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Journal of Applied Physiology, 2022
To our knowledge, this study is the first to show an independent association between low resting inspiratory capacity (IC) and, severe exertional dyspnea, exercise limitation, and increased mortality risk, after accounting for the severity of airway obstruction, inspiratory muscle strength, and diffusing capacity.
Denis E O'Donnell, Devin B Phillips
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To our knowledge, this study is the first to show an independent association between low resting inspiratory capacity (IC) and, severe exertional dyspnea, exercise limitation, and increased mortality risk, after accounting for the severity of airway obstruction, inspiratory muscle strength, and diffusing capacity.
Denis E O'Donnell, Devin B Phillips
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Reproducibility of measurements of inspiratory work capacity in cystic fibrosis patients
Respiratory Physiology & Neurobiology, 2006 The evaluation of respiratory muscle endurance (RME) is regarded as being clinically relevant to the assessment of respiratory muscle function. The reproducibility of a non-invasive measure of assessing RME was determined by measuring inspiratory work capacity (IWC) (using a computerised system).
Stephanie, Enright +2 more
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Reliability of inspiratory capacity assessment
Respiratory function technologists/scient., 2020Background: A frequent cause of exercise limitation and dyspnea in COPD is dynamic hyperinflation (DH), which is induced by airflow limitation due to emphysema and small airway disease. Successfully interventions and pharmacotherapy can show reduction of DH.
Tjerk Berens +3 more
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Inspiratory Capacity and Decrease in Lung Hyperinflation with Albuterol in COPD
Chest, 2002Inspiratory capacity (IC) has been proposed as a simple method to assess acute changes in functional residual capacity (FRC) with bronchodilation, assuming that total lung capacity (TLC) is unchanged. This assumption is based on studies using body plethysmography, which may not accurately measure TLC in severely obstructed subjects.
DURANTI R +6 more
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Forced inspiratory measurements and the vital and inspiratory capacities
British Journal of Diseases of the Chest, 1972Abstract Observations on 27 patients with chronic airways obstruction, 5 other patients and 6 healthy subjects indicate that forced inspiratory tests are of limited value. The one-second forced inspiratory volume (FIV 1 ) was found to be dependent on the vital capacity (VC).
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Inspiratory and Expiratory Vital Capacity
Chest, 1984Vital capacity (VC) is frequently measured by two different methods (inspiration vs expiration). The difference in results is not readily available in the literature. The VC was measured both ways in 60 subjects, including many with obstructive airway disease. Only a minor difference in mean VC (75 +/- ml SD) was found.
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A Method for Assessing Small Airways Independent of Inspiratory Capacity
Archives of Environmental Health: An International Journal, 1996Reduced forced vital capacity may confound assessment of small-airway function. In 17 healthy and 16 asthmatic volunteers, we validated a method for measuring mean expiratory flow during the middle half of the forced vital capacity, mean expiratory flow during the third quarter of the forced vital capacity, instantaneous forced expiratory flow at 50 ...
A, Preutthipan, R, Frank, G G, Weinmann
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Effect of fatigue on maximal inspiratory pressure-flow capacity
Journal of Applied Physiology, 1992The inspiratory muscles can be fatigued by repetitive contractions characterized by high force (inspiratory resistive loads) or high velocities of shortening (hyperpnea). The effects of fatigue induced by inspiratory resistive loaded breathing (pressure tasks) or by eucapnic hyperpnea (flow tasks) on maximal inspiratory pressure-flow capacity and rib ...
F D, McCool +4 more
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Inspiratory-expiratory vital capacity test of pulmonary function
The American Journal of Medicine, 1952Abstract 1. 1. A modified technic of vital capacity testing is described. This test can be performed without undue exertion by severely ill patients. It provides information about pulmonary function not available from the conventional expiratory vital capacity procedure, and closely reflects the clinical condition of patients with impairment of ...
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