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Test Code Billings Clinic: 9925 Blood Gases, Arterial

Important Note

This test needs to be drawn by the Respiratory Therapist. After collection the tube needs to be sent on ice to tube station 520 and the Respiratory Therapist in ICU needs to be voalted.

Performing Laboratory

Billings Clinic Pulmonary Laboratory

Methodology

Oximetry

Specimen Requirements

Specimen Collection/Transport:

  • Draw blood in a green-top (lithium heparin) tube
  • Send 2 mL of lithium heparin whole blood.
  • Place specimen on wet ice slush immediately after draw.
  • Avoid exposure of specimen to atmosphere.

Storage/Stability

Specimen Type Temperature Time
Whole Blood Li Heparin Refrigerated (Ice Slurry) 1 hour
  Ambient 30 minutes

Reference Values

pH
7.35 - 7.45
Call-back values:  <7.30 or >7.51


pCO2
35 - 45 mm Hg
Call-back values:  <30 mm Hg or >50 mm Hg

 

pO2
83 - 108 mm Hg
Call-back values:  <55 mm Hg or >130 mm Hg

 

HCO3

22 - 26 mmol/L

Call-back values:  <20 mmol/L or >28 mmol/L

 

Base

Newborn - 1 week:      -5 - 4 mmol/L             Call Back Value:  <-7 mmol/L or >5 mmol/L

1 week - 12 years:       -4 - 4 mmol/L             Call Back Value:  <-6 mmol/L or >5 mmol/L

>12 years:                    -2 - 2 mmol/L            Call Back Value:  <-5 mmol/L or >5 mmol/L

 

CO
Newborn - 12 years:     0 - 2%                      Call Back Value: >4%
>12 years:                    0.5 - 1.5%                Call Back Value: >4%


MT

Newborn - 12 years:     0 - 2%                      Call Back Value: >4%
>12 years:                    0.5 - 1.5%                Call Back Value: >4%

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

82805