Von Willebrand Factor Activity (GPIbM) Assay
Label Mnemonic: | VWFAC |
Epic code: | LAB9329 |
Supply order: | Supply Order Form |
Billing: | Billing Policies |
CPT code: | 85397 |
Specimen(s):
Plasma More information
Collection Medium:
Light Blue top tube 2.7 mL (Na Citrate) |
Minimum:
Full draw; 2.7 mL light blue top (mix well).
Rejection Criteria:
Short drawn tube, clot, traumatic tap (excessive hemolysis).
Testing
Schedule:
0800-1630 Monday, Wednesday and Friday. If you need results STAT, call Hematology resident (0800-1630, M-F) at 356-8628. All other times page the Pathology resident on-call at 3404.
Reference Range:
51 – 204%
Comments:
This test needs a separate tube! It CANNOT be done with any other
coagulation tests.
Methodology:
Turbidimetric, particle agglutination.
Sample
Processing:
Centrifuge within four hours of draw time.
Centrifuge at a speed and time necessary to get barrier separation of plasma/serum and cells.
Separate plasma into plastic container and cap (glass is not acceptable).
Centrifuge a second time to ensure platelet poor plasma and separate plasma into a new, labeled plastic tube, cap.
Centrifuge at a speed and time necessary to get barrier separation of plasma/serum and cells.
Separate plasma into plastic container and cap (glass is not acceptable).
Centrifuge a second time to ensure platelet poor plasma and separate plasma into a new, labeled plastic tube, cap.
Sample
Storage:
Freeze specimen immediately.
Transport
Instructions:
Place labeled specimen into zip-lock type biohazard bag; seal bag.
Place requisition into outside pocket of bag.
Place dry ice on top of specimen in Styrofoam container to maintain frozen temperature.
Place requisition into outside pocket of bag.
Place dry ice on top of specimen in Styrofoam container to maintain frozen temperature.
CPT Code:
85397