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16 Ιουλ 2023 · This article looks at lung volumes and capacities, their measurements and effects of common pathology. This division allows for assessment of the mechanical condition of the lungs, its musculature, airway resistance and the effectiveness of gas exchange at the alveolar membrane.
9 Φεβ 2017 · The dynamic lung volumes are mostly derived from vital capacity. While dynamic lung volumes are essential for diagnosis and follow up of obstructive lung diseases, static lung volumes are equally important for evaluation of obstructive as well as restrictive ventilatory defects.
24 Ιουλ 2023 · Lung capacity or total lung capacity (TLC) is the volume of air in the lungs upon the maximum effort of inspiration. Among healthy adults, the average lung capacity is about 6 liters. Age, gender, body composition, and ethnicity are factors affecting the different ranges of lung capacity among individuals.
When two volumes are combined they are referred to as capacities, for example inspiratory reserve volume plus tidal volume is inspiratory capacity. Fig 1 Spirometer trace of a vital capacity manoeuvre in which the subject has breathed in as far as possible before breathing fully out.
Some lung volumes can be measured during spirometry; however, measurement of the residual volume (RV), functional residual capacity (FRC), and total lung capacity (TLC) requires special techniques. FRC is typically measured by one of three methods.
Lung volumes refer to the volume of air in the lungs, measured at various phases of the respiratory cycle. Major lung volumes include the tidal volume, inspiratory reserve volume , expiratory reserve volume , and the residual volume .
Describe the clinical indications for pulmonary function testing. Understand the physiology of the core pulmonary function tests: spirometry, lung volumes and DLCO. Apply an organized approach to interpreting pulmonary function tests.
