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Bacterial endotoxin retention by inline intravenous filters
American Journal of Hospital Pharmacy
|March 1, 1986
Summary
This study evaluated intravenous (IV) administration set filters for bacterial endotoxin retention. Only Posidyne Nylon 66 filters effectively retained endotoxins from Escherichia coli for 96 hours.
Area of Science:
- Medical Devices
- Microbiology
- Biochemistry
Background:
- Bacterial endotoxins pose a risk during intravenous (IV) infusions.
- Effective filtration is crucial for preventing endotoxin contamination in IV therapy.
Purpose of the Study:
- To assess the efficacy of various inline IV filters in retaining bacterial endotoxins over 96 hours of continuous infusion.
- To identify filters capable of preventing endotoxin passage during prolonged IV administration.
Main Methods:
- Continuous infusion of 5% dextrose with Escherichia coli inoculum was used.
- Inline filters (cellulose ester, polyacrylate, polypropylene, polyethylene, Posidyne Nylon 66) were tested.
- Effluent sterility and endotoxin levels (Limulus Amebocyte Lysate assay) were monitored up to 96 hours.
Main Results:
- All filters maintained sterile effluent throughout the 96-hour study.
- Only Posidyne Nylon 66 filters successfully retained bacterial endotoxins for the entire 96-hour period.
- Other filter types allowed endotoxin passage shortly after bacterial injection.
Conclusions:
- Posidyne Nylon 66 demonstrates superior endotoxin retention capabilities for long-term IV infusions.
- Further research is recommended with various microorganisms relevant to IV infusion contamination.