Advantages And Advantages Of Hard Combined Anesthesia Needle:

Rapid onset of effect; The effect is exact; The duration of anesthesia is not limited; Local anesthetic dosage is small; The incidence of local anesthetic poisoning is low; Postoperative epidural analgesia; True lumbar hemp "no contact" technique.

The disadvantages of combined lumbar and epidural anesthesia are:

(1) Surgical scope was limited to the lower body (limited by the highest safe puncture site);

(2) Because of the superposition of the two anesthesia methods, the interference to the patient will increase, so the drug use should be more careful;

(3) There may be "complications" after the application of both anesthesia methods;

(4) The effect and scope of anesthesia will not always maintain the same state at the beginning (will be more like epidural anesthesia).

(5) The block range of CSEA is wider than that of general lumbar anesthesia or epidural block, and the reasons are as follows:

(1) Epidural local anesthetics penetrate the subarachnoid space through the damaged dura.

(2) The epidural pressure changes and the negative pressure disappears, which promotes the diffusion of local anesthetics in cerebrospinal fluid.

(3) Injection of local anesthetic liquid into the epidural space increases the volume and compresses the dura, which increases the pressure in the lumbosacral subarachnoid space, promotes the diffusion of local anesthetic to the head, and increases the block plane by 3 ~ 4 segments;

(4) Cerebrospinal fluid spilt from the dural pinhole, which diluted the epidural anesthesia, increased the volume and increased the block level.

(5) Local anesthetics spread upward in the subarachnoid space due to changes in body position;

In order to remedy the lack of lumbar anesthesia plane, blind injection of local anesthetics through epidural catheter. Therefore, during CSEA, anesthesia management should be strengthened, local anesthetics should be applied reasonably, vital signs should be monitored closely, blood volume replenishing should be accelerated when necessary, and blood pressure boosting drugs should be applied appropriately.