Background
hernia
ADVERSE EFFECTS
Surgical repair of inguinal hernia is one of the most common day case surgeries in the pediatric population [Caudal analgesia in lower abdominal surgeries has become unpopular among physicians because of its short duration of analgesia, (4–6) h, and its potential adverse effects including motor block, urine retention and the accidental dural puncture. Currently, fascial blocks are widely used for postoperative analgesia in patients scheduled for lower abdominal surgeries. Transversus abdominis plane block [In 2009, Hebbard described ultrasound-guided TFB that targets the T12 and L1 spinal nerves [The ultrasound-guided QLB was first described by Blanco 2007 in which the local anesthetic is injected in the space between abdominal wall muscles and the lateral margin of the quadratus lumborum muscle [The ultrasound-guided QLB provides effective postoperative analgesia following abdominal surgeries, such as pediatric lower abdominal surgeries [In this study, we compared the postoperative analgesic effects of TFB versus QLB in children scheduled for open unilateral inguinal herniotomy using the proportion of patients who required rescue analgesia as a primary outcome. We hypothesized that the postoperative analgesia provided by TFB would be non-inferior to QLB.