Test directory: Ristocetin Cofactor

Ordering Code573
Test NameRistocetin Cofactor
AliasRcoF
Von Willebrand Factor Ag Activity
Preferred SpecimenPlasma
Preferred ContainerCitrate, 3.2% (Lt Blue)
Optimum Volume1 mL
Collection InstructionsFasting specimen preferred, but not required
Draw full tube.
Handling InstructionsDouble centrifuge plasma within 60 minutes of collection
Separate and freeze immediately
Strict frozen. Do not thaw.
Transport RequirementsOahu: Frozen
Airline: Frozen
Specimen StabilityAmbient: 6 Hours
Frozen: 3 Weeks
Rejection CriteriaAmbient, Refrigerated, Hemolyzed, Lipemic, Thawed
Avail. StatNO
Analytic TimeUp to 8 Days
MethodologyPlatelet Agglutination
Reference Lab Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of April 18, 2024.
ComponentAgeMale NormMale Critical LowMale Critical HighFemale NormFemale Critical HighFemale Critical LowUnitsAdd'l info
Ristocetin CofactorALLSee report.