lung volumes

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lung volumes

Physiology A group of air 'compartments' into which the lung may be functionally divided
Lung volumes  
Expiratory reserve capacity–ERV The maximum volume of air that can be voluntarily exhaled
Functional residual capacity (FRV) Volume left in the lungs at the end of a normal breath which is not normally part of the subdivisions
Inspiratory capacity–IC The maximum volume that can be inhaled
Inspiratory Reserve capacity–IRC The maximum volume that can be inhaled above the tidal volume
Tidal volume–VT The normal to-and-fro respiratory exchange of 500 cc; vital capacity is the maximum amount of exhalable air; after a full inspiration, which added to the residual volume, is the total lung capacity
Total lung capacity–TLC The entire volume of the lung, circa 5 liters
Vital capacity–VC The maximum volume that can be inhaled and exhaled  
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The 10-year longitudinal study was conducted for 673 subjects to assess the effects of toner exposure on respiratory health, using blood and urinary tests, respiratory function tests, chest radiography, as well as self-reported incidences of chronic respiratory symptoms and new-onset respiratory diseases.
Normal respiratory function tests, echocardiography and arterial blood gas analysis held us from earlier intervention even though patient's subjective complaint was impressive.
However, it is known that respiratory distress in the postnatal period including mainly TTN is an independent risk factor for a diagnosis of asthma in childhood; atopy is observed more frequently in children who had been diagnosed as having TTN with the impact of genetic predisposition, and respiratory function tests are most frequently affected by asthma (16).
Respiratory tract complaints and respiratory function tests according to smoking status are shown in Table 2.
As a result of the controversy that has arisen about our use of forced expiration in asthma treatments, we have recently carried out a series of respiratory function tests before and after use of this method.
We also excluded subjects with neurological disorders and those who were not able to perform respiratory function tests. Subjects who smoked, consumed alcohol, or any drugs were excluded after taking their history.
Efficacy was assessed as change from baseline for respiratory function tests, e.g.
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KEY WORDS: air pollution, cell cycle, cohort study, genes, respiratory function tests. Environ Health Perspect 117:1420-1427 (2009).
Results will be measured using standardised respiratory function tests, EMG analysis of muscle recruitment and respiratory-inductance plethysmography (RIP) (2) during vocal tasks, and acoustic voice analysis.
Other aspects of care which GPs now undertake include the monitoring of potentially-toxic medication like Warfarin, ECGs and respiratory function tests.

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