9 results on '"Bolmers, M. D. M."'
Search Results
2. Diagnostic accuracy of doctors at the emergency department and radiologists in differentiating between complicated and uncomplicated acute appendicitis.
- Author
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Scheijmans, Jochem C G, Bom, Wouter J, Deniz, Rabia S, van Geloven, Anna A W, Boermeester, Marja A, Alberts, F, Bachiriden Bakker, S MA, Bisschops, B, Boersma, E, Bolmers, M D M, Bosman, W M, Bril, H, Buurman, C, Courrech Staal, E F W, Davids, P, Detering, R, Dijkgraaf, M G W, Dijkstra, B L, Drillenburg, P, and Dinaux, A more...
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APPENDICITIS diagnosis ,PREDICTIVE tests ,APPENDECTOMY ,DIAGNOSTIC imaging ,DIFFERENTIAL diagnosis ,COMPUTED tomography ,HOSPITAL emergency services ,APPENDICITIS ,LONGITUDINAL method ,CLINICAL competence ,RESEARCH ,SENSITIVITY & specificity (Statistics) - Abstract
Purpose: To determine the accuracy of final judgements of doctors at the emergency department (ED) and radiologists to differentiate between complicated and uncomplicated acute appendicitis, because these have different treatment options. Methods: This prospective, multicenter study included adult patients with imaging-confirmed acute appendicitis, operated with intention to appendectomy. Both doctors at ED and radiologists assessed appendicitis severity as a final judgement of "uncomplicated" or "complicated" appendicitis. Doctors at ED integrated clinical, laboratory, and imaging findings. Radiologists relied solely on imaging findings. Outcomes were accuracy of these judgements for diagnosis of complicated appendicitis compared to the reference standard by an adjudication committee. Results: After imaging, 1070 patients with confirmed acute appendicitis were included. Doctors at ED accurately labelled 656 of 701 (93.6%) patients with true uncomplicated appendicitis as uncomplicated, and 163 of 369 (44.2%) patients with true complicated appendicitis were labelled as complicated. Sensitivity, specificity, and positive and negative predictive values (PPV and NPV) for complicated appendicitis were 44.2%, 93.6%, and 78.4% and 76.1%, respectively. Comparable accuracy was found for the radiologist's assessment in 941 patients, with true positive rates of 92.2% (581 of 630 patients) for uncomplicated appendicitis and 46.6% (145 of 311 patients) for complicated appendicitis. Conclusion: More than half of all patients with true complicated appendicitis is incorrectly classified as uncomplicated appendicitis according to the judgements of doctors at ED, integrating clinical, laboratory, and imaging results, and of radiologists assessing diagnostic imaging. These judgements are thereby not sufficiently reliable in ruling out complicated appendicitis. [ABSTRACT FROM AUTHOR] more...
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- 2024
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3. Predictors for interval appendectomy in non-operatively treated complicated appendicitis
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de Jonge, J., Bolmers, M. D. M., Musters, G. D., van Rossem, C. C., Bemelman, W. A., and van Geloven, A. A. W.
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- 2019
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4. Prospective nationwide outcome audit of surgery for suspected acute appendicitis
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van Rossem, C. C., Bolmers, M. D. M., Schreinemacher, M. H. F., van Geloven, A. A. W., Bemelman, W. A., van Acker, G. J. D., Akkermans, B., Akkersdijk, G. J. M., Algie, G. D., Allema, J. H., Andeweg, C. S., Appeldorn, N., van Baal, J. G., den Bakker, C. M., Bartels, S. A. L., van den Berg, C., Boekestijn, B., den Boer, F. C., Boerma, D., van den Boom, A. L., Boute, M. C., Bouwense, S. A. W., Bransen, J., van Brussel, F. A., Busch, O. R. C., de Castro, S. M. M., Cense, H. A., Croese, C., van Dalen, T., Dawson, I., van Dessel, E., Dettmers, R., Dhar, N., Dohmen, F. Y. M., van Dongen, K. W., van Duijvendijk, P., Dulfer, R. R., Dwars, B. J., Eerenberg, J. P., van der Elst, M., van den Ende, E., Fassaert, L. M. M., Fikkers, J. T., Foppen, J. W., Furnee, E. J. B., Garssen, F. P., Gerhards, M. F., van Goor, H., Gorter, R. R., de Graaf, J. S., Graat, L. J., Groote, J., van der Ham, A. C., Hamming, J. F., Hamminga, J. T. H., van der Harst, E., Heemskerk, J., Heij, H. A., Heijne, A., Heikens, J. T., Heineman, E., Hertogs, R., van Heurn, E., van den Hil, L. C. L., Hoofwijk, A. G. M., Hulsker, C. C. C., Hunen, D. R. M., Ibelings, M. S., Klaase, J. M., Klicks, R., Knaapen, L., Kortekaas, R. T. J., Kruyt, F., Kwant, S., Lases, S. S., Lettinga, T., Loupatty, A., Matthijsen, R. A., Minnee, R. C., Mirck, B., Mitalas, L., Moes, D., Moorman, A. M., Nieuwenhuijs, V. B., Nieuwenhuijzen, G. A. P., Nijk, P. D., Omloo, J. M. T., Ottenhof, A. G., Palamba, H. W., van der Peet, D. L., Pereboom, I. T. A., Plaisier, P. W., van der Ploeg, A. P. T., Raber, M. H., Reijnen, M. M. P. J., Rijna, H., Rosman, C., Roumen, R. M. H., Schmitz, R. F., van der Velden, Schouten A. P., Schreurs, W. H., Sigterman, T. A., Smeets, H. J., Sonneveld, D. J. A., Sosef, M. N., Spoor, S. F., Stassen, L. P. S., van Steensel, L., Stortelder, E., Straatman, J., van Susante, H. J., de Hoog, Suykerbuyk D. E. N. M., van Scheltinga, Terwisscha C., Toorenvliet, B. R., Verbeek, B. M., Verbeek, P. C. M., Verseveld, M., Volders, J. H., Vriens, M. R., Vriens, P. W. H. E., Vrouenraets, B. C., van de Wall, B. J. M., Wegdam, J. A., Westerduin, E., Wever, J. J., Wijffels, N. A. T., Wijnhoven, B. P. L., Winkel, T. A., van der Zee, D. C., Zeillemaker, A. M., and Zietse, C. more...
- Published
- 2016
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5. Appendicular neoplasms and consequences in patients undergoing surgery for suspected acute appendicitis
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Bolmers, M. D. M., de Jonge, J., van Rossem, C. C., van Geloven, A. A. W., Bemelman, W. A., van Acker, G. J., Akkermans, B., Akkersdijk, G. J., Algie, G. D., Allema, J. H., Andeweg, C. S., Appeldoorn, N., van Baal, J. G., den Bakker, C. M., Bartels, S. A., van den Berg, C., Boekestijn, B., den Boer, F. C., Boerma, D., van den Boom, A. L., Boute, M. C., Bouwense, S. A., Bransen, J., van Brussel, F. A., Busch, O. R., de Castro, S. M., Cense, H. A., Croese, C., van Dalen, T., Dawson, I., van Dessel, E., Dettmers, R., Dhar, N., Dohmen, F. Y., van Dongen, K. W., van Duijvendijk, P., Dulfer, R. R., Dwars, B. J., Eerenberg, J. P., van der Elst, M., van den Ende, E., Fassaert, L. M., Fikkers, J. T., Foppen, J. W., van Heurn, E., Lases, S. S., Mirck, B., van der Peet, D. L., Terwisscha van Scheltinga, C., Westerduin, E., Surgery, Amsterdam Gastroenterology Endocrinology Metabolism, Paediatric Surgery, and Amsterdam Reproduction & Development (AR&D) more...
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medicine.medical_specialty ,Neuroendocrine tumors ,Appendix ,Malignancy ,Tumours of the digestive tract Radboud Institute for Health Sciences [Radboudumc 14] ,Internal medicine ,medicine ,Appendectomy ,Humans ,Neoplasm ,Prospective Studies ,Acute appendicitis ,business.industry ,Incidence (epidemiology) ,Gastroenterology ,Hepatology ,Appendicitis ,medicine.disease ,musculoskeletal system ,Surgery ,Neuroendocrine Tumors ,medicine.anatomical_structure ,Acute Disease ,embryonic structures ,Laparoscopy ,Original Article ,business ,Neuroendocrine tumors (NET) ,Cohort study - Abstract
Introduction In patients treated with an appendectomy for acute appendicitis, the specimen is generally sent for histological evaluation. In an era of increasing non-operative treatment for acute appendicitis, it is important to know the incidence, the diagnostic accuracy, and treatment consequences of appendicular neoplasms that are found in acute appendicitis. We hypothesize that pre- and intra-operative parameters might predict an appendicular neoplasm. Methods Data was used from our previous prospective observational cohort study. All patients undergoing surgery for suspected acute appendicitis were included. The primary outcome was the incidence of appendicular neoplasms in patients operated for acute appendicitis. Secondary outcomes were pre-operative diagnostics and imaging outcomes, intra-operative surgical judgment, and postoperative management and outcome. Possible predictors of an appendicular neoplasm were identified and used in multivariable logistic regression. Patients with an appendicular neoplasm were followed for 3 years after initial appendectomy. Results A total of 1975 patients underwent surgery for suspected acute appendicitis and in 98.3% (1941/1975) the appendix was removed. In 1.5% (30/1941) of these patients, an appendicular neoplasm was found. Among the malignant neoplasms, the majority were grade 1 neuroendocrine tumors (NET) in 65% (13/20). On pre-operative imaging, there was no suspicion of malignancy. In three cases, there was an intra-operative suspicion of malignancy. Multivariable analysis showed only age as an independent predictor for appendicular neoplasms. No recurrent or new malignancy was found during follow-up. Discussion The incidence of appendicular neoplasm in patients undergoing an acute appendectomy is very low and clinical risk factors could not be identified. more...
- Published
- 2020
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6. Appendicular neoplasms and consequences in patients undergoing surgery for suspected acute appendicitis
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Bolmers, M D M, de Jonge, J, van Rossem, C C, van Geloven, A A W, Bemelman, W A, Bolmers, M D M, de Jonge, J, van Rossem, C C, van Geloven, A A W, and Bemelman, W A
- Abstract
INTRODUCTION: In patients treated with an appendectomy for acute appendicitis, the specimen is generally sent for histological evaluation. In an era of increasing non-operative treatment for acute appendicitis, it is important to know the incidence, the diagnostic accuracy, and treatment consequences of appendicular neoplasms that are found in acute appendicitis. We hypothesize that pre- and intra-operative parameters might predict an appendicular neoplasm.METHODS: Data was used from our previous prospective observational cohort study. All patients undergoing surgery for suspected acute appendicitis were included. The primary outcome was the incidence of appendicular neoplasms in patients operated for acute appendicitis. Secondary outcomes were pre-operative diagnostics and imaging outcomes, intra-operative surgical judgment, and postoperative management and outcome. Possible predictors of an appendicular neoplasm were identified and used in multivariable logistic regression. Patients with an appendicular neoplasm were followed for 3 years after initial appendectomy.RESULTS: A total of 1975 patients underwent surgery for suspected acute appendicitis and in 98.3% (1941/1975) the appendix was removed. In 1.5% (30/1941) of these patients, an appendicular neoplasm was found. Among the malignant neoplasms, the majority were grade 1 neuroendocrine tumors (NET) in 65% (13/20). On pre-operative imaging, there was no suspicion of malignancy. In three cases, there was an intra-operative suspicion of malignancy. Multivariable analysis showed only age as an independent predictor for appendicular neoplasms. No recurrent or new malignancy was found during follow-up.DISCUSSION: The incidence of appendicular neoplasm in patients undergoing an acute appendectomy is very low and clinical risk factors could not be identified. more...
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- 2020
7. Diagnosing acute appendicitis: surgery or imaging?
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van Rossem, C. C., primary, Bolmers, M. D. M., additional, Schreinemacher, M. H. F., additional, Bemelman, W. A., additional, van Geloven, A. A. W., additional, Pinkney, T. D., additional, and Bhangu, A., additional more...
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- 2016
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8. Prospective nationwide outcome audit of surgery for suspected acute appendicitis
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van Rossem, C C, primary, Bolmers, M D M, additional, Schreinemacher, M H F, additional, van Geloven, A A W, additional, Bemelman, W A, additional, Acker, G J D, additional, Akkermans, B, additional, Akkersdijk, G J M, additional, Algie, G D, additional, Allema, J H, additional, Andeweg, C S, additional, Appeldorn, N, additional, Baal, J G, additional, Bakker, C M, additional, Bartels, S A L, additional, Berg, C, additional, Boekestijn, B, additional, Boer, F C, additional, Boerma, D, additional, Boom, A L, additional, Boute, M C, additional, Bouwense, S A W, additional, Bransen, J, additional, Brussel, F A, additional, Busch, O R C, additional, Castro, S M M, additional, Cense, H A, additional, Croese, C, additional, Dalen, T, additional, Dawson, I, additional, Dessel, E, additional, Dettmers, R, additional, Dhar, N, additional, Dohmen, F Y M, additional, Dongen, K W, additional, Duijvendijk, P, additional, Dulfer, R R, additional, Dwars, B J, additional, Eerenberg, J P, additional, Elst, M, additional, Ende, E, additional, Fassaert, L M M, additional, Fikkers, J T, additional, Foppen, J W, additional, Furnee, E J B, additional, Garssen, F P, additional, Gerhards, M F, additional, Goor, H, additional, Gorter, R R, additional, Graaf, J S, additional, Graat, L J, additional, Groote, J, additional, Ham, A C, additional, Hamming, J F, additional, Hamminga, J T H, additional, Harst, E, additional, Heemskerk, J, additional, Heij, H A, additional, Heijne, A, additional, Heikens, J T, additional, Heineman, E, additional, Hertogs, R, additional, Heurn, E, additional, Hil, L C L, additional, Hoofwijk, A G M, additional, Hulsker, C C C, additional, Hunen, D R M, additional, Ibelings, M S, additional, Klaase, J M, additional, Klicks, R, additional, Knaapen, L, additional, Kortekaas, R T J, additional, Kruyt, F, additional, Kwant, S, additional, Lases, S S, additional, Lettinga, T, additional, Loupatty, A, additional, Matthijsen, R A, additional, Minnee, R C, additional, Mirck, B, additional, Mitalas, L, additional, Moes, D, additional, Moorman, A M, additional, Nieuwenhuijs, V B, additional, Nieuwenhuijzen, G A P, additional, Nijk, P D, additional, Omloo, J M T, additional, Ottenhof, A G, additional, Palamba, H W, additional, Peet, D L, additional, Pereboom, I T A, additional, Plaisier, P W, additional, Ploeg, A P T, additional, Raber, M H, additional, Reijnen, M M P J, additional, Rijna, H, additional, Rosman, C, additional, Roumen, R M H, additional, Schmitz, R F, additional, Velden, A P Schouten, additional, Schreurs, W H, additional, Sigterman, T A, additional, Smeets, H J, additional, Sonneveld, D J A, additional, Sosef, M N, additional, Spoor, S F, additional, Stassen, L P S, additional, Steensel, L, additional, Stortelder, E, additional, Straatman, J, additional, Susante, H J, additional, Hoog, D E N M Suykerbuyk, additional, Scheltinga, C Terwisscha, additional, Toorenvliet, B R, additional, Verbeek, B M, additional, Verbeek, P C M, additional, Verseveld, M, additional, Volders, J H, additional, Vriens, M R, additional, Vriens, P W H E, additional, Vrouenraets, B C, additional, Wall, B J M, additional, Wegdam, J A, additional, Westerduin, E, additional, Wever, J J, additional, Wijffels, N A T, additional, Wijnhoven, B P L, additional, Winkel, T A, additional, Zee, D C, additional, Zeillemaker, A M, additional, and Zietse, C, additional more...
- Published
- 2015
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9. Diagnosing acute appendicitis: surgery or imaging?
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Rossem, C. C., Bolmers, M. D. M., Schreinemacher, M. H. F., Bemelman, W. A., Geloven, A. A. W., Pinkney, T. D., and Bhangu, A.
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APPENDICITIS diagnosis , *RADIATION exposure , *APPENDIX surgery , *COMPUTED tomography , *APPENDICITIS treatment - Abstract
Aim Investigation of suspected appendicitis varies widely across different countries, which creates variation in outcome for patients. Use of imaging drives much of this variation, with concerns over delay of imaging and radiation exposure of computed tomography being balanced against the risks of unnecessary surgery. Method Two national, prospective snapshot audits (UK n = 3326 and Netherlands n = 1934) reported investigation, management and outcome of appendicectomy and can be compared to generate treatment recommendations. Results Preoperative imaging was conducted in 32.8% of UK patients in contrast to 99.5% of patients in the Netherlands. A large difference in the normal appendicectomy rate was observed (20.6% in the UK vs 3.2% in the Netherlands) and the connection between these two outcome differences cannot be neglected. Conclusion This article discusses the role of imaging in the diagnostic work-up of patients who are suspected of acute appendicitis, comparing national snapshot studies as a model to do so. [ABSTRACT FROM AUTHOR] more...
- Published
- 2016
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