Ordering Recommendation
Use to confirm cases of heterozygous or homozygous methemoglobin reductase deficiency.
Mnemonic
CYTOB5 RED
Methodology
Quantitative Spectrophotometry
Performed
Varies
Reported
3-6 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect
Yellow (ACD solution A or B). Also acceptable: Lavender (EDTA).
Specimen Preparation
Transport 6 mL whole blood in the original tube. (Min: 1 mL)
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.
Storage/Transport Temperature
Refrigerated.
Unacceptable Conditions
Remarks
Stability
Ambient: Unacceptable; Refrigerated: 18 days; Frozen: Unacceptable
Reference Interval
By Report
Interpretive Data
Compliance Category
Performed by non-ARUP Laboratory
Note
Hotline History
Hotline History
Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
N/A
CPT Codes
82657
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
3003819 | Cytochrome b5 Reductase Enzyme Activity | 32703-1 |
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
Cytochrome b5 Reductase Enzyme Activity
Mayo Clinic Laboratories