Hinck V C
Radiology. 1976 Sep;120(3):731-2. doi: 10.1148/120.3.731.
Painless recovery of radiopaque substances after positive contrast myelography is often difficult, especially if the initial spinal tap is not made precisely in the midline. The author has designed a cannula for aspiration which has performed favorably in clinical tests and which will soon be available commercially.