Results of a double blind study of three contrast media and technic for lumbosacral radiculography.

The rate of side effects, the results of EMG, EEG and CSF changes after radiculography, the rates of late leptomeningeal changes and the details of the hyperosmolality following the ionic contrast media are recorded and discussed. In conclusion rules are presented for the choice of contrast medium and the examination technic for radiculography.