Partial Thromboplastin Time

Centralized Core Laboratory:Hematology

Test ID/Workstation: PTT ACOAG

Specimen Type: Blood

Tube Type: Blue top (sodium citrate) tube

Collection Volume: 2.7 mL (minimum 1.8 mL)

Must use appropriated sodium citrate tube based on volume of blood drawn (1.8 mL or 2.7 mL tube)

Cause for rejection: Samples hemolyzed, clotted, diluted with IV fluid; contaminated with heparin; improperly filled; not kept on ice; received > 1 hr after drawn

Storage: Refrigerated

Availability: Daily, 24 hours; STAT

Methodology: Photometric/turbidometric

Special Instructions: Indicate clearly if a specimen has been drawn from an arterial line or from a line that has been rinsed with heparin. Please indicate if the patient is currently receiving anticoagulant therapy.

Lab/Phone: 330-543-8416

TAT: 4 hours

Additional Info: Reference range: < 40 seconds

CPT Code: 85730

Synonyms: Activated Partial Thromboplastin Time; APTT; PTT

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