Call the Coagulation Laboratory for the adjusted tubes. Blood may be used from an arterial line or line flush with heparin provided the first 15 mL blood is drawn and discarded before Coagulation studies are collected. Please indicate such specimens. All Coagulation tests are sensitive to heparin contamination to some degree. Causes for rejection Specimen clotted, diluted with IV fluid, hemolyzed, or contaminated with heparin, tubes overfilled or underfilled, excessive delay in transpost.
Reference range See individual tests.