الفهرس 
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Abstract
Poorly controlled acute pain after abdominal surgery is related to somatic pain signals derived from the abdominal wall and is associated with a variety of unwanted post-operative consequences, including patient suffering, distress, respiratory complications, delirium, myocardial ischemia and prolonged hospital stay.
The aim of this study was to assess the postoperative analgesic efficacy of TAP block compared to IIN+IHN nerves block after unilateral inguinal hernia repair regarding the pain relief, effect on hemodynamics, requirement of first supplemental doses of analgesia and total number of doses received.
The study was conducted on 100 randomly chosen patients aged 21 to 60 years, American Society of Anesthesiologists (ASA) class I or II scheduled for elective unilateral open inguinal hernia repair under general anesthesia, in Ain Shams University Hospitals after approval of the medical ethical committee. They were allocated in two groups.
TAP block Group: received general anesthesia and 20 ml of 0.25% levobupivacaine, by midaxillary approach, under ultrasound guidance, the probe will be placed transversely between the iliac crest and costal margin.
Ilioinguinal/ iliohypogastric nerves block group: received general anesthesia, with 20 ml of 0.25% levobupivacaine. The inferior portion of linear ultrasound transducer will be placed over the anterior superior iliac spine with the superior margin of the transducer pointed directly in an oblique plane toward the umbilicus. The superior margin of the ultrasound transducer will be slowly rotated superiorly and inferiorly until the fascial plane between the internal oblique and transverse abdominis muscle is identified.
The two groups were adequately monitored and assessed intra- and post-operatively and they were compared regarding analgesic outcome by using visual analogue scaling system, besides, recording time for first for analgesic need and total consumption of analgesics in the 1st 24 postoperative hours. Demographic data and post operative hemodynamics were also assessed.
The results of the study revealed that patients received IIN+IHN block had significantly lower pain scores at 12hrs and 24 hrs after operation, delayed time for rescue analgesia and decreased total need of analgesic in the first 24hrs post-operative compared to patients who received TAP nerves block