Posture.

Positioning.

Disinfection.

Open the puncture pack.

Lay out hole towels.

2% lidocaine, intradermal, subcutaneous, and ligament anesthesia.

Check the puncture needle.

Insert the needle.

Break through the dura mater.

Take out the needle core.

Cerebrospinal fluid leaked out.

Pressure measurement.

Collect cerebrospinal fluid.

Remove the needle.

……
Chapter completed!