy, Neoplasm Recurrence, Local, Prostatic Neoplasms pathology, Prostatic Neoplasms therapy
- Abstract
Background and Objective: The European Association of Urology (EAU)-European Association of Nuclear Medicine (EANM)-European Society for Radiotherapy and Oncology (ESTRO)-European Society of Urogenital Radiology (ESUR)-International Society of Urological Pathology (ISUP)-International Society of Geriatric Oncology (SIOG) guidelines on the treatment of relapsing, metastatic, and castration-resistant prostate cancer (PCa) have been updated. Here we provide a summary of the 2024 guidelines., Methods: The panel performed a literature review of new data, covering the time frame between 2020 and 2023. The guidelines were updated and a strength rating for each recommendation was added on the basis of a systematic review of the evidence., Key Findings and Limitations: Risk stratification for relapsing PCa after primary therapy may guide salvage therapy decisions. New treatment options, such as androgen receptor-targeted agents (ARTAs), ARTA + chemotherapy combinations, PARP inhibitors and their combinations, and prostate-specific membrane antigen-based therapy have become available for men with metastatic PCa., Conclusions and Clinical Implications: Evidence for relapsing, metastatic, and castration-resistant PCa is evolving rapidly. These guidelines reflect the multidisciplinary nature of PCa management. The full version is available online (http://uroweb.org/guideline/ prostate-cancer/)., Patient Summary: This article summarises the 2024 guidelines for the treatment of relapsing, metastatic, and castration-resistant prostate cancer. These guidelines are based on evidence and guide doctors in discussing treatment decisions with their patients. The guidelines are updated every year., (Copyright © 2024. Published by Elsevier B.V.)
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- 2024
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33. Summary of the 2024 Update of the European Association of Urology Guidelines on Neurourology.
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Sartori AM, Kessler TM, Castro-Díaz DM, de Keijzer P, Del Popolo G, Ecclestone H, Frings D, Groen J, Hamid R, Karsenty G, Musco S, Padilla-Fernández B, Pannek J, Schouten N, van der Vorm A, and Blok BFM
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- Humans, Europe, Urologic Diseases therapy, Urologic Diseases diagnosis, Societies, Medical, Nervous System Diseases therapy, Nervous System Diseases diagnosis, Urology standards, Practice Guidelines as Topic
- Abstract
Background and Objective: Most patients with neurourological disorders require lifelong medical care. The European Association of Urology (EAU) regularly updates guidelines for diagnosis and treatment of these patients. The objective of this review is to provide a summary of the 2024 updated EAU guidelines on neurourology., Methods: A structured literature review covering the timeframe 2021-2023 was conducted for the guideline update. A level of evidence and a strength rating were assigned for each recommendation on the basis of the literature data., Key Findings and Limitations: Neurological conditions significantly affect urinary, sexual, and bowel function, and lifelong management is required for neurourological patients to maintain their quality of life and prevent urinary tract deterioration. Early diagnosis and effective treatment are key, and comprehensive clinical assessments, including urodynamics, are crucial. Management should be customised to individual needs and should involve a multidisciplinary approach and address sexuality and fertility. Lifelong monitoring and follow-up highlight the importance of continuous care for neurourological patients., Conclusions and Clinical Implications: The 2024 EAU guidelines on neurourology provide an up-to-date overview of available evidence on diagnosis, treatment, and follow-up for neurourological patients., Patient Summary: Neurological disorders very frequently affect the lower urinary tract and sexual and bowel function and patients need lifelong management. We summarise the updated European Association of Urology guidelines on neurourology to provide patients and caregivers with the latest insights for optimal health care support., (Copyright © 2024 European Association of Urology. Published by Elsevier B.V. All rights reserved.)
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- 2024
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34. Summary Paper of the Updated 2023 European Association of Urology Guidelines on Urological Trauma.
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Serafetinidis E, Campos-Juanatey F, Hallscheidt P, Mahmud H, Mayer E, Schouten N, Sharma DM, Waterloos M, Zimmermann K, and Kitrey ND
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- Humans, Europe, Societies, Medical, Urinary Tract injuries, Wounds and Injuries therapy, Urology, Practice Guidelines as Topic
- Abstract
Context: The European Association of Urology (EAU) Guidelines Panel for Urological Trauma has produced guidelines in order to assist medical professionals in the management of urological trauma in adults for the past 20 yr. It must be emphasised that clinical guidelines present the best evidence available to the experts, but following guideline recommendations will not necessarily result in the best outcome. Guidelines can never replace clinical expertise when making treatment decisions for individual patients regarding other parameters such as experience and available facilities. Guidelines are not mandates and do not purport to be a legal standard of care., Objective: To present a summary of the 2023 version of the EAU guidelines on the management of urological trauma., Evidence Acquisition: A systematic literature search was conducted from 1966 to 2022, and articles with the highest certainty evidence were selected. It is important to note that due to its nature, genitourinary trauma literature still relies heavily on expert opinion and retrospective series., Evidence Synthesis: Databases searched included Medline, EMBASE, and the Cochrane Libraries, covering a time frame between May 1, 2021 and April 29, 2022. A total of 1236 unique records were identified, retrieved, and screened for relevance., Conclusions: The guidelines provide an evidence-based approach for the management of urological trauma., Patient Summary: Trauma is a serious public health problem with significant social and economic costs. Urological trauma is common; traffic accidents, falls, intrapersonal violence, and iatrogenic injuries are the main causes. Developments in technology, continuous training of medical professionals, and improved care of polytrauma patients reduce morbidity and maximise the opportunity for quick recovery., (Copyright © 2023. Published by Elsevier B.V.)
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- 2024
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35. From BPH to male LUTS: a 20-year journey of the EAU guidelines.
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Gravas S, Malde S, Cornu JN, Gacci M, Gratzke C, Herrmann TRW, Karavitakis M, Mamoulakis C, Rieken M, Sakalis VI, Schouten N, Smith EJ, Speakman MJ, Tikkinen KAO, Alivizatos G, Bach T, Bachmann A, Descazeaud A, Desgrandchamps F, Drake M, Emberton M, Kyriazis I, Madersbacher S, Michel MC, N'Dow J, Perachino M, Plass K, Rioja Sanz C, Umbach R, de Wildt M, Oelke M, and de la Rosette JJMCH
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- Humans, Male, Prostatic Neoplasms, Prostatic Hyperplasia complications, Prostatic Hyperplasia diagnosis, Prostatic Hyperplasia epidemiology, Lower Urinary Tract Symptoms diagnosis, Lower Urinary Tract Symptoms epidemiology, Lower Urinary Tract Symptoms etiology
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- 2024
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36. Summary Paper on the 2023 European Association of Urology Guidelines on the Management of Non-neurogenic Male Lower Urinary Tract Symptoms.
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Gravas S, Gacci M, Gratzke C, Herrmann TRW, Karavitakis M, Kyriazis I, Malde S, Mamoulakis C, Rieken M, Sakalis VI, Schouten N, Speakman MJ, Tikkinen KAO, and Cornu JN
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- Humans, Male, Urinalysis adverse effects, Urology, Lower Urinary Tract Symptoms diagnosis, Lower Urinary Tract Symptoms etiology, Lower Urinary Tract Symptoms therapy, Nocturia, Prostatic Neoplasms complications, Prostatic Hyperplasia complications, Prostatic Hyperplasia diagnosis, Prostatic Hyperplasia therapy
- Abstract
Context: Lower urinary tract symptoms (LUTS) are common, often bothersome, and have multifactorial aetiology., Objective: To present a summary of the 2023 version of the European Association of Urology guidelines on the management of male LUTS., Evidence Acquisition: A structured literature search from 1966 to 2021 selected the articles with the highest certainty evidence. The Delphi technique consensus approach was used to develop the recommendations., Evidence Synthesis: The assessment of men with LUTS should be practical. A careful medical history and physical examination are essential. Validated symptom scores, urine test, uroflowmetry, and postvoid urine residual, as well as frequency-volume charts for patients with nocturia or predominately storage symptoms should be used. Prostate-specific antigen should be ordered if a diagnosis of prostate cancer changes the treatment plan. Urodynamics should be performed for selected patients. Men with mild symptoms are candidates for watchful waiting. Behavioural modification should be offered to men with LUTS prior to, or concurrent with, treatment. The choice of medical treatment depends on the assessment findings, predominant type of symptoms, ability of the treatment to change the findings, and the expectations to be met in terms of the speed of onset, efficacy, side effects, and disease progression. Surgery is reserved for men with absolute indications, and for patients who fail or prefer not to receive medical therapy. Surgical management has been divided into five sections: resection, enucleation, vaporisation, and alternative ablative and nonablative techniques. The choice of surgical technique depends on patient's characteristics, expectations, and preferences; surgeon's expertise; and availability of modalities., Conclusions: The guidelines provide an evidence-based approach for the management of male LUTS., Patient Summary: A clinical assessment should identify the cause(s) of symptoms and define the clinical profile and patient's expectations. The treatment should aim to ameliorate symptoms and reduce the risk of complications., (Copyright © 2023 European Association of Urology. Published by Elsevier B.V. All rights reserved.)
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- 2023
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37. Mapping European Association of Urology Guideline Practice Across Europe: An Audit of Androgen Deprivation Therapy Use Before Prostate Cancer Surgery in 6598 Cases in 187 Hospitals Across 31 European Countries.
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MacLennan S, Azevedo N, Duncan E, Dunsmore J, Fullwood L, Lumen N, Plass K, Ribal MJ, Roobol MJ, Nieboer D, Schouten N, Skolarus TA, Smith EJ, N'Dow J, Mottet N, and Briganti A
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- Male, Humans, Androgen Antagonists adverse effects, Androgens therapeutic use, Cross-Sectional Studies, Retrospective Studies, Europe, Hospitals, Prostatic Neoplasms drug therapy, Prostatic Neoplasms surgery, Urology
- Abstract
Background: Evidence-practice gaps exist in urology. We previously surveyed European Association of Urology (EAU) guidelines for strong recommendations underpinned by high-certainty evidence that impact patient experience for which practice variations were suspected. The recommendation "Do not offer neoadjuvant androgen deprivation therapy (ADT) before surgery for patients with prostate cancer" was prioritised for further investigation. ADT before surgery is neither clinically effective nor cost effective and has serious side effects. The first step in improving implementation problems is to understand their extent. A clear picture of practice regarding ADT before surgery across Europe is not available., Objective: To assess current ADT use before prostate cancer surgery in Europe., Design, Setting, and Participants: This was an observational cross-sectional study. We retrospectively audited recent ADT practices in a multicentre international setting. We used nonprobability purposive sampling, aiming for breadth in terms of low- versus high-volume, academic, versus community and public versus private centres., Outcome Measurements and Statistical Analysis: Our primary outcome was adherence to the ADT recommendation. Descriptive statistics and a multilevel model were used to investigate differences between countries across different factors (volume, centre type, and funding type). Subgroup analyses were performed for patients with low, intermediate, and high risk, and for those with locally advanced prostate cancer. We also collected reasons for nonadherence., Results and Limitations: We included 6598 patients with prostate cancer from 187 hospitals in 31 countries from January 1, 2017 to May 1, 2020. Overall, nonadherence was 2%, (range 0-32%). Most of the variability was found in the high-risk subgroup, for which nonadherence was 4% (range 0-43%). Reasons for nonadherence included attempts to improve oncological outcomes or preoperative tumour parameters; attempts to control the cancer because of long waiting lists; and patient preference (changing one's mind from radiotherapy to surgery after neoadjuvant ADT had commenced or feeling that the side effects were intolerable). Although we purposively sampled for variety within countries (public/private, academic/community, high/low-volume), a selection bias toward centres with awareness of guidelines is possible, so adherence rates may be overestimated., Conclusions: EAU guidelines recommend against ADT use before prostate cancer surgery, yet some guideline-discordant ADT use remains at the cost of patient experience and an additional payer and provider burden. Strategies towards discontinuation of inappropriate preoperative ADT use should be pursued., Patient Summary: Androgen deprivation therapy (ADT) is sometimes used in men with prostate cancer who will not benefit from it. ADT causes side effects such as weight gain and emotional changes and increases the risk of cardiovascular disease, diabetes, and osteoporosis. Guidelines strongly recommend that men opting for surgery should not receive ADT, but it is unclear how well the guidance is followed. We asked urologists across Europe how patients in their institutions were treated over the past few years. Most do not use ADT before surgery, but this still happens in some places. More research is needed to help doctors to stop using ADT in patients who will not benefit from it., (Copyright © 2023 The Authors. Published by Elsevier B.V. All rights reserved.)
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- 2023
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38. European Association of Urology Guidelines on Male Urinary Incontinence.
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Gacci M, Sakalis VI, Karavitakis M, Cornu JN, Gratzke C, Herrmann TRW, Kyriazis I, Malde S, Mamoulakis C, Rieken M, Schouten N, Smith EJ, Speakman MJ, Tikkinen KAO, and Gravas S
- Subjects
- Aged, Humans, Male, Quality of Life, Urinary Incontinence, Urge diagnosis, Urinary Incontinence, Urge therapy, Urinary Incontinence diagnosis, Urinary Incontinence therapy, Urinary Incontinence, Stress diagnosis, Urinary Incontinence, Stress therapy, Urology
- Abstract
Context: Urinary incontinence (UI) is a common condition in elderly men causing a severe worsening of quality of life, and a significant cost for both patients and health systems., Objective: To report a practical, evidence-based, guideline on definitions, pathophysiology, diagnostic workup, and treatment options for men with different forms of UI., Evidence Acquisition: A comprehensive literature search, limited to studies representing high levels of evidence and published in the English language, was performed. Databases searched included Medline, EMBASE, and the Cochrane Libraries. A level of evidence and a grade of recommendation were assigned., Evidence Synthesis: UI can be classified into stress urinary incontinence (SUI), urge urinary incontinence (UUI), and mixed urinary incontinence. A detailed description of the pathophysiology and diagnostic workup has been reported. Simple clinical interventions, behavioural and physical modifications, and pharmacological treatments comprise the initial management for all kinds of UI. Surgery for SUI includes bulking agents, male sling, and compression devices. Surgery for UUI includes bladder wall injection of botulinum toxin A, sacral nerve stimulation, and cystoplasty/urinary diversion., Conclusions: This 2022 European Association of Urology guideline summary provides updated information on definition, pathophysiology, diagnosis, and treatment of male UI., Patient Summary: Male urinary incontinence comprises a broad subject area, much of which has been covered for the first time in the literature in a single manuscript. The European Association of Urology Non-neurogenic Male Lower Urinary Tract Symptoms Guideline Panel has released this new guidance, with the aim to provide updated information for urologists to be able to follow diagnostic and therapeutic indications for optimising patient care., (Copyright © 2022. Published by Elsevier B.V.)
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- 2022
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39. Prospective observational cohort study of reached protein and energy targets in general wards during the post-intensive care period: The PROSPECT-I study.
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Slingerland-Boot R, van der Heijden I, Schouten N, Driessen L, Meijer S, Mensink M, and van Zanten A
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- Cohort Studies, Critical Care methods, Critical Illness therapy, Energy Intake, Humans, Intensive Care Units, Length of Stay, Prospective Studies, Dietary Proteins, Patients' Rooms
- Abstract
Introduction: Nutrition plays an essential role in the recovery of critical illness. In the post-Intensive Care Unit (ICU) period, patients typically return to oral nutrition gradually. However, studies quantifying nutritional intake in the post-ICU hospitalization period are scarce and formal guidelines are lacking. This study aims to describe energy and protein intake in detail over the entire post-ICU hospitalization period and explore associations between protein intake and clinical outcomes., Methods: A prospective observational single-center cohort study was conducted amongst post-ICU patients in general wards after a minimum ICU-stay of 72 h and who received (par)enteral feeding for ≥24 h in the ICU. Oral intake was assessed daily using food order lines and digital photography of meal leftovers. Other data, including amounts of (par)enteral nutrition, were collected from electronic medical records. The primary outcome was to identify energy and protein intake, and reached targets, in the post-ICU period. In addition, length of hospital stay after ICU discharge, readmission and mortality rates were compared between patients meeting protein targets or not., Results: In total, 48 patients were included. Complete nutritional data of 34 patients were analyzed in the current study, adding up to a total number of 484 observational days, 1681 photos and 6634 food order lines. Inter-rater agreement was excellent (ICC 0.878). Overall mean energy and protein adequacy for all nutritional groups was 82.3% (SD 18.3) and 83.1% (SD 19.8). Only 51.2% of the study participants (n = 21) reached overall >90% of prescribed protein targets during their entire post-ICU ward stay. The lowest intake was seen in the patient group with exclusively oral intake (median protein adequacy 75.5%), whereas patients with (supplemental) enteral nutrition (EN) all met >90% of their protein targets. Prescribed targets were below recommendations, and prescribed calories and proteins were neither ordered nor consumed. Discontinuation of EN resulted in immediate marked drops in energy (44.1%) and protein intake (50.7%). Subsequently, patients needed up to six days to reach protein targets again. No differences in clinical outcomes were observed., Conclusion: Most patients did not meet energy and protein targets in the post-ICU hospitalization period. Nutrition performance was highly dependent on the route of nutrition and was lowest among patients with oral intake only (despite of food fortification strategies and/or oral nutritional supplements). The best intake was observed in patients receiving (supplemental) EN. However, cessation of EN posed an immediate nutritional risk. No differences in clinical outcomes were found in this study. Our findings stress the need for follow-up studies to close the gap with individualized nutritional support in the post-ICU period to reach protein and energy targets., Competing Interests: Conflict of interest Prof. Dr A.R.H. van Zanten reported receiving honoraria for advisory board meetings, lectures, research, and travel expenses from Baxter, Braun, Cardinal Health, Danone-Nutricia, Dim-3, Fresenius Kabi, Mermaid, Lyric, and Nestle-Novartis. The other authors have nothing to declare., (Copyright © 2022 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
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- 2022
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40. Dutch patients, caregivers and healthcare professionals generate first nationwide research agenda for juvenile idiopathic arthritis.
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Verwoerd A, Armbrust W, Cowan K, van den Berg L, de Boer J, Bookelman S, Britstra M, Cappon J, Certan M, Dedding C, van den Haspel K, Muller PH, Jongsma K, Lelieveld O, van Loosdregt J, Olsder W, Rocha J, Schatorjé E, Schouten N, Swart JF, Vastert S, Walter M, and Schoemaker CG
- Subjects
- Adolescent, Adult, Child, Child, Preschool, Humans, Middle Aged, Netherlands, Self Report, Young Adult, Arthritis, Juvenile therapy, Caregivers, Health Personnel
- Abstract
Background: Involving the end-users of scientific research (patients, carers and clinicians) in setting research priorities is important to formulate research questions that truly make a difference and are in tune with the needs of patients. We therefore aimed to generate a national research agenda for Juvenile Idiopathic Arthritis (JIA) together with patients, their caregivers and healthcare professionals through conducting a nationwide survey among these stakeholders., Methods: The James Lind Alliance method was used, tailored with additional focus groups held to involve younger patients. First, research questions were gathered through an online and hardcopy survey. The received questions that were in scope were summarised and a literature search was performed to verify that questions were unanswered. Questions were ranked in the interim survey, and the final top 10 was chosen during a prioritisation workshop., Results: Two hundred and seventy-eight respondents submitted 604 questions, of which 519 were in scope. Of these 604 questions, 81 were generated in the focus groups with younger children. The questions were summarised into 53 summary questions. An evidence checking process verified that all questions were unanswered. A total of 303 respondents prioritised the questions in the interim survey. Focus groups with children generated a top 5 of their most important questions. Combining this top 5 with the top 10s of patients, carers, and clinicians led to a top 21. Out of these, the top 10 research priorities were chosen during a final workshop. Research into pain and fatigue, personalised treatment strategies and aetiology were ranked high in the Top 10., Conclusions: Through this study, the top 10 research priorities for JIA of patients, their caregivers and clinicians were identified to inform researchers and research funders of the research topics that matter most to them. The top priority involves the treatment and mechanisms behind persisting pain and fatigue when the disease is in remission.
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- 2021
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41. Higher Recurrence Rate After Endoscopic Totally Extraperitoneal (TEP) Inguinal Hernia Repair With Ultrapro Lightweight Mesh: 5-Year Results of a Randomized Controlled Trial (TULP-trial).
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Roos MM, Bakker WJ, Schouten N, Voorbrood CEH, Clevers GJ, Verleisdonk EJ, Davids PH, and Burgmans JP
- Subjects
- Adult, Aged, Double-Blind Method, Follow-Up Studies, Herniorrhaphy methods, Humans, Kaplan-Meier Estimate, Logistic Models, Male, Middle Aged, Polypropylenes, Recurrence, Treatment Outcome, Hernia, Inguinal surgery, Herniorrhaphy instrumentation, Laparoscopy, Surgical Mesh
- Abstract
Objective: The aim of this study was to determine inguinal hernia recurrence rates 5 years after endoscopic totally extraperitoneal (TEP) inguinal hernia repair when either lightweight or heavyweight mesh was used., Background: Recurrence is an important complication of inguinal hernia surgery. Higher recurrence rates of Ultrapro lightweight meshes after TEP repair have been demonstrated, yet data regarding long-term follow-up are limited., Methods: From 2010 to 2012, 950 male adult patients with primary unilateral hernias were randomized to TEP hernia repair with heavyweight (Prolene) or lightweight (Ultrapro) mesh. Five years postoperatively, the validated PINQ-PHONE telephone questionnaire was carried out. Participants with a positive questionnaire reply were scheduled for a clinical visit. A recurrence was defined as a clinically detectable bulge in the operated groin on physical examination., Results: Data on development of recurrence could be obtained from 790 patients (83.2% 5-year follow-up rate). Four patients presented with a recurrence at the outpatient clinic between 2 and 5 years postoperatively. Thirty-five patients (4.6%) with a positive PINQ-PHONE reply (60.0% lightweight vs 40.0% heavyweight) were physically examined at the outpatient clinic. In 2 patients (lightweight) a recurrence was detected. The total 5-year recurrence rate after TEP hernia repair was 2.4% (3.8% lightweight, 1.1% heavyweight, P = 0.01). A significantly higher recurrence rate for lightweight mesh in primary direct hernias was found (P = 0.003)., Conclusions: The overall recurrence rate 5 years after TEP repair was low. Ultrapro lightweight meshes showed higher recurrence rates than heavyweight meshes and are not recommended for endoscopic TEP inguinal hernia repair.
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- 2018
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42. Long-term Results of a Randomized Double-blinded Prospective Trial of a Lightweight (Ultrapro) Versus a Heavyweight Mesh (Prolene) in Laparoscopic Total Extraperitoneal Inguinal Hernia Repair (TULP-trial).
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Burgmans JP, Voorbrood CE, Simmermacher RK, Schouten N, Smakman N, Clevers G, Davids PH, Verleisdonk EM, Hamaker ME, Lange JF, and van Dalen T
- Subjects
- Adult, Aged, Aged, 80 and over, Double-Blind Method, Humans, Male, Middle Aged, Pain Measurement, Pain, Postoperative prevention & control, Polypropylenes, Prospective Studies, Quality of Life, Recurrence, Treatment Outcome, Hernia, Inguinal surgery, Herniorrhaphy instrumentation, Laparoscopy, Surgical Mesh
- Abstract
Objective: The aim of the randomized clinical trial was to compare the 2 years of clinical outcomes of a lightweight (Ultrapro) vs a heavyweight (Prolene) mesh for laparoscopic total extraperitoneal (TEP) inguinal hernia repair., Background: Lightweight meshes reduce postoperative pain and stiffness in open anterior inguinal hernia repair. The discussion about a similar benefit for laparoscopic repair is ongoing, but concerns exist about higher recurrence rates., Methods: Between March 2010 and October 2012, male patients who presented with a primary, reducible unilateral inguinal hernia who underwent day-case TEP repair were eligible. Outcome parameters included chronic pain, recurrence, foreign body feeling, and quality of life scores., Results: During the study period, 950 patients were included. One year postoperatively the presence of relevant pain (Numeric Rating Score 4-10) was significantly higher in the lightweight mesh group (2.9%) compared with the heavyweight mesh group (0.7%) (P = 0.01), and after 2 years this difference remained significant (P = 0.03). There were 4 (0.8%) recurrent hernias in the heavyweight mesh group and 13 (2.7%) in the lightweight group (P = 0.03). No differences in foreign body feeling or quality of life scores were detected., Conclusions: In TEP hernia surgery, there was no benefit of lightweight over heavyweight meshes observed 2 years postoperatively.
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- 2016
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43. Mechanism, assessment, and incidence of male infertility after inguinal hernia surgery: a review of the preclinical and clinical literature.
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Tekatli H, Schouten N, van Dalen T, Burgmans I, and Smakman N
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- Animals, Hernia, Inguinal complications, Hernia, Inguinal physiopathology, Herniorrhaphy methods, Humans, Incidence, Infertility, Male pathology, Ischemia etiology, Male, Models, Animal, Orchitis etiology, Pain etiology, Spermatic Cord blood supply, Spermatic Cord injuries, Spermatic Cord physiopathology, Testis blood supply, Testis injuries, Testis physiopathology, Vas Deferens injuries, Vas Deferens physiopathology, Hernia, Inguinal surgery, Herniorrhaphy adverse effects, Infertility, Male etiology, Infertility, Male physiopathology, Surgical Mesh
- Abstract
Background: The treatment of inguinal hernia has changed considerably over the past 15 years. We reviewed the preclinical and clinical literature to find out the effect of inguinal hernia surgery on male fertility because it has been suggested that hernia surgery may impair testicular function and male fertility., Data Sources: A search on Embase, MEDLINE, and the Cochrane Library was performed to find related articles., Conclusions: Animal models show substantial effects of hernia repair on the structures in the spermatic cord, which is more pronounced in mesh repairs. Although the number of studies and the included numbers of patients were limited, clinical studies indicate that these potential adverse effects do not seem to have a clinical impact on male fertility in humans with inguinal hernias. Future clinical studies, preferably with bilateral patients, are necessary to investigate the clinical relevance of the effects of inguinal hernia and hernia surgery on male fertility., (Copyright © 2012 Elsevier Inc. All rights reserved.)
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- 2012
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44. The effect of ultrapro or prolene mesh on postoperative pain and well-being following endoscopic Totally Extraperitoneal (TEP) hernia repair (TULP): study protocol for a randomized controlled trial.
- Author
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Schouten N, van Dalen T, Smakman N, Elias SG, Clevers GJ, Verleisdonk EJ, Davids PH, and Burgmans IP
- Subjects
- Adult, Double-Blind Method, Equipment Design, Hernia, Inguinal psychology, Humans, Male, Netherlands, Pain Measurement, Pain, Postoperative diagnosis, Pain, Postoperative etiology, Pain, Postoperative psychology, Patient Satisfaction, Patient Selection, Prospective Studies, Recurrence, Severity of Illness Index, Surveys and Questionnaires, Time Factors, Treatment Outcome, Endoscopy adverse effects, Endoscopy instrumentation, Hernia, Inguinal surgery, Herniorrhaphy adverse effects, Herniorrhaphy instrumentation, Herniorrhaphy methods, Pain, Postoperative prevention & control, Polypropylenes, Quality of Life, Research Design, Surgical Mesh
- Abstract
Background: The purpose of this study was to describe the rationale and design of a randomized controlled trial analyzing the effects of mesh type (Ultrapro versus Prolene mesh) on postoperative pain and well-being following an endoscopic Totally Extraperitoneal (TEP) repair for inguinal hernias (short: TULP trial)., Methods and Design: The TULP trial is a prospective, two arm, double blind, randomized controlled trial to assess chronic postoperative pain and quality of life following implantation of a lightweight (Ultrapro) and heavyweight (Prolene) mesh in endoscopic TEP hernia repair. The setting is a high-volume single center hospital, specializing in TEP hernia repair. All patients are operated on by one of four surgeons. Adult male patients (≥18 years of age) with primary, reducible, unilateral inguinal hernias and no contraindications for TEP repair are eligible for inclusion in the study. The primary outcome is substantial chronic postoperative pain, defined as moderate to severe pain persisting ≥ 3 months postoperatively (Numerical Rating Scale, NRS 4-10). Secondary endpoints are the individual development of pain until three years after the TEP procedure, the quality of life (QoL), recurrence rate, patient satisfaction and complications., Discussion: Large prospective randomized controlled studies with a long follow-up evaluating the incidence of chronic postoperative pain following implantation of lightweight and heavyweight mesh in endoscopic (TEP) hernia repair are limited. By studying the presence of pain and quality of life, but also complications and recurrences in a large patient population, a complete efficiency and feasibility assessment of both mesh types in TEP hernia repair will be performed., Trial Registration: The TULP study is registered in the Dutch Trial Register (NTR2131).
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- 2012
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45. Male infertility after endoscopic Totally Extraperitoneal (Tep) hernia repair (Main): rationale and design of a prospective observational cohort study.
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Schouten N, van Dalen T, Smakman N, Elias SG, van de Water C, Spermon RJ, Mulder LS, and Burgmans IP
- Subjects
- Adolescent, Adult, Herniorrhaphy methods, Humans, Male, Middle Aged, Young Adult, Endoscopy, Hernia, Inguinal surgery, Herniorrhaphy adverse effects, Infertility, Male etiology, Surgical Mesh
- Abstract
Background: To describe the rationale and design of an observational cohort study analyzing the effects of endoscopic Totally Extraperitoneal (TEP) hernia repair on male fertility (MAIN study)., Methods and Design: The MAIN study is an observational cohort study designed to assess fertility after endoscopic TEP hernia repair. The setting is a high-volume single center hospital, specialized in TEP hernia repair. Male patients of 18-60 years of age, with primary, reducible, bilateral inguinal hernias and no contraindications for endoscopic TEP repair are eligible for inclusion in this study. Patients with an ASA-classification≥III and patients with recurrent and/or scrotal hernias and/or a medical history of pelvic surgery and/or radiotherapy, known fertility problems, diabetes and/or other diseases associated with a risk of fertility problems, will be excluded. The primary outcome is the testicular perfusion before and 6 months after TEP hernia repair (assessed by means of a scrotal ultrasonography). Secondary endpoints are the testicular volume (Ultrasound), semen quality and quantity and the endocrinological status, based on serum levels of the sexual hormones follicle-stimulating hormone (FSH), luteinizing hormone (LSH), testosterone and inhibin B before and 6 months after TEP hernia repair., Discussion: The use of polypropylene mesh is associated with a strong foreign body reaction which could play a role in chronic groin pain development. Since the mesh in (endoscopic) inguinal hernia repair is placed in close contact to the vas deferens and spermatic vessels, the mesh-induced inflammatory reaction could lead to a dysfunction of these structures. Relevant large and prospective clinical studies on the problem are limited. This study will provide a complete assessment of fertility in male patients who undergo simultaneous bilateral endoscopic TEP hernia repair, by analyzing testicular perfusion and volume, semen quantity and quality and endocrinological status before and 6 months after TEP repair., Trial Registration: The MAIN study is registered in the Dutch Trial Register (NTR2208).
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- 2012
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46. Temporary end ileostomy with subcutaneously buried efferent limb: results and potential advantages.
- Author
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van der Sluis FF, Schouten N, de Graaf PW, Karsten TM, and Stassen LP
- Subjects
- Anastomotic Leak, Female, Hernia, Humans, Ileus, Male, Middle Aged, Skin Diseases, Surgical Wound Dehiscence, Treatment Outcome, Wound Infection, Ileostomy adverse effects, Ileostomy methods, Ileum surgery
- Abstract
Purpose: To evaluate the results of a modified technique of creating a defunctioning end ileostomy., Methods: Medical records of all consecutive patients with a defunctioning end ileostomy with buried efferent limb operated at our hospital between January 2000 and December 2007 were reviewed. The defunctioning end ileostomy with buried efferent limb is created by closing the distal limb and positioning it in the subcutis. Parameters studied were: stomal and reversal related complications., Results: 66 patients were included. Between construction and closure of the stoma, a total of 21 patients (31.8%) developed stoma-related complications. In 1 patient (1.5%) high output occurred, in 6 (9%) stomal retraction and in 4 (6.1%) a parastomal hernia occurred. Peristomal skin problems were observed in 14 patients (21.2%) in the early postoperative period, decreasing to 6 patients (9.1%) after 3 weeks. In 1 patient, stoma closure could not be performed through a local approach and formal laparotomy was necessary. Complications of loop ileostomy as reported in the literature show relatively high rates of peristomal skin and leakage problems., Conclusions: Our results suggest that end ileostomy with subcutaneous buried efferent limb offers advantages over loop ileostomy with regard to the risk of developing peristomal skin and leakage problems., (Copyright © 2010 S. Karger AG, Basel.)
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- 2010
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47. Does the biocompatibility of the peritoneal dialysis solution matter in assessment of peritoneal function?
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Parikova A, Struijk DG, Zweers MM, Langedijk M, Schouten N, van den Berg N, Duis S, and Krediet RT
- Subjects
- Adult, Biological Transport, Body Fluids metabolism, Chromatography, Liquid, Creatinine metabolism, Female, Glucose metabolism, Humans, Hydrogen-Ion Concentration, Immunoenzyme Techniques, Male, Middle Aged, Permeability, Proteins metabolism, Sodium metabolism, Ultrafiltration, Urea metabolism, Uric Acid metabolism, Dialysis Solutions chemistry, Peritoneal Dialysis, Peritoneum metabolism
- Abstract
Background: Peritoneal function tests are performed in peritoneal dialysis (PD) patients to characterize peritoneal membrane status. A low pH/high glucose degradation product (GDP) dialysis solution is used as the test solution. The objective of the present study was to compare a 3.86% glucose, low pH/high GDP dialysis solution (pH 5.5) with a 3.86% glucose, normal pH/low GDP dialysis solution (pH 7.4) in assessments of peritoneal membrane function., Methods: Two standard peritoneal permeability analyses (SPA) were performed in 10 stable PD patients within 2 weeks. One SPA was done with the 3.86% low pH/high GDP solution, and the other with the 3.86% normal pH/low GDP solution. The sequence of the two tests was randomized., Results: Fluid transport parameters and glucose absorption were not different between the two groups. No differences were found for the mass transfer area coefficients (MTACs) of low molecular weight solutes calculated over the whole dwell. However, MTAC urea in the first hour of the dwell was higher in the test done with low pH/high GDP dialysate, suggesting more peritoneal vasodilation. No difference was found in protein clearances. Sodium sieving at multiple time points during the dwell was similar with the two solutions., Conclusion: The results obtained with the glucose-containing normal pH/low GDP dialysis solution were similar to those obtained with the glucose-containing low pH/high GDP dialysate in assessments of peritoneal membrane function.
- Published
- 2007
48. Selection and evaluation of adsorbents for the removal of anionic surfactants from laundry rinsing water.
- Author
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Schouten N, van der Ham LG, Euverink GJ, and de Haan AB
- Subjects
- Adsorption, Anions, Laundering, Surface-Active Agents isolation & purification, Water Pollutants, Chemical isolation & purification
- Abstract
Low-cost adsorbents were tested to remove anionic surfactants from laundry rinsing water to allow re-use of water. Adsorbents were selected corresponding to the different surfactant adsorption mechanisms. Equilibrium adsorption studies of linear alkyl benzene sulfonate (LAS) show that ionic interaction results in a high maximum adsorption capacity on positively charged adsorbents of 0.6-1.7 gLAS/g. Non-ionic interactions, such as hydrophobic interactions of LAS with non-ionic resins or activated carbons, result in a lower adsorption capacity of 0.02-0.6 gLAS/g. Negatively charged materials, such as cation exchange resins or bentonite clay, have negligible adsorption capacities for LAS. Similar results are obtained for alpha olefin sulfonate (AOS). Cost comparison of different adsorbents shows that an inorganic anion exchange material (layered double hydroxide) and activated carbons are the most cost-effective materials in terms of the amount of surfactant adsorbed per dollar worth of adsorbent.
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- 2007
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49. Analysis of the prevalence and causes of ultrafiltration failure during long-term peritoneal dialysis: a cross-sectional study.
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Smit W, Schouten N, van den Berg N, Langedijk MJ, Struijk DG, and Krediet RT
- Subjects
- Biological Transport, Cross-Sectional Studies, Female, Humans, Male, Middle Aged, Prevalence, Time Factors, Treatment Failure, Ultrafiltration, Kidney Failure, Chronic therapy, Peritoneal Dialysis
- Abstract
Background: Ultrafiltration failure (UFF) is a major complication of peritoneal dialysis (PD). It can occur at any stage of PD, but develops in time and is, therefore, especially important in long-term treatment. To investigate its prevalence and to identify possible causes, we performed a multicenter study in The Netherlands, where patients treated with PD for more than 4 years were studied using a peritoneal function test (standard peritoneal permeability analysis) with 3.86% glucose. UFF was defined as net UF < 400 mL after a 4-hour dwell., Results: 55 patients unselected for the presence or absence of UFF were analyzed. Mean age was 48 years (range 18 - 74 years); duration of PD ranged from 48 to 144 months (median 61 months); UFF was present in 20 patients (36%). Patients with and without UFF did not differ in age or duration of PD. Median values for patients with normal UF compared to patients with UFF were, for net UF 659 mL versus 120 mL (p < 0.01), transcapillary UF rate 3.8 versus 2.1 mL/ minute (p < 0.01), effective lymphatic absorption 1.0 versus 1.6 mL/min (p < 0.05), mass transfer area coefficient (MTAC) for creatinine 9.0 versus 12.9 mL/min (p< 0.01), dialysate-to-plasma ratio (D/P) for creatinine 0.71 versus 0.86 (p < 0.01), glucose absorption 60% versus 73% (p < 0.01), maximum dip in D/P sodium (as a measure of free water transport) 0.109 versus 0.032 (p < 0.01), and osmotic conductance to glucose 3.0 versus 2.1 microL/min/mmHg (p < 0.05). As causes for UFF, high MTAC creatinine, defined as > 12.5 mL/min, or a glucose absorption > 72%, both reflecting a large vascular surface, a lymphatic absorption rate (LAR) of > 2.14 mL/min, and a decreased dip in D/P sodium of < 0.046 were identified. Most patients had a combination of causes (12 patients), whereas there was only a decreased dip in D/P sodium in 3 patients, only high MTAC creatinine in 1 patient, and only high LAR in 2 patients. We could not identify a cause in 2 patients. Both groups had similar clearances of serum proteins and peritoneal restriction coefficients. However, dialysate cancer antigen 125 concentrations, reflecting mesothelial cell mass, were lower in the UFF patients (2.79 vs 5.38 U/L)., Conclusion: The prevalence of UFF is high in long-term PD. It is caused mainly by a large vascular surface area and by impaired channel-mediated water transport. In addition, these patients also had signs of a reduced mesothelial cell mass, indicating damage of the peritoneum on both vascular and mesothelial sites.
- Published
- 2004
50. Free-water transport in fast transport status: a comparison between CAPD peritonitis and long-term PD.
- Author
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Smit W, van den Berg N, Schouten N, Aikens E, Struijk DG, and Krediet RT
- Subjects
- Acute Disease, Adult, Aged, Chronic Disease, Dialysis Solutions pharmacokinetics, Humans, Middle Aged, Osmosis, Osmotic Pressure, Peritoneum metabolism, Ultrafiltration, Peritoneal Dialysis, Continuous Ambulatory adverse effects, Peritonitis etiology, Peritonitis metabolism, Water metabolism
- Abstract
Background: Ultrafiltration failure (UFF) in continuous ambulatory peritoneal dialysis (CAPD) is a transient phenomenon during acute peritonitis and a permanent complication in long-term peritoneal dialysis (PD). The high solute transport rates during acute peritonitis are probably caused by an increased number of perfused peritoneal capillaries. Long-term PD is associated with an increased number of peritoneal microvessels, leading to an enlargement of the anatomic vascular surface area. This leads to high mass transfer area coefficients (MTAC) and to UFF. Impaired conductance to glucose, leading to a reduction in free-water transport, may be a contributing factor to UFF in long-term PD. We hypothesized that UFF during acute peritonitis is, in the absence of permanent structural changes, only caused by an increased vascular surface area, while in long-term patients it is often the result of an increased surface area in combination with an impaired conductance to glucose. Therefore, the peritoneal transport parameters of patients with acute peritonitis were compared to those in long-term PD patients., Methods: A standard peritoneal permeability analysis (SPA) was done in 10 PD patients during the first 48 hours after the diagnosis of peritonitis. The results were compared to those obtained in 10 long-term PD patients matched for the MTAC creatinine. In addition, the results of 8 peritonitis patients were compared with SPA results of 8 recently started PD patients, matched for MTAC creatinine., Results: Peritonitis patients had a deeper maximal dip in D/P sodium, corrected for diffusion, than long-term patients (0.058 vs. 0.039, P < 0.05). Most parameters of peritoneal fluid transport were not different, except that t50 (i.e., the time to reach 50% of the maximum transcapillary ultrafiltration) was reached earlier during the dwell in peritonitis than in long-term PD-128 versus 175 minutes, P < 0.05. This confirmed the difference in the shape of the intraperitoneal volume versus time curve, which was blunted in the long-term patients. No differences were found for the parameters of solute transport between peritonitis patients and recently started patients., Conclusion: In contrast to patients with long-term PD, the osmotic conductance to glucose is unaffected in peritonitis, despite the lower net ultrafiltration caused by high solute transport. This implies that impaired free- water transport in chronic PD must be regarded as a contributing factor to UFF.
- Published
- 2004
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