Test Code F10T Factor X Inhibitor Titer
Specimen Type
Plasma
Container/Tube
Light blue top tube, 3.2% sodium citrate
Offsite Collection Instructions
- Samples must be centrifuged at >1500 x g for 10 minutes
at
room temperature. - Carefully remove plasma from the cells using a plastic
transfer
pipette avoiding the buffy coat. - Aliquot the removed plasma into 2 plastic tubes containing
a
minimum of 1000 uL of specimen in each tube. - The plasma samples must then be frozen at -20C.
- Once solidly frozen they must be shipped on dry ice.
Samples
that have thawed in transit will be rejected. -
Note: For clients who do not have access to dry ice do not
freeze the specimen. Follow the centrifugation instructions or
send
the whole blood sample. It now becomes vital that the specimen
arrives in the lab within three hours of collection.
Turnaround Time
Monday to Friday: 20 hours.
Test Includes
The test includes Factor X inhibitor titer
Preferred Volume
2 mL
UCMC Collection Instructions
Sample may be collected at anytime. Samples received in the
lab
after 12:00 pm (Monday-Thursday) will be run the next morning.
Samples received after 12:00 pm on Friday will be run on Monday
morning.
Test Usage
Bethesda assay for Factor X inhibitor titers generally
performed only in the setting of significantly decreased levels
of
Factor X.
Additional Information
All 3.2% sodium citrate light blue top tubes require a ratio
of
9 parts blood to 1 part anticoagulant (example: a 3.0 mL tube
requires 2.7 mL blood added to 0.3 mL of anticoagulant).
Fee Code
30685335
Synonyms
Factor X (10) Inhibitor Titer
Critical Results
n/a
STAT Turnaround Time
n/a
Specimen Minimum Volume
1 mL
DAY(S) AND TIME(S) PERFORMED
Monday - Friday, 8:00 am to 12:00 noon
STAT DAY(S) AND TIME(S) PERFORMED
Not Available
CPT
85335
Method Name
Clotting
Reference Values
<0.6 Bethesda Units
Reject Due To
Specimens that have wrong ratio of blood to anticoagulant
(over
drawn or under drawn) clotted or grossly hemolyzed.