Test Overview
Test Methodology

Kinetic Spectrophotometry (KS)

Test Usage

Evaluation of patients with cyanosis
Confirming cases of suspected cytochrome b5 reductase (methemoglobin reductase) deficiency
Functional studies in families with cytochrome b5 reductase deficiency

Reference Range *

> or = 12 months of age: 7.8-1.3 U/g Hb
Reference values have not been established for patients who are younger than 12 months

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Performed weekly
Analytic Time

2- 7 days

Soft Order Code
MMLR
Synonyms
    Laboratory
    Sendout
    Reference Laboratory
    Mayo METR1
    Section
    Special Testing
    Specimen Requirements
    Collection Instructions

    Collect specimen in an ACD yellow top tube. Do not aliquot, send intact whole blood to Specimen Processing refrigerated

    Special Handling

    Send specimen in original container, do not aliquot

    Alternate Specimen
    EDTA lav top tube
    Normal Volume
    6 mL whole blood
    Minimum Volume
    1 mL whole blood
    Storage Temperature
    Refrigerated
    Additional Information

    Test performed by Mayo Clinic Laboratories

    Billing
    CPT Code
    82657
    NY State Approved
    No