Upper Respiratory Tract Infections in the Critically I11

A review of severe upper respiratory tract infections that present in the critically ill (supraglottitis [epi glottitis], deep neck infections, and sinusitis) is pre sented with attention to pathogenesis, pathophysiology, diagnosis, differential diagnosis, and treatment. Supra glottitis is increasingly diagnosed in adults and, as with children, early recognition is crucial to limit mortality. To aid in diagnosis and treatment, a management al gorithm is used. Deep cervical infections, usually exten sions of upper airway infections, can spread along fascial planes with fatal results. Knowledge of the interconnec tions between anatomical spaces is a prerequisite to diagnosis and treatment. Sinusitis will present in the critically ill as orbital or intracranial complications or as a nosocomial infection. Discussions of acute and chronic community-acquired sinusitis in general, noso comial sinusitis, and sphenoid sinusitis as a separate en tity highlight differences in clinical presentation and bacteriology that are important to diagnosis and treat ment.