What set of arterial blood gases (ABGs) would you expect to see in a client with acute chest trauma?
pH 7.53, CO2 32, HCO3 24
pH 7.30, CO2 52, HCO3 22
pH 7.49, CO2 30, HCO3 14
pH 7.26, CO2 45, HCO3 18
The Correct Answer is B
Choice A reason: pH 7.53 and low CO2 (32) indicate respiratory alkalosis from hyperventilation, not typical in chest trauma where breathing is impaired. HCO3 (24) is normal, showing no compensation yet, misaligning with trauma physiology.
Choice B reason: pH 7.30, high CO2 (52), and near-normal HCO3 (22) reflect respiratory acidosis from hypoventilation in chest trauma, like rib fractures, reducing air exchange. Compensation is minimal acutely, fitting the clinical scenario.
Choice C reason: pH 7.49 and low CO2 (30) suggest respiratory alkalosis, while low HCO3 (14) indicates metabolic compensation. This doesn’t match chest trauma’s ventilatory restriction, which elevates CO2 instead.
Choice D reason: pH 7.26, CO2 (45), and low HCO3 (18) show mixed acidosis. Chest trauma primarily causes respiratory acidosis from CO2 retention, not a significant metabolic drop acutely, making this less precise.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Donepezil treats Alzheimer’s by inhibiting cholinesterase, boosting acetylcholine for cognition. Lupus, an autoimmune disease, doesn’t involve dementia primarily, so this drug lacks relevance to its management.
Choice B reason: Prednisone, a corticosteroid, suppresses inflammation and immune response in lupus, reducing joint pain and organ damage from autoantibody activity, making it a standard treatment.
Choice C reason: Hydroxychloroquine modulates immunity and reduces lupus flares by stabilizing lysosomes and decreasing autoantibody production, directly addressing its autoimmune pathology.
Choice D reason: Methotrexate, an immunosuppressant, inhibits folate metabolism, curbing immune cell proliferation in lupus, effectively managing severe symptoms like arthritis or organ involvement.
Correct Answer is B
Explanation
Choice A reason: Bradycardia occurs in hypothyroidism; Graves’ disease, hyperthyroidism, speeds metabolism, causing tachycardia, not slowed heart rate, during exacerbation.
Choice B reason: Heat intolerance in Graves’ disease results from excess thyroid hormone accelerating metabolism, raising body temperature, a hallmark of hyperthyroidism flares.
Choice C reason: Weight gain aligns with hypothyroidism’s slowed metabolism; Graves’ causes weight loss from increased calorie burning, opposite to this finding.
Choice D reason: Lethargy reflects hypothyroidism’s energy drop; Graves’ exacerbation increases metabolism, leading to restlessness or fatigue from overactivity, not lethargy.
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