Ordering Recommendation
Mnemonic
RCF
Methodology
Platelet Agglutination
Performed
Mon-Sat
Reported
1-3 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.
Specimen Preparation
Transfer 1.5 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Unacceptable Conditions
Serum. EDTA plasma, clotted or hemolyzed specimens.
Remarks
Stability
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: at -20°C: 3 months; Frozen at -70°C: 6 months
Reference Interval
Age | Reference Interval |
---|---|
0-6 years | 51-215% |
7-9 years | 52-176% |
10-11 years | 60-195% |
12-13 years | 50-184% |
14-15 years | 50-203% |
16-17 years | 49-204% |
18 years and older | 51-215% |
Interpretive Data
Compliance Category
FDA
Note
Hotline History
N/A
CPT Codes
85245
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
0030250 | von Willebrand Factor, Activity (RCF) | 6014-5 |
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
- RCF
- Ristocetin Cofactor, Plasma
- von Willebrand Factor (vWF) Activity
- VWF:Rco
von Willebrand Factor Activity (Ristocetin Cofactor)