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Test ID EMICZ Emicizumab, Modified One Stage Assay Factor VIII, Plasma


Ordering Guidance


For monitoring factor VIII infusions or diagnosing hemophilia, order F8A / Coagulation Factor VIII Activity Assay, Plasma.



Necessary Information


If priority specimen, mark request form, give reason, and request a call-back.



Specimen Required


Specimen Type: Platelet-poor plasma

Patient Preparation: For at least 12 to 24 hours before specimen collection, the patient should not be given infusions of factor VIII concentrates.

Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube: Light-blue top (3.2% sodium citrate)

Submission Container/Tube: Plastic vial (polypropylene preferred)

Specimen Volume: 1 mL

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 plastic vial, leaving 0.25 mL in the bottom of centrifuged vial.

4. Freeze plasma immediately (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.


Useful For

Monitoring compliance or potential development of an antidrug antibody

 

This assay is not indicated for monitoring factor VIII infusions or for making a diagnosis of hemophilia.

Disease States

  • Hemophilia A

Method Name

Optical Clot-Based

Reporting Name

Emicizumab, modified OSA FVIII, P

Specimen Type

Plasma Na Cit

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Plasma Na Cit Frozen 42 days

Reference Values

<1 mcg/mL

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

80299

LOINC Code Information

Test ID Test Order Name Order LOINC Value
EMICZ Emicizumab, modified OSA FVIII, P 99614-0

 

Result ID Test Result Name Result LOINC Value
EMICZ Emicizumab, modified OSA FVIII, P 99614-0

NY State Approved

Yes

Day(s) Performed

Monday through Friday

Report Available

1 to 7 days

Forms

If not ordering electronically, complete, print, and send an Coagulation Test Request (T753) with the specimen.