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Chest, Vol 103, 1120-1122, Copyright © 1993 by American College of Chest Physicians

ARTICLES

Stability of blood gases in ice and at room temperature

HP Liss and CP Payne Jr
Wright State University School of Medicine, Veterans Affairs Medical Center, Dayton, Ohio.

Arterial blood samples from 75 patients were analyzed for PO2, PCO2, and pH at 0, 15, and 30 min. After the baseline analysis, 60 samples were kept in ice while 59 samples were left at room temperature. There was a statistically significant increase in the PO2 at 15 min and again at 30 min in both groups. There was a statistically significant decrease in the PCO2 at 15 min in both groups. There were no further changes in the PCO2 at 30 min in either group. There was a statistically significant decrease in the pH at 15 min in both groups. There was a further statistically significant decrease in the pH at 30 min in the group of blood samples left at room temperature but not in those in ice. There is no reason to keep arterial blood in ice if blood gas analysis is done within 30 min.


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Copyright © 1993 by the American College of Chest Physicians.