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Test Code LAB91 Methemoglobin

Important Note

Avoid air bubbles.

Place specimen in outside pocket of a pre-filled biohazard bag of ice, then put into a separate biohazard bag for transport.

Clinical System Name

Methemoglobin

Synonyms

LAB91

MET HGB

Met Hb
 

Sample Requirements

Specimen:  Whole Blood

Container(s): Heparinized Syringe, 2 Capillary Blood Gas Tubes

Preferred Vol: 1.0 mL in a Heparinized Syringe or 2 Full Capillary Blood Gas Tubes

Minimum Vol: 2 Heparinized Capillary Blood Gas Tubes. (EPOC capillary tubes are not acceptable).

 

Note: Ideally, specimens should be analyzed within 10 minutes of drawing and not exposed to air bubbles. Expel air from syringe and cap it immediately after obtaining the sample. Capillary tubes must be filled completely and mixed thoroughly to dissolve and disperse the heparin. Specimens may be run up to 30 minutes after drawing when stored at 0-4°C.

Processing Instructions

Deliver to Core Lab. Notify technologist - STAT

Reject due to: Inadequately filled specimens, air bubbles, visible clots, age of specimen

Spin: N

Aliquot: N

Temp: 0-4 C

Storage location: Core Lab Fridge

 

Off-site collection:  Sample must be collected at Children's. Please contact Laboratory (206) 987-2617 for additional information.

Stability

Specimen Type Temperature Time

Heparinized Syringe, Heparinized Capillary Blood Gas Tube

 RT ≤ 15 min

Heparinized Syringe, Heparinized Capillary Blood Gas Tube

 0-4 C ≤ 30 min
  -20 C or -70 C N

Availability

STAT Performed TAT
Y 24/7 15 min

Performing Laboratory

Seattle Children's Laboratory    

Department

Department:  Chemistry - Core

Phone Number: 206-987-2617 (Client Services)

CPT Codes

83050

Methodology

Method:  Oximetry by SIEMENS RAPIDPOINT 500

Analytical Volume: 1 Full Heparinized Capillary Blood Gas Tube or 0.5 mL Heparinized Syringe

Reference Range

Less than 2% of total hemoglobin.