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Clinical Chemistry 9: 340-346, 1963;
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Clinical Chemistry, Vol 9, 340-346, Copyright © 1963 by the American Association for Clinical Chemistry

Capillary Blood pH by a Dilution Technic

Arnold G. Ware 1, Jacques Nowack 1, and Leola Westover 1

1 Main Laboratory and the Children's Division of Los Angeles County Hospital, the Department of Biochemistry, University of Southern California School of Medicine, and the Department of Pediatrics, Loma Linda University, Calif.

A technic is described for collecting arterialized capillary blood in a small heparinized polyethylene centrifuge tube. The rhoH is measured after dilution and injection into a Beckman micro blood rhoH Assembly. Dilution of the blood with saline results in an average increase of 0.027 rhoH units. This change in rhoH on dilution is eliminated by inclusion of calcium in the diluent.

The rhoH of capillary blood drawn and measured as described does not differ significantly from that of undiluted arterial blood drawn from the same patient.

Submitted on April 2, 1962






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Copyright © 1963 by the American Association for Clinical Chemistry.