University of Iowa
Diagnostic Laboratories
(UIDL) Test Directory

319-384-7212 (local)
1-866-844-2522 (toll free)


Platelet Aggregation Studies
Order Form: Laboratory Requisition
Specimen:
Platelets
Minimum:
15 ml blood with platelet count >100,000/mm3
Testing
Schedule:
To be scheduled and drawn by the Hemostasis/Thrombosis
technologist only.  Please call 356-3573 to schedule.
Analytic Time:
24 hours (upon receipt in laboratory)
Reference Range:
This is a test to evaluate platelet hypofunction.
Reported as normal or abnormal for stimulation by: Epinephrine, ADP,
collagen, arachidonate and ristocetin and is accompanied with an
interpretation
Comments:
Must have Hematology Consult approval from pager 4326.

Aspirin taken within the last seven days may invalidate results.  
Usually performed as part of a Platelet Profile.
Methodology:
Optical density changes.
Instructions:
Contact UIDL Client Services:
1-866-844-2522
CPT Code:
Epinephrine     CPT Code: 85576
ADP             CPT Code: 85576
Collagen        CPT Code: 85576
Arachidonate    CPT Code: 85576
Ristocetin      CPT Code: 85576
Spontaneous Platelat Aggregation:  CPT code: 85576
Pathologist interpretation:        CPT Code: 85576 -26

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Updated: 10/11/2007