| RF | radial fiber; radio frequency; receptive field; regurgitant fraction; Reitland-Franklin [unit]; rela... |
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| Rf | respiratory frequency; rutherfordium |
| RFT | respiratory function test; rod-and-frame test; right frontotransverse [fetal position] |
| RICU | respiratory intensive care unit |
| RIP | radioimmunoprecipitation; reflex inhibiting pattern; respiratory inductance plethysmography |
| respiratory failure, chronic |
Chronic inability of the respiratory system to maintain the function of oxygenating blood and remove carbon dioxide from the lungs. Many diseases can cause chronic pulmonary insufficiency, including asthmatic airway
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| respiratory frequency to tidal volume ratio |
ABBR: f/VT. In mechanical ventilation, a measure of the speed and depth of spontaneous breathing, used to gauge a patient's dependency on life support. The higher the ratio, the less likely it is that
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| respiratory function monitoring |
The use of various techniques to provide alarms that alert a patient's attendants to a change in the ability of the lungs to perform their functions. These techniques include noninvasive devices for measuring the
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| respiratory index |
The ratio of the alveolar-arterial oxygen tension gradient to the arterial partial pressure of oxygen.
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| respiratory membrane |
Alveolocapillary membrane .
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