Presentation Authors: Seth Bechis, San Diego, CA, Amy Krambeck*, Indianapolis, IN, Roger Sur, San Diego, CA, Brian Matlaga, Baltimore, MD
Introduction: In recent years there has been increasing utilization of single-use ureteroscopes. At present, though, there are few studies comparing the performance characteristics of these devices. Therefore, we performed a study comparing two commonly utilized single-use ureteroscopes in a porcine model.
Methods: A female pig (35kg) was placed under general anesthesia, positioned supine, and retrograde access to the renal collecting system was obtained. The LithoVue (Boston Scientific) and Pusen UScope(Pusen Medical) were evaluated by three experienced surgeons. The following parameters were assessed: time for navigation to the upper and lower pole calyces with and without implements (200 Î¼m laser fiber, 1.9F basket) in the working channel, a subjective evaluation of maneuverability and visualization from start to completion of the trial. Statistical analysis was performed with Mann Whitney U Test.
Results: Each surgeon performed a total of 35 passes with each ureteroscope. Navigation to the lower pole calyx was significantly faster (average time, seconds) with LithoVue compared to Pusen when the working channel was empty (24.3 vs. 49.4, p < 0.05), with a 1.9F basket (58.2 vs. 70.1, p < 0.05), and with a 200Î¼m fiber (63.6 vs. 94.4, p < 0.05). Navigation to the upper pole calyx was not significantly different with the 200Î¼m laser fiber (37.6 vs. 41.5, p=NS) and the empty working channel (50.4 vs. 35.7, p=NS), but was significantly faster with LithoVue with the 1.9F basket (75.3 vs. 106.8, p < 0.05). The assessments of navigation and scope optics are presented in Tables 1 and 2.
Conclusions: In an in vivo porcine model, the type of single-use ureteroscope employed affected the navigation times and subjective assessments of maneuverability and visualization. In all cases, LithoVue provided either equivalent or superior metrics than Pusen UScope. Further clinical studies are necessary to determine the implications of these findings.
Source of Funding: Boston Scientific