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von Willebrand Antigen

Centralized Core Laboratory : Hematology

Test ID/Workstation :
VWFAG ACOAG
Specimen Type:
Blood
Tube Type:
Blue top (sodium citrate) tube
Collection Volume:
2.7 mL (minimum 1.8 mL) Must use appropriate sodium citrate tube based on volume of blood drawn (1.8 mL or 2.7 mL tube)
Cause for Rejection:
Sample hemolyzed, clotted, diluted with IV fluid; contaminated with heparin; improperly filled; received > 1 hour after drawn
Storage:
Frozen
Availability:
Mon-Fri (0800-1500)
Methodology:
BCS-XP; LIA Test
Special Instructions:
To determine Von Willebrands disease, other recommended testing includes: Factor VIII, Ristocetin Cofactor, APTT If collected at an offsite location, send by a STAT Courier to Hospital lab.
Lab/Phone:
330-543-8416
TAT:
1 week
Additional Info:
Reference range: Normal: 50-160%
CPT Code:
85246
Synonyms:
Antigenic Factor VIII; Factor VIII Related Antigen