Intelligent pressure-control system with flexible and navigable suction ureteral access sheath combined with high-power holmium laser during flexible ureteroscopy for treating > 2 cm kidney stones: an initial experience
摘要
To investigate the safety and efficacy of intelligent pressure-control system with flexible and navigable suction ureteral access sheath (FANS-UAS) combined with high-power holmium laser during flexible ureteroscopy for the treatment of > 2 cm renal stones. Thirty-five patients were included. All patients underwent flexible ureterorenoscopy (f-URS) by utilizing the intelligent pressure-control system and FANS-UAS with a high-power holmium laser. Perioperative data, intraoperative irrigation fluid rate and intrarenal pressure (IRP) were recorded and analyzed. The median stone diameter and volume were 28.0 mm and 2423.9 mm³, respectively. The median stone density was 1212.0 HU. The median operative time and postoperative hospital stays were 55.0 min and 1 day, respectively. The median irrigation flow rate was 150.7 ml/min and the median IRP was 16.4 mmHg. The immediate SFR was 91.4% and the 3-month SFR was 97.1%. Twenty-six patients (74.3%) achieved complete clearance without residual fragments, and 6 patients (17.1%) had fragments smaller than 2 mm. One patient (2.9%) experienced postoperative fever and there were no cases of serious infections and other severe complications. Intelligent pressure-control system and FANS-UAS combined with high-power holmium laser during flexible ureteroscopy were effective and safe in the treatment of > 2 cm renal stones, providing a new option for the minimally invasive treatment of complex renal stones.