Factor 7 Activity


Sunquest Code:F7  
Epic Code:LAB305Epic Name:Factor 7 Assay
Synonyms:Proconvertin; Stabile Factor; Factor VII Activity
Methodology:Thromboplastin clotting time correction of Factor 7 deficient plasma. Patient dilutions are compared to a known set of standard dilutions and a percentage is determined.
CPT Code:----------CPTCODES HERE----------
Turnaround Time:Turnaround time is 4-8 hours if received during lab hours (see Associated Link). With pre-notification, stats are done within 1 hr after receipt in the laboratory.


Collection Instructions

Specimen:Blood
Optimal Volume:2.7 mL (in 3 mL tube) - filled to fill line on the tube.
Minimum\Peds Volume:2.7 mL (in 3 mL tube) - filled to fill line on the tube.
Collection Instructions:See link to Specimen Collection and Processing for Coagulation Specimens.
Causes for Rejection:Underfilled tube or clotted specimens


Processing and Shipping

Specimen Processing:See link to Specimen Collection and Processing for Coagulation Specimens.
Shipping Instructions:See link to Specimen Collection and Processing for Coagulation Specimens.
Test Performed at or Referral Lab Special Coagulation  (UMMC-East Bank)


Interpretive

Critical Range:Less than 10%
Reference Range:

Less than 1 d

25-150%

1-4 d

47-85%

5-29 d

62-116%

30-89 d

66-114%

90-179 d

65-117%

180-364 d

67-107%

1 y and older

50-129%

 

 

Use:Factor 7 is an extrinsic coagulation pathway factor. A deficiency can result in a moderately severe bleeding disorder. Factor 7 requires Vitamin K for its carboxylation. It wil be decreased in Vitamin K deficiency/coumadin therapy.


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