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HelpTest Code METR1 Cytochrome b5 Reductase Enzyme Activity, Blood
Necessary Information
Specimen Required
Collection Container/Tube:
Preferred: Yellow top (ACD)
Acceptable: Lavender top (EDTA)
Specimen Volume: 6 mL
Collection Instructions: Send whole blood specimen in original tube. Do not aliquot.
Specimen Type
Whole Blood ACD-BSpecimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Whole Blood ACD-B | Refrigerated | 18 days |
Reject Due To
| Gross hemolysis | Reject |
Reference Values
≥12 months of age: 7.8-13.1 U/g Hb
Reference values have not been established for patients who are younger than 12 months.
Specimen Retention Time
7 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Day(s) Performed
Performed weekly
Report Available
1 to 6 daysCPT Code Information
82657