Water-Soluble Contrast Media

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Abstract
Barium remains as the agent of choice in the routine radiographic study of the gastrointestinal tract. In gastrointestinal obstruction, barium is often contraindicated as inefficient or dangerous.5The water-soluble media are of value at such times as they possess unusual properties which enhance their effectiveness in diagnosing gastrointestinal obstructions with safety. Properties The water-soluble media (diatrizoate sodium [Hypaque] was used in this study) are stable aqueous solutions. Therefore, they do not impact or inspissate in the enteric tract.7They are completely miscible with gastrointestinal secretions and with blood.6In perforating lesions, they may enter the peritoneal cavity without resultant side-effects and they have been found to disappear from the peritoneal cavity rapidly.6,7They are also harmless in the biliary tree, pleural cavity, and lung, where again they disappear readily. These materials have a very low viscosity (Fig. 1) enabling them to traverse partial obstructions with ease,

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