Diseases increasing airway resistance, respiratory volumes, pulmonary function tests, alveolar ventilation, gas exchange, gas pressure, Dalton's law of partial pressures, Henry's law

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Biomedical Science
BMS 360
Douglas Ishii

23 AprilDiseases Increasing Airway Resistance IIChronic obstructive pulmonary disease COPD Major cause of disability and deathEmphysema Lung tissue loss around alveoli causing airway collapseDifficult to inflate lungs due to loss of elastic tissueShortness of breathSmoking is a major causeChronic bronchitis Loss of ciliated cellsExcess mucous production in the bronchi causing obstruction chronic inflammation of small airwaysAirway resistance is very highSmoking is a major causeEmphysema with chronic bronchitisSmoking can cause bothSimilar to figure 1318Respiratory VolumesTidal volume Volume of air inhaled or exhaled in a single breathRelaxed breathing about 500 mLInspiratory reserve volume IRV The maximum volume in deep inspiration minus the relaxed tidal volumeFunctional residual capacity Volume of air remaining in the lungs afternormal relaxed expirationResidual volume Amount of air remaining in lungs after maximal exhalationExpiratory reserve volume ERV Volume that can be exhaled with maximal effort less the relaxed tidal volumePulmonary Function Tests
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