1951 Factor X Activity

Factor X Activity CLOT DET  75 - 150  % 

Specimen Requirements
1 Plasma Citrated 2 (1) mL   Frozen - 14 Day(s) See COLLECTION INSTRUCTIONS for platelet-poor plasma. 

Clinical utility
Factor X deficiency can cause severe bleeding after surgery or trauma, as well as repeated abortion and pre-term delivery, or bleeding from the umbilical cord stump in neonates.

Collection Instruction
Instructions for platelet-poor plasma:
1. Draw a plain red top tube to remove tissue fluid contamination.
Discard this tube.
2. Draw blood into a buffered citrate collection tube (light blue
top) filled to proper level. Do not overfill.
3. The blood-to-anticoagulant ratio should be 9:1; inadequate
filling of the collection device will decrease this ratio and
may lead to inaccurate results.
4. Adjust the final citrate concentration in the blood of
patients who have hematocrit values above 0.55 (55%). For
hematocrits below 20%, there is no current data to
support a recommendation for adjusting the citrate concentration.
5. The needle gauge could be between 19-22. For pediatric
patients a 21-23 gauge needle may be used.
6. Invert gently 6 times to mix. Process immediately.
7. Centrifuge for 15 min at 2500 x g.
8. Remove plasma using a plastic pipette to transfer into a
new tube.
9. Repeat centrifugation at 2500 x g for 15 minutes to assure
complete platelet removal.
10. Dispense the plasma into 2 or more plastic tubes using a
plastic transfer pipette. Label tubes appropriately.
11. Freeze immediately at -70 C.
12. Specimen must remain frozen at all times. Ship to Specialty
within 24 hours on dry ice.
13. Specimen should not be submitted if:
* it is hemolyzed
* microclots are present
* the tube is less than 90% filled
* a specimen with hematocrit >55% is collected without anticoagulant

Reported: Same day

CPT Code: 85260