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Related to mediastinal space: mediastinal septum
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Based on our experience, we conclude that (1) cervicotomy alone is sufficient for drainage in cases of cervical phlegmon or mediastinal involvement that are limited to a single superior mediastinal space and (2) thoracotomy and drainage of mediastinal collections is necessary when mediastinal sepsis is more extensive.
A more dangerous situation results when air under positive pressure stays trapped in the mediastinal space, where it may compress the heart and great vessels.