In vitro, in vivo, and clinical tests of a novel flexible ureteroscope for the diagnosis and treatment of kidney and ureteral diseasesopen access
- Authors
- Kim, Dai Hee; Shin, Jung Hyun; Choi, Se Young; You, Dalsan; Kim, Choung-Soo; Park, Hyung Keun
- Issue Date
- Sep-2018
- Publisher
- KOREAN UROLOGICAL ASSOC
- Keywords
- Lithotripsy; Nephrolithiasis; Ureteroscopes
- Citation
- INVESTIGATIVE AND CLINICAL UROLOGY, v.59, no.5, pp 328 - 334
- Pages
- 7
- Journal Title
- INVESTIGATIVE AND CLINICAL UROLOGY
- Volume
- 59
- Number
- 5
- Start Page
- 328
- End Page
- 334
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/71081
- DOI
- 10.4111/icu.2018.59.5.328
- ISSN
- 2466-0493
2466-054X
- Abstract
- Purpose: Despite advances in flexible ureteroscopy, the high cost and long repair time of ureteroscopes limit their use in the urology. We compared the performance of a novel flexible ureteroscope (fURS) 'HF-EH' with that of the two contemporary fURSs 'URF-P6' and 'COBRA'. Materials and Methods: We compared in vitro measurements of deflection angle, irrigation flow rate, and image quality between HF-EH and URF-P6 while also inspecting renal collecting systems in five female pigs. For clinical testing, we performed retrograde intrarenal surgeries using HF-EH in four patients. Experienced urologists compared performance parameters (irrigation, convenience, and maneuverability) between the HF-EH and COBRA. Results: The flow rate of HF-EH (21.0 mL/min) was worse, and its resolution (1.59 line pairs/mm) was inferior to that of URF-P6 (28.7 mL/min and 3.17 line pairs/mm, respectively). However, HF-EH was superior to URF-P6 in terms of loss of deflection angle with the insertion of accessories (1.8% vs. 12.7%). In vivo and clinical testing revealed that the performance parameters of HF-EH were slightly inferior to those of conventional domestic fURSs. We successfully performed retrograde intrarenal surgeries using HF-EH in four patients and achieved stone-free statuses in two. None of the patients exhibited any procedure-related complications. Conclusions: Although we observed that two of the three performance parameters of the novel ureteroscope 'HF-EH' were inferior to those of the conventional ureteroscope, we successfully used HF-EH to perform retrograde intrarenal surgeries in patients. Further studies on performance and durability are warranted for making HF-EH commercially available.
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