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Test Code LAB758 Factor X, Plasma

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Absorbance measurement, Clot signature formation 

Literature References:

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

Platelet-free plasma can be frozen at -20 for transport on dry ice up to 72 hours
or stored 6 months at -70° C.


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.

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

85260

Reference Values

60%-160%

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.

Specimen Transport Temperature

Ambient Yes/Refrigerate NO/Frozen Yes

Additional Information

For BJH Laboratory Use Only
Analyte Stability:

4 hours at 18° C to 24° C.

Platelet-free plasma can be frozen at -20 for transport on dry ice up to 72 hours
or stored 6 months at -70° C.

Laboratory Processing Instructions:

Test performed in BJH Core Lab.

LOINC Code Information

Name LOINC Code
Factor X, Plasma 3217-7