Jun 6, 2016




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Blood Gas


Methemoglobin (XMHGB) Blood Gas Lab Test

Name: Methemoglobin

Test Name: Methemoglobin

Health Link Test Code: XMHGB

LIS Test Code: MHGB

CPT Code(s): 83050

Methodology: Spectrophotometry

Days Performed: Daily, 24 hours.

Stat In-Lab Turnaround Time: Less than 30 minutes.

Patient Preparation:

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

Collection Instructions:

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

Stability Ambient:

30 minutes

Stability Frozen:

Not acceptable

Sample Analyzed: Whole Blood

Testing Volume: 1.5 mL

Pediatric Testing Volume: 0.5 mL

Specimen Transport:

Transport specimen to UWHC Hospital Laboratory immediately. Assure specimen receipt in the lab is within 15 minutes of collection.

Unacceptable Criteria:

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

Test Limitations:

Interferences due to lipemia or sulfhemoglobinemia are rare but may occur.  

Critical Calls: yes

Additional Information:

Cyanosis is evident when level reaches 10 to 15 % of total hemoglobin.