Initial experience of domestic disposable digital flexible ureteroscope in the treatment of upper urinary tract stones / 中华泌尿外科杂志

ABSTRACT

Objective:To introduce the preliminary experience of domestic disposable digital flexible ureteroscope (ZebraScope?)in the treatment of upper urinary calculi.Methods:The clinical data of 16 patients with upper urinary calculi treated by ZebraScope? in our hospital from February to March 2020 were retrospectively analyzed. The scope is composed of a handle and shaft, the image can be transferred through the transmission line at the end of the handle. There were 10 males and 6 females. The mean age was 42.1 years (26-63 years). 12 cases of upper ureteral calculi and 4 cases of renal calculi included. Mean diameter was 1.3cm (0.8-2.1cm). Ureteral stents were preoperatively placed in 4 patients and no pre-stent were in 12 patients. Two patients had a history of endoscopic lithotripsy. The ureteral sheath was used in 4 patients with F12/14, 10 patients with F11/13, and 2 patients with F10/12. Eight patients were treated with a stone basket. Intra-operative lithotripsy was performed using 200um optical fiber combined with holmium laser, and 6Fr ureteral stent was routinely indwelling for 2-4 weeks. The operation time, postoperative complications, hospital-in time, stone clearance rate and other related parameters were summarized and analyzed.Results:Of the 16 patients, 14 succeed and 2 patients failed and secondary operation was applied due to poor ureteral condition. The mean operative time was 55.6 minutes (32-115 minutes). The average laser emission time was 25.2 minutes (10-65 minutes). There was no image degradation and scope damage during the operation. All the patients recovered well after the operation, and no postoperative complications such as fever and pain occurred. Two patients received external physical vibration lithecbole therapy. The average hospital-in time was 1.2 days (1-3 days). One month after the operation, the calculi clearance rate was 87.5% (14/16).Conclusion:Our preliminary study found that ZebraScope? could be safe and effective in the treatment of upper urinary calculi less than 2 cm. Futhter verification is required in larger renal stones.