Straight versus Coiled Catheters in Patients with Peritoneal Dialysis: A Single‑Center Study

Background: This study aimed to evaluate and compare the clinical outcomes of straight catheters (SCs) and coiled catheters (CCs) inserted via the open surgical approach in patients undergoing peritoneal dialysis (PD).Methods: A retrospective analysis was conducted on 255 patients who underwent PD catheter placement between January 2017 and February 2021.Outcomes, including catheter-related complications and catheter survival, were compared between SC and CC groups.Predictive factors for PD-associated peritonitis were also analyzed.Results: Of the 255 patients, 206 received SCs and 49 received CCs.The overall complication rates-including dialysate leakage, hemorrhage, drainage failure, infections, and hernia-were similar between groups.Catheter migration was more frequent in the SC group (61.0% vs. 40.8%,p=0.015).Catheter survival was comparable, but the time to first peritonitis was significantly longer in the CC group (1354 vs. 755 days, p<0.001).SC use, postoperative hemorrhage, and prior abdominal surgery were associated with increased peritonitis risk.SC use remained an independent predictor in multivariate analysis (hazard ratio 3.955, p<0.001).Conclusion: SCs and CCs showed comparable overall outcomes.However, SC use was significantly associated with a higher risk of PD-related peritonitis.