Methodology
Platelet Aggregometry
Synonyms
ADP; Arachidonic Acid
Specimen Type
Whole Blood
Performing Lab
UCSD Special Coag
Epic ID
LAB00264
Lab Test Days
Prescheduled (Monday-Friday
Standard TAT
24 Hours
Collection Information
Specimen Required
(three) 2.7 mL Whole Blood for Infants 5-10 kg or (five) 2.7 mL Whole Blood for Children >10kg
Container Type
Light Blue (Sodium Citrate)
Collection Instructions
Call UCSD Special Coag for inquiries, scheduling, and instructions (858) 657-5683 Monday-Friday 0800-1630 Only. FOR INPATIENTS, Main Lab must be notified prior to draw to schedule testing with UCSD Special Coag Monday-Friday 0800-1630 Only. Many drugs inhibit platelet function and can complicate proper interpretation of platelet aggregation studies. Patients should avoid all drugs for several days before testing if possible. Aspirin-containing medication should be avoided for at least 10 Days. Please have a list of medication available when calling UCSD Special Coag for scheduling. Caffein, smoking and lipemia interfere with platelet aggregation testing. Therefore, for best results, the patients should be fasting and not smoking for at least 8 hours before testing. A fat-free breakfast with no caffeine is acceptable. Collect (three-five) 2.7 mL Whole Blood in 3.2% sodium citrate (light blue-top) tubes and discard the first (light blue-top) tube. Quickly but gently mix tubes to prevent clotting. Samples must be kept at room temp at ALL times.
Processing Information - Lab Use Only
Transport Temperature
Ambient-Only
Specimen Stability
Room Temp: 3-4 Hours; Refrigerated: Unacceptable; Frozen: Unacceptable
Rejection Criteria
Hemolysis; Lipemia; NSAIDS; Salicylates; Clotted; Improper line draw
Test Volume Required
Infants 5-10 kg: (three) 2.7mL Whole Blood; Children >10 kg: (Five) 2.7 mL Whole Blood
Minimum Test Volume
Infants 5-10 kg: (three) 2.7mL Whole Blood; Children >10 kg: (five) 2.7 mL Whole Blood
Processing Instructions
Complete the UCSD Special Coag requisition and submit with specimens room temp. Specimens must be transported by "RUSH" courier to UCSD Special Coag (CALM Lab) within 1-2 Hours of collection. Samples must be kept at room temp at ALL times.
Comments
NOTE: THIS TEST IS NOT "HEPARIN INDUCED PLATELET AGGREGATION." Testing must be scheduled with UCSD Special Coag prior to specimen collection Monday-Friday 0800-1630 Only.
CPT Codes
85576 x 6
Revised
02-25-20