Dr. Waise wrote:
Does anyone have information on the effect of transporting blood gas
speciemns via intra-hospital pneumatic systems on blood gas analysis
results? A reference would be helpful. Many thanks.
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See: Astles JR et al. Pneumatic transport exacerbates interference of room
air contamination in blood gas samples. Arch Pathol Lab Med
1996;120:642-647.
The title speaks for itself. Blood gas specimens should be carefully purged
of all air bubbles before transporting via pnematic tube system in order to
avoid changes in results. Largest effect is on PO2, particularly in samples
from hypoxemic patients; increases of 10 mm Hg (1.33 kPa) or greater) were
observed in samples with baseline PO2 < 85 mm Hg (< 11.3 kPa). Hope this is
helpful.
Sal Sena
Salvador F. Sena, Ph.D., DABCC
Associate Director, Clinical Chemistry and Toxicology
Department of Pathology and Laboratory Medicine
Danbury Hospital
Danbury, CT 06810
Tel 203-797-7705
Fax 203-731-8061
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