الفهرس 
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Abstract
Introduction: The blockade of ilioinguinal/iliohypogastric nerves in the anterior abdominal wall has improved postoperative analgesia after open inguinal hernia repair and many other procedures. The transversus abdominis plane block (TAP) is the approach for blocking the anterior branches of the spinal nerves innervating anterior abdominal wall providing effective analgesia via the lumbar triangle of Petit. TAP block aims to precipitate local anesthetics targeting the spinal nerves within the plane between the internal oblique and transversus abdominis muscles. Both ilioinguinal/iliohypogastric nerves and TAP blocks provide perioperative analgesia in inguinal hernia surgeries. But, using ultrasound guidance made the perioperative analgesia better than that of anatomically guided technique after open inguinal hernia repair.
The aim of this study: is to compare compare ultrasound guided ilioinguinal/iliohypogastric nerve block with ultrasound guided transversus abdominis plane block for postoperative analgesia after unilateral open inguinal hernia repair performed under spinal anesthesia.
Patients and method: The present study was conducted on 80 adult patients aged 21 to 60 years, American Society of Anesthesiologists (ASA) class I or II scheduled for elective primary unilateral open inguinal hernia repair at MUH. Patients were arranged into 2 groups (40 patients in each group): Ilioinguinal/iliohypogastric nerve block group (IIH group) and Transversus abdominis plane block group (TAP).
Results: The present study revealed that patient demographic data (age, sex, and BMI) was matched between the 2 groups, patient hemodynamics (MAP, HR) at different intervals showed no statistical difference between the studied groups, patient satisifaction and postoperative complications showed no statistically significant difference between the 2 groups but numerical pain scores at rest and movement were statistically significant decreased in TAP group than IIH group, patients receiving transversus abdominis plane block (TAP) reported longer time till first request of analgesia, decreased total consumption of analgesics compared to patients receiving ilioinguinal/iliohypogastric nerve block..
Conclusion: ultrasound guided TAP block was superior in pain control than ultrasound guided IIH block following open unilateral inguinal hernia repair under spinal anesthesia.