Paravertebral block versus thoracic epidural for patients undergoing thoracotomy

To compare the two regional techniques of thoracic epidural blockade (TEB) and paravertebral block (PVB) in adults undergoing elective thoracotomy with respect to:

  1. analgesic efficacy;      
  2. the incidence of major complications (including mortality);       
  3. the incidence of minor complications;    
  4. length of hospital stay;
  5. cost effectiveness.

This is a protocol.