How to do waist threading needle?

The patient lies on the side of the bed, holding the knee with two hands, and protruding the lumbar spine backward as far as possible to enlarge the lumbar space. Lumbar needle threading is performed after disinfection and anesthesia. Generally, there is resistance when you Pierce 4 ~ 5cm, and the resistance suddenly decreases. Then pull out the needle core, rotate the needle tail, and the cerebrospinal fluid will be removed. Then insert the needle core, take out the puncture needle, and finally disinfect and fix the gauze.
Lumbar puncture needle sounds terrible, but the clinical lumbar puncture has been very mature, the operation is very simple, but there are still some risk factors for lumbar puncture, there may also be harm to the patient's health, the above four hazards are the most important hazards of lumbar puncture. At the same time, we should pay attention to some problems before waist wear, many cases are temporarily unable to do waist wear.