NCLEX RN Prioritization Questions Related

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The nurse analyzes the results of a patient's arterial blood gases (ABGs). Which finding would require immediate action?

  • A. The bicarbonate level (HCO3) is 31 mEq/L
  • B. The arterial oxygen saturation (SaO2) is 92%
  • C. The partial pressure of CO2 in arterial blood (PaCO2) is 31 mm Hg
  • D. The partial pressure of oxygen in arterial blood (PaO2) is 59 mm Hg
Correct Answer: D

Rationale: While all the values are abnormal, the low PaO2 level of 59 mm Hg indicates that the patient is at a critical point on the oxyhemoglobin dissociation curve. At this level, a small decrease in PaO2 can lead to a significant drop in oxygen saturation and compromise tissue oxygenation. Therefore, immediate intervention is necessary to improve the patient's oxygenation status. Choice A (HCO3 of 31 mEq/L) may indicate metabolic alkalosis or compensation for respiratory acidosis; however, it does not require immediate action in this scenario. Choice B (SaO2 of 92%) is slightly low but not critically low to require immediate action. Choice C (PaCO2 of 31 mm Hg) is within the normal range and does not indicate immediate danger to the patient.