Prekallikrein Factor Activity
| Abbrev Code: | ARMISC | ||
| Order Code: | LAB4909 | Order Name: | Send Outs Misc Test |
| Methodology: | Electromagnetic mechanical clot detection | ||
| CPT Codes: | 85292 x1 | ||
| Turnaround Time: | Specimens are sent to the reference laboratory Mon-Sat; results are reported within 1-8 days. | ||
| Special Instructions: | Send platelet-poor plasma for testing. See Associated Links for Specimen Collection and Processing for Coagulation Specimens. | ||
| 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 |
| Causes for Rejection: | Over-filled or under-filled tubes. Serum, EDTA plasma, clotted or hemolyzed specimens. |
Processing and Shipping
| Specimen Processing: | See Specimen Collection and Processing for Coagulation Specimens. Aliquot 2 mL, 1 mL minimum, platelet-poor plasma. CRITICAL FROZEN. Separate samples must be submitted when multiple tests are ordered. |
| Shipping Instructions: | Ship on dry ice. |
| Stability: | 4 hours at room temperature; 2 weeks frozen. |
| Test Performed at or Referral Lab | Lab Sendouts (ARUP) |
| Referral Lab number: | 99043 |
Interpretive
| Reference Range: | 55-207% |
| Use: | Evaluate the cause of an isolated prolonged PTT in a patient who is not currently bleeding. |
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