von Willebrand Factor Multimers
| Abbrev Code: | VWMULT | ||
| Order Code: | LAB4584 | Order Name: | von Willebrand Multimers |
| Synonyms: | Polymers, von Willebrand Factor; von Willebrand Protein Polymers sDS Gel, Plasma; VWF Multimers; von Willebrand Multimers | ||
| Methodology: | Electrophoresis | ||
| CPT Codes: | 85247 x1 | ||
| Turnaround Time: | Specimens are sent to reference laboratory Mon-Sat; results are reported within 4-11 days. | ||
| Associated Links: | von Willebrand Factor (VWF) Panel Algorithm, von Willebrand Factor (VWF) Screen Algorithm, Specimen Collection and Processing for Coagulation Specimens |
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Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 2.7 mL (in 3 mL tube) - filled to fill line on the tube. |
| Minimum\Peds Volume: | 2.7 mL (in 3 mL tube) - filled to fill line on the tube. |
| Container: | Blue Na Citrate, 3.2% - fill to fill line on tube |
| Collection Instructions: | See link to Specimen Collection and Processing for Coagulation Specimens. |
| After Care: | If the patient has a coagulation abnormality, apply direct pressure to the puncture site for 10 minutes; apply a pressure dressing. Instruct the patient to leave the bandage on for 12 hours. |
| Causes for Rejection: | Serum. Specimens collected in wrong anticoagulant. Clotted, hemolyzed or non-frozen specimens. |
Processing and Shipping
| Specimen Processing: | See link to Specimen Collection and Processing for Coagulation Specimens. Aliquot 1 mL, 0.5 mL minimum. Store in freezer. |
| Shipping Instructions: | See link to Specimen Collection and Processing for Coagulation Specimens. |
| Test Performed at or Referral Lab | Lab Sendouts (ARUP) |
| Referral Lab number: | 92281 |
Interpretive
| Reference Range: | Interpretive report provided. |
| Use: | This is a qualitative assay to measure the variable concentration of the different sizes of von Willebrand factor multimers in a patient sample. This test may be used as an aid in the diagnosis of von Willebrand's disease. |
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