Factor 11 Activity
Abbrev Code: | F11 | ||
Order Code: | LAB309 | Order Name: | Factor 11 Assay |
Synonyms: | Anti-Hemophilic Factor C; Plasma Thromboplastin Antecedent; Factor XI Activity | ||
Methodology: | APTT clotting time correction of factor 11 deficient plasma. Patient dilutions are compared to a known set of standard dilutions and a percentage is determined. | ||
CPT Codes: | 85270 x1, 85270 x1 | ||
Turnaround Time: | Within 8 hours if received into the testing laboratory by 12 p.m. Testing performed 6 days per week. With pre-notification, STATs are done within 1 hour after receipt in the testing laboratory. | ||
Associated Links: | Specimen Collection and Processing for Coagulation Specimens |
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: | See link to Specimen Collection and Processing for Coagulation Specimens. |
Causes for Rejection: | Underfilled tubes, overfilled tubes, clotted specimens, not received or processed and frozen within 4 hours of collection or, specimen thawed during transit. |
Processing and Shipping
Specimen Processing: |
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Shipping Instructions: |
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Test Performed at or Referral Lab | UM Special Coag (K) (UMMC East Bank) |
Interpretive
Critical Range: | Less than 10% | ||||||||||||||
Reference Range: |
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Use: | Factor 11 is an intrinsic coagulation pathway factor. A deficiency may cause bleeding of variable severity (usually mucous membrane or post surgical). |
Click HERE to Report test errors or omissions.
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