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ristocetin cofactor assay
Synonyms: von Willebrand's Factor, Functional Assay 
Computer Code: RCFA
Specimen Collection: 2.7 mL blood (blue top tube). Transport to lab within 3 hours. 
Minimum Volume: 1.8 mL 
Handling Instructions for Offsite Areas: Maintain at room temperature. If specimen cannot be transported within 2 hours, centrifuge at 3,000 rpm for 20 minutes. Using a plastic pipette, transfer plasma to plastic tube and freeze plasma. 
Reference Values: 57-150%  
Lab Code: SDH 
Requisition: SPEC H
Test Frequency: Weekly 
Routine TAT: 7 days 
Stat TAT: contact lab 
CPT Code(s): 85245 
LCD or NCD:  
Methodology Used: 2
See Addendum XVII

Albany Medical Center
43 New Scotland Avenue
Albany, NY, 12208
Date: 12/23/2014
Time: 00:13:59 (24hr)