Analgesic Efficacy of Ultrasound Guided Bilateral Erector Spinae Plane Block in Pediatric.

"An ultrasound transducer will be placed in a longitudinal orientation 3 cm lateral to the T3 spinous process corresponding to the T2 transverse process.~Three muscles; trapezius , rhomboids major , and erector spinae will be identified superior to the hyperechoic transverse process.~Using in-plane approach a 25 G needle will be inserted in caudal-cephalad direction, until the tip is deep to erector spinae muscle.~Correct needle tip location will be confirmed by injecting 3 mL of saline and visualizing the linear LA spread in the fascial plane between the erector spinae muscle and the transverse process..~0.4 ml/kg (1:1 solution of bupivacaine 0.25% and lidocaine 1%) will be injected and visualizing the linear LA spread in the fascial plane between the erector spinae muscle andthe transverse process12."