Control Group |
Transversus Abdominis Plane Block |
0.2 mL/kg of 0.25% bupivacaine per side, without exceeding the toxic dose 3 mg/kg |
Single Shot Injection on both sides |
Patients will be assessed preoperatively by careful history taking, full physical examination, and laboratory evaluation. On arrival of the patients to the operative room, electrocardiography, non-invasive blood pressure, and pulse oximetry will be applied. Intravenous (IV) line will be inserted and IV lactated Ringer will be started. Spinal anesthesia will be performed using spinal needle of 25-G under complete aseptic conditions (hyperbaric 0.5% bupivacaine 12 mg and fentanyl 25 µg).
At the end of surgery, Transversus Abdominis Plane Block will be performed under complete aseptic precautions using ultrasound machine with high frequency linear probe covered with sterile sheath. The probe will be located between the iliac crest and the lower costal margin in the anterior axillary line at the level of umbilicus, and the layers of abdominal wall will be identified (external oblique, internal oblique, and transverse abdominis muscles). In plane technique will be used, and the tip of the needle will be inserted between the internal oblique and transverse abdominis muscles. After negative aspiration, (0.2 mL/kg of 0.25% bupivacaine per side) will be injected without exceeding the toxic dose 3 mg/kg. The same technique will be performed on the other side.
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20 |
Active-Treatment of Control Group |
Experimental Group |
Quadratus Lumborum Block |
0.2 mL/kg of 0.25% bupivacaine per side, without exceeding the toxic dose 3 mg/kg |
Single shot injection, on both sides |
Patients will be assessed preoperatively by careful history taking, full physical examination, and laboratory evaluation. On arrival of the patients to the operative room, electrocardiography, non-invasive blood pressure, and pulse oximetry will be applied. Intravenous (IV) line will be inserted and IV lactated Ringer will be started. Spinal anesthesia will be performed using spinal needle of 25-G under complete aseptic conditions (hyperbaric 0.5% bupivacaine 12 mg and fentanyl 25 µg).
At the end of surgery, Quadratus Lumborum Block will be performed under complete aseptic precautions using ultrasound machine with high frequency linear probe covered with sterile sheath. The probe will be placed at the level of the anterior superior iliac spine and will be moved cranially until the three abdominal wall muscles will be clearly identified. The external oblique muscle will be followed postero-laterally until its posterior border will be visualized, leaving underneath the internal oblique muscle, like a roof over the QL muscle. The probe will be tilted down to identify a bright hyperechoic line that represents the middle layer of the thoracolumbar fascia. The needle will be inserted in plane from anterolateral to posteromedial. The needle tip will be placed between the thoracolumbar fascia and the QL muscle, and after negative aspiration, the correct position of the needle will be proved by injection of 5 mL of normal saline to confirm the space with a hypoechoic image and hydrodissection. An injection of (0.2 mL/kg of 0.25% bupivacaine per side) will be applied without exceeding the toxic dose 3 mg/kg, and the same technique will be performed on the other side. |
20 |
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