Interpret the following ABG: pH 7.49, pCo2 30 mmHg, HCO3 23 Meq/L. PaO2 96 mmHg. SaO2 98%

respiratory alkalosis

metabolic alkalosis

respiratory acidosis.

metabolic acidosis

Answer and Explanation

The Correct Answer is A

Rationale:

A. pH: 7.49 is elevated (normal range: 7.35–7.45), indicating alkalosis. PaCO₂: 30 mmHg is low (normal range: 35–45 mmHg), reflecting respiratory alkalosis. HCO₃⁻: 23 mEq/L is normal (normal range: 22–26 mEq/L) → Not a metabolic cause. PaO₂: 96 mmHg and SaO₂: 98% indicates normal oxygenation. Since the pH is high (alkalotic), and the PaCO₂ is low (respiratory alkalosis cause), and HCO₃⁻ is normal, the imbalance is uncompensated respiratory alkalosis

B. Metabolic alkalosis would show high pH and high HCO₃⁻

C. Respiratory acidosis would show low pH and high PaCO₂

D. Metabolic acidosis would show low pH and low HCO₃⁻

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Correct Answer is A

Explanation

Rationale:
A. The pH is on the upper edge of normal, indicating alkalosis. The HCO₃ is elevated (30 mEq/L), pointing to a metabolic cause (consistent with vomiting, which leads to hydrogen ion loss). The low pCO₂ (30 mmHg) suggests respiratory compensation for the metabolic alkalosis.
B. Respiratory acidosis is associated with low pH and high pCO₂, which are not present here.
C. Respiratory alkalosis would show high pH and low pCO₂ with normal or low HCO₃ — not elevated HCO₃.
D. Although the pH is within the normal range (7.35–7.45), the values of pCO₂ and HCO₃ are both abnormal, indicating compensated metabolic alkalosis, not a normal ABG.

Correct Answer is ["0.5"]

Explanation

Rationale:
To calculate the correct dose:

Ordered dose: 12.5 mg
Available dose: 25 mg per suppository

Calculation:
12.5 mg ÷ 25 mg = 0.5 suppository
The nurse will administer 0.5 suppository rectally.

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Interpret the following ABG: pH 7.49, pCo2 30 mmHg, HCO3 23 Meq/L. PaO2 96 mmHg. SaO2 98%

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A female client is in the first trimester of pregnancy. She has experienced approximately one week of severe nausea with frequent vomiting. Interpret the following ABG for this patient. pH 7.44, pCO2 30. HCO3 30.

Correct Answer is A

Explanation

The physician orders Phenergan 12.5mg supp rectally NOW for nausea and vomiting. Available is Phenergan 25mg supp. How many suppositories will the nurse administer?

Correct Answer is ["0.5"]

Explanation

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