How is the process that becomes lumbar puncture needle?

Usually take the bending lateral decubitus position, the patient bends the neck to hold the knee, the back as close as possible to the bed surface. After routine local disinfection and anesthesia, wear rubber gloves and puncture through the L3-4 (L2-S1) cone space. The puncture needle is inserted slowly along the spinous process. If the needle tip encounters bone during the process of needle entry, the needle should be withdrawn to the subcutaneous area to correct the Angle before puncture. About 4-6cm into the needle, the dura can be penetrated to reach the subarachnoid space, the needle core is withdrawn to drain the cerebrospinal fluid, pressure measurement and retention of cerebrospinal fluid, then insert the needle core to pull out the needle. The puncture point is slightly pressurized to stop bleeding, and is fixed with gauze and tape. Supine position for 4-6 hours after operation.

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