Final answer:
The most appropriate step in the management of this patient is to perform a chest radiograph.
Step-by-step explanation:
The most appropriate step in the management of this patient is to perform a Chest radiograph (B).
Given the patient's symptoms of abdominal pain and tenderness near the surgical incision, it is important to rule out potential complications such as pneumonia or atelectasis. A chest radiograph can help identify any abnormalities in the lungs that may be causing the patient's symptoms.
Performing an arterial blood gas (A) would not be necessary in this case, as the patient's oxygen saturation is already at 95%. A computed tomography pulmonary angiogram (CTPA) (C) would be indicated if the patient had symptoms suggestive of a pulmonary embolism, such as sudden onset shortness of breath or chest pain. Giving intravenous (IV) morphine (D) or nebulized albuterol (E) would not address the underlying cause of the patient's symptoms.
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