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Radiographic Examination of Normal Motility

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The Pyloric Sphincteric Cylinder in Health and Disease

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Abstract

In radiographic studies of the upper gastrointestinal tract, only the contrast material in the lumen is visible, the actual walls of the tract being invisible. The contrast material usually consists of one or more of the following:

  1. 1.

    Insoluble, non-absorbable barium sulphate in fluid suspension. Where such a suspension is used, it represents the luminal contents, and being radio-opaque, is visualized as an image of positive contrast. In the “conventional” radiographic study a low-density barium suspension is used with a specific gravity of 2.004 and a viscosity approximately four times that of water. The consistency approximates that of thick soup but may, if required, be increased to that of a paste. Commercial preparations contain additives regulating consistency and taste.

  2. 2.

    Water-soluble, absorbable iodine-containing solutions, also providing images of positive contrast, but with lower radio-opacity than barium.

  3. 3.

    Air, which may be swallowed or introduced via tubes, providing negative contrast.

  4. 4.

    Carbon dioxide gas, affording an intraluminal, negative contrast agent. The gas is liberated in the lumen by swallowed, commercially available gas-producing granules or powders.

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Authors and Affiliations

  1. 25 Chavonnestreet, Welgemoed Bellville, 7530, South Africa

    Dr. Albertus D. Keet

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© 1993 Springer-Verlag Berlin Heidelberg

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Keet, A.D. (1993). Radiographic Examination of Normal Motility. In: The Pyloric Sphincteric Cylinder in Health and Disease. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-77708-0_13

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  • DOI: https://doi.org/10.1007/978-3-642-77708-0_13

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-77710-3

  • Online ISBN: 978-3-642-77708-0

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