The Impact of Preoperative JJ Stent Diameter on Retrograde Intrarenal Surgery: A RIRSearch Group Study

Area of Science:

• Urology
• Surgical Technology
• Medical Devices

Background:

• Preoperative ureteral stenting is common in retrograde intrarenal surgery (RIRS).
• The impact of double-J (JJ) stent diameter on ureteral access sheath (UAS) insertion and RIRS outcomes is not well-established.
• UAS insertion is often simpler with preoperative ureteral stents.

Purpose of the Study:

• To investigate the relationship between preoperative JJ stent diameter and UAS placement success.
• To evaluate the effect of JJ stent caliber on RIRS outcomes, including stone-free rates and complications.

Main Methods:

• A retrospective analysis of 655 patients undergoing RIRS with preoperative JJ stents.
• Patients were divided into two groups based on JJ stent diameter: 4.8 Fr and 6 Fr.
• Comparison of demographic data, stone characteristics, surgical outcomes, complications, and stone-free rates (SFRs).

Main Results:

• No significant differences were observed in SFRs, UAS insertion rates, hospitalization duration, or complication rates between the 4.8 Fr and 6 Fr JJ stent groups.
• A statistically significant higher success rate for placing larger caliber UAS was found with the 6 Fr JJ stent (P = .001).
• Operation time was significantly shorter in the 6 Fr JJ stent group (P = .003).

Conclusions:

• Preoperative JJ stent diameter does not significantly impact overall UAS insertion success, complication rates, or postoperative stone-free status.
• Utilizing a 6 Fr JJ stent facilitates the placement of larger UAS and may reduce operative time.
• While both 4.8 Fr and 6 Fr stents are effective, a 6 Fr stent may offer procedural advantages in RIRS without compromising safety or efficacy.