Category: O
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Ohtahara’s syndrome
A rare cause of encephalopathy and seizures in newborn infants. Also known as early infantile epileptic encephalopathy with suppression bursts, the disease is difficult to treat and has a poor prognosis.
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Ohmmeter
A device for determining the electrical resistance of a conductor. An apparatus utilized for measuring electrical resistance. The scale of this instrument can be calibrated and marked in units of ohms or megohms.
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Ohm’s law
The strength of an electric current, expressed in amperes, is equal to the electromotive force, expressed in volts, divided by the resistance, expressed in ohms (V=IR).
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Oguchi’s disease
Hereditary night blindness with onset in infancy. Commonly found in Japan, the disease is rare in the U.S.
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Ogilvie’s syndrome
Acute intestinal pseudo-obstruction due to intestinal dilatation, mostly of the colon. An individual is playing this syndrome has usually undergone recent severe surgical or medical stress (e.g., myocardial infarction, sepsis, or respiratory failure), may be hospitalized or in intensive care, may have metabolic and electrolyte disturbances, and may have received narcotics.
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Ogbanje
Among the Igbo people of Nigeria, a person who is reborn after birth. In the Igbo culture all humans undergo reincarnation, but some particularly evil children are born over and over again. They suffer terrible illnesses (typically their signs and symptoms match those of sickle cell disease) that inflict revenge upon families that have been…
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Off-label drug use
The use of a drug to treat a condition for which it has not been approved by the U.S. Food and Drug Administration (FDA), especially when such use may relieve unpleasant symptoms, or prove compassionate. During the drug approval process in the U.S., drug manufacturers present carefully accumulated data to the FDA about the safety…
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Office-based
Occurring in an outpatient setting rather than in a hospital or another inpatient setting.
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Office
A room, suite, or building used for professional, commercial, or bureaucratic work.
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Oestrus ovis
A botfly that may cause ocular myiasis in humans.