A nurse is caring for a post-operative patient with a respiratory rate of 9 breaths/minute secondary to general anesthesia effects and incisional pain. Which arterial blood gas (ABG) would the nurse anticipate?

pH 7.50, pO2 85, pCO2 35, HCO3 30 mEq/L

pH 7.30, pO2 90, pCO2 35, HCO3 20 mEq/L

pH 7.50, pO2 95, pCO2 25, HCO3 22 mEq/L

pH 7.30, pO2 80, pCO2 55, HCO3 22 mEq/L

Answer and Explanation

The Correct Answer is D

Choice A reason: The values pH 7.50, pO2 85, pCO2 35, HCO3 30 mEq/L indicate alkalosis with a high bicarbonate level, which is not consistent with the patient’s slow respiratory rate that would typically lead to respiratory acidosis.

Choice B reason: The values pH 7.30, pO2 90, pCO2 35, HCO3 20 mEq/L indicate metabolic acidosis with normal pCO2, which does not align with the respiratory issue described (hypoventilation).

Choice C reason: The values pH 7.50, pO2 95, pCO2 25, HCO3 22 mEq/L indicate respiratory alkalosis, which is characterized by a low pCO2. This is not consistent with the patient’s hypoventilation, which would lead to elevated pCO2 levels.

Choice D reason: The values pH 7.30, pO2 80, pCO2 55, HCO3 22 mEq/L indicate respiratory acidosis, which aligns with the patient’s hypoventilation due to anesthesia effects and incisional pain. The elevated pCO2 and decreased pH are consistent with reduced respiratory rate and shallow breathing.

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Correct Answer is A

Explanation

Choice A reason: Labored and shallow respirations indicate that the patient is struggling to breathe and may not be ventilating effectively. This can quickly lead to respiratory fatigue and failure, and it requires immediate intervention to support the patient's airway and breathing.

Choice B reason: A PaO2 level of 50 mmHg is significantly low, indicating hypoxemia. This is concerning and requires attention, but the immediate visual and tactile signs of labored and shallow breathing take precedence as they are indicative of the patient's overall respiratory effort and ability to maintain adequate ventilation.

Choice C reason: A PaCO2 level of 32 mmHg is low and suggests hyperventilation. While this finding is important, it is not as immediately critical as labored and shallow respirations, which can quickly deteriorate into complete respiratory failure.

Choice D reason: A respiratory rate of 32 breaths/min indicates tachypnea, which is a sign of respiratory distress. However, the quality of respirations (labored and shallow) is a more immediate concern as it directly affects the patient's ability to ventilate and oxygenate effectively.

A. The client diagnosed with mitral valve stenosis who has heart palpitations. B. The client diagnosed with arterial occlusive disease who has intermittent claudication. C. The client diagnosed with deep vein thrombosis who has an edematous right calf. D. The client diagnosed with heart failure who has pink frothy sputum.

Correct Answer is D

Explanation

Choice A reason: The client with mitral valve stenosis experiencing heart palpitations is at risk of complications such as atrial fibrillation, which can lead to embolic events. While this is a serious condition that needs attention, it is not as immediately life-threatening as the presence of pink frothy sputum in a heart failure patient.

Choice B reason: The client with arterial occlusive disease and intermittent claudication is experiencing pain due to reduced blood flow to the extremities during activity. Although this condition requires management to prevent worsening ischemia, it is not as critical as the presentation of pink frothy sputum in a heart failure patient.

Choice C reason: The client with deep vein thrombosis (DVT) and an edematous right calf is at risk of developing a pulmonary embolism, which is a serious condition. However, the immediate symptoms do not suggest a current life-threatening emergency compared to the client with heart failure and pink frothy sputum.

Choice D reason: The client with heart failure who has pink frothy sputum must be assessed first. Pink frothy sputum is a sign of pulmonary edema, indicating severe left-sided heart failure. This condition is a medical emergency as it impairs gas exchange and can lead to respiratory failure if not promptly treated. Immediate intervention is necessary to stabilize the client's respiratory and cardiac status.

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A nurse is caring for a post-operative patient with a respiratory rate of 9 breaths/minute secondary to general anesthesia effects and incisional pain. Which arterial blood gas (ABG) would the nurse anticipate?

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