Sign in →

Test Code LAB318 Platelet Function Test (PFT)

Department

HEMATOLOGY

Collection Requirements

Do Not Transport via Tube System

Must be a full draw.

Must draw a discard tube first.

Primary Collection Container

2 - Blue 2.7 mL (Citrate)

Transport

Ambient

Preferred Transport Temperature

Ambient

Processing

Submit specimens as whole blood. DO NOT CENTRIFUGE.

Test must be performed within 4 hrs of collection.

Stability

Ambient: 4 hours

Minimum Testing Volume

3 mL

Reference Range

Collagen/Epinephrine: 55-175 sec

Collagen/ADP: 35-125 sec

Methodology

Platelet thrombus formation on collagen/epinephrine and collagen/ADP coated membranes is measured in aperture closure time (CT).

Performed

Sunday – Saturday

Reported

As completed

CPT Codes

85576×2

Unacceptable Conditions

Frozen, clotted, grossly hemolyzed, centrifuged or serum specimens.

Traumatic draws are not acceptable.

Additional Information

The Platelet Function Test may be affected by low platelet counts(<100,000/cumm)and additionally by inadequate hematocrits(<25%).

IVY bleeding time is no longer performed.