Introduction: Spinal anaesthesia (or spinal anesthesia), also called spinal block, subarachnoid block, intradural block and intrathecal block is a form of neuraxial regional anaesthesia involving the injection of a local anaesthetic or opioid into the subarachnoid space, generally through a fine needle, usually 9 cm (3.5 in) long. Epidural anesthesia is a technique that may be used as a primary surgical anesthetic or as a resource for postoperative pain management. It is safe and relatively easy to learn and perform.A hernia is reducible if it occurs intermittently (such as on straining or standing) and can be pushed back into the.