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Mayo Clinic Laboratories

Test Code METHGB Methemoglobin, Blood

Performing Laboratory

NRL-Chemistry

Methodology

Spectrophotometry (SP)

Specimen Requirements

Specimen Type: Blood

Container/Tube: Dry, lithium heparin syringe

Specimen Volume: 1 mL

Collection Instructions:

1. Expel air bubbles and remove needle from syringe and cap.

2. Label specimen as blood.

Additional Information: Patient’s age is required.

Reference Values

0.0%-1.9%

Day(s) Test Set Up

Monday through Sunday

Turnaround Time:

STAT-1 hour

Routine-2 hours

Specimen Transport Temperature

Refrigerate

Test Classification and CPT Coding

83050