Test Detail

Collagen-binding Activity (CBA) Profile

Test Code:

500360

Performing Lab: LABCORP ESOTERIX COAGULATION LAB

CPT Code:

85246 83520

Order Information
Results

Specimen Container	Blue-top (sodium citrate) tube
Specimen Type	Plasma, FROZEN
Volume	2.0 mL
Temperature	FREEZE Stability: Refrigerate up to 4 hours Acceptable freeze/thaw up to 4 cycles
Specimen Handling	CITRATED PLASMA SAMPLES SHOULD BE COLLECTED BY DOUBLE CENTRIFUGATION. Blood should be collected in a blue-top tube containing 3.2% buffered sodium citrate.[1] Evacuated collection tubes must be filled to completion to ensure a proper blood to anticoagulant ratio.[2,3] The sample should be mixed immediately by gentle inversion at least six times to ensure adequate mixing of the anti- coagulant with the blood. A discard tube is not required prior to collection of coagulation samples except when using a winged blood collection device (i.e. 'butterfly'), in which case a discard tube should be used.[4,5] When noncitrate tubes are collected for other tests, collect sterile and nonadditive (red-top) tubes prior to citrate (blue-top) tubes. Any tube containing an alternate anticoagulant should be collected after the blue- top tube. Gel-barrier tubes and serum tubes with clot initiators should also be collected after the citrate tubes. Centrifuge for 10 minutes and carefully remove 2/3 of the plasma using a plastic transfer pipette, being careful not to disturb the cells. Deliver to a plastic transport tube, cap, and recentifuge for 10 minutes. Use a second plastic pipette to remove plasma, staying clear of the platelets at the bottom of the tube. Transfer the plasma into a LabCorp PP transpak frozen purple tube with screw cap (LabCorp 49482). FREEZE immediately and maintain frozen until tested. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested. Please print and use the Volume Guide for Coagulation Testing to ensure proper draw volume.
Methodology	Enzyme-linked immunosorbent assay (ELISA)
Unacceptable Conditions	Lipemia; icteric specimen; hemolysis; clotted specimen; specimen contaminated with heparin (ie, drawn with blood gases)
Days Set-Up	M
Shift Performed	1
TAT From Set-Up	3 - 9 Days

Result Code	Result Name	LOINC
500357	von Willebrand Factor Antigen	27816-8
500359	vWF Collagen Binding	50378-9
500552	vWF Collagen Binding Act. **	50377-1