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Published on: May 10, 2013
Heterogeneity in gentamicin clearance between high-efficiency hemodialyzers
1Renal Division, Veterans Affairs Medical Center, Dallas, TX 75216.
Summary
Gentamicin removal during hemodialysis varies significantly between high-efficiency dialyzers. Cuprammonium rayon dialyzers showed superior gentamicin clearance compared to polysulfone, highlighting the need for drug level monitoring in dialysis patients.
Area of Science:
- Nephrology
- Pharmacology
- Biomedical Engineering
Background:
- Gentamicin, an aminoglycoside antibiotic, is crucial for treating gram-negative infections.
- Renal excretion necessitates dosage adjustments for gentamicin in hemodialysis patients.
- High-efficiency hemodialyzers may alter gentamicin clearance, requiring re-evaluation.
Purpose of the Study:
- To compare gentamicin dialysance between two high-efficiency hemodialyzers.
- To assess the impact of dialysis parameters on gentamicin removal.
- To evaluate the predictive value of dialysis dose on gentamicin clearance.
Main Methods:
- Randomized, controlled, cross-over study design.
- Comparison of cuprammonium rayon and polysulfone high-efficiency dialyzers.
- Measurement of gentamicin removal, Kt/V urea, K/V urea, and ultrafiltration.
Main Results:
- Significant differences in gentamicin removal were observed between dialyzer types despite comparable dialysis doses.
- Dialysis dose (Kt/V urea) predicted fractional gentamicin clearance for the TAF 175L dialyzer.
- Cuprammonium rayon dialyzers demonstrated superior middle molecule clearance compared to polysulfone dialyzers.
Conclusions:
- Gentamicin clearance varies substantially even between high-efficiency dialyzers.
- Cuprammonium rayon dialyzers may offer better gentamicin and middle molecule removal than polysulfone.
- Close monitoring of gentamicin drug levels is essential for hemodialysis patients.
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