What is the procedure for a lumbar puncture?

Usually, the patient is in a stooped lateral position, with the patient flexing the neck and tucking the knees, with the back as close to the bed as possible. After routine local disinfection and anesthesia, wear rubber gloves and perform puncture from the L3-4 (L2-S1) cone space. The puncture needle is inserted slowly in the direction of the spinous process. If the needle tip encounters bone during the needle insertion process, the needle should be withdrawn to the subcutaneous surface and the angle should be corrected before puncturing. The needle is inserted about 4-6cm, and the dura mater can be penetrated to reach the subarachnoid space. The core of the needle is drawn out to flow out the cerebrospinal fluid. Slight pressure on the puncture point to stop bleeding, apply gauze and tape to fix it? Lie down for 4-6 hours after surgery.

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