ABG Interpretation

Below are the information obtained from an ABG except

• Acid base status

• Oxygenation

• Co2 elimination

• Respiratory rate of patient

Normal pH value

• 7.34-7.55

• 7.35-7.45

• 7.25-7.35

• 7.15-7.55

If pH normal + increased pCO2 + increased HCO3 = compensated respiratory acidosis

• True

• False

If pH normal + decreased HCO3 + decreased pCO2 = compensated metabolic acidosis

• True

• False

Below are the cause of Acidosis EXCEPT

• Hypoventilation

• Hyperventilation

• Diabetes

Causes of Alkalosis EXCEPT

• Hypoventilation

• Hyperventilation

• Gastric suction or vommiting

12 year old diabetic presents with Kussmaul breathing

pH : 7.05

pCO2: 12 mmHg

pO2: 108 mmHg

HCO3: 5 mEq/L

BE: -30 mEq/L

Interpret the ABG above

• Compensated metabolic acidosis

• Uncompensated metabolic acidosis

• Compensated respiratory acidosis

17 year old w/severe kyphoscoliosis, admitted for pneumonia

pH: 7.37

pCO2: 25 mmHg

pO2: 60 mmHg

HCO3: 22 mEq/L

BE : -7 mEq/L

Interpret the ABG above

• Compensated metabolic acidosis

• Uncompensated respiratory acidosis

• Compensated respiratory alkalosis

9 year old w/hx of asthma, audibly wheezing x 1 week

pH: 7.51

pCO2: 25 mmHg

pO2 35 mmHg

HCO3: 22 mEq/L

BE: -2 mEq/L

Interpret the ABG above

• Compensated metabolic acidosis

• Uncompensated respiratory alkalosis

• Compensated respiratory alkalosis

7 year old post op presenting with chills, fever and hypotension

pH: 7.25

pCO2: 35 mmHg

pO2: 55 mmHg

HCO3: 10 mEq/L

BE: -15 mEq/L

Interpret the ABG above

• Uncompensated metabolic acidosis

• Uncompensated respiratory alkalosis

• Compensated respiratory alkalosis