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Laboratory 5 - Laboratory 5 Respiratory Function and Lung...

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Laboratory 5 – Respiratory Function and Lung Volumes David Jones
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INTRODUCTION: The following lab report will be an evaluation of respiratory function. This is an important part of early diagnosis and management of pulmonary diseases like emphysema, chronic bronchitis, asthma, and pneumonia. These tests involve and determine various lung volumes and air flow rates. Deterioration or improvements in lung function can then be followed by testing the lungs periodically. This allows for influences or margin of error of environment, lifestyle, and age to be evaluated and factored into account. METHODS: The purpose of this study is to learn and familiarize the procedures for measuring very basic skills and parameters of lung function. These measures are often measured in a clinical setting using clinical exercise physiological laboratories to examine those that suffer from a chronic obstructive pulmonary disease. This lab will measure the following: Forced Vital Capacity (FVC; liters) = maximum volume of gas that can be exhaled from the lungs quickly following a maximum inspiration. Forced Expiratory Volume 1.0 (FEV1; liters) = maximum volume of gas that can be exhaled from the lungs in a 1-sec time period following a maximum inspiration.
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Ratio of Forced Expiratory Volume 1.0 to forced vital capacity (FEV1/FVC; %) = This expresses the FEV1 as a percentage of the FVC. Forced Expiratory flow at 25% of the forced vital capacity (FEF 25%; liters/second) = This is the flow rate during an FVC trial at 25% of the FVC. Forced Expiratory flow at 50% of the forced vital capacity (FEF 50%; liters/second) = This is the flow rate during an FVC trial at 50% of the FVC. Forced Expiratory flow at 75% of the forced vital capacity (FEF 75%; liters/second) = This is the flow rate during an FVC trial at 75% of the FVC. Maximum forced expiratory flow (FEF Max; liters/second) = This is the maximum flow rate achieved during an FVC trial.
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