Test Code APTT PTT (Activated Partial Thromboplastin Time)

Specimen Type

Blood

2.7 mL

Light Blue-Sodium Citrate
Plasma/Refrigerate

Test should be performed within 4 hours of blood collection.

30 Minutes

4 Hours

Optical Clot Detection

25.1-36.5 Seconds

APTT is a screening test only.

Use the orderable “Anti-Xa UF Heparin Monitoring” to monitor Heparin therapy.

For patients transitioning from a DOAC only, aPTT heparin monitoring can be used.

Heparin Therapeutic Range (60 – 90 seconds).

85730