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Carboxyhemoglobin and Methemoglobin, Blood - Saskatoon

Discipline

Biochemistry

Overview

Alias

  • COHb
  • Met-Hb
  • Methemoglobin

Specimen Information

Specimen types accepted

  • Whole Blood

Specimen collection container

  • Preferred Collection Container: Blood – Syringe (calcium and electrolyte balanced), capillary (calcium and electrolyte balanced)
  • Alternative Collection Container: Blood – Dark Green (Lithium Heparin)

Collection procedure

  • To avoid clotting sample contents in the syringe or tube must be mixed 

Required volume

  • Optimal Volume: 1.0 mL
  • Pediatric Volume: 0.5 mL

          (In some situations, a minimum volume may require a second collection.)

  • Capillary Volume: 125 μL

        (In some situations, a minimum volume may require a second collection.)

Transport and stability

  • 24 hours

Rejection criteria

Performance

Methodology

  • Spectrophotometric assay

Days/times performed

Availability
  • 24 hours a day
Testing Site
  • RUH
  • SPH
  • SCH
  • Rural-Humboldt

Maximum laboratory time

  • In hospital reported within 2 hours

Specimen retention time

  •  Syringe specimens are discarded immediately after testing

Last Updated: October 8, 2024