Test Name: Methemoglobin
Health Link Test Code: XMHGB
LIS Test Code: MHGB
CPT Code(s): 83050
Days Performed: Daily, 24 hours.
Stat In-Lab Turnaround Time: Less than 30 minutes.
For venous samples on outpatients, send patient to UWHC Outpatient Phlebotomy to be drawn.
Specimen: Arterial, venous, or capillary
Collection Container: Radiometer PICO® syringe
Also Acceptable: 2 full Radiometer capillary tubes
Radiometer "PICO"® syringes must be free of bubbles and clots. Two full Radiometer capillaries free of air bubbles and clots are needed for capillary blood.
Collection Volume: 1.5 mL
Pediatric Collection Volume: 0.5 mL
Sample Analyzed: Whole Blood
Testing Volume: 1.5 mL
Pediatric Testing Volume: 0.5 mL
Transport specimen to UWHC Hospital Laboratory immediately. Assure specimen receipt in the lab is within 15 minutes of collection.
Clotted specimens, specimens with air in the syringe, or specimens past stability time are not acceptable.
Up to 1.5% of total hemoglobin
Interpretation Type: Expected Results
Effective Date of Reference Range: Mon, 06 Jun 2016 07:00:00 CDT
Interferences due to lipemia or sulfhemoglobinemia are rare but may occur.
Critical Calls: yes
Cyanosis is evident when level reaches 10 to 15 % of total hemoglobin.