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Factor 8 Activity
MessageCoagulation factors are necessary for the normal function of the extrinsic and intrinsic coagulation systems. A deficiency of any of the factors will limit the function of the coagulation cascade.
Test Code
F8
Alias/See Also
LAB3020214
CPT Codes
85240
Preferred Specimen
Whole blood collected in a blue sodium citrate tube
Minimum Volume
Tube must be filled completely
Instructions
MUST be collected only at the following locations:
- Duke Street Lab Testing
- Suburban Pavillion Lab Testing
- Women and Babies' Hospital Lab Testing
Specimen Stability
Plasma should be tested within 4 hours of collection at room temperature (20 - 25oC). If testing can not be done at this time, centrifuge the sample to obtain platelet poor plasma (PPP). Remove the PPP from the cells and freeze at -70oC.
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Specimens that are clotted, collected in the wrong tube, have visible gross hemolysis or have less than the expected fill.
Reference Range
| Sex | Age | Reference Range |
|---|---|---|
| M/F | 0 - 150 years | 63 - 149 % |
Performing Laboratory
Penn Medicine Lancaster General Health
