Methemoglobin
Label Mnemonic: MHB
Epic Lab Code: LAB91
Downtime Form: A-1a Critical Care/Special Care Nurseries Laboratory Requisition
Critical Care - Relocated to Core Laboratory
6240 RCP
356-3527
Specimen(s):
Whole Blood
Collection Medium:
Heparinized syringe or Green top tube (Na Heparin)
Minimum:
0.5 mL in Lithium/Sodium Heparin syringes or, 1 mL whole blood in Lithium/Sodium Heparin green top tube
Delivery Instructions:
Deliver to laboratory within 30 minutes of collection.
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
10 minutes (upon receipt in laboratory)
Reference Range:
<2%
Critical Value: >3%
Comments:
Can be ordered with blood gases (0.5 mL blood required); all needles must be removed from the syringe before delivery.

This test is also performed in the Iowa River Landing (IRL) clinical laboratory (for specimens drawn at that site).
Methodology:
Oximetric
CPT Code:
83050