Platelet Function Analysis

Label Mnemonic:	PFA
Epic code:	LAB1125
Downtime form:	Doctor/Provider Orders - Pathology Core and Specialty Care Nursery

Hemostasis/Thrombosis
6240 RCP
356-3573

Specimen(s):

Blood More information

Specimen Instructions:

Send at room temperature and DO NOT put the sample in the pneumatic tube system.

Collection Medium:

	or		and
Light Blue top tube 2.7 mL (Na Citrate)	or	Light Blue top tube 1.8 mL (Na Citrate)	and	Light Blue top tube 1.8 mL (Na Citrate)

Minimum:

Full draw of 2.7 mL light blue (or TWO 1.8 mL) Sodium Citrate tubes.

Delivery Instructions:

Sample testing must be completed within 4 hours of draw time.

Testing Schedule:

24 hrs/day, 7 days a week, including holidays.

Turn Around Time:

2 hours (upon receipt in laboratory)

Reference Range:

Collagen/Epinephrine = 66-169 secs.
Collagen/ADP =         67-120 secs.

Comments:

This test needs a separate tube! It CANNOT be done with any other coagulation tests.

Methodology:

Citrated blood is forced through a capillary system to a membrane with a central aperature coated with collagen and either epinephrine or ADP. The time required to obtain full occlusion of the aperture by a platelet plug is the closure time and is reported in seconds.

CPT Code:

85576 x2

See Additional Information:
Specimens Requiring Immediate Delivery
Phlebotomy Tubes and Order of Draw