Evaluation of a Single-Use Flexible Cystoscope: A Multi-Institutional International Study.

Introduction: Acquisition costs and prohibitively expensive technical support for endoscope maintenance, repair, and reprocessing have deterred adoption of flexible cystoscopes by many urologists internationally. This study evaluated the performance of a novel single-use digital cystoscope that can directly connect to a laptop or computer monitor for visualization, obviating the need for a tower. Materials and Methods: The performance characteristics of flexible single-use cystoscopes (NeoScope) were prospectively evaluated vs a reusable flexible cystoscope (Olympus) in three clinical cases and two independent benchtop testing episodes in Canada. Cystoscope maneuverability, imaging, deflection, irrigation, and ease of use of instrumentation were investigated. Additional investigations were performed during clinical use in Zimbabwe (7 patients), Egypt (10 patients), and Dominica (5 patients). Results: Bench testing revealed smaller tip diameter (4.06 vs 6.09 mm) and shorter (35.4 vs 38 cm) single-use cystoscopes vs reusable cystoscopes. Deflection of the single-use scope was superior with an empty working channel (230 up/220 down) vs the reusable (195 up/95 down) but showed a more substantial decrease in deflection on placement of instruments including a grasper. Clinical use revealed satisfactory maneuverability, ease of use of instruments, deflection, and visualization. Conclusions: Benchtop testing performance of the single-use digital flexible cystoscopes was inferior compared with reusable digital cystoscopes. However, these single-use endoscopes offer adequate illumination, imaging, and maneuverability. Direct connection to any computer monitor allowed truly portable use, allowing for treatment of patients in a variety of clinical settings without the need for ancillary equipment.

Urolithiasis location and size and the association with microhematuria and stone-related symptoms.

PURPOSE: To conduct a study to assess the association between calculus location and size and the incidence of both microhematuria and symptoms of urolithiasis in a urology office environment. PATIENTS AND METHODS: After Institutional Review Board approval, a prospective study was conducted with data from 100 consecutive patients who presented to our office with documented urolithiasis. The location (caliceal, pelvic, or ureteral) and size (