Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «R»:
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Reflux surgery (fundoplication)
Reflux surgery (fundoplication): A surgical technique that strengthens the barrier to acid reflux when the lower esophageal sphincter does not work normally and there is gastro-esophageal reflux.
Fundoplication has been the standard surgical method for treating gastro-esophageal reflux disease (GERD...
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Reflux, esophageal
Reflux, esophageal: A condition wherein stomach
contents regurgitate or back up (reflux) into the esophagus (a long cylindrical tube that
transports food from the mouth to the stomach). The food in the stomach is partially
digested by stomach acid and enzymes. Normally, the partially digested acid c...
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Refract
Refract: In ophthalmology, to determine the bending of light that takes place within the human eye.
Refractive errors include nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. Lenses can be used to control the amount of refraction, correcting those errors....
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Refraction
Refraction: In ophthalmology, the bending of light
that takes place within the human eye.
Refractive errors include nearsightedness (myopia), farsightedness
(hyperopia), and astigmatism. Lenses can be used to control the
amount of refraction, correcting those errors....
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Refraction test
Refraction test: Also termed
vision test, the refraction test is an examination that tests an individual's ability to see an object at a specific distance. The test is performed by an optometrist or ophthalmologist in the
doctor's office. The refraction test involves looking through a device to re...
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Refractory
Refractory: Not yielding (at least not yielding
readily) to treatment....
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Refractory anemia
Refractory anemia:
Anemia (a shortage of red blood cells) unresponsive to treatment....
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Refsum disease
Refsum disease: A genetic disorder affecting the
metabolism of the fatty acid phytanic acid. When phytanic acid
accumulates, it causes a number of progressive problems, including
inflammation of numerous nerves (polyneuritis), diminishing vision
due to retinitis pigmentosa, and wobbliness (ataxi...
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Regenerate
Regenerate:
To reproduce or renew something lost. For example, after an injury, the liver has the capacity to regenerate....
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Regimen
Regimen:
With the accent on the first syllable (reg as in Reggie Jackson), a regimen is a plan, a regulated course such as a diet, exercise or treatment, designed to give a good result. A low-salt diet is a regimen....
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Region, regulatory
Region, regulatory: A region of a chromosome that
controls gene expression.
In terms of DNA, it is a regulatory sequence....
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Regional enteritis
Regional enteritis: Crohn's disease, a chronic
inflammatory disease of the intestine primarily in the small and
large intestines but which can occur anywhere in the digestive system between the mouth and the anus.
Named after Burrill Crohn who described the disease in 1932. The disease usually affe...
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Regional lymphadenitis
Regional lymphadenitis:
Cat scratch disease, a mild flu-like infection, with swollen lymph nodes (lymphadenitis) and mild fever of short duration, due to cat scratches, especially from kittens. There is usually a little bump (a papule) which may be pus-filled (a pustule) at the site of the scratch. ...
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Registry
Registry:
Although a registry was originally the place (like Registry House in Edinburgh) where information was collected (in registers), the word registry has also come to mean the collection itself. A registry is usually organized so the data can be analyzed. For example, analysis of data in a tum...
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Registry, tumor
Registry, tumor: See: Tumor registry. And, for more information, see: Cancer registry....
