The effect of adding Dexamethasone to Bupivacaine in ilioinguinal and iliohypogastric nerves block on pain after inguinal hernia surgery with spinal anesthesia

The aim of this study is the effect of adding Dexamethasone to Bupivacaine in ilioinguinal and iliohypogastric nerves block on pain after inguinal hernia surgery with spinal anesthesia. Study is a randomized interventional study on 44 patients aged from 20 to 80 years old who candidate for elective unilateral inguinal hernia surgery with American Society of Anesthesia (ASA) class І and II. Individuals with history of opioid addiction, analgesic consumption, surgery time more than 1 hour and half being spinal anesthesia off during surgery will be excluded. Patients will be randomly divided into two groups (n=22) on the basis of selection of colored cards. All patients will be underwent spinal anesthesia with similar method. At the end of surgery, all patients will be underwent ilioinguinal and iliohypogastric block with direct injection of medicine around nerves tissues.Patients in control group will be received 2 cc Bupivacaine 0.5% plus 1 cc normal saline and in case group, 2 cc Bupivacaine 0.5% plus 1 cc (4 mg) Dexamethasone. Surgeon and anesthesiology resident will do not inform about kinds of drugs. The postoperative pain will be recorded at1, 2, 4, 12 and 24 hours after surgery on the basis of visual analog scale. Analgesia requirements and first time of feeling pain after surgery will be recorded. Additional analgesics (intravenous pethidine 50 mg or Diclofenac suppository 100 mg) will be administered to the patients based on visual analog scale in the postoperative period.

Vice Chancellor for research Qazvin University of Medical Sciences