Veripath Test Directory

Epic Test Name Platelet Aggregation Aspirin Effect, Whole Blood
Description Aspirin affects platelet function by irreversibly inhibiting COX-1 receptors. Testing for Aspirin effect includes measuring platelets aggregation in whole blood after stimulating with 0.5mM aracidonic acid and 1µg/mL Collagen. Based on the degree of inhibition of platelet aggregation, effect of Aspirin is quantified and reported as adequate, suboptimal or no effect.
Specimen Requirements 
Container Light blue (3.2 % sodium citrate) collection tube and EDTA tube
Specimen Type Blood
Preferred Collection Volume 3mL Sodium Citrate and 2ml EDTA tube
Minimum Collection Volume 2mL Sodium Citrate and 2ml EDTA tube
Collection Instructions
Specimen Handling In-house patients, transport specimens by hand at room temperature. Specimen must not be transported by automatic tube station.
Outside clients, follow collection instructions and the steps below:
1. Specimen must remain at room temperature.
2. Specimen must arrive withing 1 hour after collection.
Rejection Criteria Hemolysis, contamination with heparin, clotted, short sample, >4 hours old
Methodology Aggregometry
Reference Range See Intrepretive report.
CPT Code(s)
85576 x2
Department Hemostasis/Coagulation
Contact Information Hemostasis Lab; 214-633-4959 Customer Service: 214-633-0400, Toll Free 1-877-887-8136
Turn Around Time1-3 Days
Performed Monday - Friday 7am - 3pm
Performed by Hemostasis Lab
Notes 1. Platelet count must be greater than 100,000. 2. Specimen must be accompanied by a "Platelet Aggregation Study History Form". The aggregation report will be delayed until form has been submitted.
Updated/Reviewed 07/25/2016