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Test Code MTHGB Methemoglobin, Blood, LAB91


Broad Spectrum Spectrometer Technology

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements


Preferred: Heparinized Syringe, whole blood

Acceptable: Dark Green tube, whole blood

                    Autopsy specimens are stored refrigerated until analysis can be done.

Specimen Volume: 150 uL of heparinized whole blood

Stability: Samples should be placed in ice water if they can not be run within 30 min. 

Reference Values


Results ≥5% are reported to the Iowa Disease Surveillance System

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding


Useful For

The measurement of oxidized hemoglobin which in high concentrations can be responsible for hypoxia and cyanosis.