The effect of temperature, time of storage, and presence of air bubbles in specimens for blood gas analysis was studied. The results show that air bubbles in a 10% proportion are undesirable because of significant elevation in the PO2, and the storage of anaerobic blood samples at room temperature (25 degrees C) is acceptable when measurements are done within the first 20 minutes.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1146247PMC
http://dx.doi.org/10.1136/jcp.33.9.864DOI Listing

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