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Methemoglobin

Source Blood
Mnemonic MTHB
Specimen Requirements

DO NOT use plasma separator tube (PST).

1 x 4 mL dark green top sodium heparin tube or 1 x 4 mL dark green lithium heparin tube.
Whole blood.

Pediatric: 2.0 mL whole blood in a 1 x 4 mL dark green top sodium heparin tube or 1 x 4 mL dark green lithium heparin tube, or a dark green top lithium heparin non-PST microcollection tube filled completely.

Specimen Handling

Store samples on ice immediately after collection. On ice (at 4˚C) the heparinized whole blood is stable for up to 8 hours. 
DO NOT freeze.
DO NOT centrifuge.
DO NOT open tube.

Specimen MUST be tested within 8 hours of collection.

Additional Information CLS Accession:
If a specimen arrives from a non-CLS site, enter into PathNet before delivering to Chemistry.
Testing Location Chemistry-ACH, FMC, PLC, RGH, SHC
Rural: BMSH, CMGH, DDHS, HRH, SDHS
Testing Frequency As required
Alternate Name(s)
Reference Interval

8 - 150 years: 0.0 - 1.5 %

Click here for critical values.