forced vital capacity


Also found in: Dictionary, Thesaurus, Legal, Financial, Acronyms, Encyclopedia.

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.

forced vi·tal ca·pac·i·ty (FVC),

vital capacity measured with the subject exhaling as rapidly as possible; data relating volume, expiratory flow, and time form the basis for other pulmonary function tests, for example, flow-volume curve, forced expiratory volume, forced expiratory time, forced expiratory flow.

forced vital capacity

FVC Pulmonary medicine The volume of air exhaled with maximum effort and speed after a full inspiration; FVC is usually ↓ and thus is a major parameter measured in obstructive airways disease, a term that encompasses both asthma and COPD

forced vi·tal ca·pac·i·ty

(FVC) (fōrst vī'tăl kă-pas'i-tē)
Vital capacity measured with the subject exhaling as rapidly as possible.

forced vital capacity

The amount of air that can be expelled from the lungs by breathing out for as long as possible after a full inspiration. See also FORCED EXPIRATORY VOLUME.
References in periodicals archive ?
Obstructive disorder with reduced forced vital capacity was considered when the difference between FVC and [FEV.sub.1] for the pre-bronchodilator phase was less than or equal to 12%.
Forced vital capacity (FVC) is the total amount of air the child can exhale forcibly after maximal inhalation.
Pulmonary function testing performed 21 months after initial surgery revealed forced expiratory volume in the first second, of 2.1 L (74% of the predicted volume), forced vital capacity of 2.76 L (79% of the predicted capacity), and forced expiratory volume in the first second/forced vital capacity ratio of 76%.
It is generally accepted that forced expiratory volume in 1 second (FEV1) and Forced vital capacity (FVC) are strong indicators of lung function, which decline due to obesity and sedentary life style [16, 17].
The primary variables measured included forced vital capacity (FVC), forced expired volume in one second (fEv1), FVC/FEV1, peak expiratory flow rate (PEFR), and maximal voluntary ventilation (MVV).
On tests of forced vital capacity and forced expiratory volume in one second, breastfeeding for four months or longer was linked to better scores in kids whose moms had asthma.
Similarly, azithromycin failed to improve other indicators of pulmonary function, such as forced vital capacity and forced midexpiratory flow rate.
More specifically, the purpose of this study was to compare forced vital capacity (FVC), forced expiratory volume in one second as a percent of forced vital capacity (FEV1/FVC%), maximum inspiratory pressure (MIP), and maximum expiratory pressure (MEP) values obtained during standing, sitting, forward sitting, supine, and prone positions.
Lung function assessment included forced vital capacity (FVC), forced expiratory volume and peak expiratory flow (PEF).
Four patients show a significant slowing down of the linear decline of the forced vital capacity and of the ALS-FRS score.
Simple spirometry includes forced vital capacity (FVC), graphed as either a time-volume curve or as a flow- volume loop, slow vital capacity (SVC), and maximum voluntary ventilation (MVV).
A significant correlation was noted between disease extent score and forced vital capacity (FVC) (r = -0.76; P=0.003), forced expiratory volume in one second ([FEV.sub.1])(r = -0.74; P = 0.005), total lung capacity (TLC) (r = -0.66; P = 0.037), oxygen saturation in arterial blood (Sa[O.sub.2]) (r = -0.69, P = 0.01), diffusion capacity of the lung (DLco) (r = -0.8; P = 0.02).