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Outpatient Laboratory Services

 

Laboratory Outreach Program

 

Mayo Clinic Laboratories

Test Code 5620035 PTT (APTT)

Test ID

1233000038

Specimen Requirements

Collection Requirements Specimens should be collected in 2-3 mL 3.2% sodium citrate (light blue top) tubes from peripheral veins, when possible. When drawn from an indwelling line, 5 ml saline flush followed by 5 ml discard tube should be performed. Do not under or over-fill collection tubes. Gently invert the tube end-over-end 8-10 times. If hematocrit is >55%, contact coagulation lab prior to sample collection.
Shipping / Handling Instructions Outpatient specimens: Specimens should be centrifuged and frozen within 4 hours of collection to generate platelet-poor plasma. A minimum of 0.5 ml frozen citrated plasma is needed per test ordered.
Inpatient specimens: Transport at room temperature. Specimens should be received in lab within 2 hours of collection.

Container Type

Laboratory Container Default Temperature Minimum Volume
CUH LAB BLUE-NA CITRATE Yes Frozen 0.6
ZALE LAB BLUE-NA CITRATE Yes Room Temperature 0.6

Performing Section

CUH LAB: CUH COAG
ZALE LAB: ZALE COAG

Components

Component Name Component ID LOINC Code
ACTIVATED PTT 1230000535 3173-2 (Coagulation surface induced:Time:Pt:Bld:Qn:Coag)