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Factor VII, Plasma

Performing Laboratory

Charleston Area Medical Center, Inc.

Methodology

Photometric
This test measures coagulation factor VII in suspected deficient patients.

Specimen Requirements

Draw 2 full, light blue-top (3.2% sodium citrate) tubes by “clean” venipuncture (no excessive trauma). Immediately after draw, invert tubes several times to mix blood with additive. Immediately spin down for 15 minutes, and place 3 mL of citrate platelet-poor plasma in a plastic vial. (Clotted blood is not acceptable.) Send specimen frozen. Avoid hemolysis.

Reference Values

50-150% activity

Day(s) Test Set Up

Monday through Friday

Test Classification and CPT Coding

85230