Whole blood or plasma on ice. Clotted sample. Sample collected in glass tube. Unspun specimen > 4 hrs old. Underfilled tube. Gross hemolysis.
Collection Comments
Full, 2.7mL Blue, BD 3.2% Na Citrate plastic tube. Do not send whole blood or plasma to lab on ice. Double spin and freeze plasma within 4 hrs of collection: Spin at 3000rpm for 15 min. Place top 2/3 of plasma in aliquot tube and spin aliquot at 3000 rpm for 15 min. Take top 2/3 of 2nd spin and put in another aliquot tube. Mark tube ‘plasma'. Freeze immediately. Send frozen platelet poor plasma. Do not send in glass tubes. Remember to properly label the aliquot tube with patient name, DOB, test and collect date.
The Chromogenic Factor X Assay is used for the quantitative determination of factor X, providing an alternate method to monitor oral anticoagulant (OAC) therapy when interference of the PT/INR is suspected. In cases of patients receiving both a direct thrombin inhibitor (DTI) and coumadin, response to coumadin may be monitored using the chromogenic factor X assay. This also applies to patients with an antiphospholipid antibody while on coumadin therapy.
Performed
Monday - Friday; Days
Methodology
Chromogenic Assay
Reported
4 hours
Performing Lab
Special Coag
Synonyms
555
ChrmFacX
ChrmgX
Factor X Assay, Chromogenic
Chromogenic Factor X
Reference Interval
70 - 133%
Clinical Interpretation
The Thrombosis & Hemostasis Laboratory established a therapeutic range for the chromogenic factor X assay for patients receiving OAC therapy to aid in the interpretation of results. Values between 15% and 51% correlate to an INR therapeutic range of 2.0to 3.5.
CPT Codes
85130
LOINC Codes
NAME
LOINC
Order
Chromogenic Factor X Assay
28657-5
Result
Chromogenic Factor X
28657-5
Test Code (Outreach Synonym)
555
Catalog Code
27145386
Collection
Collect
Blood, Light Blue
Preferred Draw Volume
2.7 mL
Minimum Draw Volume
Full Tube
Unacceptable Conditions
Whole blood or plasma on ice. Clotted sample. Sample collected in glass tube. Unspun specimen > 4 hrs old. Underfilled tube. Gross hemolysis.
Collection Comments
Full, 2.7mL Blue, BD 3.2% Na Citrate plastic tube. Do not send whole blood or plasma to lab on ice. Double spin and freeze plasma within 4 hrs of collection: Spin at 3000rpm for 15 min. Place top 2/3 of plasma in aliquot tube and spin aliquot at 3000 rpm for 15 min. Take top 2/3 of 2nd spin and put in another aliquot tube. Mark tube ‘plasma'. Freeze immediately. Send frozen platelet poor plasma. Do not send in glass tubes. Remember to properly label the aliquot tube with patient name, DOB, test and collect date.
The Chromogenic Factor X Assay is used for the quantitative determination of factor X, providing an alternate method to monitor oral anticoagulant (OAC) therapy when interference of the PT/INR is suspected. In cases of patients receiving both a direct thrombin inhibitor (DTI) and coumadin, response to coumadin may be monitored using the chromogenic factor X assay. This also applies to patients with an antiphospholipid antibody while on coumadin therapy.
Performed
Monday - Friday; Days
Methodology
Chromogenic Assay
Reported
4 hours
Performing Lab
Special Coag
Synonyms
555
ChrmFacX
ChrmgX
Factor X Assay, Chromogenic
Chromogenic Factor X
Result Interpretation
Reference Interval
70 - 133%
Clinical Interpretation
The Thrombosis & Hemostasis Laboratory established a therapeutic range for the chromogenic factor X assay for patients receiving OAC therapy to aid in the interpretation of results. Values between 15% and 51% correlate to an INR therapeutic range of 2.0to 3.5.
