Mediastinoscopy is an invasive form of mediastinal diagnosis and staging. It requires general anaesthetic and has higher risks than most staging procedures.

1. •FBP - within last month unless intervening illness
   

2. •U&E - within last month unless intervening illness
   

3. •CXR - should be within last 24 hours
   

4. •ECG - within last month (unless < 40 years)
   

5. •CT scan it is imperative that the CT be in theatre during mediastinoscopy
   

Note: The patient must be able to lie absolutely flat for 30 minutes without developing dyspnoea, discomfort or discolouration. In patients with SVC obstruction, mediastinoscopy is usually contraindicated.