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Updated: Jul 14, 2026

Endotoxin Activity Assay for the Detection of Whole Blood Endotoxemia in Critically Ill Patients
Published on: June 24, 2019
[The level of endotoxins in hemodialysis water and dialysate]
Inga Skarupskiene1, Inga Arūne Bumblyte, Vytautas Kuzminskis
1Department of Nephrology, Kaunas University of Medicine, Kaunas, Lithuania. i.skarupskiene@mikrovisata.net
Unlabelled:
Hemodialysis is a process when the blood of patients contacts with dialysate through a semipermeable membrane. Water used for dialysis is not sterile. Microorganisms cannot pass through the membrane pores, but bacterial endotoxins can diffuse to the blood of patients. Several acute and long-term complications (pyrogenic reactions, silent chronic inflammation, malnutrition) in dialysis patients might be associated with dialysate contamination. The aim of this study was to determine the level of endotoxins in hemodialysis water and dialysate in several hemodialysis centers of different Lithuanian cities.
Material And Methods:
Material was dialysis water (n=6) and dialysate (n=14) from six hemodialysis centers in three different cities of Lithuania. Bacterial endotoxin levels were measured using a sensitive Limulus Amebocyte Lysate (LAL) assay.
Results And Conclusions:
The level of endotoxins was less than 0.25 endotoxin unit (EU)/mL in all hemodialysis water (n=6) and dialysate (n=14) samples. One sample of water (16.7%) and two of dialysate (14.3%) had the level of endotoxins above 0.03 EU/mL. Therefore, the level of endotoxins in hemodialysis water and dialysate in studied Lithuanian hemodialysis centers (n=6) complied with the recommendations of the European Pharmacopoeia and the ERA-EDTA best practice guidelines for conventional dialysis modalities. The level of endotoxins in dialysate of five Lithuanian hemodialysis centers complied with the recommendations of the ERA-EDTA best practice guidelines for ultrapure dialysate.
Insights
Bacterial endotoxin levels in hemodialysis water and dialysate were below recommended limits in Lithuanian centers. This suggests current practices effectively control endotoxin contamination, safeguarding patients undergoing hemodialysis.
Area of Science:
- Nephrology
- Microbiology
- Public Health
Background:
- Hemodialysis involves blood-purifying fluid (dialysate) and water, which can harbor bacterial endotoxins.
- Endotoxins may diffuse into patient blood, potentially causing severe health complications during dialysis.
Purpose of the Study:
- To assess endotoxin levels in hemodialysis water and dialysate across multiple Lithuanian centers.
- To evaluate compliance with established European safety guidelines.
Main Methods:
- Collected samples of dialysis water (n=6) and dialysate (n=14) from six centers in three Lithuanian cities.
- Quantified bacterial endotoxin levels using the Limulus Amebocyte Lysate (LAL) assay.
Main Results:
- All samples showed endotoxin levels below 0.25 EU/mL.
- A small percentage of water (16.7%) and dialysate (14.3%) samples exceeded 0.03 EU/mL.
Conclusions:
- Endotoxin levels in the studied hemodialysis centers met European Pharmacopoeia and ERA-EDTA guidelines for conventional dialysis.
- Dialysate quality in most centers also aligned with standards for ultrapure dialysate.
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