[A new contrast medium (author's transl)].

Report about a new roentgen contrast medium which contains as salt-forming cations the physiologic alpha-amino acids L-lysine, L-ornithine instead of the body-foreign N-methyl-glucamine base and as anion diatrizoate acids. Favourable results concerning clinical and roentgenological aspects of the lysine salt of diatrizoate acid are derived: general and local tolerance in angiographic and urologic examinations are good, pulse rate remains stable, blood pressure fluctuations are minimal.