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[Roentgenographic demonstration of the retrosternal lymph vessels. Animal experiments].

Roentgenographic demonstration of intraperitoneal organs and the retrosternal lymphatic system was obtained by insufflation of tantalum dust (particel size 1-5 mu) into the peritoneal cavity of 21 rats. No inflammatory reactions could be demonstrated. This contrastmedium remained over a considerably period of time in the peritoneal cavity and lymphnodes. This indicates the slow elimination of this metall.