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Tidal volume (symbol V T or TV) is the volume of air inspired and expired with each passive breath. [1] It is typically assumed that the volume of air inhaled is equal to the volume of air exhaled such as in the figure on the right. In a healthy, young human adult, tidal volume is approximately 500 ml per inspiration at rest or 7 ml/kg of body ...
Learn about the definition, equations, and medical uses of FI O 2, the molar or volumetric fraction of oxygen in the inhaled gas. Find out how FI O 2 is related to Pa O 2, P E O 2, and P I O 2, and how it affects gas exchange and lung injury.
Dead space is the volume of air that does not participate in gas exchange in the lungs. Alveolar dead space is the difference between physiological dead space and anatomical dead space, and it can increase in lung diseases with ventilation-perfusion mismatch.
Vital capacity: the volume of air breathed out after the deepest inhalation. V T: Tidal volume: that volume of air moved into or out of the lungs during quiet breathing (VT indicates a subdivision of the lung; when tidal volume is precisely measured, as in gas exchange calculation, the symbol TV or V T is used.) FRC
Minute ventilation is the volume of gas inhaled or exhaled from a person's lungs per minute. It can be measured or calculated from tidal volume and respiratory rate, and it affects blood carbon dioxide levels.
A spirometer is a device for measuring the volume of air inspired and expired by the lungs. Learn about its purpose, history, and different methods of measurement, such as pressure transducers, ultrasonic, and water gauge.
Lung volumes are the volume of air in the lungs at different phases of the respiratory cycle. The greatest volume of air that can be exhaled is the residual volume (RV), which is the volume remaining in the lungs after a maximal exhalation.
Mouth-to-mouth resuscitation is a form of artificial ventilation that involves blowing air into a person's lungs to assist or stimulate respiration. It is part of cardiopulmonary resuscitation (CPR) and can be performed by different methods depending on the situation and equipment available.