In the emergency room,a patient with smoke inhalation injury will tend to display which of the following clinical signs?

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The clinical diagnosis of inhalation injury has traditionally rested on various unreliable observations.Smoke inhalation injury is more likely to be present in those with a history of burn injury in an enclosed space,the appearance of facial burns,singed nasal vibrissae and facial hair,erythema of the oropharynx,and the presence of carbonaceous sputum and debris around the nose,mouth,and pharynx.Rhonchi,crackles,wheezes,stridor,dyspnea,cough,and hoarse voice are seldom present on admission,occurring only in persons with the most severe injury and implying an extremely poor prognosis.The admission chest radiograph is often normal and is a poor indicator of severity of acute lung injury.However,two thirds of patients develop changes,including diffuse or focal infiltrates or pulmonary edema,within 5 to 10 days of injury.

In the Emergency Room,a Patient with Smoke Inhalation Injury Will