Effect of Bupivacaine Local Anesthesia on Pain after Surgical Incision of Inguinal Hernia

Postoperative pain control is the most challenging problem in surgeries. One of the reducing pain methods related to abdominal surgery is blocking nerve root of that region. The aim of this study was to determine the effect of preoperative local anesthesia on pain of inguinal hernia incision.

This double-blind clinical trial was done on 80 patients that classified into four blocks and then divided in two groups including Bupivacaine and placebo. For Bupivacaine group 0. 5 Mg/kg Bupivacaine added to 5 ml normal saline and injected subcutaneously in the region، for the placebo group only 5 cc of normal saline was injected. Between 0 and 24 hours after surgery pain in both groups using VAS technique was measured. By SPSS. 15 data were analyzed using frequency، Mean، SD and also Chi-squares t-test and Fisher exact test. The α for all tests considered as 0. 05.

The mean of pain intensity after surgery in Bupivacaine group was 5. 47±0. 94 and in the placebo group was 7. 33±0. 8 (P<0. 0001). The mean of pain intensity 24 hours after surgery in Bupivacaine group was 2. 87±0. 77 and in the placebo group was 5. 13±0. 93 (P<0. 0001). Pain intensity comparison in right and left hernia in two measuring times was not different (P> 0. 05). Discussion &

Local injection of Bupivacaine 0. 5 Mg/kg before inguinal hernia surgery could be reducing the pain and also taking painkillers، so using this technique in inguinal hernia surgery is recommended.