Blood Gas Normals

Question 1

ABG for ELBW

GA age < 28wks

Answer 1

pH >/= 7.25
PaCO2 45-55 mmHg
PaO2 45-65 mmHg
HCO3 15-18 mmol/L

Question 2

ABG for VLBW

GA age 28-40 wks

Answer 2

pH >/= 7.25
PaCO2 45-55 mmHg
PaO2 50-70 mmHg
HCO3 18-20 mmol/L

Question 3

ABG for Infant - Child

GA age 40 wks - 2 yrs

Answer 3

pH 7.30-7.40
PaCO2 30-40 mmHg
PaO2 80-100 mmHg
HCO3 20-22 mmol/L

Question 4

ABG for Toddler - Adult

GA age > 2 yrs old

Answer 4

pH 7.35-7.45
PaCO2 35-45 mmHg
PaO2 80-100 mmHg
HCO3 22-24 mmol/L

Question 5

Venous for Adults

VBG or Mixed

Answer 5

pH        7.30-7.40
PvCO2 40-50 mmHg
PvO2    35-40 mmHg
HCO3   22-26 mmol/L
SvO2    70-75 mmHg

Question 6

Umbilical Vein Gases

Oxygenated blood

Answer 6

pH >/= 7.32
PaCO2 38 mmHg
PaO2 27 mmHg
HCO3 20 mmol/L

Question 7

Umbilical Arteries Gases

Venous blood

Answer 7

pH >/= 7.24
PaCO2 49 mmHg
PaO2 16 mmHg
HCO3 19 mmol/L

Question 8

PaO2 values
Normal
Mild Hypoxemia
Moderate Hypoxemia
Severe Hypoxemia

Answer 8

80-100 Normal
60-79 Mild
40-59 Moderate
< 40 Severe