PENG Block in Comparison With Anesthetic Infiltration (PAI) After Hip Hemiarthroplasty

The ultra sound transducer will be placed in a transverse orientation, medial and caudal to the anterosuperior iliac spine in order to identify the anteroinferior iliac spine, the iliopubic eminence and the psoas tendon. Using an in-plane technique and a lateral-to-medial direction, the block needle will be advanced until its tip will be positioned on the periosteum dorsal to the psoas tendon. The LA (20mL of bupivacaine 0.5%) will be injected following negative aspiration.. The accurate position of the needle was confirmed by hydro dissection and spread under the illo-psoas muscle

LA infiltration will be carried out using a total dose of 150mg of bupivacaine and a total volume of 60mL. The admixture (consisting of 60mL of bupivacaine 0.25% and 30mg of ketorolac) will be loaded into two 30mL syringes at the beginning of surgery. After insertion of the acetabular component (and before insertion of the femoral stem), the surgeon will infiltrate the deep tissues (ie, anterior and posterior capsules, gluteus minimus and medius muscles, supraacetabular region, area around the anterior inferior iliac spine, and quadratus femoris muscle all the while avoiding the deep hip external rotator muscle group in order to prevent sciatic nerve block) with the first 30mL syringe. Before wound closure, the gluteus maximus muscle, iliotibial band, subcutaneous tissues, and skin will be infiltrated with the second 30mL syringe.