Both ilioinguinal nerve damage and entrapment during an inguinal hernia repair can lead to Post-Herniorraphy Pain Syndrome or inguinodynia , which is chronic pain in the groin region lasting for greater than 3 months following inguinal hernia repair surgery, otherwise known as a herniorraphy. This can be treated with analgesia or physical therapy but these have been shown to have little effect. Ilioinguinal nerve block has been shown to be effective in reducing groin pain following herniorraphy. Nerve blocks can temporarily and reversibly block nerve transmission, leading to pain relief.
TAP block targets the branches of the T7-L1 spinal nerves within the lateral abdominal wall and is used in abdominal procedures such as inguinal hernia repair and total abdominal hysterectomy. 2 IHINB blocks the ilioinguinal and iliohypogastric nerves, which arise from the T12-L1 spinal nerves, and is most commonly used in inguinal herniorrhaphy, as well as in cesarean section and orchiopexy . 3 However, because IHINB is a truncal nerve block, it requires a smaller volume of anesthetic than TAP block, which is a field nerve block. 1