ADAMTS13 (von Willebrand Factor-cleaving protease) Activity and Inhibitor

Light Blue Top Tube

Tube Type (x2)

Test ID LAB5317
EPIC Order
CPT Code(s) 85397, 85335 (if indicated)
Group/Individual Test Group
Laboratory Special Coagulation
Tube Station 30
Specimen Routine: 3.0 mL blood/light blue top tubes x 2; see Comments
Unspun - 4 hrs
Room Temp - 4 hrs
Refrigerated - NO
Frozen - 6 months
Availability Routine: Weekly
Turnaround Time 7 Business Days
Internal Reference Testing & Outreach Handling Instructions Platelet poor plasma (double spun). Aliquot and freeze within 4 hours.
Reference Range Activity: >79 %
Inhibitor: <0.4 Bethesda Units (Bu)
Deliver to the laboratory immediately.

ADAMTS13 Inhibitor will reflex with ADAMTS13 Activity ≤20% .

Reviewed by Christopher Parker on November 16, 2021

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514