Platelet Aggregation

Message

Performed at BUMCP.

IMPORTANT NOTE: Performed Monday - Friday ONLY before 5:00 pm
AZ Locations - Call for STAT courier prior to collecting the sample, and time collection with the expected arrival time of the courier.
DO NOT TRANSPORT VIA THE TUBE SYSTEM.
Must be received at BUMCP within 1 hour of collection.

Test Code

PLTAGGR

Alias/See Also

Ristocetin Aggregation

CPT Codes
85576

Includes

Tests included in the panel:
Collagen
Epinephrine
Ristocetin (Weak and Strong)
Arachidonic Acid

Preferred Specimen

3.2% sodium citrate - blue top tubes (2.7 mL each); Whole blood - DO NOT CENTRIFUGE

Instructions

Patient should be fasting for 8 hours prior to have their blood drawn.
Patient should not have taken Aspirin or Aspirin containing drugs for 7-10 days prior to testing.
Platelet counts below 100,000/mm3 may give variable results and should not be used.

Transport Temperature

Room Temperature

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Plasma and cells are separated Delivered by pneumatic tube Incorrect anti-coagulant Specimen past stability Underfilled/Overfilled tube Drawn in outdated/expired tube Hemolyzed, Icteric, Lipemic or Clotted Patient’s platelet count <100,000/ul

Setup Schedule

Performed at BUMCP Monday - Friday

Clinical Significance

Platelet aggregation is clinically significant in the detection and diagnosis of acquired or congenital qualitative platelet defects. The platelet’s ability or inability to respond to particular aggregating reagents is the basis for differentiating platelet dysfunction.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.