Merits of Continuous Paravertebral Block in the Management of Renal/Adrenal Surgery by Laparotomy

The paravertebral block is an alternative in the analgesia epidural the major interest of which lives in the catheterisation of the paravertébral space allowing to assure/insure an one-sided continuous analgesia. The main objective of the study is to bring to light the superiority of the continuous paravertébral block, as a supplement to analgesia, in the care of the renal and\\or adrenal surgery by laparotomy at the adult in terms of consumption of morphine, with regard to the classic analgesia classic. The main assessment criterion is the consumption of morphine within first 24 postoperative hours at the patients benefiting from a paravertébral continuous block besides the classic systematic analgesia.