Boron diffusion across the dialysis membrane during hemodialysis

Area of Science:

• Nephrology
• Trace Element Metabolism
• Biochemistry

Background:

• Boron is an essential trace element, but its levels in patients with kidney disease require investigation.
• Understanding boron's behavior during hemodialysis is crucial for managing potential imbalances.
• Previous studies have not fully elucidated boron's diffusibility across dialysis membranes.

Purpose of the Study:

• To quantify boron removal during hemodialysis.
• To assess the filterability and clearance of boron across the dialysis membrane.
• To compare boron's removal rate with other common dialysis solutes.

Main Methods:

• Serum and dialysate boron levels were measured in 17 long-term hemodialysis patients.
• Inductively coupled plasma emission spectrometry was used for boron quantification.
• Boron levels were analyzed on both the inlet and outlet sides of the dialyzer.

Main Results:

• Approximately 77.8% of serum boron was filterable.
• 94.4% of filterable boron was removed during hemodialysis.
• Boron dialysance (138.6 +/- 16.1 ml/min) was significantly higher than creatinine and phosphorus clearance (p < 0.001).

Conclusions:

• Hemodialysis is an effective method for eliminating serum boron, even at low concentrations.
• Boron is easily diffusible across the hemodialysis membrane.
• Boron's diffusion appears independent of interactions with macromolecular serum constituents.