How to record peritoneal catheter infections

Area of Science:

• Nephrology
• Infectious Diseases
• Medical Device Technology

Background:

• Discrepant definitions of exit-site infections (ESI) and tunnel infections (TI) hinder comparative analysis of infection rates in peritoneal dialysis (PD).
• Existing monitoring and reporting systems for ESI/TI, such as those proposed by Twardwski et al. and Nolph et al., have limitations.

Purpose of the Study:

• To prospectively evaluate a combined system for monitoring and reporting exit-site infections and tunnel infections in peritoneal dialysis patients.
• To propose a unified classification for catheter-related infections to improve data comparability across PD units.

Main Methods:

• A prospective study involving 127 PD patients and 147 double-cuff peritoneal catheters (PCs) from January 1992 to December 1995.
• Defined tunnel infection (TI) to include external-cuff infection (ECI), inter-cuff segment infection (ICSI), and internal-cuff infection (ICI).
• Combined and evaluated existing ESI/TI monitoring systems.

Main Results:

• 64 PCs (43.5%) experienced infections.
• 38 PCs (25.8%) had acute peritoneal catheter infection (PCI) and 26 PCs (17.7%) had chronic PCI.
• External-cuff infection (ECI) was consistently observed with ESI in infected PCs and proposed as a classification for TI.

Conclusions:

• The proposed combined approach is beneficial for ESI monitoring but requires refinement for TI.
• Standardized classification systems and highly trained personnel are essential for accurate comparison of infection data between PD centers.
• External-cuff infection should be classified as a tunnel infection for improved clarity and reporting.