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      "author": "cheetah",
      "body": "Hi! I am a robot. I just upvoted you! I found similar content that readers might be interested in:\nhttps://issuu.com/americancollegeofphysicians/docs/mk17_b_pm_samplepages",
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      "body": "Answer is C, treat thermal upper airway injury with endotracheal intubation in this patient.\n\nIn patients with significant smoke inhalation, a visibly damaged airway and stridor are indicators of a high risk for complete upper airway obstruction due to swelling; such patients require immediate endotracheal intubation.\n\nThe most appropriate next step in treating this patient's respiratory findings is to perform endotracheal intubation. This patient sustained significant thermal injury to his upper airway as evidenced by an edematous oropharynx and monophonic wheeze consistent with inspiratory stridor. Intense heat can cause edema and blistering from the mouth to the larynx, and patients with a visibly damaged airway or stridor are at high risk of complete upper airway obstruction due to swelling. It is difficult to predict which patients with acute inhalational injury will develop complete upper airway obstruction, and even patients with minimally apparent inhalational airway injury may develop worsening obstruction associated with intravenous hydration or analgesia needed for burn treatment. Therefore, ensuring upper airway patency is the first priority in patients with significant smoke exposure, and endotracheal intubation is indicated in this patient at high risk of obstruction.\n\nBecause helium is less dense than nitrogen, a mixture of helium and oxygen (heliox) may be used in situations in which there is increased airway resistance. The combination of helium and oxygen improves laminar airflow and may decrease the work of breathing in patients with increased airway resistance. However, it would not treat the underlying inhalation-associated airway obstruction.\n\nMethylprednisolone is useful for COPD exacerbations, but systemic glucocorticoids do not have a role in treating upper airway edema or smoke-induced injury of the lower airways.\n\nNebulized epinephrine can transiently reduce upper airway edema from allergic or anaphylactic reactions, but it does not have a role in the treatment of inhalational injury.\n\nThis patient's expiratory wheezes and acute respiratory acidosis suggest the presence of a COPD exacerbation triggered by smoke inhalation, in which case noninvasive ventilation would be appropriate. However, noninvasive ventilation will not prevent this patient from developing complete airway obstruction, and securing the airway with an endotracheal tube while it is still possible takes precedence.\n\nReference\n\nRex S. Burn injuries. Curr Opin Crit Care. 2012 Dec;18(6):671-6. PMID: 23037877",
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      "body": "A 57 year old caucasian man is brought to the emergency department after being rescued from his burning home by firefighters. His medical history includes only COPD, and his only medication is an albuterol-ipratropium metered-dose inhaler.\n\nOn exam, he is alert and in moderate pain. His temperature is 37.6 °C, blood pressure is 128/66 mm Hg, pulse rate is 109 beats per minute, and respiration rate is 20 breathes per minute; BMI is 30. Oxygen saturation is 98% while breathing 2 L/min oxygen by nasal cannula. There is snoot in his nares and throughout the oral pharynx. The oral mucosa is edematous. Burns are noted on the right upper extremity and lower chest. Cardiac examination reveals a regular rhythm. Pulmonary examination reveals a monophonic wheeze over the anterior chest, diffuse expiratory wheezes, and increased work of breathing.\n\nArterial blood gas studies breathing 30% oxygen reveal a pH of 7.32, a PCO2 of 50 mm Hg, and a PO2 of 78 mm Hg.\n\nA chest radiograph shows increased lung volumes consistent with hyperinflation but no infiltrates.\n\n![](https://steemitimages.com/DQmQV3UWbtoQcg5NzkP4rqjMBjgY7tMk59SLmi1aZAhnbrj/image.png)\n\nWhich of the following is the most appropriate next step in treating this patient's respiratory findings?\n\nA.\tAdminister a helium-oxygen mixture\n\nB.\tAdminister methylprednisolone\n\nC.\tPerform endotracheal intubation\n\nD.\tStart nebulized epinephrine\n\nE.\tStart noninvasive ventilation",
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