Adjuvants With Intrathecal Bupivacaine for Postoperative Analgesia

Under strict aseptic conditions, a lumbar puncture will be performed with selective technique in sitting position at L2-3 or L3-4 interspaces with midline approach using a 25-G Quincke's needle. After achieving the free flow of cerebrospinal fluid, the study drug will be injected into the subarachnoid space, immediately after injection the patient will be asked for supine position.

1 mg midazolam intrathecal administration

20 mg bupivacaine intrathecal administration