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362: Factor XII Activity, Clotting [362] Print View
Factor XII Activity, Clotting CLOT DET  50 - 150  % normal 

PRIMARY
1 Plasma Citrated 1 (0.5) mL   Frozen - 14 Day(s)  
ALTERNATE

This test is useful to evaluate a prolonged aPTT. Deficiency of Factor XII is not correlated with bleeding risk.

Platelet-poor plasma: Centrifuge light blue-top tube for 15 minutes at
approximately 1500 g within 60 minutes of collection. Using a plastic
pipette, remove plasma, taking care to avoid the WBC/platelet buffy
layer and place into a plastic vial. Centrifuge a second time and
transfer platelet-poor plasma into a new plastic vial. Plasma must be
free of platelets (<10,000/mcL). Freeze immediately and ship on dry
ice.

Reject Criteria
Thawed specimen, Received room temperature, Received refrigerated,
Hemolysis, Received thawed
Setup Schedule
Wednesday, Friday

Reported (Analytical Time)
Next day

CPT Code
85280

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

Notes
Frozen -70 degrees: 1 year






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