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Test Code LAB4164 PLATELET FUNCTION TEST

Important Note

Begining 6/2/2026, this test has been discontinued as the analyzer is no longer in service.

Below is a link to the recommended alternative test: TEG PLATELET MAPPING - Kootenai Health

Platelet Mapping testing has limited stability (~2 hours) so outpatient collection needs to take place in the hospital laboratory.

New Method Comparison

Below is a brief summary of the reporting with the new TEG method:

Parameter

Clinical Usage

Interpretation

PFA-100 equivalent

ADP

Therapy response for patients taking P2Y12 / ADP inhibitors

(e.g., clopidogrel, prasugrel, ticagrelor)

Stronger inhibition = lower MA

(i.e., flags low)

Weaker inhibition = higher MA

(i.e., flags normal or high)

Collagen/ADP

AA

Therapy response for patients taking Arachidonic Acid inhibitors (e.g., aspirin)

Stronger inhibition = lower MA

(i.e., flags low)

Weaker inhibition = higher MA

(i.e., flags normal or high)

Collagen/Epi

HKH

Evaluates underlying hemostasis to determine maximum and minimum platelet function

Baseline underlying clot strength; thrombin activated; maximum platelet function

Less inhibition will see the ADP/AA result closer to the baseline (i.e., HKH)

Platelet count and hematocrit

ActF

Isolates platelet contribution; fibrin only result; minimum platelet function

Increasing inhibition will see the ADP/AA result move closer to the fibrin only result (i.e., ActF)