Unit 17 Pulmonary Testing Study Q's!

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Biomedical Physio & Kines
BPK 142
Craig Asmundson

LAB #8–P ULMONARY FUNCTION T ESTING How would the following pulmonary function measurement be changed in a person with a) asthma or chronic bronchitis, and b) pneumonia or pulmonary fibrosis?:  Vital capacity – the maximum amount of air that can be inhaled or exhaled from the lung  FEV1.0– Forced Expiratory Volume in 1 the volume of air expired during the first 1.0 seconds of a forced vital capacity maneuver; helpful in determining the amount of lung obstruction  Maximal breathing capacity – the max volume of air which may be breathed during maximum effort a) Asthma and chronic bronchitis (obstructive lung diseases): Asthma – bronchial tubes are extra sensitive, therefore becoming inflamed and produce excess mucus. The muscles around the airways tighten making the airways narrower.During an acute attack, the airways narrow further due to bronchopaincreased airway resistance. Chronic bronchitis – inflammation and irritation of the airways (bronchial tubes) of the lungs o Vital capacity  due to constricted bronchioles o FEV1.0 o FEV1.0VC ratio  o Maximal breathing capacity  b) Pneumonia and pulmonary fibrosis (restrictive lung diseases): Pneumonia – Lung inflammation caused by bacterial or viral infection, in which the air sacs fill withpus and may become solid Pulmonary fibrosis – A condition in which excessive scar tissue forms in the lungs, making them stiff, decreasing the amount of surface area that is available to provide gas exchange andinterfering with their function o Vital capacity will be lower o FEV 1.0l be around normal or lower o FEV 1.0C ratio will be around normal or higher o Maximal breathing capacity will be around normal or lower Explain the difference between gas volumes at ATPS, STPD, and BTPS. With ATPS (Atmospheric Temperature and Pressure Saturated),the conditions are unchanged from the time the respiratory gas volume is measured. WithSTPD (Standard Temperature and Pressure Dry), volumes are corrected to conditions ofstandard temperature, and pressure, dry, which are 0 C or 273K, 1 atmosphere of pressure or 760 mm Hg, and free of water vapour. With BTPS (Body
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