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1. Editor's Choice – Nationwide Analysis of Patients Undergoing Iliac Artery Aneurysm Repair in the Netherlands

Author: Hamid Jalalzadeh, Reza Indrakusuma, Mark J.W. Koelemay, Ron Balm, L.H. Van den Akker, P.J. Van den Akker, G.J. Akkersdijk, G.P. Akkersdijk, W.L. Akkersdijk, M.G. van Andringa de Kempenaer, C.H. Arts, J.A. Avontuur, J.G. Baal, O.J. Bakker, R. Balm, W.B. Barendregt, M.H. Bender, B.L. Bendermacher, M. van den Berg, P. Berger, R.J. Beuk, J.D. Blankensteijn, R.J. Bleker, J.H. Bockel, M.E. Bodegom, K.E. Bogt, A.P. Boll, M.H. Booster, B.L. Borger van der Burg, G.J. de Borst, W.T. Bos-van Rossum, J. Bosma, J.M. Botman, L.H. Bouwman, J.C. Breek, V. Brehm, M.J. Brinckman, T.H. van den Broek, H.L. Brom, M.T. de Bruijn, J.L. de Bruin, P. Brummel, J.P. van Brussel, S.E. Buijk, M.G. Buimer, D.H. Burger, H.C. Buscher, G. den Butter, E. Cancrinus, P.H. Castenmiller, G. Cazander, H.M. Coveliers, P.H. Cuypers, J.H. Daemen, I. Dawson, A.F. Derom, A.R. Dijkema, J. Diks, M.K. Dinkelman, M. Dirven, D.E. Dolmans, R.C. van Doorn, L.M. van Dortmont, M.M. van der Eb, D. Eefting, G.J. van Eijck, J.W. Elshof, B.H. Elsman, A. van der Elst, M.I. van Engeland, R.G. van Eps, M.J. Faber, W.M. de Fijter, B. Fioole, W.M. Fritschy, R.H. Geelkerken, W.B. van Gent, G.J. Glade, B. Govaert, R.P. Groenendijk, H.G. de Groot, R.F. van den Haak, E.F. de Haan, G.F. Hajer, J.F. Hamming, E.S. van Hattum, C.E. Hazenberg, P.P. Hedeman Joosten, J.N. Helleman, L.G. van der Hem, J.M. Hendriks, J.A. van Herwaarden, J.M. Heyligers, J.W. Hinnen, R.J. Hissink, G.H. Ho, P.T. den Hoed, M.T. Hoedt, F. van Hoek, R. Hoencamp, W.H. Hoffmann, A.W. Hoksbergen, E.J. Hollander, L.C. Huisman, R.G. Hulsebos, K.M. Huntjens, M.M. Idu, M.J. Jacobs, M.F. van der Jagt, J.R. Jansbeken, R.J. Janssen, H.H. Jiang, S.C. de Jong, V. Jongkind, M.R. Kapma, B.P. Keller, A. Khodadade Jahrome, J.K. Kievit, P.L. Klemm, P. Klinkert, B. Knippenberg, N.A. Koedam, M.J. Koelemay, J.L. Kolkert, G.G. Koning, O.H. Koning, A.G. Krasznai, R.M. Krol, R.H. Kropman, R.R. Kruse, L. van der Laan, M.J. van der Laan, J.H. van Laanen, J.H. Lardenoye, J.A. Lawson, D.A. Legemate, V.J. Leijdekkers, M.S. Lemson, M.M. Lensvelt, M.A. Lijkwan, R.C. Lind, F.T. van der Linden, P.F. Liqui Lung, M.J. Loos, M.C. Loubert, D.E. Mahmoud, C.G. Manshanden, E.C. Mattens, R. Meerwaldt, B.M. Mees, R. Metz, R.C. Minnee, J.C. de Mol van Otterloo, F.L. Moll, Y.C. Montauban van Swijndregt, M.J. Morak, R.H. van de Mortel, W. Mulder, S.K. Nagesser, C.C. Naves, J.H. Nederhoed, A.M. Nevenzel-Putters, A.J. de Nie, D.H. Nieuwenhuis, J. Nieuwenhuizen, R.C. van Nieuwenhuizen, D. Nio, A.P. Oomen, B.I. Oranen, J. Oskam, H.W. Palamba, A.G. Peppelenbosch, A.S. van Petersen, T.F. Peterson, B.J. Petri, M.E. Pierie, A.J. Ploeg, R.A. Pol, E.D. Ponfoort, P.P. Poyck, A. Prent, S. ten Raa, J.T. Raymakers, M. Reichart, B.L. Reichmann, M.M. Reijnen, A. Rijbroek, M.J. van Rijn, R.A. de Roo, E.V. Rouwet, C.G. Rupert, B.R. Saleem, M.R. van Sambeek, M.G. Samyn, H.P. van ’t Sant, J. van Schaik, P.M. van Schaik, D.M. Scharn, M.R. Scheltinga, A. Schepers, P.M. Schlejen, F.J. Schlosser, F.P. Schol, O. Schouten, M.H. Schreinemacher, M.A. Schreve, G.W. Schurink, C.J. Sikkink, M.P. Siroen, A. te Slaa, H.J. Smeets, L. Smeets, A.A. de Smet, P. de Smit, P.C. Smit, T.M. Smits, M.G. Snoeijs, A.O. Sondakh, T.J. van der Steenhoven, S.M. van Sterkenburg, D.A. Stigter, H. Stigter, R.P. Strating, G.N. Stultiëns, J.E. Sybrandy, J.A. Teijink, B.J. Telgenkamp, M.J. Testroote, R.M. The, W.J. Thijsse, I.F. Tielliu, R.B. van Tongeren, R.J. Toorop, J.H. Tordoir, E. Tournoij, M. Truijers, K. Türkcan, R.P. Tutein Nolthenius, Ç. Ünlü, A.A. Vafi, A.C. Vahl, E.J. Veen, H.T. Veger, M.G. Veldman, H.J. Verhagen, B.A. Verhoeven, C.F. Vermeulen, E.G. Vermeulen, B.P. Vierhout, M.J. Visser, J.A. van der Vliet, C.J. Vlijmen - van Keulen, H.G. Voesten, R. Voorhoeve, A.W. Vos, B. de Vos, G.A. Vos, B.H. Vriens, P.W. Vriens, A.C. de Vries, J.P. de Vries, M. de Vries, C. van der Waal, E.J. Waasdorp, B.M. Wallis de Vries, L.A. van Walraven, J.L. van Wanroij, M.C. Warlé, V. van Weel, A.M. van Well, G.M. Welten, R.J. Welten, J.J. Wever, A.M. Wiersema, O.R. Wikkeling, W.I. Willaert, J. Wille, M.C. Willems, E.M. Willigendael, W. Wisselink, M.E. Witte, C.H. Wittens, I.C. Wolf-de Jonge, O. Yazar, C.J. Zeebregts, M.L. van Zeeland, Surgery, ACS - Atherosclerosis & ischemic syndromes, Pathology, VU University medical center, Pediatrics, Dermatology, ACS - Microcirculation, ACS - Diabetes & metabolism, Graduate School, 02 Surgical specialisms, Robotics and image-guided minimally-invasive surgery (ROBOTICS), Neurology, Erasmus MC other, Molecular Genetics, Erasmus School of Economics, Socio-Medical Sciences (SMS), Cell biology, Gynecological Oncology, Research & Education, Child and Adolescent Psychiatry / Psychology, Cardiology, Urology, Erasmus School of Health Policy & Management, Erasmus School of Social and Behavioural Sciences, Erasmus School of Law, Department of History, Department of Psychology, Education and Child Studies, Obstetrics & Gynecology, Department of Finance, General Practice, Applied Economics, Pediatric Surgery, Department of Business-Society Management, Commercial Law and Financial Law, Radiology & Nuclear Medicine, Business Economics, Neurosurgery, Public Health, Anesthesiology, Internal Medicine, Hematology, Intensive Care, Psychiatry, WP ESPhil, and Gastroenterology & Hepatology
Subjects: Male, medicine.medical_specialty, medicine.medical_treatment, Iliac Aneurysm/epidemiology, Patient characteristics, Netherlands/epidemiology, 030204 cardiovascular system & hematology, 030230 surgery, Iliac Artery/pathology, Endovascular aneurysm repair, Iliac Artery, 03 medical and health sciences, 0302 clinical medicine, Aneurysm, Sex Factors, medicine, 80 and over, Humans, EVAR, Registries, Iliac artery aneurysm, Aged, Netherlands, Retrospective Studies, Surgical repair, Aged, 80 and over, business.industry, Open repair, Endovascular Procedures, Retrospective cohort study, Guideline, Vascular surgery, medicine.disease, Guideline Adherence/statistics & numerical data, Surgery, Endovascular Procedures/methods, Aneurysm repair, Treatment Outcome, Iliac Aneurysm, Female, Guideline Adherence, Cardiology and Cardiovascular Medicine, business
Abstract: OBJECTIVE: The new 2019 guideline of the European Society for Vascular Surgery (ESVS) recommends consideration for elective iliac artery aneurysm (eIAA) repair when the iliac diameter exceeds 3.5 cm, as opposed to 3.0 cm previously. The current study assessed diameters at time of eIAA repair and ruptured IAA (rIAA) repair and compared clinical outcomes after open surgical repair (OSR) and endovascular aneurysm repair (EVAR).METHODS: This retrospective observational study used the nationwide Dutch Surgical Aneurysm Audit (DSAA) registry that includes all patients who undergo aorto-iliac aneurysm repair in the Netherlands. All patients who underwent primary IAA repair between 1 January 2014 and 1 January 2018 were included. Diameters at time of eIAA and rIAA repair were compared in a descriptive fashion. The anatomical location of the IAA was not registered in the registry. Patient characteristics and outcomes of OSR and EVAR were compared with appropriate statistical tests.RESULTS: The DSAA registry comprised 974 patients who underwent IAA repair. A total of 851 patients were included after exclusion of patients undergoing revision surgery and patients with missing essential variables. eIAA repair was carried out in 713 patients, rIAA repair in 102, and symptomatic IAA repair in 36. OSR was performed in 205, EVAR in 618, and hybrid repairs and conversions in 28. The median maximum IAA diameter at the time of eIAA and rIAA repair was 43 (IQR 38-50) mm and 68 (IQR 58-85) mm, respectively. Mortality was 1.3% (95% CI 0.7-2.4) after eIAA repair and 25.5% (95% CI 18.0-34.7) after rIAA repair. Mortality was not significantly different between the OSR and EVAR subgroups. Elective OSR was associated with significantly more complications than EVAR (intra-operative: 9.8% vs. 3.6%, post-operative: 34.0% vs. 13.8%, respectively).CONCLUSION: In the Netherlands, most eIAA repairs are performed at diameters larger than recommended by the ESVS guideline. These findings appear to support the recent increase in the threshold diameter for eIAA repair.
Published: 2020
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2. Toward Optimizing Risk Adjustment in the Dutch Surgical Aneurysm Audit

Author: Niki Lijftogt, Anco Vahl, Esmee M. van der Willik, Vanessa J. Leijdekkers, Michel W.J.M. Wouters, Jaap F. Hamming, L.H. Van den Akker, P.J. Van den Akker, G.J. Akkersdijk, G.P. Akkersdijk, W.L. Akkersdijk, M.G. van Andringa de Kempenaer, C.H. Arts, J.A. Avontuur, J.G. Baal, O.J. Bakker, R. Balm, W.B. Barendregt, M.H. Bender, B.L. Bendermacher, M. van den Berg, P. Berger, R.J. Beuk, J.D. Blankensteijn, R.J. Bleker, J.H. Bockel, M.E. Bodegom, K.E. Bogt, A.P. Boll, M.H. Booster, B.L. Borger van der Burg, G.J. de Borst, W.T. Bos-van Rossum, J. Bosma, J.M. Botman, L.H. Bouwman, J.C. Breek, V. Brehm, M.J. Brinckman, T.H. van den Broek, H.L. Brom, M.T. de Bruijn, J.L. de Bruin, P. Brummel, J.P. van Brussel, S.E. Buijk, M.G. Buimer, D.H. Burger, H.C. Buscher, G. den Butter, E. Cancrinus, P.H. Castenmiller, G. Cazander, H.M. Coveliers, P.H. Cuypers, J.H. Daemen, I. Dawson, A.F. Derom, A.R. Dijkema, J. Diks, M.K. Dinkelman, M. Dirven, D.E. Dolmans, R.C. van Doorn, L.M. van Dortmont, M.M. van der Eb, D. Eefting, G.J. van Eijck, J.W. Elshof, B.H. Elsman, A. van der Elst, M.I. van Engeland, R.G. van Eps, M.J. Faber, W.M. de Fijter, B. Fioole, W.M. Fritschy, R.H. Geelkerken, W.B. van Gent, G.J. Glade, B. Govaert, R.P. Groenendijk, H.G. de Groot, R.F. van den Haak, E.F. de Haan, G.F. Hajer, J.F. Hamming, E.S. van Hattum, C.E. Hazenberg, P.P. Hedeman Joosten, J.N. Helleman, L.G. van der Hem, J.M. Hendriks, J.A. van Herwaarden, J.M. Heyligers, J.W. Hinnen, R.J. Hissink, Ho GH, P.T. den Hoed, M.T. Hoedt, F. van Hoek, R. Hoencamp, W.H. Hoffmann, A.W. Hoksbergen, E.J. Hollander, L.C. Huisman, R.G. Hulsebos, K.M. Huntjens, M.M. Idu, M.J. Jacobs, M.F. van der Jagt, J.R. Jansbeken, R.J. Janssen, H.H. Jiang, S.C. de Jong, V. Jongkind, M.R. Kapma, B.P. Keller, A. Khodadade Jahrome, J.K. Kievit, P.L. Klemm, P. Klinkert, B. Knippenberg, N.A. Koedam, M.J. Koelemaij, J.L. Kolkert, G.G. Koning, O.H. Koning, A.G. Krasznai, R.M. Krol, R.H. Kropman, R.R. Kruse, L. van der Laan, M.J. van der Laan, J.H. van Laanen, J.H. Lardenoye, J.A. Lawson, D.A. Legemate, V.J. Leijdekkers, M.S. Lemson, M.M. Lensvelt, M.A. Lijkwan, R.C. Lind, F.T. van der Linden, P.F. Liqui Lung, M.J. Loos, M.C. Loubert, D.E. Mahmoud, C.G. Manshanden, E.C. Mattens, R. Meerwaldt, B.M. Mees, R. Metz, R.C. Minnee, J.C. de Mol van Otterloo, F.L. Moll, Y.C. Montauban van Swijndregt, M.J. Morak, R.H. van de Mortel, W. Mulder, S.K. Nagesser, C.C. Naves, J.H. Nederhoed, A.M. Nevenzel-Putters, A.J. de Nie, D.H. Nieuwenhuis, J. Nieuwenhuizen, R.C. van Nieuwenhuizen, D. Nio, A.P. Oomen, B.I. Oranen, J. Oskam, H.W. Palamba, A.G. Peppelenbosch, A.S. van Petersen, T.F. Peterson, B.J. Petri, M.E. Pierie, A.J. Ploeg, R.A. Pol, E.D. Ponfoort, P.P. Poyck, A. Prent, S. ten Raa, J.T. Raymakers, M. Reichart, B.L. Reichmann, M.M. Reijnen, A. Rijbroek, M.J. van Rijn, R.A. de Roo, E.V. Rouwet, C.G. Rupert, B.R. Saleem, M.R. van Sambeek, M.G. Samyn, H.P. van 't Sant, J. van Schaik, P.M. van Schaik, D.M. Scharn, M.R. Scheltinga, A. Schepers, P.M. Schlejen, F.J. Schlosser, F.P. Schol, O. Schouten, M.H. Schreinemacher, M.A. Schreve, G.W. Schurink, C.J. Sikkink, M.P. Siroen, A. te Slaa, H.J. Smeets, L. Smeets, A.A. de Smet, P. de Smit, P.C. Smit, T.M. Smits, M.G. Snoeijs, A.O. Sondakh, T.J. van der Steenhoven, S.M. van Sterkenburg, D.A. Stigter, H. Stigter, R.P. Strating, G.N. Stultiëns, J.E. Sybrandy, J.A. Teijink, B.J. Telgenkamp, M.J. Testroote, R.M. The, W.J. Thijsse, I.F. Tielliu, R.B. van Tongeren, R.J. Toorop, J.H. Tordoir, E. Tournoij, M. Truijers, K. Türkcan, R.P. Tutein Nolthenius, Ç. Ünlü, A.A. Vafi, A.C. Vahl, E.J. Veen, H.T. Veger, M.G. Veldman, H.J. Verhagen, B.A. Verhoeven, C.F. Vermeulen, E.G. Vermeulen, B.P. Vierhout, M.J. Visser, J.A. van der Vliet, C.J. Vlijmen - van Keulen, H.G. Voesten, R. Voorhoeve, A.W. Vos, B. de Vos, G.A. Vos, B.H. Vriens, Vriens PW, A.C. de Vries, J.P. de Vries, M. de Vries, C. van der Waal, E.J. Waasdorp, B.M. Wallis de Vries, L.A. van Walraven, J.L. van Wanroij, M.C. Warlé, V. van Weel, A.M. van Well, G.M. Welten, R.J. Welten, J.J. Wever, A.M. Wiersema, O.R. Wikkeling, W.I. Willaert, J. Wille, M.C. Willems, E.M. Willigendael, W. Wisselink, M.E. Witte, C.H. Wittens, I.C. Wolf-de Jonge, O. Yazar, C.J. Zeebregts, M.L. van Zeeland, Surgery, ACS - Atherosclerosis & ischemic syndromes, Multi-Modality Medical Imaging, Gastroenterology and hepatology, Pediatrics, Hematology laboratory, Obstetrics and gynaecology, Amsterdam Movement Sciences - Restoration and Development, Public and occupational health, AGEM - Digestive immunity, Amsterdam Reproduction & Development (AR&D), ACS - Microcirculation, ACS - Diabetes & metabolism, RS: CAPHRI - R5 - Optimising Patient Care, and Epidemiologie
Subjects: Male, medicine.medical_specialty, Time Factors, SURGERY, Aortic Rupture, UT-Hybrid-D, 030204 cardiovascular system & hematology, Logistic regression, Risk Assessment, Decision Support Techniques, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Predictive Value of Tests, Risk Factors, Electronic Health Records, Humans, Medicine, Prospective Studies, Registries, Prospective cohort study, Aged, Netherlands, Aged, 80 and over, ABDOMINAL AORTIC-ANEURYSM, Medical Audit, business.industry, MORTALITY, Glasgow Coma Scale, Reproducibility of Results, General Medicine, medicine.disease, Comorbidity, Abdominal aortic aneurysm, n/a OA procedure, ERA, MODEL, Treatment Outcome, Predictive value of tests, Emergency medicine, Female, Cardiology and Cardiovascular Medicine, business, Risk assessment, Vascular Surgical Procedures, Aortic Aneurysm, Abdominal, Abdominal surgery
Abstract: Background: To compare hospital outcomes of aortic aneurysm surgery, casemix correction for preoperative variables is essential. Most of these variables can be deduced from mortality risk prediction models. Our aim was to identify the optimal set of preoperative variables associated with mortality to establish a relevant and efficient casemix model.Methods: All patients prospectively registered between 2013 and 2016 in the Dutch Surgical Aneurysm Audit (DSAA) were included for the analysis. After multiple imputation for missing variables, predictors for mortality following univariable logistic regression were analyzed in a manual backward multivariable logistic regression model and compared with three standard mortality risk prediction models: Glasgow Aneurysm Score (GAS, mainly clinical parameters), Vascular Biochemical and Haematological Outcome Model (VBHOM, mainly laboratory parameters), and Dutch Aneurysm Score (DAS, both clinical and laboratory parameters). Discrimination and calibration were tested and considered good with a C-statistic > 0.8 and Hosmer-Lemeshow (H-L) P > 0.05.Results: There were 12,401 patients: 9,537 (76.9%) elective patients (EAAA), 913 (7.4%) acute symptomatic patients (SAAA), and 1,951 (15.7%) patients with acute rupture (RAAA). Overall postoperative mortality was 6.5%; 1.8% after EAAA surgery, 6.6% after SAAA, and 29.6% after RAAA surgery. The optimal set of independent variables associated with mortality was a mix of clinical and laboratory parameters: gender, age, pulmonary comorbidity, operative setting, creatinine, aneurysm size, hemoglobin, Glasgow coma scale, electrocardiography, and systolic blood pressure (C-statistic 0.871). External validation overall of VBHOM, DAS, and GAS revealed C-statistics of 0.836, 0.782, and 0.761, with an H-L of 0.028, 0.00, and 0.128, respectively.Conclusions: The optimal set of variables for casemix correction in the DSAA comprises both clinical and laboratory parameters, which can be collected easily from electronic patient files and will lead to an efficient casemix model.
Published: 2019
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3. Nationwide Study to Predict Colonic Ischemia after Abdominal Aortic Aneurysm Repair in The Netherlands

Author: Saskia Irene Willemsen, Martijn Geert ten Berge, Randolph George Statius van Eps, Hugo Thomas Christian Veger, Hans van Overhagen, Lukas Carolus van Dijk, Hein Putter, Jan Jacob Wever, L.H. Van den Akker, P.J. Van den Akker, G.J. Akkersdijk, G.P. Akkersdijk, W.L. Akkersdijk, M.G. van Andringa de Kempenaer, C.H. Arts, J.A. Avontuur, J.G. Baal, O.J. Bakker, R. Balm, W.B. Barendregt, M.H. Bender, B.L. Bendermacher, M. van den Berg, P. Berger, R.J. Beuk, J.D. Blankensteijn, R.J. Bleker, J.H. Bockel, M.E. Bodegom, K.E. Bogt, A.P. Boll, M.H. Booster, B.L. Borger van der Burg, G.J. de Borst, W.T. Bos-van Rossum, J. Bosma, J.M. Botman, L.H. Bouwman, J.C. Breek, V. Brehm, M.J. Brinckman, T.H. van den Broek, H.L. Brom, M.T. de Bruijn, J.L. de Bruin, P. Brummel, J.P. van Brussel, S.E. Buijk, M.G. Buimer, D.H. Burger, H.C. Buscher, G. den Butter, E. Cancrinus, P.H. Castenmiller, G. Cazander, H.M. Coveliers, P.H. Cuypers, J.H. Daemen, I. Dawson, A.F. Derom, A.R. Dijkema, J. Diks, M.K. Dinkelman, M. Dirven, D.E. Dolmans, R.C. van Doorn, L.M. van Dortmont, M.M. van der Eb, D. Eefting, G.J. van Eijck, J.W. Elshof, B.H. Elsman, A. van der Elst, M.I. van Engeland, R.G. van Eps, M.J. Faber, W.M. de Fijter, B. Fioole, W.M. Fritschy, R.H. Geelkerken, W.B. van Gent, G.J. Glade, B. Govaert, R.P. Groenendijk, H.G. de Groot, R.F. van den Haak, E.F. de Haan, G.F. Hajer, J.F. Hamming, E.S. van Hattum, C.E. Hazenberg, P.P. Hedeman Joosten, J.N. Helleman, L.G. van der Hem, J.M. Hendriks, J.A. van Herwaarden, J.M. Heyligers, J.W. Hinnen, R.J. Hissink, G.H. Ho, P.T. den Hoed, M.T. Hoedt, F. van Hoek, R. Hoencamp, W.H. Hoffmann, A.W. Hoksbergen, E.J. Hollander, L.C. Huisman, R.G. Hulsebos, K.M. Huntjens, M.M. Idu, M.J. Jacobs, M.F. van der Jagt, J.R. Jansbeken, R.J. Janssen, H.H. Jiang, S.C. de Jong, V. Jongkind, M.R. Kapma, B.P. Keller, A. Khodadade Jahrome, J.K. Kievit, P.L. Klemm, P. Klinkert, B. Knippenberg, N.A. Koedam, M.J. Koelemaij, J.L. Kolkert, G.G. Koning, O.H. Koning, A.G. Krasznai, R.M. Krol, R.H. Kropman, R.R. Kruse, L. van der Laan, M.J. van der Laan, J.H. van Laanen, J.H. Lardenoye, J.A. Lawson, D.A. Legemate, V.J. Leijdekkers, M.S. Lemson, M.M. Lensvelt, M.A. Lijkwan, R.C. Lind, F.T. van der Linden, P.F. Liqui Lung, M.J. Loos, M.C. Loubert, D.E. Mahmoud, C.G. Manshanden, E.C. Mattens, R. Meerwaldt, B.M. Mees, R. Metz, R.C. Minnee, J.C. de Mol van Otterloo, F.L. Moll, Y.C. Montauban van Swijndregt, M.J. Morak, R.H. van de Mortel, W. Mulder, S.K. Nagesser, C.C. Naves, J.H. Nederhoed, A.M. Nevenzel-Putters, A.J. de Nie, D.H. Nieuwenhuis, J. Nieuwenhuizen, R.C. van Nieuwenhuizen, D. Nio, A.P. Oomen, B.I. Oranen, J. Oskam, H.W. Palamba, A.G. Peppelenbosch, A.S. van Petersen, T.F. Peterson, B.J. Petri, M.E. Pierie, A.J. Ploeg, R.A. Pol, E.D. Ponfoort, P.P. Poyck, A. Prent, S. ten Raa, J.T. Raymakers, M. Reichart, B.L. Reichmann, M.M. Reijnen, A. Rijbroek, M.J. van Rijn, R.A. de Roo, E.V. Rouwet, C.G. Rupert, B.R. Saleem, M.R. van Sambeek, M.G. Samyn, H.P. van’t Sant, J. van Schaik, P.M. van Schaik, D.M. Scharn, M.R. Scheltinga, A. Schepers, P.M. Schlejen, F.J. Schlosser, F.P. Schol, O. Schouten, M.H. Schreinemacher, M.A. Schreve, G.W. Schurink, C.J. Sikkink, M.P. Siroen, A. te Slaa, H.J. Smeets, L. Smeets, A.A. de Smet, P. de Smit, P.C. Smit, T.M. Smits, M.G. Snoeijs, A.O. Sondakh, T.J. van der Steenhoven, S.M. van Sterkenburg, D.A. Stigter, H. Stigter, R.P. Strating, G.N. Stultiëns, J.E. Sybrandy, J.A. Teijink, B.J. Telgenkamp, M.J. Testroote, R.M. The, W.J. Thijsse, I.F. Tielliu, R.B. van Tongeren, R.J. Toorop, J.H. Tordoir, E. Tournoij, M. Truijers, K. Türkcan, R.P. Tutein Nolthenius, Ç. Ünlü, A.A. Vafi, A.C. Vahl, E.J. Veen, H.T. Veger, M.G. Veldman, H.J. Verhagen, B.A. Verhoeven, C.F. Vermeulen, E.G. Vermeulen, B.P. Vierhout, M.J. Visser, J.A. van der Vliet, C.J. Vlijmen-van Keulen, H.G. Voesten, R. Voorhoeve, A.W. Vos, B. de Vos, G.A. Vos, B.H. Vriens, P.W. Vriens, A.C. de Vries, J.P. de Vries, M. de Vries, C. van der Waal, E.J. Waasdorp, B.M. Wallis de Vries, L.A. van Walraven, J.L. van Wanroij, M.C. Warlé, V. van Weel, A.M. van Well, G.M. Welten, R.J. Welten, J.J. Wever, A.M. Wiersema, O.R. Wikkeling, W.I. Willaert, J. Wille, M.C. Willems, E.M. Willigendael, W. Wisselink, M.E. Witte, C.H. Wittens, I.C. Wolf-de Jonge, O. Yazar, C.J. Zeebregts, M.L. van Zeeland, TechMed Centre, Multi-Modality Medical Imaging, Technical Medicine, Surgery, ACS - Atherosclerosis & ischemic syndromes, Medical Biochemistry, ACS - Diabetes & metabolism, Amsterdam Gastroenterology Endocrinology Metabolism, APH - Methodology, and APH - Quality of Care
Subjects: Male, Time Factors, medicine.medical_treatment, Vascular damage Radboud Institute for Health Sciences [Radboudumc 16], 030204 cardiovascular system & hematology, Logistic regression, Endovascular aneurysm repair, 030218 nuclear medicine & medical imaging, 0302 clinical medicine, Risk Factors, Colon/blood supply, 80 and over, Medicine, Aortic Aneurysm, Abdominal/surgery, Netherlands, Aged, 80 and over, Univariate analysis, education.field_of_study, Endovascular Procedures, General Medicine, Middle Aged, Abdominal aortic aneurysm, Aortic Aneurysm, Treatment Outcome, Elective Surgical Procedures, Cardiology, Female, Cardiology and Cardiovascular Medicine, Cohort study, medicine.medical_specialty, Colon, Population, Mesenteric Ischemia/diagnosis, Risk Assessment, 03 medical and health sciences, Blood Vessel Prosthesis Implantation, Aneurysm, Internal medicine, Humans, Endovascular Procedures/adverse effects, cardiovascular diseases, Blood Vessel Prosthesis Implantation/adverse effects, education, Aged, Retrospective Studies, business.industry, Colonic ischemia, Abdominal/surgery, medicine.disease, Mesenteric Ischemia, Surgery, Emergencies, business, Aortic Aneurysm, Abdominal
Abstract: BACKGROUND: Colonic ischemia remains a severe complication after abdominal aortic aneurysm (AAA) repair and is associated with a high mortality. With open repair being one of the main risk factors of colonic ischemia, deciding between endovascular or open aneurysm repair should be based on tailor-made medicine. This study aims to identify high-risk patients of colonic ischemia, a risk that can be taken into account while deciding on AAA treatment strategy.METHODS: A nationwide population-based cohort study of 9,433 patients who underwent an AAA operation between 2014 and 2016 was conducted. Potential risk factors were determined by reviewing prior studies and univariate analysis. With logistic regression analysis, independent predictors of intestinal ischemia were established. These variables were used to form a prediction model.RESULTS: Intestinal ischemia occurred in 267 patients (2.8%). Occurrence of intestinal ischemia was seen significantly more in open repair versus endovascular aneurysm repair (7.6% vs. 0.9%; P < 0.001). This difference remained significant after stratification by urgency of the procedure, in both intact open (4.2% vs. 0.4%; P < 0.001) and ruptured open repair (15.0% vs. 6.2%); P < 0.001). Rupture of the AAA was the most important predictor of developing intestinal ischemia (odds ratio [OR], 5.9, 95% confidence interval [CI] 4.4-8.0), followed by having a suprarenal AAA (OR 3.4; CI 1.1-10.6). Associated procedural factors were open repair (OR 2.8; 95% CI 1.9-4.2), blood loss >1L (OR 3.6; 95% CI 1.7-7.5), and prolonged operating time (OR 2.0; 95% CI 1.4-2.8). Patient characteristics included having peripheral arterial disease (OR 2.4; 95% CI 1.3-4.4), female gender (OR 1.7; 95% CI 1.2-2.4), renal insufficiency (OR 1.7; 1.3-2.2), and pulmonary history (OR 1.6; 95% CI 1.2-2.2). Age CONCLUSIONS: One of the main risk factors is open repair. Several other risk factors can contribute to developing colonic ischemia after AAA repair. The proposed prediction model can be used to identify patients at high risk for developing colonic ischemia. With the current trend in AAA repair leaning toward open repair for better long-term results, our prediction model allows a better informed decision can be made in AAA treatment strategy.
Published: 2021

4. National Numbers of Secondary Aortic Reinterventions after Primary Abdominal Aortic Aneurysm Surgery from the Dutch Surgical Aneurysm Audit

Author: Eleonora G. Karthaus, Anco Vahl, Bernard H.P. Elsman, Michel W.J.M. Wouters, Gert J. de Borst, Jaap F. Hamming, P.J. Van den Akker, G.J. Akkersdijk, G.P. Akkersdijk, W.L. Akkersdijk, M.G. van Andringa de Kempenaer, C.H. Arts, J.A. Avontuur, O.J. Bakker, R. Balm, W.B. Barendregt, J.A. Bekken, M.H. Bender, B.L. Bendermacher, M. van den Berg, P. Berger, R.J. Beuk, J.D. Blankensteijn, R.J. Bleker, J.J. Blok, A.S. Bode, M.E. Bodegom, K.E. van der Bogt, A.P. Boll, M.H. Booster, B.L. Borger van der Burg, G.J. de Borst, W.T. Bos-van Rossum, J. Bosma, J.M. Botman, L.H. Bouwman, V. Brehm, M.T. de Bruijn, J.L. de Bruin, P. Brummel, J.P. van Brussel, S.E. Buijk, M.A. Buijs, M.G. Buimer, D.H. Burger, H.C. Buscher, E. Cancrinus, P.H. Castenmiller, G. Cazander, A.M. Coester, P.H. Cuypers, J.H. Daemen, I. Dawson, J.E. Dierikx, M.L. Dijkstra, J. Diks, M.K. Dinkelman, M. Dirven, D.E. Dolmans, R.C. van Doorn, L.M. van Dortmont, J.W. Drouven, M.M. van der Eb, D. Eefting, G.J. van Eijck, J.W. Elshof, B.H. Elsman, A. van der Elst, M.I. van Engeland, R.G. van Eps, M.J. Faber, W.M. de Fijter, B. Fioole, T.M. Fokkema, F.A. Frans, W.M. Fritschy, P.H. Fung Kon Jin, R.H. Geelkerken, W.B. van Gent, G.J. Glade, B. Govaert, R.P. Groenendijk, H.G. de Groot, R.F. van den Haak, E.F. de Haan, G.F. Hajer, J.F. Hamming, E.S. van Hattum, C.E. Hazenberg, P.P. Hedeman Joosten, J.N. Helleman, L.G. van der Hem, J.M. Hendriks, J.A. van Herwaarden, J.M. Heyligers, J.W. Hinnen, R.J. Hissink, G.H. Ho, P.T. den Hoed, M.T. Hoedt, F. van Hoek, R. Hoencamp, W.H. Hoffmann, W. Hogendoorn, A.W. Hoksbergen, E.J. Hollander, M. Hommes, C.J. Hopmans, L.C. Huisman, R.G. Hulsebos, K.M. Huntjens, M.M. Idu, M.J. Jacobs, M.F. van der Jagt, J.R. Jansbeken, R.J. Janssen, H.H. Jiang, S.C. de Jong, T.A. Jongbloed-Winkel, V. Jongkind, M.R. Kapma, B.P. Keller, A. Khodadade Jahrome, J.K. Kievit, P.L. Klemm, P. Klinkert, N.A. Koedam, M.J. Koelemaij, J.L. Kolkert, G.G. Koning, O.H. Koning, R. Konings, A.G. Krasznai, R.M. Krol, R.H. Kropman, R.R. Kruse, L. van der Laan, M.J. van der Laan, J.H. van Laanen, G.W. van Lammeren, D.A. Lamprou, J.H. Lardenoye, G.J. Lauret, B.J. Leenders, D.A. Legemate, V.J. Leijdekkers, M.S. Lemson, M.M. Lensvelt, M.A. Lijkwan, R.C. Lind, F.T. van der Linden, P.F. Liqui Lung, M.J. Loos, M.C. Loubert, K.M. van de Luijtgaarden, D.E. Mahmoud, C.G. Manshanden, E.C. Mattens, R. Meerwaldt, B.M. Mees, G.C. von Meijenfeldt, T.P. Menting, R. Metz, R.C. Minnee, J.C. de Mol van Otterloo, M.J. Molegraaf, Y.C. Montauban van Swijndregt, M.J. Morak, R.H. van de Mortel, W. Mulder, S.K. Nagesser, C.C. Naves, J.H. Nederhoed, A.M. Nevenzel-Putters, A.J. de Nie, D.H. Nieuwenhuis, J. Nieuwenhuizen, R.C. van Nieuwenhuizen, D. Nio, V.J. Noyez, A.P. Oomen, B.I. Oranen, J. Oskam, H.W. Palamba, A.G. Peppelenbosch, A.S. van Petersen, B.J. Petri, M.E. Pierie, A.J. Ploeg, R.A. Pol, E.D. Ponfoort, I.C. Post, P.P. Poyck, A. Prent, S. ten Raa, J.T. Raymakers, M. Reichart, B.L. Reichmann, M.M. Reijnen, J.A. de Ridder, A. Rijbroek, M.J. van Rijn, R.A. de Roo, E.V. Rouwet, B.R. Saleem, P.B. Salemans, M.R. van Sambeek, M.G. Samyn, H.P. van't Sant, J. van Schaik, P.M. van Schaik, D.M. Scharn, M.R. Scheltinga, A. Schepers, P.M. Schlejen, F.J. Schlosser, F.P. Schol, V.P. Scholtes, O. Schouten, M.A. Schreve, G.W. Schurink, C.J. Sikkink, A. te Slaa, H.J. Smeets, L. Smeets, R.R. Smeets, A.A. de Smet, P.C. Smit, T.M. Smits, M.G. Snoeijs, A.O. Sondakh, M.J. Speijers, T.J. van der Steenhoven, S.M. van Sterkenburg, D.A. Stigter, R.A. Stokmans, R.P. Strating, G.N. Stultiëns, J.E. Sybrandy, J.A. Teijink, B.J. Telgenkamp, M. Teraa, M.J. Testroote, T. Tha-In, R.M. The, W.J. Thijsse, I. Thomassen, I.F. Tielliu, R.B. van Tongeren, R.J. Toorop, E. Tournoij, M. Truijers, K. Türkcan, R.P. Tutein Nolthenius, Ç. Ünlü, R.H. Vaes, A.A. Vafi, A.C. Vahl, E.J. Veen, H.T. Veger, M.G. Veldman, S. Velthuis, H.J. Verhagen, B.A. Verhoeven, C.F. Vermeulen, E.G. Vermeulen, B.P. Vierhout, R.J. van der Vijver-Coppen, M.J. Visser, J.A. van der Vliet, C.J. Vlijmen-van Keulen, R. Voorhoeve, J.R. van der Vorst, A.W. Vos, B. de Vos, C.G. Vos, G.A. Vos, M.T. Voute, B.H. Vriens, P.W. Vriens, A.C. de Vries, D.K. de Vries, J.P. de Vries, M. de Vries, C. van der Waal, E.J. Waasdorp, W. de Vries, L.A. van Walraven, J.L. van Wanroij, M.C. Warlé, W. van de Water, V. van Weel, A.M. van Well, G.M. Welten, R.J. Welten, J.J. Wever, A.M. Wiersema, O.R. Wikkeling, W.I. Willaert, J. Wille, M.C. Willems, E.M. Willigendael, E.D. Wilschut, W. Wisselink, M.E. Witte, C.H. Wittens, C.Y. Wong, R. Wouda, O. Yazar, K.K. Yeung, C.J. Zeebregts, M.L. van Zeeland, Surgery, ACS - Atherosclerosis & ischemic syndromes, Pathology, VU University medical center, Pediatrics, Dermatology, ACS - Microcirculation, ACS - Diabetes & metabolism, Amsterdam Gastroenterology Endocrinology Metabolism, Multi-Modality Medical Imaging, Technical Medicine, RS: CAPHRI - R5 - Optimising Patient Care, and Epidemiologie
Subjects: Male, Time Factors, medicine.medical_treatment, Vascular damage Radboud Institute for Health Sciences [Radboudumc 16], UT-Hybrid-D, EVAR TRIAL 1, OPEN REPAIR, 030204 cardiovascular system & hematology, Endovascular aneurysm repair, 030218 nuclear medicine & medical imaging, Postoperative Complications, 0302 clinical medicine, LONG-TERM OUTCOMES, Risk Factors, FAILURE, Registries, skin and connective tissue diseases, Netherlands, Aged, 80 and over, Medical Audit, Endovascular Procedures, General Medicine, EDITORS CHOICE, Abdominal aortic aneurysm, Treatment Outcome, Cohort, cardiovascular system, INSTRUCTIONS, Female, Cardiology and Cardiovascular Medicine, Reoperation, medicine.medical_specialty, Blood Vessel Prosthesis Implantation, 03 medical and health sciences, Aneurysm, medicine, Humans, Aged, Surgical repair, business.industry, MORTALITY, fungi, Stent, ENDOVASCULAR REPAIR, Odds ratio, medicine.disease, Confidence interval, Surgery, body regions, business, SYSTEM, Aortic Aneurysm, Abdominal
Abstract: Contains fulltext : 226469.pdf (Publisher’s version ) (Open Access) BACKGROUND: Long-term secondary aortic reinterventions (SARs) can be a sign of (lack of) effectiveness of abdominal aortic aneurysm (AAA) surgery. This study provides insight into the national number of SARs after primary AAA repair by endovascular aneurysm repair (EVAR) or by open surgical repair in the Netherlands. METHODS: Observational study included all patients undergoing SAR between 2016 and 2017, registered in the compulsory Dutch Surgical Aneurysm Audit (DSAA). The DSAA started in 2013, SARs are registered from 2016. Characteristics of SAR and postoperative outcomes (mortality/complications) were analyzed, stratified by urgency of SAR. Data of SARs were merged with data of their preceded primary AAA repair, registered in the DSAA after January 2013. In these patients undergoing SAR, treatment characteristics of the preceded primary AAA repair were additionally described, with focus on differences between stent grafts. RESULTS: Between 2016 and 2017, 691 patients underwent SAR, this concerned 9.3% of all AAA procedures (infrarenal/juxtarenal/suprarenal) in the Netherlands (77% elective/11% acute symptomatic/12% ruptured). Endoleak (60%) was the most frequent indication for SAR. SARs were performed with EVAR in 66%. Postoperative mortalities after SAR were 3.4%, 11%, and 29% in elective, acute symptomatic, and ruptured patients, respectively. In 26% (n = 181) of the patients undergoing SAR their primary AAA repair was performed after January 2013 and data of primary and SAR procedures could be merged. In 93% (n = 136), primary AAA repair was EVAR. Endografts primarily used were nitinol/polyester (62%), nitinol/polytetrafluoroethylene (8%), endovascular sealing (21%), and others (9%), compared with their national market share of 76% (odds ratio [OR], 0.52; 95% confidence interval [CI], 0.38-0.71), 15% (OR, 0.50; CI, 0.29-0.89), 4.9% (OR, 5.04; CI, 3.44-7.38), and 4.1% (OR, 2.81; CI, 1.66-4.74), respectively. CONCLUSIONS: In the Netherlands, about one-tenth of the annual AAA procedures concerns an SAR. A quarter of this cohort had an SAR within 1-5 years after their primary AAA repair. Most SARs followed after primary EVAR procedures, in which an overrepresentation of endovascular sealing grafts was seen. Postoperative mortality after SAR is comparable with primary AAA repair.
Published: 2020
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5. A Composite Measure for Quality of Care in Patients with Symptomatic Carotid Stenosis Using Textbook Outcome

Author: Laurien S. Kuhrij, Eleonora G. Karthaus, Anco C. Vahl, Martine C.M. Willems, Jan W. Elshof, Gert J. de Borst, P.J. Van den Akker, G.J. Akkersdijk, G.P. Akkersdijk, W.L. Akkersdijk, M.G. van Andringa de Kempenaer, C.H. Arts, J.A. Avontuur, O.J. Bakker, R. Balm, W.B. Barendregt, J.A. Bekken, M.H. Bender, B.L. Bendermacher, M. van den Berg, P. Berger, R.J. Beuk, J.D. Blankensteijn, R.J. Bleker, J.J. Blok, A.S. Bode, M.E. Bodegom, K.E. van der Bogt, A.P. Boll, M.H. Booster, B.L. Borger van der Burg, G.J. de Borst, W.T. Bos-van Rossum, J. Bosma, J.M. Botman, L.H. Bouwman, V. Brehm, M.T. de Bruijn, J.L. de Bruin, P. Brummel, J.P. van Brussel, S.E. Buijk, M.A. Buijs, M.G. Buimer, D.H. Burger, H.C. Buscher, E. Cancrinus, P.H. Castenmiller, G. Cazander, A.M. Coester, P.H. Cuypers, J.H. Daemen, I. Dawson, J.E. Dierikx, M.L. Dijkstra, J. Diks, M.K. Dinkelman, M. Dirven, D.E. Dolmans, R.C. van Doorn, L.M. van Dortmont, J.W. Drouven, M.M. van der Eb, D. Eefting, G.J. van Eijck, J.W. Elshof, B.H. Elsman, A. van der Elst, M.I. van Engeland, R.G. van Eps, M.J. Faber, W.M. de Fijter, B. Fioole, T.M. Fokkema, F.A. Frans, W.M. Fritschy, P.H. Fung Kon Jin, R.H. Geelkerken, W.B. van Gent, G.J. Glade, B. Govaert, R.P. Groenendijk, H.G. de Groot, R.F. van den Haak, E.F. de Haan, G.F. Hajer, J.F. Hamming, E.S. van Hattum, C.E. Hazenberg, P.P. Hedeman Joosten, J.N. Helleman, L.G. van der Hem, J.M. Hendriks, J.A. van Herwaarden, J.M. Heyligers, J.W. Hinnen, R.J. Hissink, G.H. Ho, P.T. den Hoed, M.T. Hoedt, F. van Hoek, R. Hoencamp, W.H. Hoffmann, W. Hogendoorn, A.W. Hoksbergen, E.J. Hollander, M. Hommes, C.J. Hopmans, L.C. Huisman, R.G. Hulsebos, K.M. Huntjens, M.M. Idu, M.J. Jacobs, M.F. van der Jagt, J.R. Jansbeken, R.J. Janssen, H.H. Jiang, S.C. de Jong, T.A. Jongbloed-Winkel, V. Jongkind, M.R. Kapma, B.P. Keller, A. Khodadade Jahrome, J.K. Kievit, P.L. Klemm, P. Klinkert, N.A. Koedam, M.J. Koelemaij, J.L. Kolkert, G.G. Koning, O.H. Koning, R. Konings, A.G. Krasznai, R.M. Krol, R.H. Kropman, R.R. Kruse, L. van der Laan, M.J. van der Laan, J.H. van Laanen, G.W. van Lammeren, D.A. Lamprou, J.H. Lardenoye, G.J. Lauret, B.J. Leenders, D.A. Legemate, V.J. Leijdekkers, M.S. Lemson, M.M. Lensvelt, M.A. Lijkwan, R.C. Lind, F.T. van der Linden, P.F. Liqui Lung, M.J. Loos, M.C. Loubert, K.M. van de Luijtgaarden, D.E. Mahmoud, C.G. Manshanden, E.C. Mattens, R. Meerwaldt, B.M. Mees, G.C. von Meijenfeldt, T.P. Menting, R. Metz, R.C. Minnee, J.C. de Mol van Otterloo, M.J. Molegraaf, Y.C. Montauban van Swijndregt, M.J. Morak, R.H. van de Mortel, W. Mulder, S.K. Nagesser, C.C. Naves, J.H. Nederhoed, A.M. Nevenzel-Putters, A.J. de Nie, D.H. Nieuwenhuis, J. Nieuwenhuizen, R.C. van Nieuwenhuizen, D. Nio, V.J. Noyez, A.P. Oomen, B.I. Oranen, J. Oskam, H.W. Palamba, A.G. Peppelenbosch, A.S. van Petersen, B.J. Petri, M.E. Pierie, A.J. Ploeg, R.A. Pol, E.D. Ponfoort, I.C. Post, P.P. Poyck, A. Prent, S. ten Raa, J.T. Raymakers, M. Reichart, B.L. Reichmann, M.M. Reijnen, J.A. de Ridder, A. Rijbroek, M.J. van Rijn, R.A. de Roo, E.V. Rouwet, B.R. Saleem, P.B. Salemans, M.R. van Sambeek, M.G. Samyn, H.P. van ’t Sant, J. van Schaik, P.M. van Schaik, D.M. Scharn, M.R. Scheltinga, A. Schepers, P.M. Schlejen, F.J. Schlosser, F.P. Schol, V.P. Scholtes, O. Schouten, M.A. Schreve, G.W. Schurink, C.J. Sikkink, A. te Slaa, H.J. Smeets, L. Smeets, R.R. Smeets, A.A. de Smet, P.C. Smit, T.M. Smits, M.G. Snoeijs, A.O. Sondakh, M.J. Speijers, T.J. van der Steenhoven, S.M. van Sterkenburg, D.A. Stigter, R.A. Stokmans, R.P. Strating, G.N. Stultiëns, J.E. Sybrandy, J.A. Teijink, B.J. Telgenkamp, M. Teraa, M.J. Testroote, T. Tha-In, R.M. The, W.J. Thijsse, I. Thomassen, I.F. Tielliu, R.B. van Tongeren, R.J. Toorop, E. Tournoij, M. Truijers, K. Türkcan, R.P. Tutein Nolthenius, Ç. Ünlü, R.H. Vaes, A.A. Vafi, A.C. Vahl, E.J. Veen, H.T. Veger, M.G. Veldman, S. Velthuis, H.J. Verhagen, B.A. Verhoeven, C.F. Vermeulen, E.G. Vermeulen, B.P. Vierhout, R.J. van der Vijver-Coppen, M.J. Visser, J.A. van der Vliet, C.J. Vlijmen - van Keulen, R. Voorhoeve, J.R. van der Vorst, A.W. Vos, B. de Vos, C.G. Vos, G.A. Vos, M.T. Voute, B.H. Vriens, P.W. Vriens, A.C. de Vries, D.K. de Vries, J.P. de Vries, M. de Vries, C. van der Waal, E.J. Waasdorp, B.M. Wallis de Vries, L.A. van Walraven, J.L. van Wanroij, M.C. Warlé, W. van de Water, V. van Weel, A.M. van Well, G.M. Welten, R.J. Welten, J.J. Wever, A.M. Wiersema, O.R. Wikkeling, W.I. Willaert, J. Wille, M.C. Willems, E.M. Willigendael, E.D. Wilschut, W. Wisselink, M.E. Witte, C.H. Wittens, C.Y. Wong, R. Wouda, O. Yazar, K.K. Yeung, C.J. Zeebregts, M.L. van Zeeland, Surgery, ACS - Atherosclerosis & ischemic syndromes, Pathology, VU University medical center, Pediatrics, ACS - Microcirculation, ACS - Diabetes & metabolism, Multi-Modality Medical Imaging, Technical Medicine, RS: CAPHRI - R5 - Optimising Patient Care, Epidemiologie, Graduate School, ANS - Neurovascular Disorders, APH - Methodology, and APH - Quality of Care
Subjects: Male, Time Factors, medicine.medical_treatment, Vascular damage Radboud Institute for Health Sciences [Radboudumc 16], Psychological intervention, UT-Hybrid-D, Carotid endarterectomy, 030204 cardiovascular system & hematology, 030230 surgery, Logistic regression, 0302 clinical medicine, Risk Factors, Carotid Stenosis, Registries, Stroke, Netherlands, Outcome, Aged, 80 and over, RISK, Endarterectomy, Carotid, ENDARTERECTOMY, Middle Aged, Outcome and Process Assessment, Health Care, Treatment Outcome, Ischemic Attack, Transient, Female, Cardiology and Cardiovascular Medicine, medicine.medical_specialty, Funnel plot, Postoperative Hemorrhage, Patient Readmission, 03 medical and health sciences, Case mix index, Internal medicine, medicine, Humans, HOSPITAL QUALITY, Healthcare Disparities, Aged, Quality Indicators, Health Care, business.industry, Quality of care, 22/2 OA procedure, Length of Stay, medicine.disease, Comorbidity, Cranial Nerve Diseases, Stenosis, Surgery, business
Abstract: Contains fulltext : 226467.pdf (Publisher’s version ) (Closed access) OBJECTIVE: Composite measures may better objectify hospital performance than individual outcome measures (IOM). Textbook outcome (TO) is an outcome measure achieved for an individual patient when all undesirable outcomes are absent. The aim of this study was to assess TO as an additional outcome measure to evaluate quality of care in symptomatic patients treated by carotid endarterectomy (CEA). METHODS: All symptomatic patients treated by CEA in 2018, registered in the Dutch Audit for Carotid Interventions, were included. TO was defined as a composite of the absence of 30 day mortality, neurological events (any stroke or transient ischaemic attack [TIA]), cranial nerve deficit, haemorrhage, 30 day readmission, prolonged length of stay (LOS; > 5 days) and any other surgical complication. Multivariable logistic regression was used to identify covariables associated with achieving TO, which were used for casemix adjustment for hospital comparison. For each hospital, an observed vs. expected number of events ratio (O/E ratio) was calculated and plotted in a funnel plot with 95% control limits. RESULTS: In total, 70.7% of patients had a desired outcome within 30 days after CEA and therefore achieved TO. Prolonged LOS was the most common parameter (85%) and mortality the least common (1.1%) for not achieving TO. Covariates associated with achieving TO were younger age, the absence of pulmonary comorbidity, higher haemoglobin levels, and TIA as index event. In the case mix adjusted funnel plot, the O/E ratios between hospitals ranged between 0.63 and 1.27, with two hospitals revealing a statistically significantly lower rate of TO (with O/E ratios of 0.63 and 0.66). CONCLUSION: In the Netherlands, most patients treated by CEA achieve TO. Variation between hospitals in achieving TO might imply differences in performance. TO may be used as an additive to the pre-existing IOM, especially in surgical care with low baseline risk such as CEA.
Published: 2020
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6. Nationwide study of the treatment of mycotic abdominal aortic aneurysms comparing open and endovascular repair in The Netherlands

Author: Quan Dang, Randolph G. Statius van Eps, Jan J. Wever, Hugo T.C. Veger, L.H. Van den Akker, P.J. Van den Akker, G.J. Akkersdijk, G.P. Akkersdijk, W.L. Akkersdijk, M.G. van Andringa de Kempenaer, C.H. Arts, J.A. Avontuur, J.G. Baal, O.J. Bakker, R. Balm, W.B. Barendregt, M.H. Bender, B.L. Bendermacher, M. van den Berg, P. Berger, R.J. Beuk, J.D. Blankensteijn, R.J. Bleker, J.H. Bockel, M.E. Bodegom, K.E. Bogt, A.P. Boll, M.H. Booster, B.L. Borger van der Burg, G.J. de Borst, W.T. Bos- van Rossum, J. Bosma, J.M. Botman, L.H. Bouwman, J.C. Breek, V. Brehm, M.J. Brinckman, T.H. van den Broek, H.L. Brom, M.T. de Bruijn, J.L. de Bruin, P. Brummel, J.P. van Brussel, S.E. Buijk, M.G. Buimer, D.H. Burger, H.C. Buscher, G. den Butter, E. Cancrinus, P.H. Castenmiller, G. Cazander, H.M. Coveliers, P.H. Cuypers, J.H. Daemen, I. Dawson, A.F. Derom, A.R. Dijkema, J. Diks, M.K. Dinkelman, M. Dirven, D.E. Dolmans, R.C. van Doorn, L.M. van Dortmont, M.M. van der Eb, D. Eefting, G.J. van Eijck, J.W. Elshof, B.H. Elsman, A. van der Elst, M.I. van Engeland, R.G. van Eps, M.J. Faber, W.M. de Fijter, B. Fioole, W.M. Fritschy, R.H. Geelkerken, W.B. van Gent, G.J. Glade, B. Govaert, R.P. Groenendijk, H.G. de Groot, R.F. van den Haak, E.F. de Haan, G.F. Hajer, J.F. Hamming, E.S. van Hattum, C.E. Hazenberg, P.P. Hedeman Joosten, J.N. Helleman, L.G. van der Hem, J.M. Hendriks, J.A. van Herwaarden, J.M. Heyligers, J.W. Hinnen, R.J. Hissink, G.H. Ho, P.T. den Hoed, M.T. Hoedt, F. van Hoek, R. Hoencamp, W.H. Hoffmann, A.W. Hoksbergen, E.J. Hollander, L.C. Huisman, R.G. Hulsebos, K.M. Huntjens, M.M. Idu, M.J. Jacobs, M.F. van der Jagt, J.R. Jansbeken, R.J. Janssen, H.H. Jiang, S.C. de Jong, V. Jongkind, M.R. Kapma, B.P. Keller, A. Khodadade Jahrome, J.K. Kievit, P.L. Klemm, P. Klinkert, B. Knippenberg, N.A. Koedam, M.J. Koelemaij, J.L. Kolkert, G.G. Koning, O.H. Koning, A.G. Krasznai, R.M. Krol, R.H. Kropman, R.R. Kruse, L. van der Laan, M.J. van der Laan, J.H. van Laanen, J.H. Lardenoye, J.A. Lawson, D.A. Legemate, V.J. Leijdekkers, M.S. Lemson, M.M. Lensvelt, M.A. Lijkwan, R.C. Lind, F.T. van der Linden, P.F. Liqui Lung, M.J. Loos, M.C. Loubert, D.E. Mahmoud, C.G. Manshanden, E.C. Mattens, R. Meerwaldt, B.M. Mees, R. Metz, R.C. Minnee, J.C. de Mol van Otterloo, F.L. Moll, Y.C. Montauban van Swijndregt, M.J. Morak, R.H. van de Mortel, W. Mulder, S.K. Nagesser, C.C. Naves, J.H. Nederhoed, A.M. Nevenzel-Putters, A.J. de Nie, D.H. Nieuwenhuis, J. Nieuwenhuizen, R.C. van Nieuwenhuizen, D. Nio, A.P. Oomen, B.I. Oranen, J. Oskam, H.W. Palamba, A.G. Peppelenbosch, A.S. van Petersen, T.F. Peterson, B.J. Petri, M.E. Pierie, A.J. Ploeg, R.A. Pol, E.D. Ponfoort, P.P. Poyck, A. Prent, S. ten Raa, J.T. Raymakers, M. Reichart, B.L. Reichmann, M.M. Reijnen, A. Rijbroek, M.J. van Rijn, R.A. de Roo, E.V. Rouwet, C.G. Rupert, B.R. Saleem, M.R. van Sambeek, M.G. Samyn, H.P. van ’t Sant, J. van Schaik, P.M. van Schaik, D.M. Scharn, M.R. Scheltinga, A. Schepers, P.M. Schlejen, F.J. Schlosser, F.P. Schol, O. Schouten, M.H. Schreinemacher, M.A. Schreve, G.W. Schurink, C.J. Sikkink, A. te Slaa, H.J. Smeets, L. Smeets, A.A. de Smet, P. de Smit, P.C. Smit, T.M. Smits, M.G. Snoeijs, A.O. Sondakh, T.J. van der Steenhoven, S.M. van Sterkenburg, D.A. Stigter, H. Stigter, R.P. Strating, G.N. Stultiëns, J.E. Sybrandy, J.A. Teijink, B.J. Telgenkamp, M.J. Testroote, R.M. The, W.J. Thijsse, I.F. Tielliu, R.B. van Tongeren, R.J. Toorop, J.H. Tordoir, E. Tournoij, M. Truijers, K. Türkcan, R.P. Tutein Nolthenius, Ç. Ünlü, A.A. Vafi, A.C. Vahl, E.J. Veen, H.T. Veger, M.G. Veldman, H.J. Verhagen, B.A. Verhoeven, C.F. Vermeulen, E.G. Vermeulen, B.P. Vierhout, M.J. Visser, J.A. van der Vliet, C.J. Vlijmen - van Keulen, H.G. Voesten, R. Voorhoeve, A.W. Vos, B. de Vos, G.A. Vos, B.H. Vriens, P.W. Vriens, A.C. de Vries, J.P. de Vries, M. de Vries, C. van der Waal, E.J. Waasdorp, B.M. Wallis de Vries, L.A. van Walraven, J.L. van Wanroij, M.C. Warlé, V. van Weel, A.M. van Well, G.M. Welten, R.J. Welten, J.J. Wever, A.M. Wiersema, O.R. Wikkeling, W.I. Willaert, J. Wille, M.C. Willems, E.M. Willigendael, W. Wisselink, M.E. Witte, C.H. Wittens, I.C. Wolf-de Jonge, O. Yazar, C.J. Zeebregts, M.L. van Zeeland, RS: CAPHRI - R5 - Optimising Patient Care, Epidemiologie, Surgery, ACS - Atherosclerosis & ischemic syndromes, Pathology, VU University medical center, Pediatrics, Dermatology, ACS - Microcirculation, ACS - Diabetes & metabolism, and Multi-Modality Medical Imaging
Subjects: Male, Clinical audit, Time Factors, SURGERY, medicine.medical_treatment, Vascular damage Radboud Institute for Health Sciences [Radboudumc 16], Abdominal aneurysm, 030204 cardiovascular system & hematology, Endovascular aneurysm repair, Postoperative Complications, 0302 clinical medicine, Risk Factors, Registries, 030212 general & internal medicine, Mycotic, Netherlands, Medical Audit, OUTCOMES, Incidence, Incidence (epidemiology), Endovascular Procedures, Abdominal aorta, Clinical course, Infectious, Middle Aged, Anti-Bacterial Agents, Treatment Outcome, Female, Cardiology and Cardiovascular Medicine, medicine.medical_specialty, Patient Readmission, Risk Assessment, Drug Administration Schedule, Blood Vessel Prosthesis Implantation, 03 medical and health sciences, Aneurysm, THORACIC AORTA, medicine.artery, medicine, Humans, Aged, Retrospective Studies, ILIAC ARTERIES, business.industry, MORTALITY, Retrospective cohort study, medicine.disease, n/a OA procedure, Surgery, VOLUME, business, Aneurysm, Infected, Aortic Aneurysm, Abdominal
Abstract: Contains fulltext : 226470.pdf (Publisher’s version ) (Closed access) OBJECTIVE: Mycotic aneurysms of the abdominal aorta (MAAA) can be treated by open repair (OR) or endovascular aneurysm repair (EVAR). This nationwide study provides an overview of the situation of MAAA treatment in The Netherlands in 2016. METHODS: A retrospective cohort study was conducted with all centers that registered aortic abdominal aneurysms in the Dutch Surgical Aneurysm Audit in 2016. Questionnaires on 1-year outcomes were sent to all centers that treated patients with MAAA. The primary aim was to determine 30-day and 1-year mortality and morbidity of OR- and EVAR-treated patients. Morbidity was determined by the need for reoperations and the number of readmissions to the hospital. RESULTS: Twenty-six MAAA were detected in the Dutch Surgical Aneurysm Audit database of 2016, resulting in an incidence of 0.7% of all registered abdominal aortic aneurysms. The 30-day mortality for OR and EVAR treated patients was 1 in 13 and 0 in 13, respectively. Major and minor reinterventions within 30 days were needed for two (one OR and one EVAR) and two (one OR and one EVAR) patients, respectively. Two patients (15.4%) in the OR group and one patient (7.7%) in the EVAR group were readmitted to hospital within 30 days. In total, 1-year outcomes of 23 patients were available. In the OR group, one patient (9.1%) died in the first postoperative year. There was one major reintervention (removal of endoprosthesis and spiralvein reconstruction) in the EVAR group. Two patients (18.2%) treated with OR and two (16.7%) treated with EVAR required a minor reintervention. In both groups, four patients (OR, 36.4%; EVAR, 33.3%) were readmitted to hospital within 1 year postoperatively. CONCLUSIONS: Both OR- and EVAR-treated patients show acceptable clinical outcomes after 30 days and at the 1-year follow-up. Depending on the clinical course of the patient, EVAR may be considered in the management of this disease.
Published: 2020
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7. Patients with a Ruptured Abdominal Aortic Aneurysm Are Better Informed in Hospitals with an 'EVAR-preferred' Strategy: An Instrumental Variable Analysis of the Dutch Surgical Aneurysm Audit

Author: Eleonora G. Karthaus, Niki Lijftogt, Anco Vahl, Esmee M. van der Willik, Sonia Amodio, Erik W. van Zwet, Jaap F. Hamming, P.J. Van den Akker, G.J. Akkersdijk, G.P. Akkersdijk, W.L. Akkersdijk, M.G. van Andringa de Kempenaer, C.H. Arts, J.A. Avontuur, O.J. Bakker, R. Balm, W.B. Barendregt, J.A. Bekken, M.H. Bender, B.L. Bendermacher, M. van den Berg, P. Berger, R.J. Beuk, J.D. Blankensteijn, R.J. Bleker, J.J. Blok, A.S. Bode, M.E. Bodegom, K.E. van der Bogt, A.P. Boll, M.H. Booster, B.L. Borger van der Burg, G.J. de Borst, W.T. Bos- van Rossum, J. Bosma, J.M. Botman, L.H. Bouwman, V. Brehm, M.T. de Bruijn, J.L. de Bruin, P. Brummel, J.P. van Brussel, S.E. Buijk, M.A. Buijs, M.G. Buimer, D.H. Burger, H.C. Buscher, E. Cancrinus, P.H. Castenmiller, G. Cazander, A.M. Coester, P.H. Cuypers, J.H. Daemen, I. Dawson, J.E. Dierikx, M.L. Dijkstra, J. Diks, M.K. Dinkelman, M. Dirven, D.E. Dolmans, R.C. van Doorn, L.M. van Dortmont, J.W. Drouven, M.M. van der Eb, D. Eefting, G.J. van Eijck, J.W. Elshof, B.H. Elsman, A. van der Elst, M.I. van Engeland, R.G. van Eps, M.J. Faber, W.M. de Fijter, B. Fioole, T.M. Fokkema, F.A. Frans, W.M. Fritschy, P.H. Fung Kon Jin, R.H. Geelkerken, W.B. van Gent, G.J. Glade, B. Govaert, R.P. Groenendijk, H.G. de Groot, R.F. van den Haak, E.F. de Haan, G.F. Hajer, J.F. Hamming, E.S. van Hattum, C.E. Hazenberg, P.P. Hedeman Joosten, J.N. Helleman, L.G. van der Hem, J.M. Hendriks, J.A. van Herwaarden, J.M. Heyligers, J.W. Hinnen, R.J. Hissink, G.H. Ho, P.T. den Hoed, M.T. Hoedt, F. van Hoek, R. Hoencamp, W.H. Hoffmann, W. Hogendoorn, A.W. Hoksbergen, E.J. Hollander, M. Hommes, C.J. Hopmans, L.C. Huisman, R.G. Hulsebos, K.M. Huntjens, M.M. Idu, M.J. Jacobs, M.F. van der Jagt, J.R. Jansbeken, R.J. Janssen, H.H. Jiang, S.C. de Jong, T.A. Jongbloed-Winkel, V. Jongkind, M.R. Kapma, B.P. Keller, A. Khodadade Jahrome, J.K. Kievit, P.L. Klemm, P. Klinkert, N.A. Koedam, M.J. Koelemaij, J.L. Kolkert, G.G. Koning, O.H. Koning, R. Konings, A.G. Krasznai, R.M. Krol, R.H. Kropman, R.R. Kruse, L. van der Laan, M.J. van der Laan, J.H. van Laanen, G.W. van Lammeren, D.A. Lamprou, J.H. Lardenoye, G.J. Lauret, B.J. Leenders, D.A. Legemate, V.J. Leijdekkers, M.S. Lemson, M.M. Lensvelt, M.A. Lijkwan, R.C. Lind, F.T. van der Linden, P.F. Liqui Lung, M.J. Loos, M.C. Loubert, K.M. van de Luijtgaarden, D.E. Mahmoud, C.G. Manshanden, E.C. Mattens, R. Meerwaldt, B.M. Mees, G.C. von Meijenfeldt, T.P. Menting, R. Metz, R.C. Minnee, J.C. de Mol van Otterloo, M.J. Molegraaf, Y.C. Montauban van Swijndregt, M.J. Morak, R.H. van de Mortel, W. Mulder, S.K. Nagesser, C.C. Naves, J.H. Nederhoed, A.M. Nevenzel-Putters, A.J. de Nie, D.H. Nieuwenhuis, J. Nieuwenhuizen, R.C. van Nieuwenhuizen, D. Nio, V.J. Noyez, A.P. Oomen, B.I. Oranen, J. Oskam, H.W. Palamba, A.G. Peppelenbosch, A.S. van Petersen, B.J. Petri, M.E. Pierie, A.J. Ploeg, R.A. Pol, E.D. Ponfoort, I.C. Post, P.P. Poyck, A. Prent, S. ten Raa, J.T. Raymakers, M. Reichart, B.L. Reichmann, M.M. Reijnen, J.A. de Ridder, A. Rijbroek, M.J. van Rijn, R.A. de Roo, E.V. Rouwet, B.R. Saleem, P.B. Salemans, M.R. van Sambeek, M.G. Samyn, H.P. van ’t Sant, J. van Schaik, P.M. van Schaik, D.M. Scharn, M.R. Scheltinga, A. Schepers, P.M. Schlejen, F.J. Schlosser, F.P. Schol, V.P. Scholtes, O. Schouten, M.A. Schreve, G.W. Schurink, C.J. Sikkink, A. te Slaa, H.J. Smeets, L. Smeets, R.R. Smeets, A.A. de Smet, P.C. Smit, T.M. Smits, M.G. Snoeijs, A.O. Sondakh, M.J. Speijers, T.J. van der Steenhoven, S.M. van Sterkenburg, D.A. Stigter, R.A. Stokmans, R.P. Strating, G.N. Stultiëns, J.E. Sybrandy, J.A. Teijink, B.J. Telgenkamp, M. Teraa, M.J. Testroote, T. Tha-In, R.M. The, W.J. Thijsse, I. Thomassen, I.F. Tielliu, R.B. van Tongeren, R.J. Toorop, E. Tournoij, M. Truijers, K. Türkcan, R.P. Tutein Nolthenius, Ç. Ünlü, R.H. Vaes, A.A. Vafi, A.C. Vahl, E.J. Veen, H.T. Veger, M.G. Veldman, S. Velthuis, H.J. Verhagen, B.A. Verhoeven, C.F. Vermeulen, E.G. Vermeulen, B.P. Vierhout, R.J. van der Vijver-Coppen, M.J. Visser, J.A. van der Vliet, C.J. Vlijmen - van Keulen, R. Voorhoeve, J.R. van der Vorst, A.W. Vos, B. de Vos, C.G. Vos, G.A. Vos, M.T. Voute, B.H. Vriens, P.W. Vriens, A.C. de Vries, D.K. de Vries, J.P. de Vries, M. de Vries, C. van der Waal, E.J. Waasdorp, B.M. Wallis de Vries, L.A. van Walraven, J.L. van Wanroij, M.C. Warlé, W. van de Water, V. van Weel, A.M. van Well, G.M. Welten, R.J. Welten, J.J. Wever, A.M. Wiersema, O.R. Wikkeling, W.I. Willaert, J. Wille, M.C. Willems, E.M. Willigendael, E.D. Wilschut, W. Wisselink, M.E. Witte, C.H. Wittens, C.Y. Wong, R. Wouda, O. Yazar, K.K. Yeung, C.J. Zeebregts, M.L. van Zeeland, Multi-Modality Medical Imaging, Surgery, ACS - Atherosclerosis & ischemic syndromes, APH - Methodology, APH - Quality of Care, RS: CAPHRI - R5 - Optimising Patient Care, and Epidemiologie
Subjects: Male, Time Factors, medicine.medical_treatment, Vascular damage Radboud Institute for Health Sciences [Radboudumc 16], UT-Hybrid-D, 030204 cardiovascular system & hematology, Logistic regression, Endovascular aneurysm repair, 030218 nuclear medicine & medical imaging, law.invention, Postoperative Complications, 0302 clinical medicine, Randomized controlled trial, Risk Factors, law, 80 and over, Hospital Mortality, Prospective Studies, Prospective cohort study, Netherlands, Aged, 80 and over, OUTCOMES, Medical Audit, education.field_of_study, Endovascular Procedures, Confounding, Absolute risk reduction, General Medicine, EDITORS CHOICE, Aortic Aneurysm, Treatment Outcome, OPEN SURGERY, TRIAL, Female, Cardiology and Cardiovascular Medicine, medicine.medical_specialty, Aortic Rupture, Clinical Decision-Making, Population, Abdominal/diagnostic imaging, Postoperative Complications/mortality, Risk Assessment, Blood Vessel Prosthesis Implantation, 03 medical and health sciences, medicine, Humans, Endovascular Procedures/adverse effects, Blood Vessel Prosthesis Implantation/adverse effects, education, Aged, business.industry, MORTALITY, ENDOVASCULAR REPAIR, Surgery, Aortic Rupture/diagnostic imaging, Propensity score matching, business, Aortic Aneurysm, Abdominal/diagnostic imaging, Aortic Aneurysm, Abdominal
Abstract: Contains fulltext : 229914.pdf (Publisher’s version ) (Open Access) BACKGROUND: While several observational studies suggested a lower postoperative mortality after minimal invasive endovascular aneurysm repair (EVAR) in patients with a ruptured abdominal aortic aneurysm (RAAA) compared to conventional open surgical repair (OSR), landmark randomized controlled trials have not been able to prove the superiority of EVAR over OSR. Randomized controlled trials contain a selected, homogeneous population, influencing external validity. Observational studies are biased and adjustment of confounders can be incomplete. Instrumental variable (IV) analysis (pseudorandomization) may help to answer the question if patients with an RAAA have lower postoperative mortality when undergoing EVAR compared to OSR. METHODS: This is an observational study including all patients with an RAAA, registered in the Dutch Surgical Aneurysm Audit between 2013 and 2017. The risk difference (RD) in postoperative mortality (30 days/in-hospital) between patients undergoing EVAR and OSR was estimated, in which adjustment for confounding was performed in 3 ways: linear model adjusted for observed confounders, propensity score model (multivariable logistic regression analysis), and IV analysis (two-stage least square regression), adjusting for observed and unobserved confounders, with the variation in percentage of EVAR per hospital as the IV instrument. RESULTS: 2419 patients with an RAAA (1489 OSR and 930 EVAR) were included. Unadjusted postoperative mortality was 34.9% after OSR and 22.6% after EVAR (RD 12.3%, 95% CI 8.5-16%). The RD adjusted for observed confounders using linear regression analysis and propensity score analysis was, respectively, 12.3% (95% CI 9.6-16.7%) and 13.2% (95%CI 9.3-17.1%) in favor of EVAR. Using IV analysis, adjusting for observed and unobserved confounders, RD was 8.9% (95% CI -1.1-18.9%) in favor of EVAR. CONCLUSIONS: Adjusting for observed confounders, patients with an RAAA undergoing EVAR had a significant better survival than OSR in a consecutive large cohort. Adjustment for unobserved confounders resulted in a clinical relevant RD. An "EVAR preference strategy" in patients with an RAAA could result in lower postoperative mortality.
Published: 2020

8. Failure to Rescue - a Closer Look at Mortality Rates Has No Added Value for Hospital Comparisons but Is Useful for Team Quality Assessment in Abdominal Aortic Aneurysm Surgery in The Netherlands

Author: Niki Lijftogt, Eleonora G. Karthaus, Anco Vahl, Erik W. van Zwet, Esmee M. van der Willik, Robertus A.E.M. Tollenaar, Jaap F. Hamming, Michel W.J.M. Wouters, L.H. Van den Akker, P.J. Van den Akker, G.J. Akkersdijk, G.P. Akkersdijk, W.L. Akkersdijk, M.G. van Andringa de Kempenaer, C.H. Arts, J.A. Avontuur, J.G. Baal, O.J. Bakker, R. Balm, W.B. Barendregt, M.H. Bender, B.L. Bendermacher, M. van den Berg, P. Berger, R.J. Beuk, J.D. Blankensteijn, R.J. Bleker, J.H. Bockel, M.E. Bodegom, K.E. Bogt, A.P. Boll, M.H. Booster, B.L. Borger van der Burg, G.J. de Borst, W.T. Bos-van Rossum, J. Bosma, J.M. Botman, L.H. Bouwman, J.C. Breek, V. Brehm, M.J. Brinckman, T.H. van den Broek, H.L. Brom, M.T. de Bruijn, J.L. de Bruin, P. Brummel, J.P. van Brussel, S.E. Buijk, M.G. Buimer, D.H. Burger, H.C. Buscher, G. den Butter, E. Cancrinus, P.H. Castenmiller, G. Cazander, H.M. Coveliers, P.H. Cuypers, J.H. Daemen, I. Dawson, A.F. Derom, A.R. Dijkema, J. Diks, M.K. Dinkelman, M. Dirven, D.E. Dolmans, R.C. van Doorn, L.M. van Dortmont, M.M. van der Eb, D. Eefting, G.J. van Eijck, J.W. Elshof, B.H. Elsman, A. van der Elst, M.I. van Engeland, R.G. van Eps, M.J. Faber, W.M. de Fijter, B. Fioole, W.M. Fritschy, R.H. Geelkerken, W.B. van Gent, G.J. Glade, B. Govaert, R.P. Groenendijk, H.G. de Groot, R.F. van den Haak, E.F. de Haan, G.F. Hajer, J.F. Hamming, E.S. van Hattum, C.E. Hazenberg, P.P. Hedeman Joosten, J.N. Helleman, L.G. van der Hem, J.M. Hendriks, J.A. van Herwaarden, J.M. Heyligers, J.W. Hinnen, R.J. Hissink, G.H. Ho, P.T. den Hoed, M.T. Hoedt, F. van Hoek, R. Hoencamp, W.H. Hoffmann, A.W. Hoksbergen, E.J. Hollander, L.C. Huisman, R.G. Hulsebos, K.M. Huntjens, M.M. Idu, M.J. Jacobs, M.F. van der Jagt, J.R. Jansbeken, R.J. Janssen, H.H. Jiang, S.C. de Jong, V. Jongkind, M.R. Kapma, B.P. Keller, A. Khodadade Jahrome, J.K. Kievit, P.L. Klemm, P. Klinkert, B. Knippenberg, N.A. Koedam, M.J. Koelemaij, J.L. Kolkert, G.G. Koning, O.H. Koning, A.G. Krasznai, R.M. Krol, R.H. Kropman, R.R. Kruse, L. van der Laan, M.J. van der Laan, J.H. van Laanen, J.H. Lardenoye, J.A. Lawson, D.A. Legemate, V.J. Leijdekkers, M.S. Lemson, M.M. Lensvelt, M.A. Lijkwan, R.C. Lind, F.T. van der Linden, P.F. Liqui Lung, M.J. Loos, M.C. Loubert, D.E. Mahmoud, C.G. Manshanden, E.C. Mattens, R. Meerwaldt, B.M. Mees, R. Metz, R.C. Minnee, J.C. de Mol van Otterloo, F.L. Moll, Y.C. Montauban van Swijndregt, M.J. Morak, R.H. van de Mortel, W. Mulder, S.K. Nagesser, C.C. Naves, J.H. Nederhoed, A.M. Nevenzel-Putters, A.J. de Nie, D.H. Nieuwenhuis, J. Nieuwenhuizen, R.C. van Nieuwenhuizen, D. Nio, A.P. Oomen, B.I. Oranen, J. Oskam, H.W. Palamba, A.G. Peppelenbosch, A.S. van Petersen, T.F. Peterson, B.J. Petri, M.E. Pierie, A.J. Ploeg, R.A. Pol, E.D. Ponfoort, P.P. Poyck, A. Prent, S. ten Raa, J.T. Raymakers, M. Reichart, B.L. Reichmann, M.M. Reijnen, A. Rijbroek, M.J. van Rijn, R.A. de Roo, E.V. Rouwet, C.G. Rupert, B.R. Saleem, M.R. van Sambeek, M.G. Samyn, H.P. van ’t Sant, J. van Schaik, P.M. van Schaik, D.M. Scharn, M.R. Scheltinga, A. Schepers, P.M. Schlejen, F.J. Schlosser, F.P. Schol, O. Schouten, M.H. Schreinemacher, M.A. Schreve, G.W. Schurink, C.J. Sikkink, M.P. Siroen, A. te Slaa, H.J. Smeets, L. Smeets, A.A. de Smet, P. de Smit, P.C. Smit, T.M. Smits, M.G. Snoeijs, A.O. Sondakh, T.J. van der Steenhoven, S.M. van Sterkenburg, D.A. Stigter, H. Stigter, R.P. Strating, G.N. Stultiëns, J.E. Sybrandy, J.A. Teijink, B.J. Telgenkamp, M.J. Testroote, R.M. The, W.J. Thijsse, I.F. Tielliu, R.B. van Tongeren, R.J. Toorop, J.H. Tordoir, E. Tournoij, M. Truijers, K. Türkcan, R.P. Tutein Nolthenius, Ç. Ünlü, A.A. Vafi, A.C. Vahl, E.J. Veen, H.T. Veger, M.G. Veldman, H.J. Verhagen, B.A. Verhoeven, C.F. Vermeulen, E.G. Vermeulen, B.P. Vierhout, M.J. Visser, J.A. van der Vliet, C.J. Vlijmen-van Keulen, H.G. Voesten, R. Voorhoeve, A.W. Vos, B. de Vos, G.A. Vos, B.H. Vriens, P.W. Vriens, A.C. de Vries, J.P. de Vries, M. de Vries, C. van der Waal, E.J. Waasdorp, B.M. Wallis de Vries, L.A. van Walraven, J.L. van Wanroij, M.C. Warlé, V. van Weel, A.M. van Well, G.M. Welten, R.J. Welten, J.J. Wever, A.M. Wiersema, O.R. Wikkeling, W.I. Willaert, J. Wille, M.C. Willems, E.M. Willigendael, W. Wisselink, M.E. Witte, C.H. Wittens, I.C. Wolf-de Jonge, O. Yazar, C.J. Zeebregts, M.L. van Zeeland, RS: CAPHRI - R5 - Optimising Patient Care, Epidemiologie, Surgery, Pediatrics, ACS - Atherosclerosis & ischemic syndromes, Pathology, Dermatology, ACS - Microcirculation, AII - Inflammatory diseases, and AGEM - Digestive immunity
Subjects: Clinical audit, medicine.medical_specialty, Funnel plot, TO-RESCUE, Time Factors, Failure to rescue, Vascular damage Radboud Institute for Health Sciences [Radboudumc 16], MODELS, 030204 cardiovascular system & hematology, 030230 surgery, PREVENTABILITY, 03 medical and health sciences, Postoperative Complications, 0302 clinical medicine, Aneurysm, medicine, Humans, Hospital Mortality, SURGICAL COLORECTAL AUDIT, Netherlands, TRAUMA, REPAIR, RISK, Surgical outcome, OUTCOMES, medicine.diagnostic_test, business.industry, Mortality rate, Endovascular Procedures, Glasgow Coma Scale, CARE, medicine.disease, Quality Improvement, CANCER, Hospitals, Abdominal aortic aneurysm, Surgery, Composite outcome measures, Elective Surgical Procedures, Cardiology and Cardiovascular Medicine, business, Electrocardiography, Aortic Aneurysm, Abdominal
Abstract: Objectives: Failure to rescue (FTR) is a composite quality indicator, defined as the proportion of deceased patients following major complications. The aims of this study were to compare FTR with mortality for hospital comparisons in abdominal aortic aneurysm (AAA) surgery in The Netherlands and investigate hospital volume and associated factors.Methods: Patients prospectively registered between 2013 and 2015 in the Dutch Surgical Aneurysm Audit (DSAA) were analysed. FTR was analysed for AAA patients and subgroups elective (EAAA) and acute (AAAA; symptomatic or ruptured) aneurysms. Variables and hospital volume were analysed by uni- and multivariable regression analysis. Adjusted hospital comparisons for mortality, major complications, and FTR were presented in funnel plots. Isomortality lines were constructed when presenting FTR and major complication rates.Results: A total of 9258 patients were analysed in 61 hospitals: 7149 EAAA patients (77.2%) and 2109 AAAA patients (22.8%). There were 2785 (30.1%) patients with complications (unadjusted range 5-65% per hospital): 2161 (77.6%) with major and 624 (28.4%) patients with minor complications. Overall mortality was 6.6% (adjusted range 0-16% per hospital) and FTR was 28.4% (n = 613) (adjusted range 0-60% per hospital). Glasgow Coma Scale, age, pulse, creatinine, electrocardiography, and operative setting were independently associated with FTR. Hospital volume was not associated with FTR. In AAAA patients hospital volume was significantly associated with a lower adjusted major complication and mortality rate (OR 0.62, 95% CI 0.49-0.78; and 0.64, 95% CI 0.48-0.87). Four hospitals had a significant lower adjusted FTR with different major complication rates on different isomortality lines.Conclusions: There was more variation in FTR than in mortality between hospitals. FTR identified the same best performing hospitals as for mortality and therefore was of limited additional value in measuring quality of care for AAA surgery. FTR can be used for internal quality improvement with major complications in funnel plots and diagrams with isomortality lines. (C) 2018 European Society for Vascular Surgery. Published by Elsevier B.V. All rights reserved.
Published: 2018
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9. The Dutch Audit of Carotid Interventions: Transparency in Quality of Carotid Endarterectomy in Symptomatic Patients in the Netherlands

Author: Eleonora G. Karthaus, Anco Vahl, Laurien S. Kuhrij, Bernard H.P. Elsman, Robert H. Geelkerken, Michel W.J.M. Wouters, Jaap F. Hamming, Gert J. de Borst, L.H. Van den Akker, P.J. Van den Akker, G.J. Akkersdijk, G.P. Akkersdijk, W.L. Akkersdijk, M.G. van Andringa de Kempenaer, C.H. Arts, J.A. Avontuur, J.G. Baal, O.J. Bakker, R. Balm, W.B. Barendregt, M.H. Bender, B.L. Bendermacher, M. van den Berg, P. Berger, R.J. Beuk, J.D. Blankensteijn, R.J. Bleker, J.H. Bockel, M.E. Bodegom, K.E. Bogt, A.P. Boll, M.H. Booster, B.L. Borger van der Burg, G.J. de Borst, W.T. Bos- van Rossum, J. Bosma, J.M. Botman, L.H. Bouwman, J.C. Breek, V. Brehm, M.J. Brinckman, T.H. van den Broek, H.L. Brom, M.T. de Bruijn, J.L. de Bruin, P. Brummel, J.P. van Brussel, S.E. Buijk, M.G. Buimer, D.H. Burger, H.C. Buscher, G. den Butter, E. Cancrinus, P.H. Castenmiller, G. Cazander, H.M. Coveliers, P.H. Cuypers, J.H. Daemen, I. Dawson, A.F. Derom, A.R. Dijkema, J. Diks, M.K. Dinkelman, M. Dirven, D.E. Dolmans, R.C. van Doorn, L.M. van Dortmont, M.M. van der Eb, D. Eefting, G.J. van Eijck, J.W. Elshof, B.H. Elsman, A. van der Elst, M.I. van Engeland, R.G. van Eps, M.J. Faber, W.M. de Fijter, B. Fioole, W.M. Fritschy, R.H. Geelkerken, W.B. van Gent, G.J. Glade, B. Govaert, R.P. Groenendijk, H.G. de Groot, R.F. van den Haak, E.F. de Haan, G.F. Hajer, J.F. Hamming, E.S. van Hattum, C.E. Hazenberg, P.P. Hedeman Joosten, J.N. Helleman, L.G. van der Hem, J.M. Hendriks, J.A. van Herwaarden, J.M. Heyligers, J.W. Hinnen, R.J. Hissink, G.H. Ho, P.T. den Hoed, M.T. Hoedt, F. van Hoek, R. Hoencamp, W.H. Hoffmann, A.W. Hoksbergen, E.J. Hollander, L.C. Huisman, R.G. Hulsebos, K.M. Huntjens, M.M. Idu, M.J. Jacobs, M.F. van der Jagt, J.R. Jansbeken, R.J. Janssen, H.H. Jiang, S.C. de Jong, V. Jongkind, M.R. Kapma, B.P. Keller, A. Khodadade Jahrome, J.K. Kievit, P.L. Klemm, P. Klinkert, B. Knippenberg, N.A. Koedam, M.J. Koelemaij, J.L. Kolkert, G.G. Koning, O.H. Koning, A.G. Krasznai, R.M. Krol, R.H. Kropman, R.R. Kruse, L. van der Laan, M.J. van der Laan, J.H. van Laanen, J.H. Lardenoye, J.A. Lawson, D.A. Legemate, V.J. Leijdekkers, M.S. Lemson, M.M. Lensvelt, M.A. Lijkwan, R.C. Lind, F.T. van der Linden, P.F. Liqui Lung, M.J. Loos, M.C. Loubert, D.E. Mahmoud, C.G. Manshanden, E.C. Mattens, R. Meerwaldt, B.M. Mees, R. Metz, R.C. Minnee, J.C. de Mol van Otterloo, F.L. Moll, Y.C. Montauban van Swijndregt, M.J. Morak, R.H. van de Mortel, W. Mulder, S.K. Nagesser, C.C. Naves, J.H. Nederhoed, A.M. Nevenzel-Putters, A.J. de Nie, D.H. Nieuwenhuis, J. Nieuwenhuizen, R.C. van Nieuwenhuizen, D. Nio, A.P. Oomen, B.I. Oranen, J. Oskam, H.W. Palamba, A.G. Peppelenbosch, A.S. van Petersen, T.F. Peterson, B.J. Petri, M.E. Pierie, A.J. Ploeg, R.A. Pol, E.D. Ponfoort, P.P. Poyck, A. Prent, S. ten Raa, J.T. Raymakers, M. Reichart, B.L. Reichmann, M.M. Reijnen, A. Rijbroek, M.J. van Rijn, R.A. de Roo, E.V. Rouwet, C.G. Rupert, B.R. Saleem, M.R. van Sambeek, M.G. Samyn, H.P. van 't Sant, J. van Schaik, P.M. van Schaik, D.M. Scharn, M.R. Scheltinga, A. Schepers, P.M. Schlejen, F.J. Schlosser, F.P. Schol, O. Schouten, M.H. Schreinemacher, M.A. Schreve, G.W. Schurink, C.J. Sikkink, M.P. Siroen, A. te Slaa, H.J. Smeets, L. Smeets, A.A. de Smet, P. de Smit, P.C. Smit, T.M. Smits, M.G. Snoeijs, A.O. Sondakh, T.J. van der Steenhoven, S.M. van Sterkenburg, D.A. Stigter, H. Stigter, R.P. Strating, D. Stultiëns, J.E. Sybrandy, J.A. Teijink, B.J. Telgenkamp, M.J. Testroote, R.M. The, W.J. Thijsse, I.F. Tielliu, R.B. van Tongeren, R.J. Toorop, J.H. Tordoir, E. Tournoij, M. Truijers, K. Türkcan, R.P. Tutein Nolthenius, Ç. Ünlü, A.A. Vafi, A.C. Vahl, E.J. Veen, H.T. Veger, M.G. Veldman, H.J. Verhagen, B.A. Verhoeven, C.F. Vermeulen, E.G. Vermeulen, B.P. Vierhout, M.J. Visser, J.A. van der Vliet, C.J. Vlijmen - van Keulen, H.G. Voesten, R. Voorhoeve, A.W. Vos, B. de Vos, G.A. Vos, B.H. Vriens, P.W. Vriens, A.C. de Vries, J.P. de Vries, M. de Vries, C. van der Waal, E.J. Waasdorp, B.M. Wallis de Vries, L.A. van Walraven, J.L. van Wanroij, M.C. Warlé, V. van Weel, A.M. van Well, G.M. Welten, R.J. Welten, J.J. Wever, A.M. Wiersema, O.R. Wikkeling, W.I. Willaert, J. Wille, M.C. Willems, E.M. Willigendael, W. Wisselink, M.E. Witte, C.H. Wittens, I.C. Wolf-de Jonge, O. Yazar, C.J. Zeebregts, M.L. van Zeeland, Jan-Willem Elshof, Martine C. Willems, Surgery, ACS - Atherosclerosis & ischemic syndromes, Pathology, Pediatrics, Dermatology, ACS - Microcirculation, AII - Inflammatory diseases, AGEM - Digestive immunity, RS: CAPHRI - R5 - Optimising Patient Care, Epidemiologie, ANS - Neurovascular Disorders, Graduate School, and Multi-Modality Medical Imaging
Subjects: Male, medicine.medical_specialty, Patients, medicine.medical_treatment, Vascular damage Radboud Institute for Health Sciences [Radboudumc 16], Psychological intervention, Carotid endarterectomy, 030204 cardiovascular system & hematology, Revascularization, Logistic regression, STENOSIS, Risk Assessment, 03 medical and health sciences, 0302 clinical medicine, CEA, National clinical audit, Risk Factors, medicine, Humans, Carotid Stenosis, Hospital Mortality, 030212 general & internal medicine, PREDICTORS, Stroke, Netherlands, OUTCOMES, COMPLICATIONS, Endarterectomy, Carotid, business.industry, Mortality rate, DEATH, Quality of care, Symptomatic carotid artery stenosis, medicine.disease, n/a OA procedure, Stenosis, TRIALS, Treatment Outcome, Cohort, Emergency medicine, REVASCULARIZATION, Female, Surgery, Cardiology and Cardiovascular Medicine, business
Abstract: Background: The Dutch Audit for Carotid Interventions (DACI) registers all patients undergoing interventions for carotid artery stenosis in the Netherlands. This study describes the design of the DACI and results of patients with a symptomatic stenosis undergoing carotid endarterectomy (CEA). It aimed to evaluate variation between hospitals in process of care and (adjusted) outcomes, as well as predictors of major stroke/death after CEA.Methods: All patients with a symptomatic stenosis, who underwent CEA and were registered in the DACI between 2014 and 2016 were included in this cohort. Descriptive analyses of patient characteristics, process of care, and outcomes were performed. Casemix adjusted hospital procedural outcomes as (30 day/in hospital) mortality, stroke/death, and major stroke/death, were compared with the national mean. A multivariable logistic regression model (backward elimination at p > 0.10) was used to identify predictors of major stroke/death.Results: A total of 6459 patients, registered by 52 hospitals, were included. The majority (4,832, 75%) were treated Conclusion: CEA in The Netherlands is associated with an overall low mortality and (major) stroke/death rate. Whereas the indicator time to intervention varied between hospitals, mortality and (major) stroke/death were not significantly distinctive enough to identify worse practices and therefore were unsuitable for hospital comparison in the Dutch setting. Additionally, predictors of major stroke/death at population level could be identified. (C) 2018 European Society for Vascular Surgery. Published by Elsevier B.V. All rights reserved.
Published: 2018
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10. Cyclic loading of fractured cadaveric femurs after elastomer femoroplasty

Author: Rob G H H Nelissen, Edward R. Valstar, W. Schaasberg, T.J. van der Steenhoven, and A.C. de Vries
Subjects: Orthodontics, medicine.medical_specialty, Materials science, medicine.medical_treatment, Biophysics, Elastomer, Crosshead, Surgery, Preload, Cadaver, Fracture (geology), medicine, Orthopedics and Sports Medicine, Femur, Cadaveric spasm, Reduction (orthopedic surgery)
Abstract: Background Elastomer femoroplasty is a novel and experimental approach in the prevention of hip fracture surgery. Previously, we published the results of an in vitro cadaveric experiment in which we showed a significant reduction of fracture displacement in treated femurs. The aim of the present study was to establish the failure loads and inter‐fragmentary movement of fractured, elastomer femoroplasty treated femurs during cyclic loading. Methods 16 cadaveric femurs were treated with elastomer femoroplasty and fractured in a simulated fall configuration. Each specimen underwent 10 cycles with a preload of 50 N, starting with a peak load of 250 N followed by 10 cycles of 500 N and continued with 500 N increments. The crosshead speed was 2 mm/s. The failure load, the number of completed cycles, and crosshead extensions were recorded. Findings The mean failure load was 2709 N (SD 1094). The number of completed cycles until failure was 60 (SD 22). The mean translation during maximum loading was 5.25 mm (SD 0.9). At 1500 N (two times the bodyweight of a 75 kg individual) the extension was 3.16 mm. Interpretation Preventive elastomer femoroplasty leads to the stabilization of the proximal femur after fracture. In a single leg stance configuration, cyclic loading with mean failure loads that well exceed the peak loads during normal gait is feasible.
Published: 2012
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11. Elastomer femoroplasty prevents hip fracture displacement

Author: W. Schaasberg, Rob G H H Nelissen, Edward R. Valstar, T.J. van der Steenhoven, and A.C. de Vries
Subjects: musculoskeletal diseases, Orthodontics, Greater trochanter, Hip fracture, business.industry, Radiography, Biophysics, Anatomy, musculoskeletal system, Balloon, medicine.disease, Cadaver, medicine, Orthopedics and Sports Medicine, Displacement (orthopedic surgery), Femur, Cadaveric spasm, business
Abstract: The purpose of this study was to test femur strength and the ability to prevent fracture displacement of two minimal invasive Elastomer femoroplasty techniques. Methods A total of sixteen fixed human cadaveric femur pairs were used. From each pair one femur was randomly assigned for Elastomer femoroplasty. In these femora we drilled a 3.5 mm entrance in the lateral cortex. Cavities for the Elastomer were created by: group A, balloon and group B an excentric drill. All femora were fractured by simulating a fall on the greater trochanter. Neck-shaft-angles on plain anterior posterior radiographs were measured to determine fracture displacement. Findings There was no significant difference in fracture load between controls and treated femora for group A, 2904 N (SD 1091) versus 2803 N (SD 627) and group B, 2773 N (SD 747) versus 2597 N (SD 834). In group A the mean displacement was 35° (SD 14) for the control femora and 3° (SD 2) for the treated femora ( P P Interpretation The results of this study show that minimal invasive Elastomer femoroplasty prevents fracture displacement of the proximal femur. We found no significant compromise in load-to-fracture after minimal invasive balloon or excentric drill femoroplasty.
Published: 2011
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12. Aortic Customize: An In Vivo Feasibility Study of a Percutaneous Technique for the Repair of Aortic Aneurysms Using Injectable Elastomer

Author: Jaap F. Hamming, O. van den Berg, John Vlot, T.J. van der Steenhoven, A.C. de Vries, M. Jacobs, Henri Lorenzo Frederik Brom, Willem-Maarten Bosman, Surgery, and RS: CARIM School for Cardiovascular Diseases
Subjects: medicine.medical_specialty, Percutaneous, Swine, medicine.medical_treatment, Injections, Intralesional, Prosthesis Design, Elastomer, Aortography, Endovascular aneurysm repair, Catheterization, Blood Vessel Prosthesis Implantation, In vivo study, Aneurysm, In vivo, Animals, Medicine, Dimethylpolysiloxanes, cardiovascular diseases, Endovascular treatment, Medicine(all), Polydimethylsiloxane, business.industry, Abdominal aortic aneurysm Aneurysm-sac filling Endovascular aneurysm repair In vivo study Polydimethylsiloxane proximal perigraft endoleak endovascular repair neck angulation grafts complications diameter outcomes trial evar, medicine.disease, Aneurysm-sac filling, Abdominal aortic aneurysm, Blood Vessel Prosthesis, Disease Models, Animal, Catheter, Silicone Elastomers, cardiovascular system, Feasibility Studies, Surgery, Radiology, Cardiology and Cardiovascular Medicine, business, Aortic Aneurysm, Abdominal, Biomedical engineering
Abstract: Objective: This study aimed to test a percutaneous technique for aneurysm-sac filling by means of in situ polymerisation in an in vivo model. Design: Aortic Customize is a new endovascular treatment concept for aortic aneurysms: a non-cross-linked liquid elastomer is injected to fill the aneurysm sac around a balloon-catheter. With this method, a compliant elastomer mould with a patent lumen is created. Material: The formulation used in the experiments consisted of a two-component addition-cure liquid-silicone formulation, based on vinyl-terminated polydimethylsiloxane (PDMS). Methods: The concept of aneurysm-sac filling was tested in vivo in porcine experiments (n = 3). Results: In vivo porcine experiments with the sac-filling application showed successful exclusion of the created aneurysms with patent lumens and absence of endoleaks. The aneurysms were excluded successfully in the in vivo model, injecting elastomer through a 7-French catheter, filling up the entire aneurysm sac. Conclusions: These in vivo experiments demonstrate that the principle of aneurysm-sac filling by means of in situ curing is feasible, excluding the aneurysm and creating a new lumen. Further long-term animal experiments must be done prior to consideration of clinical application. (C) 2010 European Society for Vascular Surgery. Published by Elsevier Ltd. All rights reserved.
Published: 2010
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13. Augmentation with silicone stabilizes proximal femur fractures: An in vitro biomechanical study

Author: W. Schaasberg, Edward R. Valstar, A.C. de Vries, T.J. van der Steenhoven, and Rob G H H Nelissen
Subjects: Male, musculoskeletal diseases, medicine.medical_specialty, Population, Silicones, Biophysics, Hip fracture surgery, Single leg stance, Fracture Fixation, Internal, Fractures, Bone, chemistry.chemical_compound, Silicone, Cadaver, Tensile Strength, Materials Testing, medicine, Humans, Orthopedics and Sports Medicine, Femur, education, Aged, Aged, 80 and over, Orthodontics, education.field_of_study, Proximal femur, business.industry, Reproducibility of Results, Equipment Design, Biomechanical Phenomena, Surgery, Bone Diseases, Metabolic, chemistry, Fracture (geology), Osteoporosis, Female, Stress, Mechanical, business
Abstract: Background Prevention of hip fracture surgery in the elderly imposes great benefit for patient care as well as for society. The incidence of contra-lateral, second hip fractures after hip fracture surgery is as high as 20%. Augmentation of the contra-lateral proximal femur with silicone femoroplasty during hip fracture surgery of the ipsilateral hip could be a new preventive strategy. This study compared the degree of dislocation after a controlled induced fracture between treated and control cadaver femora. Methods Ten paired cadaver femora were randomly assigned for silicone femoroplasty and biomechanically tested for fracture load and dislocation against their native contra-lateral control. A load testing machine was used for fracture induction. All femurs were first fractured in a simulated fall configuration followed by dislocation in a “single leg stance” configuration. Dislocation was accessed using the AO-classification and measuring the Caput–Collum–Diaphysis angle. Findings Fracture loads were approximately 10% lower in the treated group ( P = 0.304). Forces needed to dislocate the proximal femur fractures did not significantly differ in both groups nor did the fracture type and AO-classification. All treated femurs showed complete reposition according to Caput–Collum–Diaphysis angle after dislocation versus only two of the controls ( P Interpretation From the results of this study we conclude silicone femoroplasty stabilizes the proximal femur by restoring hip geometry according to the Caput–Collum–Diaphysis angle after fracture. Future improvements in minimal invasive excavation and injection could make silicone femoroplasty an attractive alternative strategy in the prevention of hip fracture surgery in the growing population of low-demand, elderly patients.
Published: 2009
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14. Zinc chloride–mediated reduction of apoptosis as an adjunct immunosuppressive modality in cardiac transplantation

Author: Carina Mari, Murray H Kown, T.J. van der Steenhoven, Mark L Koransky, Christina L Jahncke, Francis G. Blankenberg, Maarten A. Lijkwan, Robert C. Robbins, and H. William Strauss
Subjects: Male, Pulmonary and Respiratory Medicine, medicine.medical_treatment, chemistry.chemical_element, Apoptosis, Pharmacology, Technetium, Chlorides, Annexin, In vivo, medicine, Animals, Radionuclide Imaging, Transplantation, Chemotherapy, business.industry, Graft Survival, Heart, Immunosuppression, medicine.disease, Rats, Rats, Inbred ACI, chemistry, Zinc Compounds, Heart failure, Immunology, Cyclosporine, Heart Transplantation, Surgery, Cardiology and Cardiovascular Medicine, business, Immunosuppressive Agents
Abstract: Zinc (Zn) blocks caspase-3 activation in cardiac allografts and therefore may synergistically decrease apoptosis along with cyclosporine (CsA), which inhibits mitochondrial release of cytochrome c. Simultaneous treatment of rat recipients of heterotopic heart transplants with zinc chloride (ZnCl(2)) thus may allow lower doses of CsA for immunosuppression.PVG (RT1(c)) rat hearts were transplanted heterotopically into the abdomen of ACI (RT1(a)) rats. Group 1 (n = 15) rats received no treatment. Group 2 rats (n = 8) received 2 mg/kg/day CsA (sub-therapeutic dose) by oral gavage. Group 3 rats (n = 9) received 2 mg/kg/day oral CsA in addition to 1 mg/kg/day sub-cutaneous ZnCl(2) delivered by osmotic pump. All rats were imaged using Annexin V-bound (99m)Technetium ((99m)Tc-Annexin V) on post-operative Day 4 and subsequently killed. Annexin V avidly binds apoptotic cells in vivo. Region of interest per whole body (WB) data were calculated using the images. The allograft survival study was conducted with n = 11, 6, and 5 in control, CsA, and CsA+Zn groups, respectively. Finally, percentages of allografts that reached tolerance were measured in both CsA-only and CsA+Zn groups (n = 8 each).Zinc chloride had an additive effect with CsA on apoptotic blockade and graft survival. The regions of interest per WB uptake of (99m)Tc-Annexin V were 2.43% +/- 0.37%, 2.08% +/- 0.52%, and 1.49% +/- 0.29%*, and acute survivals were 6.4 +/- 1.7, 7.2 +/- 2.1, and 11.2 +/- 2.5* days for control, CsA, and CsA+Zn groups, respectively (*p0.001 vs controls). In addition, 87.5% of allografts became tolerant and survived for 90 days in the CsA+Zn group compared with only 37.5% in the CsA-only group (p = 0.049).Zinc-mediated reduction of apoptosis served as an effective adjunct immunosuppressive therapy to CsA in a rat model of cardiac transplantation.
Published: 2002
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15. Feasibility of osteosynthesis of fractured cadaveric hips following preventive elastomer femoroplasty

Author: Edward R. Valstar, T.J. van der Steenhoven, Rob G H H Nelissen, S.K. van de Velde, and W. Schaasberg
Subjects: musculoskeletal diseases, Male, medicine.medical_specialty, Biophysics, Elastomer, Fracture Fixation, Internal, PDMS, Fracture prevention, Cadaver, Medicine, Humans, Femur, Displacement (orthopedic surgery), Orthopedics and Sports Medicine, Fixation (histology), Aged, Orthodontics, Aged, 80 and over, Hip fracture, Osteosynthesis, Hip, Polydimethylsiloxane, business.industry, Hip Fractures, Reproducibility of Results, medicine.disease, Surgery, Treatment Outcome, Elastomers, Contralateral hip fracture, Operative time, Feasibility Studies, Female, Stress, Mechanical, business, Cadaveric spasm
Abstract: Background In vitro cadaveric studies showed that elastomer femoroplasty prevents displacement of fracture parts after proximal hip fracture allowing for conservative treatment. In the event that secondary displacement does occur, the purpose of this present study was to determine the feasibility of performing osteosynthesis of a fractured hip after preventive treatment with elastomer femoroplasty. Methods Ten pairs of human cadaveric femurs were fractured in a simulated fall configuration. From each pair, one femur was randomly selected for elastomer femoroplasty prior to fracture generation and the contralateral femur was used as control. Following hip fracture generation, osteosynthesis was performed in all femurs. The operative time per case, technical difficulties during the procedure, and postoperative energy-to-failure load were recorded. Results The mean (SD) time to perform osteosynthesis was 20 (6) minutes in the control-group and 19 (5) minutes in the elastomer femoroplasty-group ( P = 0.69). During osteosynthesis of the fractured hip in the elastomer femoroplasty-group, no difficulties including the need for additional instruments to remove elastomer from the proximal femur were recorded. Postoperative energy-to-failure load was similar in the control-group and the elastomer femoroplasty-group. Conclusion Fixation with routine osteosynthesis of displaced cadaveric hip fractures is not hindered by the presence of previously injected elastomer.
Published: 2014

16. Influence of aneurysm wall stiffness and the presence of intraluminal thrombus on the wall movement of an aneurysm - an in vitro study

Author: Bart L. Kaptein, Jan-Willem Hinnen, Olivier H.J. Koning, Willem-Maarten Bosman, W H Kopp, Jaap F. Hamming, and T.J. van der Steenhoven
Subjects: in vitro study, Latex, intraluminal thrombus, Aortic Rupture, Blood Pressure, Wall stress, wall movement, Aneurysm, Vascular Stiffness, Wall stiffness, Elastic Modulus, medicine, In vitro study, Intraluminal thrombus, Humans, Radiology, Nuclear Medicine and imaging, cardiovascular diseases, Aorta, Abdominal, Thrombus, AAA, Netherlands, business.industry, Models, Cardiovascular, Stiffness, Thrombosis, General Medicine, Anatomy, medicine.disease, Biomechanical Phenomena, Compliance (physiology), Fluoroscopy, Photogrammetry, cardiovascular system, Surgery, Stress, Mechanical, medicine.symptom, Cardiology and Cardiovascular Medicine, business, Aortic Aneurysm, Abdominal, Compliance
Abstract: The purpose of this in vitro study was to investigate the influence of aneurysm wall stiffness and of the presence of intraluminal thrombus (ILT) on aneurysm wall movement. Three latex aneurysms were used with different wall stiffness. The aneurysms, equipped with 20 tantalum markers, were attached to an in vitro circulation model. Fluoroscopic roentgenographic stereo photogrammetric analysis was used to measure marker movement during six cardiac cycles at three different systemic pressures. To investigate the influence of ILT on wall movement, we repeated the same experiment with one of the aneurysms. The aneurysm sac was then filled with one of two E-moduli differing thrombus analogues (Novalyse 8 and 20) or with perfusate as a control. It was noted that the amplitude of the wall movement (mm) increased significantly ( P < 0.05) as the compliance of the wall increased. The mean amplitude of the wall movement decreased ( P < 0.05) as the stiffness ( E-modulus) of the ILT increased. In conclusion, ILT has a ‘cushioning effect’. Wall movement (and theoretically wall stress) diminishes when the stiffness of the ILT increases. Compliance of the aneurysm wall influences wall movement. When the stiffness of the wall increases, the wall movement diminishes.
Published: 2012

17. Thrombogenicity of a New Injectable Biocompatible Elastomer for Aneurysm Exclusion, Compared to Expanded Polytetrafluoroethylene in a Human Ex Vivo Model

Author: Jan M.M. Heyligers, F.L. Moll, T.J. van der Steenhoven, Michael J. Jacobs, P. G. De Groot, Claudia Tersteeg, Willem-Maarten Bosman, Surgery, and RS: CARIM School for Cardiovascular Diseases
Subjects: Adult, Male, medicine.medical_specialty, Time Factors, Thrombogenicity, Elastomer, Prosthesis Design, Fibrin, Injections, chemistry.chemical_compound, Blood Vessel Prosthesis Implantation, Young Adult, Platelet Adhesiveness, Customized Aortic Repair, Blood vessel prosthesis, PDMS, Platelet adhesiveness, medicine, Humans, EVAR, Platelet activation, Dimethylpolysiloxanes, Ex vivo, AAA, ePTFE, Polytetrafluoroethylene, Fibrinopeptide A, Medicine(all), biology, business.industry, Endovascular Procedures, Balloon catheter, Thrombosis, Surgery, Aortic Aneurysm, Blood Vessel Prosthesis, P-Selectin, chemistry, biology.protein, Microscopy, Electron, Scanning, Silicone Elastomers, Cardiology and Cardiovascular Medicine, business, Biomedical engineering
Abstract: Objectives Customized Aortic Repair (CAR) is a new concept for endovascular aortic aneurysm repair in which a non-polymerised elastomer is injected to fill the aneurysm sac around a balloon catheter. Amongst other variables, the thrombogenicity of the elastomer should be tested, before further clinical experiments can take place. The aim of this human ex vivo study was to measure the thrombogenicity of the elastomer and to compare it to expanded polytetrafluoroethylene (ePTFE). Design and materials In a validated ex vivo model, non-anticoagulated blood was drawn from the antecubital veins of 10 healthy donors with a 19-gauge needle. It was drawn through elastomer tubes and through ePTFE Gore-Tex vascular grafts, both 60 cm long and with an inner diameter of 3 mm. Methods Fibrinopeptide A (FPA) and P-selectin expression was measured in blood samples, collected at the end of the grafts. After the experiments, the deposition of platelets and fibrin onto the grafts was visualised by scanning electron microscopy. Results For these graft types, a progressive increase in FPA production was observed in time. No significant difference was observed between the elastomer and ePTFE grafts ( p > 0.05). No increase in P-selectin expression, and thereby no platelet activation, was observed in the perfusate of either grafts ( p > 0.05). By scanning electron microscopy, numerous platelet aggregates were observed on the ePTFE grafts, whereas just a few adhered platelets and no aggregates were observed in the elastomer grafts. Conclusions The elastomer in its current formulation has a low thrombogenicity, comparable to ePTFE, making it an ideal substance for endovascular aneurysm sac filling. Further research should clarify the feasibility of CAR in vivo .
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17 results on '"T.J. van der Steenhoven"'

1. Editor's Choice – Nationwide Analysis of Patients Undergoing Iliac Artery Aneurysm Repair in the Netherlands

2. Toward Optimizing Risk Adjustment in the Dutch Surgical Aneurysm Audit

3. Nationwide Study to Predict Colonic Ischemia after Abdominal Aortic Aneurysm Repair in The Netherlands

4. National Numbers of Secondary Aortic Reinterventions after Primary Abdominal Aortic Aneurysm Surgery from the Dutch Surgical Aneurysm Audit

5. A Composite Measure for Quality of Care in Patients with Symptomatic Carotid Stenosis Using Textbook Outcome

6. Nationwide study of the treatment of mycotic abdominal aortic aneurysms comparing open and endovascular repair in The Netherlands

7. Patients with a Ruptured Abdominal Aortic Aneurysm Are Better Informed in Hospitals with an 'EVAR-preferred' Strategy: An Instrumental Variable Analysis of the Dutch Surgical Aneurysm Audit

8. Failure to Rescue - a Closer Look at Mortality Rates Has No Added Value for Hospital Comparisons but Is Useful for Team Quality Assessment in Abdominal Aortic Aneurysm Surgery in The Netherlands

9. The Dutch Audit of Carotid Interventions: Transparency in Quality of Carotid Endarterectomy in Symptomatic Patients in the Netherlands

10. Cyclic loading of fractured cadaveric femurs after elastomer femoroplasty

11. Elastomer femoroplasty prevents hip fracture displacement

12. Aortic Customize: An In Vivo Feasibility Study of a Percutaneous Technique for the Repair of Aortic Aneurysms Using Injectable Elastomer

13. Augmentation with silicone stabilizes proximal femur fractures: An in vitro biomechanical study

14. Zinc chloride–mediated reduction of apoptosis as an adjunct immunosuppressive modality in cardiac transplantation

15. Feasibility of osteosynthesis of fractured cadaveric hips following preventive elastomer femoroplasty

16. Influence of aneurysm wall stiffness and the presence of intraluminal thrombus on the wall movement of an aneurysm - an in vitro study

17. Thrombogenicity of a New Injectable Biocompatible Elastomer for Aneurysm Exclusion, Compared to Expanded Polytetrafluoroethylene in a Human Ex Vivo Model

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17 results on '"T.J. van der Steenhoven"'

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