Methodology
Enzyme Digestion and mechanical measurement of aPTT
Synonyms
Hepzyme PTT
Specimen Type
Plasma
Performing Lab
RCHSD Coag
Epic ID
LAB0325
Lab Test Days
As Received
Standard TAT
4 Hours
Stat TAT
1 Hour
Collection Information
Specimen Required
(one) 1.8 mL or (one) 2.7 mL Blood
Container Type
Light Blue (Sodium Citrate)
Collection Instructions
Fill tube completed.
Processing Information - Lab Use Only
Specimen Stability
Room Temp=4 Hours; Refrigerated=Unacceptable; Frozen=2 Weeks (Plasma only)
Rejection Criteria
Clotted; Hemolysis; Under filled tube; >4 Hours Old; Refrigreated; Chilled
Test Volume Required
1.3 mL Plasma
Minimum Test Volume
0.9 mL Plasma
Processing Instructions
Check tube for clots and centrifuge specimen in Coag area.
CPT Codes
85525, 85730