Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «R»:
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Resistance, pulmonary
Resistance, pulmonary:
The opposition of the respiratory tree to air flow....
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Resistance, vascular
Resistance, vascular: The opposition to the flow of
blood across a vascular bed. ...
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Resolution
Resolution: In genetics, resolution
refers to the
degree of molecular detail on a physical map of DNA, ranging from low to high....
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Resorb
Resorb:
Literally, to absorb again. To lose substance. Some of a tooth may be resorbed....
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Resorption
Resorption: The process of losing substance. Bone, when
it is remodeled (reshaped), undergoes both new formation and resorption. The cell responsible for the resorption of bone is called an osteoclast....
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Respiration
Respiration: 1. The act of inhaling and exhaling air in order to exchange oxygen for carbon dioxide. Synonymous with breathing and ventilation. 2. The cellular metabolic process by which oxygen is taken in, substances are oxidized, energy is released, and carbon dioxide and oxidized products are giv...
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Respiratory
Respiratory: Having to do with respiration, the exchange of oxygen and carbon dioxide. From the Latin re- (again) + spirare (to breathe) = to breathe again....
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Respiratory disease, acute
Respiratory disease, acute: A sudden condition in which breathing is difficult and the oxygen levels in the blood abruptly drop lower than normal....
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Respiratory distress syndrome (RDS)
Respiratory distress syndrome (RDS): Formerly known as hyaline membrane disease, a syndrome of respiratory difficulty in newborn infants caused by a deficiency of a molecule called surfactant.
RDS almost always occurs in newborns born before 37 weeks of gestation. The more premature the baby is, th...
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Respiratory distress syndrome, acute
Respiratory distress syndrome, acute: Better known as ARDS. See: ARDS....
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Respiratory failure
Respiratory failure: Inability of the lungs to perform their basic task of gas exchange, the transfer of oxygen from inhaled air into the blood and the transfer of carbon dioxide from the blood into exhaled air. The basis of respiratory failure may be failure of the exchange of oxygen and carbon dio...
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Respiratory insufficiency
Respiratory insufficiency: The condition in which the lungs cannot take in sufficient oxygen or expell sufficient carbon dioxide to meet the needs of the cells of the body. Also called pulmonary insufficiency....
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Respiratory papillomatosis, recurrent
Respiratory papillomatosis, recurrent: Recurrent respiratory papillomatosis involves the growth of numerous warty growths in the larynx on the vocal cords in children and young adults.
A baby can contract recurrent respiratory papillomatosis by being contaminated with the human papilloma virus (HPV...
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Respiratory rate
Respiratory rate: The number of breaths per minute or,
more formally, the number of movements indicative of inspiration and expiration per unit time. In practice, the respiratory rate is usually determined by counting the number of times the chest rises or falls per minute. By whatever means, the ai...
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Respiratory syncytial virus
Respiratory syncytial virus: A virus that causes mild respiratory infections, colds, and coughs in adults, but can produce severe respiratory problems, including bronchitis and pneumonia in young children. Persons with compromised immune, cardiac or pulmonary systems are at high risk from respirator...
