Von Willebrand Factor Activity (Ristocetin Cofactor)
Order Name
RISTOC COF
Test Number: 1502200
Revision Date 10/08/2024
Test Number: 1502200
Revision Date 10/08/2024
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
Von Willebrand Factor Activity (Ristocetin Cofactor)
|
Clot Detection | 6014-5 |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 2 mL (1) | Plasma | Sodium Citrate 3.2% (Blue Top) | Frozen |
| Instructions | Frozen Citrated plasma, plasma must be double spun and frozen in 1.5 ml aliquots. Do not pool plasma from multiple tubes! Do not thaw. Hemolyzed specimens are not acceptable. See Specimen Collection Section, Coagulation Testing. Fasting for at least 8 hours is preferred. Specimen Stability: Room temperature: unacceptable, Refrigerated: unacceptable, Frozen: 3 months |
|||
| GENERAL INFORMATION | |
|---|---|
| Testing Schedule | Wed |
| Expected TAT | 1-7 Days |
| Clinical Use | Also known as von Willebrand Factor Activity |
| CPT Code(s) | 85245 |
| Internal Comments | 11/30/16 - Updated ref lab information - JLS 1/30/17 - this test was brought in house in CPCL Special Coag. removed the ARUP information from test notes. Reference Lab: ARUP ARUP Test Code: 30250 Click Here to view information on the ARUP website. 2/28/18 updated schedule from Mon, Wed, Fri / TAT 2-5 Days to Friday and TAT 5-8 days. - JK 11/3/23 per Joseph Lucas hlp tkt, change methodology from Plt Agg to clot det -hdm |
| Lab Section | Coagulation |