ADAMTS13 Activity

Preferred specimen:	1.0 mL platelet-poor plasma, light blue (sodium citrate) top tube. Remove plasma from cells and transfer to a plastic transport tube. Freeze immediately. Separate specimens must be submitted when multiple tests are ordered.
Minimum specimen:	0.5 mL platelet poor plasma.
Unacceptable specimen:	Serum or EDTA plasma, clotted or hemolyzed specimens. Nonfrozen specimens.
Transport temp:	CRITICAL FROZEN
Methodology:	Chromogenic Assay
Unit Code:	801080
Ref Range:	Greater than or equal to 60 percent. ADAMTS13 levels of less than 10 percent may be associated with either inherited (Upshaw-Schulman Syndrome) or acquired thrombotic thrombocytopenic purpura (TTP).
Reported:	2-4 days
	ARUP Consult® Disease Topics Hemolytic Anemias Hypercoagulable States - Thrombophilia Thrombocytopenic Disorders Thrombotic Microangiopathies - TMA