Abstract: The present invention provides a puncture needle set for combined spinal-epidural anesthesia comprising an epidural needle with a small guiding conduit on the pin and a groove on the outer wall and a spinal needle with a beaked tip. During anesthesia, first the epidural needle is punctured into the epidural space, then the epidural catheter is placed, afterwards the spinal needle is guided to enter into the groove on the needle peduncle by the small conduit on the pin of the epidural needle and slide into the epidural space, then let it go ahead deep into subarachnoid space. After medicine is injected, the spinal needle and the epidural needle are withdrawn in turn, at the same time the epidural catheter is left back.

Abstract: A rail-guided epidural-spinal needle, which includes an epidural needle including a base and a needle shaft connected to the base, the needle shaft having a groove that is formed on an outer surface of the needle shaft and extends along an axis of the needle shaft, the base having an elevated spinal needle inlet disposed thereon, the spinal needle inlet having a conduit formed therein, the conduit being of an acute angle with the groove in a side view of the epidural needle, and being in alignment with the groove in a top view of the epidural needle. The rail-guided epidural-spinal needle also includes a spinal needle having a tip with a unilaterally curved conformation down one side, such that, when the spinal needle is inserted into the conduit of the spinal needle inlet, and pushed forward, the tip thereof reaches the groove and slides along the groove.

Abstract: A rail-guided epidural-spinal needle, which includes an epidural needle including a base and a needle shaft connected to the base, the needle shaft having a groove that is formed on an outer surface of the needle shaft and extends along an axis of the needle shaft, the base having an elevated spinal needle inlet disposed thereon, the spinal needle inlet having a conduit formed therein, the conduit being of an acute angle with the groove in a side view of the epidural needle, and being in alignment with the groove in a top view of the epidural needle. The rail-guided epidural-spinal needle also includes a spinal needle having a tip with a unilaterally curved conformation down one side, such that, when the spinal needle is inserted into the conduit of the spinal needle inlet, and pushed forward, the tip thereof reaches the groove and slides along the groove.

Abstract: The present invention provides a puncture needle set for combined spinal-epidural anesthesia comprising an epidural needle with a small guiding conduit on the pin and a groove on the outer wall and a spinal needle with a beaked tip. During anesthesia, first the epidural needle is punctured into the epidural space, then the epidural catheter is placed, afterwards the spinal needle is guided to enter into the groove on the needle peduncle by the small conduit on the pin of the epidural needle and slide into the epidural space, then let it go ahead deep into subarachnoid space. After medicine is injected, the spinal needle and the epidural needle are withdrawn in turn, at the same time the epidural catheter is left back.