| Test Name: | Aspirin Sensitivity |
| Epic Order Code: | LAB5053 |
| CPT Code: | 85576 | | |
| Specimen(s) Type: | Plasma; Full tube required. |
| Acceptable Container(s): |  Tube is Greiner 2 ml |
| Testing Schedule: | 24 hrs/day, 7 days/week |
| Turn Around Time: | STAT: 1 hour |
| | Routine: 4 hours |
| Collection Information: | Must be collected between 2 and 30 hours after ingestion of aspirin. Obtain specimen by standard collection procedures, using a 21 gauge or larger needle. If only Aspirin Sensitivity is being collected, draw 5 mL into a red top tube, discard and then collect tube for Aspirin Sensitivity. Tube must be full. |
| Transport Information: | Deliver to lab immediately to ensure platelet viability. All specimens must be signed into the laboratory. |
| Reference Clients: | If unable to deliver to the lab immediately, store and transport specimen at room temperature. Specimen must be tested within 4 hours. |
| Causes for Rejection: | Improperly labeled, incorrect container, contaminated, insufficient quantity, incorrect/delay in transport, grossly hemolyzed, clotted, under or over-filled tube. |
| Reference Range: | A result of <550 ARU correlates to patient sensitive to aspirin. A result of >550 ARU correlates to patient not on aspirin or aspirin resistance. |
| Additional Information: | Correlate results with other clinical and lab data. Platelet counts <1000,000cm and a HCT of <33% may effect the ability to obtain a result with the assay. |
| | NEVER collect behind an EDTA purple top tube as this effects platelet function. |