What is the definition or description of: mediastinitis?

Two things: Mediastinitis can refer to 2 things. After heart surgery if an infection develops in the chest incision site which progresses deep to the bone and into the area below the bone we call this mediastinitis. This is a terrible complication but fortunately happens very rarely. Mediastinitis can also refer to chronic inflammation in the mediastinum (the area in the chest between the lungs.

Infection mediastin: Infection in the mediastinum. When caused by perforated oesophagus usually fatal ifoesophagus not repaired and space drained and IV antibiotics within few hours. Tracheal perforations ANS sternotomy infections may spread to the mediastinum as well.

Inflammation : Mediastinitis means inflammation in the middle of the chest (the mediastinum). It is most frequently used to refer to an infection in that space. Common causes include an infection after heart surgery, an injury to the esophagus (swallowing tube), or a descending infection from a very very severe dental/mouth/neck infection.