A teenage patient comes to the emergency department complaining of an inability to "breathe and a sharp pain in my left chest." Assessment findings include cyanosis,tachypnea,tracheal deviation to the right,decreased tactile fremitus on the left,hyperresonance on the left,and decreased breath sounds on the left.This description is consistent with:

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With a pneumothorax,free air in the pleural space causes partial or complete lung collapse.If the pneumothorax is large,tachypnea and cyanosis are also present,as are unequal chest expansion,decreased or absent tactile fremitus,tracheal deviation to the unaffected side,decreased chest expansion,hyperresonant percussion tones,and decreased or absent breath sounds.

A Teenage Patient Comes to the Emergency Department Complaining of an Inability