The effects of heparin anticoagulants and fill volume in blood gas syringes on ionized calcium and magnesium measurements.

Abstract

We studied the effects of several heparin anticoagulants on ionized calcium and ionized magnesium measurements. Venous blood from 24 healthy donors was drawn into 20-ml syringes without an anticoagulant, and immediately analyzed for control results. They were then transferred to completely fill and half-fill each of four brands of syringes, and an evacuated… (More)

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