Protein S Activity - LG5340
| Sunquest Code: | LSMISC | ||
| Epic Code: | LAB4909 | Epic Name: | Send Outs Misc Test |
| Methodology: | Clotting assay | ||
| Turnaround Time: | Specimens are sent to reference laboratory Mon-Fri; results are reported within 7 days. | ||
| Associated Links: | Specimen Collection and Processing for Coagulation Specimens |
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Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 2.7 mL (in 3 mL tube) - filled to fill line on the tube |
| Minimum\Peds Volume: | 1.8 mL (in 2 mL tube) - filled to fill line on the tube |
| Container: | Blue Na Citrate, 3.2% - fill to fill line on tube |
| Collection Instructions: | Patients should be off warfarin for at least 4 weeks before drawing a sample. The assay kit manufacturer has demonstrated the assay to be unaffected by levels of unfractionated heparin or low molecular weight heparin up to 2 IU/mL, but the results may be artifactually elevated in samples containing dabigatran or rivaroxaban. |
| Causes for Rejection: | Overfilled or underfilled tubes. Specimen other than citrated plasma. |
Processing and Shipping
| Specimen Processing: | See link to Specimen Collection and Processing for Coagulation Specimens for platelet-poor plasma. Aliquot 0.5 mL, 0.3 mL minimum. |
| Shipping Instructions: | Ship on dry ice. |
| Test Performed at or Referral Lab | Lab Sendouts (Versiti) |
| Referral Lab number: | 1041 |
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