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Clinical |
Dr. Lee Iu Cheung Memorial Renal Research Centre,1 Tung Wah Hospital, Department of Medicine, The University of Hong Kong, Hong Kong SAR; Nephrology Department,2 Peking Union Medical College Hospital, Beijing, China
Correspondence to: T. Yip, Department of Medicine, Tung Wah Hospital, 12 Po Yan Street, Hong Kong, China. terenceyip{at}netvigator.com
Background and Objective: The downward directed exit of
the swan neck catheter may decrease the risk of exit-site infection (ESI). The
percentage of migrations of the swan neck catheter seems to be less than the
conventional Tenckhoff catheter and the swan neck catheter is more expensive
and cannot be manipulated by guidewire technique if tip migration occurs. In
this study, the conventional Tenckhoff catheter was used. The straight tunnel
was converted to an arcuate one using the triple incision method, resulting in
a downward directed exit. The arcuate tunnel was created by passing the
catheter through an additional incision located between the paramedian
incision and the exit site. We compared the infective and mechanical
complications of the Tenckhoff catheter with a downward exit, implanted using
the triple incision method, with the swan neck catheter.
Patients and Methods: 101 new peritoneal dialysis
patients were prospectively randomized to receive either the Tenckhoff
catheter with a downward exit, implanted using the triple incision method, or
the swan neck catheter. Each patient was followed up for 24 months. 50
patients were in the triple incision method group (TIMG) and 51 were in the
swan neck catheter group (SNCG).
Results: Over a mean period of 18.9 ± 8.0 months
of follow-up, ESI occurred in 35 patients (70%) in TIMG and 37 patients
(72.5%) in SNCG (p = 0.83). The ESI rates were 0.71 and 1.0
episodes/catheter-year in TIMG and SNCG respectively (p = 0.21). The
peritonitis rates were similar in the 2 groups (0.64 episodes/year in TIMG and
0.68 episodes/year in SNCG, p = 0.47). More patients in TIMG had tip
migration [15 patients (30%) in TIMG vs 10 patients (19.6%) in SNCG] but the
difference was not statistically significant. Repositioning of the catheter by
guidewire manipulation was successful in patients in TIMG but not in SNCG.
Overall catheter survival at 12 and 24 months was 95% and 83% in TIMG and 93%
and 79% in SNCG respectively (p = 0.72).
Conclusion: By using the conventional Tenckhoff
catheter with a downward exit created using the triple incision method, high
catheter survival rates with infective and mechanical complication rates
similar to those of the swan neck catheter can be achieved. The triple
incision method has the additional advantages of lower cost and the catheter
can be manipulated by guidewire technique if tip migration occurs.
KEY WORDS: Dialysis catheter insertion; Tenckhoff catheter insertion; triple incision method; catheter implantation.
Received 20 October 2008; accepted 23 April 2009.
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