Application of new modified paracalculous uteteral catheter in ureteroscopic holmium laser lithotripsy

Abstract

Objective To explore the clinical application value of new modified paracalculous ureteral catheter in ureteroscopic holmium laser lithotripsy for the treatment of large middle and lower ureteral stone. Methods From January 2014 to January 2017, 86 patients with unilateral middle and lower ureteral large stone were treated in Jingzhou Central Hospital. By adopted to random digital table, 86 patients were randomly separated into two groups, all of whom were treated with ureteroscopic holmium laser lithotripsy. Forty-three cases were underwent new modified laser lithotripsy with ureteral catheter inserted beneath the stone. Normal saline was injected continuously through the catheter during lithotripsy procedure (modified lithotripsy group). Forty-three cases were underwent direct ureteroscopic holmium laser lithotripsy (direct lithotripsy group). The outcome data were compared between the two groups, such as the operation time, stone clearance rate, ureteral perforation, transit to open surgery, postoperative urinary sepsis, perirenal hematoma, ureterostenosis and other complications. Measurement data were expressed as (±s), and t test was used for comparison between groups. Results All the patients in the modified lithotripsy group were completed successfully without ureteral perforation, rupture, loss of lithotripsy channel, transit to open surgery, perirenal hematoma, and urinary sepsis and so on. In the direct lithotripsy group, there were 5 cases of ureteral perforation, 4 cases of lithotripsy channel loss, 6 cases of transit to open surgery, 2 cases of perirenal hematoma, 1 case of urinary sepsis. The operation time of the two groups was (39.5±7.2) min and (47.2±11.6) min, respectively, t=-4.975, P=0.001. Stone clearance rate was 100%, 91.1%. The patients in both groups received an average of 1 year out-patient follow-up. There were 3 cases of mild ureterostenosis in the modified lithotripsy group, which were not re-operated. In the direct lithotripsy group, there were 5 cases of mild ureterostenosis, and 2 cases of severe ureterostenosis, which were re-operated. Conclusion It is safe and effective to use the new modified paracalculous uteteral catheter in the ureteroscopic holmium laser lithotripsy of large middle and lower ureteral stone, which can shorten the total operation time and reduce the occurrence of complications. It has a higher clinical value. Key words: Ureteral calculi; Ureteroscopes; Urinary catheterization