Regional anesthesia and peripheral nerve blocks are now used widely in children mostly in combination with general anesthesia they provide part of anesthetic requirement and significantly improve patient comfort in postoperative period. The need exists for a long acting local anesthetic that enjoys the benefits of bupivacaine but with lower potential for toxicity. Levobupivacaine (chirocaine) a new local anesthetic which is the S (-) isomer of bupivacaine is provided by Ben Venue laboratories the evidence from animal and human volunteers studies demonstrated that levobupivacaine is consistently less toxic than bupivacaine. The study aims to evaluate the value of “3-in-1” continuous lumbar plexus block in children in intra and postoperative pain management and intraoperative anesthetic consumption comparing a new local anesthetic levobup- ivacaine to ropivacaine for performance of the block. The continuous "3-in-1" lumbar plexus block is used to relief pain in knee, hip, surgeries, relief tourniquet pain and during transportation and x-ray of fracture femur in both adults and children. For this reason catheter should be advanced as proximal (near L3 and L4) as possible . This blocks femoral, obturator, and the lateral femoral cutaneous nerve of thigh.