Interpret the ABG results: pH: 7.48, PaCO2: 28 mmHg, PaO2: 55 mmHg, HCO3-: 24 mEq/L, SaO2: 87%
Metabolic alkalosis with hypoxemia
Respiratory alkalosis with hypoxemia
Metabolic acidosis with hypoxemia
Respiratory acidosis with hypoxemia
The Correct Answer is B
Choice A reason: Metabolic alkalosis shows pH >7.45 with HCO3- >26 mEq/L from base excess. Here, pH is 7.48, but HCO3- is normal at 24 mEq/L, ruling out metabolic cause. PaO2 of 55 mmHg indicates hypoxemia, but the primary issue isn’t metabolic.
Choice B reason: Respiratory alkalosis occurs with pH >7.45 and PaCO2 <35 mmHg from hyperventilation. Here, pH is 7.48, PaCO2 is 28 mmHg, and HCO3- is normal, confirming respiratory etiology. PaO2 of 55 mmHg shows hypoxemia, matching this acute ventilatory pattern.
Choice C reason: Metabolic acidosis has pH <7.35 and HCO3- <22 mEq/L from acid gain. Here, pH is 7.48 and HCO3- is 24 mEq/L, contradicting acidosis. PaO2 of 55 mmHg indicates hypoxemia, but the acid-base status is alkalotic, not acidic.
Choice D reason: Respiratory acidosis features pH <7.35 and PaCO2 >45 mmHg from CO2 retention. Here, pH is 7.48 and PaCO2 is 28 mmHg, showing CO2 loss, not retention. Hypoxemia (PaO2 55 mmHg) is present, but the pattern is alkalotic.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","C","D"]
Explanation
Choice A reason: Speech therapists assess swallowing in tracheostomy patients, as the tube alters airway dynamics. Collaboration ensures safe oral intake, preventing aspiration, a critical task aligning with their expertise in dysphagia management.
Choice B reason: Physical therapists plan mobility in tracheostomy care, enhancing strength and preventing atrophy. Collaboration promotes early activity, improving respiratory muscle function and recovery, tailored to the patient’s physical capacity.
Choice C reason: Respiratory therapists provide tracheostomy care, like suctioning and cuff management, maintaining airway patency. Collaboration ensures proper technique, reducing infection or obstruction risks, a core responsibility in respiratory support.
Choice D reason: Dietitians recommend nutrition plans for tracheostomy patients, addressing caloric and swallowing needs. Collaboration optimizes healing and energy, adjusting diets (e.g., thickened liquids) to support recovery and prevent complications.
Correct Answer is B
Explanation
Choice A reason: Metabolic alkalosis shows pH >7.45 with HCO3- >26 mEq/L from base excess. Here, pH is 7.48, but HCO3- is normal at 24 mEq/L, ruling out metabolic cause. PaO2 of 55 mmHg indicates hypoxemia, but the primary issue isn’t metabolic.
Choice B reason: Respiratory alkalosis occurs with pH >7.45 and PaCO2 <35 mmHg from hyperventilation. Here, pH is 7.48, PaCO2 is 28 mmHg, and HCO3- is normal, confirming respiratory etiology. PaO2 of 55 mmHg shows hypoxemia, matching this acute ventilatory pattern.
Choice C reason: Metabolic acidosis has pH <7.35 and HCO3- <22 mEq/L from acid gain. Here, pH is 7.48 and HCO3- is 24 mEq/L, contradicting acidosis. PaO2 of 55 mmHg indicates hypoxemia, but the acid-base status is alkalotic, not acidic.
Choice D reason: Respiratory acidosis features pH <7.35 and PaCO2 >45 mmHg from CO2 retention. Here, pH is 7.48 and PaCO2 is 28 mmHg, showing CO2 loss, not retention. Hypoxemia (PaO2 55 mmHg) is present, but the pattern is alkalotic.
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