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HelpTest Code BGMSG Blood Gases, Specify Requested Test
Methodology
pH: Potentiometric Method Using Standard Ion-Selective Electrode (ISE)
pCO2: Modified Potentiometric Method Based on the Principles of the Severinghaus Electrode
pO2: Amperometric Measurement Based on the Principles of the Clark Electrode
Lactic Acid: Amperometrically
Carboxyhemoglobin: Cooximetry
Methemoglobin: Cooximetry
O2 Hemoglobin: Cooximetry
Includes carboxyhemoglobin, hemoglobin, lactic acid, methemoglobin, O2, pCO2, ph, and PO2.
Performing Laboratory
RCRH-Respiratory Therapy
Specimen Requirements
For whole blood specimen, use a syringe or capillary tube containing balanced heparin or lithium heparin. Other anticoagulants, such as benzalkonium heparin, EDTA, citrate, oxalate, and fluoride significantly affect blood pH.
Note: Please fill out requisition that prints after order, and send specimen to the laboratory.
|
Specimen Type |
Collection Device |
Minimum Volume |
Preparation |
|
Arterial Blood |
Syringe |
200 µL for 1 mL syringe 800 µL for 3 mL syringe 1.5 mL for 5 mL syringe |
Expel air from syringe and cap immediately after obtaining specimen. |
| Venous Blood |
Syringe |
200 µL for 1 mL syringe 800 µL for 3 mL syringe 1.5 mL for 5 mL syringe |
Expel air from syringe and cap immediately after obtaining specimen. |
| Capillary Blood |
Capillary Tube |
100 µL balanced heparin tubes (minimum volume: 100 µL) |
Fill tube completely and cap securely. |
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
82375 - carboxyhemoglobin
82803 - blood gas, venous
82805 - blood gas, arterial
82810 - O2 hemoglobin
83050 - methemoglobin
83605 - lactic acid