Needle Placement for Myelography

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Abstract

Proper placement of the entire bevel of the spinal needle within the subarachnoid space at myelography is necessary to prevent partial extra-arachnoid deposition of the contrast medium. A Cuatico aspiration cannula passed through the spinal needle at the time of spinal puncture serves to indicate the depth of the needle tip within the subarachnoid space.

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