CAPD disconnect systems: UK peritonitis experience

Area of Science:

• Nephrology
• Infectious Diseases
• Medical Devices

Background:

• Peritonitis is a significant complication in patients undergoing peritoneal dialysis.
• Disconnect systems aim to reduce infection rates by minimizing contamination during exchanges.
• The 'Flush Before Fill' principle is a key feature of modern disconnect systems.

Purpose of the Study:

• To evaluate the clinical outcomes, specifically peritonitis rates and causative organisms, associated with two different disconnect systems (Freeline and Solo).
• To compare the effectiveness of Freeline (F) and Solo (S) systems in preventing peritonitis across various clinical settings and patient populations.
• To correlate peritonitis incidence with system selection criteria and patient characteristics.

Main Methods:

• A retrospective review of peritonitis data (rates, organisms, recurrences) was conducted over 12 months in four UK dialysis units.
• Data were analyzed based on the disconnect system used (Freeline vs. Solo), by individual unit, and in total.
• Units employed varying criteria for system selection, including patient choice and specific population focus (e.g., blind diabetics).

Main Results:

• Peritonitis incidence varied between units and systems, with specific rates detailed in the study.
• The Solo (S) system demonstrated a potential for achieving a low incidence of peritonitis, particularly infections caused by Staphylococcus epidermidis.
• The study suggests a relationship between patient-to-system selection criteria and the overall peritonitis rates observed.

Conclusions:

• Achieving a low incidence of peritonitis, especially S. epidermidis infections, is feasible with disconnect systems like Solo (S).
• Patient and system selection criteria appear to be significant factors influencing peritonitis rates.
• Further investigation is needed regarding the impact of recurrent peritonitis (R) and specific technical issues (ES/TI).