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.

pneu·mo·me·di·as·ti·num

(nū'mō-mē'dē-ă-stī'nŭm), Abnormal presence of air in mediastinal tissues; multiple causes include pulmonary interstitial emphysema, ruptured bleb, perforation of the cervical or thoracic esophagus or airways, cervicomediastinal infection, and perforated abdominal viscus. Synonym(s): mediastinal emphysema [G. pneuma, air, + mediastinum]

mediastinal emphysema

The presence of air in mediastinal soft tissues.
Clinical findings
Severe chest pain, dyspnoea, Hamman sign.
Aetiology
• Respiratory tract—trauma to lungs, perforation of upper airways, asthma, Mycoplasma pneumoniae pneumonia.
• GI tract—rupture of oesophagus, bowel.
• Other (e.g., obesity).

Management
Usually conservative, as emphysema slowly resolves on its own; in the face of lung collapse, the patient must lie on the side of the collapsed lung.

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.

pneu·mo·me·di·as·ti·num

(nū'mō-mē'dē-ă-stī'nŭm) Escape of air into mediastinal tissues, usually from interstitial emphysema or from a ruptured pulmonary bleb. [G. pneuma, air, + mediastinum]

单词	pneumomediastinum
释义	pneumomediastinum Translations pneumomediastinum 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. pneu·mo·me·di·as·ti·num (nū'mō-mē'dē-ă-stī'nŭm), Abnormal presence of air in mediastinal tissues; multiple causes include pulmonary interstitial emphysema, ruptured bleb, perforation of the cervical or thoracic esophagus or airways, cervicomediastinal infection, and perforated abdominal viscus. Synonym(s): mediastinal emphysema [G. pneuma, air, + mediastinum] mediastinal emphysema The presence of air in mediastinal soft tissues. Clinical findings Severe chest pain, dyspnoea, Hamman sign. Aetiology • Respiratory tract—trauma to lungs, perforation of upper airways, asthma, Mycoplasma pneumoniae pneumonia. • GI tract—rupture of oesophagus, bowel. • Other (e.g., obesity). Management Usually conservative, as emphysema slowly resolves on its own; in the face of lung collapse, the patient must lie on the side of the collapsed lung. 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. pneu·mo·me·di·as·ti·num (nū'mō-mē'dē-ă-stī'nŭm) Escape of air into mediastinal tissues, usually from interstitial emphysema or from a ruptured pulmonary bleb. [G. pneuma, air, + mediastinum]
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