The value of continuous drainage outside the ureteric access sheath to prevent Systemic inflammatory response syndrome in flexible ureterscopy

Objective To evaluate the clinical value of continuous drainage outside the ureteric access sheath to prevent SIRS in flexible ureterscopy. Methods December 2015 to May 2018, 300 eligible patients with surgical indications were randomly divided into control and experimental groups. Constant drainage outside the ureteric access sheath was performed add to conventional flexible ureterscopy in the experimental group. The incidence of SIRS and residual stone, operation time, duration of hematuria, hospitalization stay, results of lab examination were analyzed. Results A total of 276 patients completed this study. No residual stone was found in both groups. The incidence of SIRS and fever, duration of hematuria, and hospitalization stay in the experimental group were significantly improved compared with those in control groups(P<0.05). Due to the constant drainage, the operation time was reduced in those patients who surffered stones longer than 2 cm(P<0.05). Conclusions The continuous drainage outside the ureteric access sheath is not only helpful to reduce the incidence of postoperative infection, the duration of hematuria and hospitalization stay, and has a certain value to save operation time in patients with upper urinary tract stones>2 cm. Key words: Urinary Calculi; Ureteroscopy; Drainage; Systemic Inflammatory Response Syndrome