Lumbar Erector Spinae Plane Block and Quadratus Lumborum Block in Hip and Proximal Femur Surgeries

Lumbar ESP block will be performed at the begining of surgery under ganeral anesthesia. A convex ultrasound transducer will be placed in a longitudinal parasagittal orientation 4-6 cm lateral to L4 spinous process. The erector spinae muscles will be identified superficial to the tip of L4 transverse process. The patient's skin will be anesthetized with 2% lidocaine. A 22-gauge 10-cm needle will be inserted using an out-plane superior-to-inferior approach to place the tip into the fascial plane on the deep (anterior) aspect of erector spinae muscle. The location of the needle tip will be confirmed by visible fluid spread lifting erector spinae muscle off the bony shadow of the transverse process. A total of 40 mL of bupivacaine/lidocaine mixture will be injected.

QLB block will be performed at the begining of surgery under ganeral anesthesia. The convex transducer will be placed in the transverse plane on the flank of the patient cranial to the iliac crest.The 4th lumbar vertebral transverse process, erector spinae muscles, psoas muscles, transverse abdominis muscles, internal and external oblique muscles and the quadratus lumborum muscles will be identified. A 15cm 22G insulated needle will be inserted on the posterior corner of the convex probe. 40 ml of local anesthetic mixture(bupivacaine and lidocaine ) will be administered between the quadratus lumborum and psoas muscles into the fascial plane. We observed the local anesthetic pressing down on the psoas muscle in the ultrasound image.