pneumomediastinum /pneu·mo·me·di·as·ti·num/ (-me″de-as-ti´num) air or gas in the mediastinum, which may be pathological or introduced intentionally.
pneumomediastinum
pneumomediastinum [noo″mo-me″de-as-ti´num]
pneumomediastinum
pneu·mo·me·di·as·ti·num (n  m -m d- -st  nm)n. The escape of air into the mediastinal tissues, usually from interstitial emphysema or from a ruptured pulmonary bleb. |
pneumomediastinum
[no̅o̅′mōmē′dē·əstī′nəm]
Etymology: Gk, pneuma, air, mediastinus, midway
the presence of air or gas in the mediastinal tissues. In infants it may lead to pneumothorax or pneumopericardium, especially in those with respiratory distress syndrome or aspiration pneumonitis. In older children the condition may result from bronchitis, acute asthma, pertussis, cystic fibrosis, or bronchial rupture from cough or trauma. Also called Hamman's disease.
pneumomediastinum [noo″mo-me″de-as-ti´num]
the presence of air or gas in the mediastinum, which may interfere with respiration and circulation, and may lead to such conditions as pneumothorax or pneumopericardium. It may occur spontaneously or as a result of trauma or a pathologic process, or it may be induced deliberately as a diagnostic procedure.
pneumomediastinum
the presence of air or gas in tissues of the mediastinum, occurring pathologically or introduced intentionally.
pneumomediastinum
Mediastinal emphysema Critical care The presence of air in the mediastinum, either post-traumatic or induced during mediastinoscopy; the air may percolate into the thorax, resulting in
pneumothorax, or into the pericardium, causing pneumopericardium. See Emphysema.
pneumothorax, or into the pericardium, causing pneumopericardium. See Emphysema.
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