functional residual capacity


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capacity

 [kah-pas´ĭ-te]
the power to hold, retain, or contain, or the ability to absorb; usually expressed numerically as the measure of such ability.
closing capacity (CC) the volume of gas in the lungs at the time of airway closure, the sum of the closing volume and the residual volume. See also closing volume.
decreased intracranial adaptive capacity a nursing diagnosis accepted by the North American Nursing Diagnosis Association, defined as the state in which intracranial fluid dynamic mechanisms that normally compensate for increases in intracranial volumes are compromised, resulting in repeated disproportionate increases in intracranial pressure in response to a variety of noxious and nonnoxious stimuli.
diffusing capacity see diffusing capacity.
forced vital capacity the maximal volume of gas that can be exhaled from full inhalation by exhaling as forcefully and rapidly as possible. See also pulmonary function tests.
functional residual capacity the amount of gas remaining at the end of normal quiet respiration.
heat capacity the amount of heat required to raise the temperature of a specific quantity of a substance by one degree Celsius.
inspiratory capacity the volume of gas that can be taken into the lungs in a full inhalation, starting from the resting inspiratory position; equal to the tidal volume plus the inspiratory reserve volume.
maximal breathing capacity maximum voluntary ventilation.
thermal capacity heat capacity.
total lung capacity the amount of gas contained in the lung at the end of a maximal inhalation.
 Subdivisions of total lung capacity: TLC, total lung capacity; V, tidal volume; IC, inspiratory capacity; FRC, functional residual capacity; ERV, expiratory reserve volume; VC, vital capacity; RV, residual volume. From Dorland's, 2000.
virus neutralizing capacity the ability of a serum to inhibit the infectivity of a virus.
vital capacity (VC) see vital capacity.

func·tion·al re·sid·u·al ca·pac·i·ty (FRC),

the volume of gas remaining in the lungs at the end of a normal expiration; it is the sum of expiratory reserve volume and residual volume.

functional residual capacity

Lung medicine The volume of air that remains in the lungs after a normal–ie not forced–expiration Components Expiratory reserve volume, residual volume See Lung volumes. Cf Total lung capacity, Vital capacity.

func·tion·al re·sid·u·al ca·pac·i·ty

(FRC) (fŭngk'shŭn-ăl rĕ-zid'yū-ăl kă-pas'i-tē)
The volume of gas remaining in the lungs at the end of a normal expiration; it is the sum of expiratory reserve volume and residual volume.
Synonym(s): functional residual air.

func·tion·al re·sid·u·al ca·pac·i·ty

(FRC) (fŭngk'shŭn-ăl rĕ-zid'yū-ăl kă-pas'i-tē)
The volume of gas remaining in the lungs at the end of a normal expiration; it is the sum of expiratory reserve volume and residual volume.
References in periodicals archive ?
Effects of barbiturate anaesthesia on functional residual capacity and ribcage/diaphragm contribution to ventilation, Anesthesiology.
At the end of a normal breath or functional residual capacity (FRC), the mouth shutter distal to a pressure transducer is closed.
Positive end-expiratory pressure (PEEP) is used to improve gas exchange, increase functional residual capacity, recruit air spaces, and decrease pulmonary shunt in patients suffering from respiratory failure.
Because positive end-expiratory pressure (PEEP) increases functional residual capacity, decreases pulmonary shunt and recruits air spaces, it is clinically applied to improve gas exchange in patients suffering from respiratory failure (1-4).
When an infant is born at or before 28 weeks' gestation, the infant frequently lacks pulmonary surfactant because of pulmonary immaturity, and is unable to establish a functional residual capacity. Consequently, the infant experiences alveolar collapse at the end of every expiration.

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