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Test Code LAB304 Factor V, Plasma

Important Note

***IMPORTANT***  Specimen must remain ambient.  Send via courier STAT.  Must arrive within 4 hours of collection.

Methodology

Absorbance measurement, Clot signature formation 

Literature References:

HemosIL RecombiPlasTin 2G (0020003050) package insert issued 09/2016, Instrumentation Laboratory.

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Specimen Requirements

Specimen Type: Plasma

Container/Tube: Light-blue top (citrate)

Specimen Volume: Full tube

Specimen Minimum Volume: Full tube

Collection Instructions: 

  1. Draw a discard blue top tube prior to drawing a light-blue top (citrated) tube if using a Winged Infusion Set.  Discard tube should be under filled and discarded.
  2. Clotted blood or an insufficient specimen is not acceptable.
  3. Avoid phlebotomy techniques which cause hemolysis and heparin contamination.
  4. Follow nursing policy on volume of blood to discard prior to collecting blood from indwelling heparinized catheters.

Analyte Stability:

4 hours at 18° C to 24° C.

Sample can not be refrigerated.

Transported frozen -20° C : When Factor V activity is performed on frozen plasma, the result obtained may be up to 15% lower compared to the result obtained on fresh plasma.


Additional Information: If the patient is a hospital patient and the hematocrit is >55%, call Barnes-Jewish Hematology Laboratory at 314-362-5203 for instructions.

Specimen Transport Temperature

Ambient Yes/Refrigerate NO/Frozen Yes, see disclaimer.

Specimen cannot be refrigerated.

Disclaimer: Frozen -20° C: When Factor V activity is performed on frozen plasma, the result obtained may be up to 15% lower compared to the result obtained on fresh plasma.

Reference Values

50%-125%

Literature References:

1. Colman RW, Hirsch J, Marder VJ, Salzman EW. Hemostasis and thrombosis, basic principles and clinical practice. Philadelphia: J.B. Lippincott Co., 1982.

2. Thompson AR, Harke LA. Manual of hemostasis and thrombosis, Edition 3. Philadelphia: F.A. Davis Co., 1983.

Day(s) Test Set Up

Monday through Sunday
Turnaround Time:
STAT: 2 hours after receipt in laboratory
Routine: 2-4 hours after receipt in the laboratory

Test Classification and CPT Coding

85220

Additional Information

For BJH Laboratory Use Only
Analyte Stability:

4 hours at 18° C to 24° C.
Specimen cannot be refrigerated.

 

Laboratory Processing Instructions:

Test performed in BJH Core Lab.

LOINC Code Information

Name LOINC Code
Factor V, Plasma 3192-2