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Medical Causes of Pneumomediastinum in Children

Pediatric Emergency Medicine, Children's Hospital Medical Center of Akron, Akron, Ohio

Peter S. Dayan, MD

Pediatric Emergency Medicine, New York-Presbyterian Hospital, Columbia Presbyterian Center, New York

The purpose of this study was to determine the possible causes, clinical findings, and associated complications of pneumomediastinum in children. Medical records fromJanuary 1985 to December 1994 were retrospectively reviewed at Children's Hospital Medical Center of Akron using International Classification of Diseases, ninth revision, codes to identify cases of pneumomediastinum. The medical causes, nontraumatic and noniatrogenic, of pneumomediastinum were studied; intubated or trauma patients and patients having undergone procedures were excluded. Neonates were also excluded. Twenty-nine cases of pneumomediastinum were identified. Two patients (7%) had recurrent pneumomediastinum. Only the first episode of pneumomediastinum was included in the data analysis. Twenty males (69%) and nine females (31%) were affected. The most common medical causes of pneumomediastinum were asthma exacerbations (17/59%) and infections (8/28%). Over the 10-year period, the prevalence of pneumomediastinum in children with asthma exacerbations was 0.2% (21/10,472); 1% (1/126) in children with airway foreign bodies and 0.2% (1/351) in children with esophageal foreign bodies. The most common signs and symptoms were subcutaneous emphysema (22/76%), sore throat or neck pain (11/38%), and Hamman's crunch (3/10%). The most common complication was pneumothorax with small pneumothoraces in 2 patients (7%) and a tension pneumothorax in 1 asthmatic with recurrent pneumomediastinum. Patients without sore throat or neck pain and patients admitted to the intensive care unit had greater hospital lengths of stay. Pneumomediastinum appears to be uncommon in children. The most common medical causes were asthma and infections. The most common signs and symptoms were subcutaneous emphysema, sore throat or neck pain, and Hamman's crunch. The most common complication was pneumothorax. The clinical significance of pneumomediastinum is its cause and association with significant complications.

Clinical Pediatrics, Vol. 40, No. 2, 87-91 (2001)
DOI: 10.1177/000992280104000204


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