Laboratory Medicine

Test Catalogue

Methemoglobin (MEHB)
Test Name Methemoglobin (MEHB)
Specimen Type / Requirements Container Type = 1 Green Tube Minimum Testing Volume = 2 ml Blood Tube must fill to at least ½ or greater of its vacuum capacity
Specimen Handling Collection Instructions: Whole blood samples collected in heparinized tube, syringes or capillary tubes. Samples may be arterial, venous or capillary. Write your initials, date and time of collection on the collection label or requisition. • Plastic Syringe Samples on ice should be analyzed as soon as possible preferably within 30 mins of collection. • Capillary Samples on ice should be analyzed as soon as possible or within 5 minutes if received at room temperature. • Specimen in heparinized green top vacutainer analyzed within 30 minutes. Laboratory Staff Instructions: Do not spin. Specimens should be delivered to the gas bench as soon as posible. Rejection Criteria: Gross hemolysis, unlabeled or samples of non specific quantity. Stability: Heparinized tube are stable at 2 – 8°C for 1 week. Transportation: Send sample on ice to core lab as soon as possible.
Required Documentation
Turnaround Time (TAT) 30 Mins	Test Utilization
Reference Value < 0.02
Test Code MEHB	Methodology CO-Oximetry (Spectrometer/Absorption spectra)
Testing Location SMH-Biochemistry	Other Information Last Updated: Oct 29, 2021

Methemoglobin (MEHB)

Test Name

Methemoglobin (MEHB)

Specimen Type / Requirements

Container Type = 1 Green Tube

Minimum Testing Volume = 2 ml Blood

Tube must fill to at least ½ or greater of its vacuum capacity

Specimen Handling

Collection Instructions: Whole blood samples collected in heparinized tube, syringes or capillary tubes. Samples may be arterial, venous or capillary. Write your initials, date and time of collection on the collection label or requisition.

• Plastic Syringe Samples on ice should be analyzed as soon as possible preferably within 30 mins of collection.

• Capillary Samples on ice should be analyzed as soon as possible or within 5 minutes if received at room temperature.

• Specimen in heparinized green top vacutainer analyzed within 30 minutes.

Laboratory Staff Instructions: Do not spin. Specimens should be delivered to the gas bench as soon as posible.

Rejection Criteria: Gross hemolysis, unlabeled or samples of non specific quantity.

Stability: Heparinized tube are stable at 2 – 8°C for 1 week.

Transportation: Send sample on ice to core lab as soon as possible.

Required Documentation

Turnaround Time (TAT)

30 Mins

Test Utilization

Reference Value

< 0.02

Test Code

MEHB

Methodology

CO-Oximetry (Spectrometer/Absorption spectra)

Testing Location

SMH-Biochemistry

Other Information

Last Updated: Oct 29, 2021