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

Note

Hotline History

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