Publications by authors named "Jaap D Legemate"

Surgical outcomes are dependent on multiple factors. Besides patient-related or procedure-related factors, several surgeon-related factors contribute to surgical outcomes. The Surgery Task Load Index (SURG-TLX) questionnaire helps to assess the impact of several stressors on the perceived demands of surgeons during surgery.

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To evaluate the diagnostic yield and concordance of upper tract urothelial carcinoma (UTUC) grading between ureterorenoscopic biopsies and surgical resections. The nationwide Dutch Pathology Registry (nationwide network and registry of histo- and cytopathology in the Netherlands [PALGA]) was searched for UTUC-positive renal units (RUs) with histopathology excerpts from ureterorenoscopic biopsies and surgical resections, matched for laterality and localization of the tumor, from 2011 until 2018. The positive predictive value (concordance) of the biopsy grade with regard to the final grade according to the World Health Organization (WHO) 2004 classification was calculated.

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Objectives: To investigate the diagnostic accuracy, inter-rater and intrarater agreement of grade predictions based on the visual appearance of papillary upper tract urothelial carcinoma (UTUC) during digital ureteroscopy.

Methods: Nine urologists predicted the histopathologic grade of 64 papillary UTUC (low-grade vs high-grade) by assessing the visual appearance of the tumors in videos from digital ureteroscopy. The diagnostic accuracy was estimated by comparing the grade predictions with the histopathology from colocalized biopsies.

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Purpose: We assessed the frequency of preoperative and persistent microbial contamination of flexible ureteroscopes after reprocessing and the relation of contamination to cumulative ureteroscope use.

Materials And Methods: We evaluated the effectiveness of high level disinfection with peracetic acid as well as data on ureteroscope use for 20 new flexible ureteroscopes from December 2015 to December 2017 at a single center. In the operating room pre-use and postuse microbial samples of the ureteroscope shaft and working channel were collected to evaluate microbial contamination after reprocessing.

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Purpose: To evaluate the opinion of urologists and their audience regarding patient safety and educational value of live surgical demonstrations (LSD) and semi-live surgical demonstrations (semi-LSD).

Methods: Following the '2017 Challenges in Endourology' meeting, a survey addressing patient safety and the educational value of LSD and semi-LSD was disseminated online to all participants. Survey outcomes of LSD and semi-LSD were compared.

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Background: Flexible ureteroscopy is an established treatment modality for evaluating and treating abnormalities in the upper urinary tract. Reusable ureteroscope (USC) durability is a significant concern.

Objective: To evaluate the durability of the latest generation of digital and fiber optic reusable flexible USCs and the factors affecting it.

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Objective: To evaluate patients' characteristics, surgical procedure data, and outcomes of ureterorenoscopy (URS) stone treatment in patients with a horseshoe kidney (HSK), ectopic kidney (EK), and malrotated kidney (MK).

Materials And Methods: This study is a subanalysis of the Clinical Research Office of the Endourological Society URS Global Study, which was a prospective multicenter observational study, collecting data on URS stone treatment from consecutive patients over a 1-year period. A total of 114 centers in 32 countries participated.

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To determine the stone-free rates and intra- and postoperative complication rates and grades of ureterorenoscopic stone treatment in patients with a solitary kidney. This study is a subanalysis of the Clinical Research Office of the Endourological Society (CROES) ureterorenoscopy (URS) study, which is a prospective international multicenter observational study. Over a 1-year period, consecutive patients treated with ureterorenoscopy for urinary stones were included.

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Purpose: To compare intra- and post-operative outcomes of endourological live surgical demonstrations (LSDs) and routine surgical practice (RSP) for urinary stones.

Methods: Consecutive ureterorenoscopic (URS) and percutaneous (PNL) urinary stone procedures over a 5-year period were reviewed. Procedures were divided into LSDs and RSP.

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Purpose: To describe stone-free rates and complications of ureteroscopic treatment for impacted compared with non-impacted ureteral stones and evaluate predictive variables for impaction.

Methods: The Clinical Research Office of the Endourological Society prospectively collected 1 consecutive year of data from 114 centers worldwide. Patients eligible for inclusion were patients treated with ureteroscopy for ureteral stones.

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