Author(s): Y. Govardhani1 , B. Sudhakar2 , Ussa Varaprasad3 , N. Ranjith Kumar4
Regional anesthesia using paravertebral block has been suggested as an ideal adjunct to general anesthesia for thoracic [1,2] and abdominal surgeries. Than multiple injections, one-time technique has several advantages and there are minimal technical problems with infusions or catheters. For a select group of patients with serious co-morbidities, paravertebral block may be used as a sole anesthesia technique, obviating general anesthesia. Thoracic paravertebral block appears promising due to reduction in postoperative pain, postoperative nausea and vomiting, decreased opioid consumption, drowsiness, risk of respiratory depression and cost saving.[5,6] Additional advantages reported include decrease in incidence of chronic postsurgical pain and improvement in subcutaneous oxygenation in the wound site with a possible reducing infection risk and improved wound healing. With the addition of clonidine to the local anesthetic, a longer sensory nerve block has been observed.  Various additives has been used by chronic pain specialists to prolong painrelieving blocks. [9,10] The main objective of the study is to compare the duration and efficacy of postoperative analgesia and hemodynamic stability of equal doses of Bupivacaine with Dexamethasone and Bupivacaine with Clonidine through single space paravertebral block in the thoracic and abdominal surgeries.