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Evolution of Single-Use Urologic Endoscopy: Benchtop and Initial Clinical Assessment of a New Single-Use Flexible Cystoscope.

Introduction Office cystoscopy is one of the most frequently performed procedures by a urologist. However, single-use cystoscopes remain quite undeveloped. Ambu® has developed single-use broncoscopes, rhinolaryngoscopes and duodenoscopes. Recently, they released a single-use cystoscope. In this study, we performed a benchtop and initial clinical assessment of the Ambu® aScope™ (4) Cysto single-use cystoscope. Methods Ten new, never-used Ambu® aScope™ (4) Cysto single-use cystoscopes were assessed for optical performance, maximal tip flexion and irrigation flow rate with empty working channel, 365μm laser fiber, 0.035in hydrophilic-tipped wire, 1.9Fr nitinol basket and a 1.8mm flexible stent grasper. All cystoscopes were then fully flexed 25 times in each direction, and maximal flexion angles were re-measured with and without instruments. Optical resolution, distortion, and depth of field was measured and compared to our reusable digital flexible cystoscopes. Assessment of clinical use was performed for inpatient bedside procedures using a Likert feedback survey and the NASA Task-Load-Index. Results Maximal upward flexion exceeded 200○ and 160○ for all working instruments in upward and downward flexion. Downward flexion demonstrated different flexion between instrument groups in pre- and post-cycling (p<0.001). There was no clinical difference between the pre- or post-cycling flexion. Flow rate decreased with increasing working instrument size (p<0.001). The Olympus HD cystoscope resolution was superior at 3mm and 5mm distance, but not at other distances. The Ambu® scope was superior to the Olympus SD scope at all distances except 3mm. The aScope™ (4) Cysto had higher Likert scale survey scores for clinical use. Conclusions The new Ambu® single-use cystoscope demonstrates good flexion across instruments and comparable optics to reusable cystoscopes. Additionally, initial inpatient bedside use of the aScope™ (4) Cysto and Monitor system compares favorably to the Olympus reusable cystoscope. Further testing in clinical scenarios such as hematuria, urothelial carcinoma and operative endoscopy is warranted.

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Whelan, Patrick, Christopher Kim, Christian Tabib, Glenn M. Preminger, and Michael Eric Lipkin. “Evolution of Single-Use Urologic Endoscopy: Benchtop and Initial Clinical Assessment of a New Single-Use Flexible Cystoscope.” J Endourol, July 8, 2021. https://doi.org/10.1089/end.2021.0219.

Published Date: 
Thursday, July 8, 2021
Published In: 
J Endourol
PMID: 
34235971