Mrs. Jamerson, who is in the post anesthesia care unit (PACU) following surgery, is difficult to arouse and demonstrates shallow breathing. The patient does not respond to any stimuli. The nurse assesses the patient and obtains arterial blood gas (ABG) measurements STAT. The ABG shows a pH of 7.10, PaCO2 of 70 mm Hg, and HCO3 of 24 mEq/L. What does this mean?
Respiratory Alkalosis Partially Compensated
Respiratory Acidosis Uncompensated
Metabolic Alkalosis Partially Compensated
Metabolic Acidosis Uncompensated
The Correct Answer is B
Choice A reason: Respiratory Alkalosis Partially Compensated is characterized by an elevated pH over 7.45 and a PaCO2 under 35 mmHg, with a compensatory acidic HCO3 under 22 mEq/L. This does not match the patient's ABG results.
Choice B reason: Respiratory Acidosis Uncompensated is indicated by an acidic pH under 7.35 and an elevated PaCO2 over 45 mmHg, with HCO3 in the normal range of 2226 mEq/L. The patient's ABG results show a low pH and high PaCO2, which aligns with this condition.
Choice C reason: Metabolic Alkalosis Partially Compensated would show a basic pH over 7.45 and a basic HCO3 over 26 mEq/L, with a compensatory acidic PaCO2 over 45 mmHg[^10^]. The patient's ABG values do not support this diagnosis.
Choice D reason: Metabolic Acidosis Uncompensated would present with an acidic pH under 7.35 and an acidic HCO3 under 22 mEq/L, with PaCO2 in the normal range of 3545 mmHg⁸. The patient's normal HCO3 level does not indicate metabolic acidosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Metabolic acidosis is characterized by a low pH and a low HCO3. However, George's HCO3 is within normal range, indicating that metabolic acidosis is not the primary issue.
Choice B reason: Partially compensated metabolic acidosis would present with a low pH and a low HCO3, along with a low PaCO2 as the body attempts to compensate. George's PaCO2 is elevated, which is not consistent with this condition.
Choice C reason: George's high PaCO2 and near normal HCO3 suggest that his primary issue is respiratory acidosis. The body has begun to compensate by retaining HCO3, making it partially compensated.
Choice D reason: Uncompensated respiratory acidosis would present with an elevated PaCO2 and a normal HCO3. Since George's HCO3 is elevated, it indicates partial compensation.

Correct Answer is C
Explanation
Choice A reason: Acute pain is expected with a fracture but does not specifically indicate impaired venous return.
Choice B reason: Ecchymosis, or bruising, can occur with a fracture due to bleeding into the tissue but is not a direct indicator of venous return issues.
Choice C reason: Increasing edema is a sign of impaired venous return as it indicates a buildup of fluid in the tissues, which can occur if the veins are not effectively returning blood to the heart.
Choice D reason: A diminishing distal pulse could indicate arterial impairment rather than venous return issues.
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