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Special considerations
Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others. If puncturing the vein is difficult, injury to the red blood cells may cause potassium to be released from them, causing a falsely high result.
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Reviewer Info: Robert Mushnick, M.D., Clinical Assistant Professor, Department of Nephrology, SUNY Downstate Health Center, Brooklyn, NY. Review provided by VeriMed Healthcare Network.; ADAM Health Illustrated Encyclopedia, 05/15/2007 |
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