Multifidus Plane Block Versus Caudal Block for Hypospadias

"Using the in-plane technique,The fascial plane between the multifidus muscle and the median sacral crests of S2 and S3, will be injected by bupivacaine."

"The ultrasound transducer will first be placed transversely at the midline to obtain the transverse view of sacral hiatus. At this level, the ultrasound transducer is rotated 90 degrees to obtain the longitudinal view of sacral hiatus. The block needle is inserted using the in-plane technique."