Category: C
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Cystic bile
Bile stored in the gallbladder. It is concentrated, as opposed to hepatic bile.
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Circular bed
A bed that allows a patient to be turned end-over-end while held between two frames. This permits turning the patients without disturbing them by turning the two frames inside a circular apparatus that holds the ends of the frames. It is useful in treating paralyzed or immobilized patients.
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Captured beat
A ventricular contraction directly stimulated by an electrical impulse either from the sinus node or from the pulse generator of a pacemaker.
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Contrast bath
Alternate immersion of hands or feet in hot water (1 min) then cold water (30 sec) for a prescribed length of time to promote circulation. The initial water temperature should be maintained throughout the bath, and the bath should end with immersion in cold water.
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Continuous bath
A bath administered for an extended period but seldom for longer than several hours. It is used in treating hypothermia or hyperthermia and certain skin diseases.
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Cold bath
A bath in water at a temperature below 65°F (18.3°C).
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Carbon dioxide bath
An effervescent saline bath consisting of water, salts, and carbon dioxide (C02). The natural C02 baths are known as Nauheim baths.
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Cavity base
In dentistry, the lining material placed in a cavity preparation, such as zinc phosphate cement, zinc oxide-eugenol cement, glass ionomer cement, or calcium hydroxide along with small amounts of other medicinal or adhesive materials.
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Chemical barrier
The chemical characteristics of certain areas of the body that oppose colonization by microorganisms. Examples are the acidity of gastric juice and urine, which prevent colonization by most disease-causing germs.
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Cell bank
A facility for keeping cells frozen at extremely low temperatures. These cells are used for investigating hereditary diseases, human aging, and cancer. Collections of banked cells are kept by the National Institutes of Health (the Human Genetic Mutant Cell Repository and the Aging Cell Repository) and at the Cornell Institute for Medical Research.