Horizontal adjustment of epidural needle

Anesthesia plane refers to the block plane where pain disappears, indicating the range of spinal nerve block. The block plane of the sensory nerve was lower than that of the sympathetic nerve, and the block plane of the motor nerve was flat but lower than that of the sensory nerve.

After anesthesia is injected into the subarachnoid space, it usually takes only ten minutes to be fixed in the nerve tissue, and the anesthesia scope is no longer changed. Therefore, it is required to control the plane as soon as possible within the effective time of drugs in the scope of operation. Whether the plane adjustment is appropriate will affect the success or failure of anesthesia and the safety of patients. There are many factors affecting the anesthetic plane, such as puncture site, the proportion of local anesthetic, dose and volume, body position, the direction of the skew of the puncture needle, injection speed, the performance of anesthetic itself and individual differences, etc., and the adjustment of the plane should be considered comprehensively.

Indications and contraindications

It is suitable for operation of lower abdomen, lower limbs and perineum anus. The following conditions are prohibited: ① Central nervous system diseases, such as meningitis, spinal cord anterior horn gray plastitis, tuberculosis and tumors. ② Infection or sepsis at the puncture site. ③ Cardiovascular insufficiency, such as severe anemia, shock, heart failure, hypertension, coronary heart disease, etc. ④ Ascites or large tumors in the abdominal cavity. ⑤ coagulation dysfunction.

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