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fasting specimen |
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fasting specimen Lab medicine A blood specimen drawn from a Pt who has not eaten for 12 hrs; fasting is an absolute requirement for a limited number of tests–eg, GTT; prolonged fasting causes a marked–240% ↑ in bilirubin,
↑ plasma TGs, glycerol and free fatty acids, and a marked–± 50% ↓ in glucose. See Glucose tolerance test. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Fasting specimens must be collected after a 10- to 12-hour complete dietary restriction of everything except water and medications. A basal-state lipid profile fasting specimen determined by fasting overnight for nine to 12 hours is recommended for collection of a specimen for measurement of the lipid profile of total cholesterol, triglyceride, and HDL cholesterol, mainly because of the highly variable triglyceride diurnal variation. |
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