Platelet Function Analysis
Label Mnemonic: PFA
Epic code: LAB1125
Downtime form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
6240 RCP
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) Light Blue top tube 1.8 mL (Na Citrate) Light Blue top tube 1.8 mL (Na Citrate)
Full draw of 2.7 mL light blue (or TWO 1.8 mL) Sodium Citrate tubes.
Delivery Instructions:
Hand deliver to laboratory within 2 hours of collection.
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.
This test needs a separate tube! It CANNOT be done with any other coagulation tests.
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