Close the IV bag clamp and fill the bag with about 200 cc of water. Hang the bag about 16" from the table surface. (Hanging height and water volume will determine the fluid pressure within the spinal canal and can be adjusted as desired.) Connect the luer barb and stop- cock to the other end of the tubing. Set up a towel or container sufficient to absorb or collect a small amount of water from the stopcock. (See figure 6.)Open the clamp and the stopcock. Allow water to flow until the air is displaced. Close the stopcock only — leave the clamp open.
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