Test directory: Von Willebrand Panel

Ordering Code 4396
Test Name Von Willebrand Panel
Alias vWD Panel
Profile Contains
Preferred Specimen Plasma, Citrate, 3.2%
Preferred Container 2 B (Citrate - Blue Top)
Optimum Volume 5 mL
Collection Instructions Fasting specimen preferred, but not required. Draw 4 full Citrate tubes. Mix tubes well.
Handling Instructions Double centrifuge plasma. Separate and freeze immediately at -20 deg C. Do NOT thaw once specimen is frozen.
Transport Requirements Oahu: Frozen
Airline: Frozen
Specimen Stability Ambient: 4 Hours, Whole Blood (unopened tube) or Plasma
Frozen: 2 Weeks Plasma
Avail. Stat NO
Analytic Time 7 Days
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s) for Ristocetin Cofactor

The reference ranges listed below are valid on this date of October 8, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Factor VIII Assay ALL 50-150 50-150 %

This assay is...
This assay is a one-stage Factor VIII activity assay

This assay may not be suitable for monitoring all types of
Factor VIII clotting factor replacement therapy. Refer to drug manufacturer instructions for appropriate assay type for factor activity monitoring
Note1

Note1:


This assay is a one-stage Factor VIII activity assay

This assay may not be suitable for monitoring all types of
Factor VIII clotting factor replacement therapy. Refer to drug manufacturer instructions for appropriate assay type for factor activity monitoring
.

Reference range(s) for Ristocetin Cofactor

The reference ranges listed below are valid on this date of October 8, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Ristocetin Cofactor ALL See report.

Reference range(s) for Ristocetin Cofactor

The reference ranges listed below are valid on this date of October 8, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
von Willebrand Factor Antigen ALL 42.0-176.3 42.0-176.3 %