The difference between epidural anesthesia needle and combined spinal-epidural anesthesia

Even epidural is to penetrate the puncture needle through the ligamentum flavum to the epidural space, and inject local anesthetic into the epidural space to block the nerve root. In theory, it can be hit from the cervical spine to the sacral spine, but it is rarely seen now There is a neck hit. A combined spinal-epidural anesthesia is a combination of spinal anesthesia (also known as subarachnoid anesthesia) and epidural anesthesia. The gap of spinal anesthesia is generally L2,3 or L3,4 can not be higher, otherwise it will be general spinal anesthesia, because spinal anesthesia is to inject drugs directly into the subarachnoid space, the spinal cord is blocked, and the plane is too high to cause central anesthesia It is quite dangerous, and because of this, the dosage of spinal anesthesia is much less than that of epidural. In the case of combined spinal-epidural combination, the drug is first injected into the subarachnoid space through a spinal anesthesia needle, and then the spinal anesthesia needle is pulled out, and then a very thin tube is inserted into the epidural space through the epidural puncture needle, so that the It can be continuously administered to the epidural space to assist the anesthetic effect of spinal anesthesia.

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