Perforation of the normal colon during barium contrast examination.

Two cases of perforation of the normal colon during barium contrast examination are reported. Overdistention of the colon with air and barium contrast examination are reported. Overdistention of the colon with air and barium should be avoided in a patient with a competent ileocecal value. While rare, this complication can be life-threatening.

The use of velour as a vascular prosthesis.

Knitted Dacron cloth fabricated into tubes has gained widespread acceptance as an arterial prosthesis. Continued research and development in the field of vascular prostheses is required because existing materials are not ideal. This paper relates general developments in vascular prosthesis research and focuses on specific results with Dacron velour materials. The nature of the velour surface offers several advantages that are important in designing a more satisfactory prosthesis.