bolus (redirected from boluses)

bolus /bo·lus/ (bo´lus)

1. a rounded mass of food or pharmaceutical preparation ready to swallow, or such a mass passing through the gastrointestinal tract.

2. a concentrated mass of pharmaceutical preparation, e.g., an opaque contrast medium, given intravenously.

3. a mass of scattering material, such as wax or paraffin, placed between the radiation source and the skin to achieve a precalculated isodose pattern in the tissue irradiated.

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bo·lus (bls)

n. pl. bo·lus·es

1. A round mass.

2. A single, relatively large dose of a drug that is administered for therapeutic purposes and taken orally.

3. A concentrated mass of a pharmaceutical substance administered intravenously for therapeutic or diagnostic purposes.

4. A soft mass of chewed food within the mouth or alimentary canal.

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bolus

[bō′ləs]

Etymology: Gk, bolos, lump

1 also called alimentary bolus, a round mass, specifically a masticated lump of food ready to be swallowed.

2 a large round preparation of medicinal material for oral ingestion, usually soft and not prepackaged.

3 a dose of a medication or a contrast material, radioactive isotope, or other pharmaceutic preparation injected all at once intravenously.

4 (in radiotherapy) material used to fill in irregular body surfaces to improve dose distribution for hyperthermia or to increase the dose to the skin when high-energy photon beams are used.

5 a clumping in the stomach of ingested foreign material, often the result of habitual behavior.

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bolus (bō´ls),

n a mass of food ready to be swallowed or a mass passing through the intestines.

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bolus

1. a rounded mass of food or pharmaceutical preparation ready to be swallowed, or such a mass passing through the gastrointestinal tract. In previous times most medication for horses was given by bolus. Called also ball.

2. a concentrated mass of pharmaceutical preparation, e.g. an opaque contrast medium, given intravenously.

3. a mass of scattering material, such as wax or paraffin, placed between the radiation source and the skin to achieve a precalculated isodose pattern in the tissue irradiated.

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alimentary bolus

the mass of food, made ready by mastication, that enters the esophagus at one swallow.

intraruminal identification bolus

contain passive radiofrequency responders for individual animal identification. Used in sheep and cattle.

physic bolus

see physic (2).

purging bolus

an oldtime treatment for equine colic. Usually contained aloes or istin.

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bolus

1. Any concentrate given as a single dose to achieve an immediate effect 2. Any mass or blob–eg, masticated food, in transit through a tube Endocrinology An extra boost of insulin given to cover expected rise in blood glucose–sugar such as the rise that occurs after eating Therapeutics A large IV dose of a drug given “all at once” at the beginning of treatment, which raises the concentration in the body to a therapeutic level