How is a lumbar puncture different from an epidural procedure?

First of all, subarachnoid puncture mainly refers to an invasive examination operation, which is clinically used to extract cerebrospinal fluid for related examinations, but local anesthetics can also be injected through subarachnoid puncture for anesthesia (that is, "" subarachnoid block" or "spinal anesthesia").

Maybe many people don't understand that subarachnoid block and epidural anesthesia are all injected on the back? Is there any difference between the two?

In fact, these two types of anesthesia are collectively referred to as intraspinal anesthesia. The epidural space is between the ligamentum flavum and the dura mater, and placing the anesthetics here is called epidural anesthesia. There is a potential anatomical space between the dura mater and the arachnoid, which is generally indistinguishable clinically. There is a space between the arachnoid and the spinal cord called the subarachnoid space. Therefore, one of the differences between the two anesthesia methods is the difference in the level of drug injection between the two.

More importantly, the duration of anesthesia, location, and dosage of the two are also different. Subarachnoid block anesthesia time is short, the safe anesthesia site is low (usually only used for abdominal and lower surgical anesthesia), and the dosage is relatively small (complications are mainly headache caused by low intracranial pressure, but in recent years Improvements in equipment have reduced such risks); while epidural anesthesia can support longer procedures, and can even be used for postoperative analgesia, with a high level of safe anesthesia site (it was even used in neck surgery in the early days) anesthesia), but with high doses (and high technical requirements for the practitioner, which may lead to the risk of complications of general spinal anesthesia).

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