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A rectal injection for clearing out the bowel, or administering drugs or food. [G.]

- air contrast e. a radiographic double contrast e. in which air is introduced after coating of the colon with a dense barium suspension. SYN: air contrast barium e., double contrast e..

- air contrast barium e. SYN: air contrast e..

- analeptic e. an e. of a pint of lukewarm water with one-half teaspoonful of table salt.

- barium e. a type of contrast e.; administration of barium sulfate suspension, a radiopaque medium, for radiographic and fluoroscopic study of the lower intestinal tract.

- blind e. the introduction into the rectum of a rubber tube to facilitate the expulsion of flatus.

- contrast e. e. using barium sulfate or a water-soluble contrast medium.

- double contrast e. SYN: air contrast e..

- flatus e. an e. of magnesium sulfate in glycerin and warm water.

- high e. an e. instilled high up into the colon. SYN: enteroclysis (1).

- Hypaque e. e. with water-soluble radiographic contrast material, whether diatrizoate or other.

- nutrient e. a rectal injection of predigested food.

- oil retention e. a rectal injection of mineral oil, introduced at low pressure and retained for several hours before expelling, to soften feces.

- small bowel e. radiographic examination of the small intestine, by retrograde filling from the contrast-filled large bowel. Cf.:enteroclysis, small bowel series.

- soapsuds e. an e. of shredded or powdered soap in warm water.

- turpentine e. an e. of turpentine and olive oil in soapsuds.

en·e·ma 'en-ə-mə n, pl enemas also ene·ma·ta .en-ə-'mät-ə, 'en-ə-mə-tə

1) the injection of liquid into the intestine by way of the anus (as for cleansing or examination)

2) the liquid injected by an enema

n. (pl. enemata or enemas)

a quantity of fluid infused into the rectum through a tube passed into the anus. An evacuant enema (soap or olive oil) is used to remove faeces. A therapeutic enema is used to insert drugs into the rectum, usually corticosteroids in the treatment of proctocolitis. See also barium enema, small-bowel enema.