Nephrol Dial Transplant (2001) 16: 341-347
© 2001 European Renal Association-European Dialysis and Transplant Association
Do the Y-set and double-bag systems reduce the incidence of CAPD peritonitis?
A systematic review of randomized controlled trials
1 Department of Medicine and Therapeutics, 2 Health Services Research Unit, 3 Health Economics Research Unit, 4 Medical School Library, University of Aberdeen, Aberdeen, UK 5 Current address: Departments of Economics and Community Health Sciences, University of Calgary, Canada
Background. Peritonitis is the most frequent serious complication of continuous ambulatory peritoneal dialysis (CAPD). It has a major influence on the number of patients switching from CAPD to haemodialysis and has probably restricted the wider acceptance and uptake of CAPD as an alternative mode of dialysis. This systematic review sought to determine if modifications of the transfer set (Y-set or double-bag systems) used in CAPD exchanges are associated with a reduction in peritonitis and an improvement in other relevant outcomes.
Methods. Based on a comprehensive search strategy, we undertook a systematic review of randomized or quasi-randomized controlled trials comparing double-bag and/or Y-set CAPD exchange systems with standard systems, or comparing double-bag with Y-set systems, in patients with end-stage renal disease (ESRD) treated with CAPD. Only published data were used. Data were abstracted by a single investigator onto a standard form and subsequently entered into Review Manager 4.0.4. Its statistical package, Metaview 3.1, calculated an odds ratio (OR) for dichotomous data and a (weighted) mean difference for continuous data with 95% confidence intervals.
Results. Twelve eligible trials with a total of 991 randomized patients were identified. In trials comparing either the Y-set or double-bag systems with the standard systems, significantly fewer patients (133/363 vs 158/263; OR 0.33, 95% CI 0.24–0.46) experienced peritonitis and the number of patient-months on CAPD per episode of peritonitis was consistently greater. When the double-bag systems were compared with the Y-set systems significantly fewer patients experienced peritonitis (44/154 vs 66/138; OR 0.44, 95% CI 0.27–0.71) and the number of patient-months on CAPD per episode of peritonitis was also greater.
Conclusions. Double-bag systems should be the preferred exchange systems in CAPD.
Keywords: CAPD; double bag; peritonitis; randomized controlled trials; systematic review; Y-set
Correspondence and offprint requests to: Conal Daly, Department of Medicine and Therapeutics, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK.
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