Serum Osmolality

Blood Osmolality Test, Osmolality Test

What Affects the Test

Results from a serum osmolality test may be affected by:

• Drinking alcohol before the test.
• Recently receiving a blood transfusion.

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Author:	Maria G. Essig, MS, ELS	Last Updated: November 27, 2007
Medical Review:	Caroline S. Rhoads, MD - Internal Medicine David C.W. Lau, MD, PhD, FRCPC - Endocrinology & Metabolism
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