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HelpTest Code CH9M Chromogenic Factor IX Activity Assay, Plasma
Additional Codes
| EPIC EAP | Mayo |
| LAB1945 | CH9 |
Ordering Guidance
Coagulation testing is highly complex, often requiring the performance of multiple assays and correlation with clinical information. For that reason, ALBLD / Bleeding Diathesis Profile, Limited, Plasma is recommended.
Necessary Information
Specimen Required
Specimen Type: Platelet-poor plasma
Collection Container/Tube: Light-blue top (3.2% sodium citrate)
Submission Container/Tube: Polypropylene plastic vial
Specimen Volume: 1 mL Platelet-poor plasma
Collection Instructions:
1. For complete instructions, see Coagulation Guidelines for Specimen Handling and Processing
2. Centrifuge, transfer all plasma into a plastic vial, and centrifuge plasma again.
3. Aliquot plasma into a separate plastic vial leaving 0.25 mL in the bottom of centrifuged vial.
4. Immediately freeze plasma (no longer than 4 hours after collection) at -20° C or, ideally, at -40° C or below.
Additional Information:
1. Double-centrifuged specimen is critical for accurate results as platelet contamination may cause spurious results.
2. Each coagulation assay requested should have its own vial.
Forms
If not ordering electronically, complete, print, and send a Coagulation Test Request (T753) with the specimen.
Useful For
Monitoring coagulation factor replacement therapy of selected extended half-life coagulation factor replacements
Aiding in the diagnosis of hemophilia B using a 2-stage assay, especially when a 1-stage assay was normal
Special Instructions
Reporting Name
Chromogenic FIX, PSpecimen Type
Plasma Na CitSpecimen Minimum Volume
Platelet-poor plasma: 0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Plasma Na Cit | Frozen | 14 days |
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |
Day(s) Performed
Monday through Friday
Report Available
1 to 3 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
85130
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CH9 | Chromogenic FIX, P | 88449-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| CH9 | Chromogenic FIX, P | 88449-4 |
Method Name
Chromogenic