[Dialysate bacteriological quality in a health district]

Area of Science:

• Nephrology
• Clinical Microbiology
• Public Health

Background:

• Limited literature exists on dialysate quality in Spanish hemodialysis centers.
• Discrepancies among clinical guidelines regarding dialysate bacteriological quality criteria.
• Need for data on dialysate quality to ensure patient safety and treatment efficacy.

Purpose of the Study:

• To assess the bacteriological quality of dialysate used in hemodialysis units.
• To evaluate compliance with established standards for dialysate cultures and endotoxins.
• To identify potential areas for improvement in dialysate preparation and monitoring.

Main Methods:

• Descriptive observational study conducted monthly over one year at two hemodialysis units.
• Analysis of cultures and endotoxins in reverse osmosis-treated water and dialysate.
• Comparison of results with 2004 Association for Advancement of Medical Instrumentation (AAMI) recommendations.

Main Results:

• Reverse osmosis water showed good compliance for cultures and endotoxins at both units.
• Dialysate cultures met standards in Unit B (92% < 200 cfu/ml) but not Unit A (58% < 200 cfu/ml).
• Dialysate endotoxin levels exceeded recommendations, especially in Unit A (90% > 2 UE/ml).

Conclusions:

• Reverse osmosis water quality is adequate, but dialysate quality, particularly endotoxin levels, is a concern.
• Unit B demonstrated better compliance with bacteriological criteria for dialysate compared to Unit A.
• Further research is needed on endotoxin levels, monitor filters, and clinical impact in Spanish hemodialysis units.