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Laboratory Medicine

Test catalogue

CarboxyHemoglobulin

Test Name

CarboxyHemoglobulin

Green Tube Specimen Type / Requirements

Container Type = 1 Green Tube

Minimum 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 syringes or capillary tubes. Samples may be arterial, venous or capillary.

 • Plastic syringe samples: Analyze as quickly as possible preferably within 30 minutes of collection at room temperature

 • Capillary samples: Analyzed within 5 minutes at room temperature whenever possible

 • Lactate, carboxyhemoglobin, and methemoglobin samples collected in heparin (green top) vacutainer analyzed within 30 minutes.

 • Write your initials, date and time of collection on the collection label or requisition.

Laboratory Staff Instructions: Plastic syringe samples: Analyze as quickly as possible preferably within 30 minutes of collection at room temperature.

Rejection Criteria: Gross hemolysis, Unlabeled or Not Sufficient Quantity Samples will be rejected.

Stability: 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

Routine

Reference Value

Non-smoker < 0.02

Smoker < 0.09

Test Code

COHB

Methodology

CO-Oximetry

Testing Location

SMH-Biochemistry

Other Information

Last Updated: June 06, 2019