Acid / Base DSA

Question 1

Normal range for PaO2

Answer 1

80-100 mm Hg

Question 2

Normal range for PaCO2

Answer 2

35-45 mm Hg. Use 40 mm Hg

Question 3

Normal range for arterial pH (pHa)

Answer 3

7.35-7.45. Use 7.40 mm Hg

Question 4

Normal range for arterial bicarbonate (HCO3)

Answer 4

22-26 mEq/L. Use 24 mEq/L

Question 5

What can change the HCO3?

Answer 5

1. ) The kidneys by kicking HCO3 into the urine or H+ into the urine
2. ) The GI tract secretes a lot of HCO3 and H+. Vomiting and diarrhea can deplete HCO3
3. ) Ingesting too many tums, become alkalotic
4. ) Use up HCO3 by making acid (lactic acid, ketoacidosis)

These are all metabolic changes

Question 6

What happens to pHa if you increase HCO3?

Answer 6

Increase in pHa

Question 7

What happens to pHa if you decrease HCO3?

Answer 7

Decrease in pHa

Question 8

What does an increase in CO2 always lead to?

Answer 8

Acidosis

Question 9

What does a decrease in CO2 lead to?

Answer 9

Alkalosis

Question 10

Is a change in HCO3 metabolic or respiratory in nature?

Answer 10

Metabolic

Question 11

Is a change in CO2 metabolic or respiratory in nature

Answer 11

Respiratory