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HelpTest ID BLOD1232 Ristocetin Cofactor Activity
AKA
vonWillebrand factor activity
Specimen Type/Requirements
1 Blue-Top (Sodium Citrate) Tube
Tube must be filled to the minimum draw line. Transport to laboratory immediately.
Stability/Transport
| Room Temperature | 4 hours | |
| Refrigerated | N/A | |
| Frozen | 1 month (platelet-poor plasma) | Preferred for Transport |
Performed Test Frequency
Tuesday and Friday
Methodology
Platelet agglutination
CPT
85245
Additional Information
Part of VonWillebrand Workup BLOD0371
Report Available
1-4 days
Specimen Volume
| Preferred Volume | 1 full Blue-Top (Sodium Citrate) Tube |
| Minimum Volum | 1 mL platelet-poor plasma |
Performing Lab
Sanford Laboratories Fargo- Core Lab
Interface Build Information
| Result Code | Result Code Description |
|---|---|
| 17073 | Ristocetin Cofactor Activity |