Methods and advantages of combined subarachnoid anesthesia needle with epidural anesthesia?

Even hard external is to puncture the ligamentum flavum with a puncture needle to reach the epidural space, and inject local anesthetics into the epidural space to block the nerve roots. In theory, it can be hit from the cervical spine to the sacral spine, but it is rarely seen now Someone hit the cervical spine. Spinal-epidural union is a combination of spinal anesthesia (that is, subarachnoid anesthesia) and epidural anesthesia. The gap of spinal anesthesia is generally L2, 3 or L3, 4 can not be high, otherwise it will be general spinal anesthesia, because spinal anesthesia is the injection of drugs directly into the subarachnoid space, which blocks the spinal cord, and the height of the plane leads to central anesthesia It is quite dangerous, and because of this, spinal anesthesia is much less than epidural. During spinal-epidural union, the drug is injected into the subarachnoid space through a spinal needle, then the spinal needle is pulled out, and then a very thin tube is inserted into the epidural space through the epidural needle. It can continue to be administered to the epidural space to assist the anesthesia effect of spinal anesthesia.

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