Arterial Blood Gas Values

Question 1

pH

Answer 1

Concentration of hydrogen ion.

7.35 - 7.45

Question 2

PaCO2

Answer 2

Arterial concentration of carbon dioxide.

35 - 45 mmHg

Question 3

PaO2

Answer 3

Arterial concentration of oxygen.

80-100 mmHg

Question 4

HCO3

Answer 4

Arterial concentration of serum bicarbonate.

22-26 mEq/L

Question 5

Oxygen saturation

Answer 5

Amount of oxygen bound to hemoglobin molecule in relation to maximum.

95-99%

Question 6

Base Excess

Answer 6

Amount of blood buffer that is present.

+2

Question 7

Abnormal pH

Answer 7

>7.45 = alkalosis
<7.35 = acidosis

Question 8

Abnormal PaCO2

Answer 8

>45 = respiratory acidosis
<35 = respiratory alkalosis

Question 9

Abnormal PaO2

Answer 9

<80 = hypoxemia
>100 = excess oxygen

Question 10

Abnormal HCO3

Answer 10

<22 = metabolic acidosis
>26 = metabolic alkalosis

Question 11

Abnormal oxygen saturation

Answer 11

<95% = inadequate oxygen bound to hemoglobin molecules.

Question 12

Abnormal Base Ecess

Answer 12

> +2 = alkalosis