I | Mediastinitis presenting within 2 weeks after operation in the absence of risk factors |
II | Mediastinitis in 2 – 6 weeks after operation in the absence of risk factors |
- A: Med type I in presence of one or more risk factors | |
- B: Med type II in presence of one or more risk factors | |
IV | - A: Med type I, II, or III after one failed therapeutic trial |
- B: Med type I, II, or III after more than one failed trial | |
V | Mediastinitis presenting for the first time more than 6 weeks after operation |