BIOC34H3 Lecture Notes - Spirometer, Restrictive Lung Disease, Inert Gas

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25 Jun 2012
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Bgyc33/cc4 respiratory system study guide, lectures 9-10 (2011) Diaphragm; intercostal muscles; abdominal muscles; chest wall; phrenic nerve. Atmospheric pressure (patm); alveolar pressure (palv); intrapleural pressure (pip) Patm - palv = driving force for air flow in and out of the lungs. Palv - pip = transpulmonary pressure (drives lung expansion) Air flow = (patm - palv) / r. Palv depends on lung volume and the number of moles of gas in the lungs. Inspiration: changes in pressure, volume and the # moles of gas. Expiration: changes in pressure, volume and the # moles of gas. Air flow in and out of the lungs. Fvc and fev1 during obstructive and restrictive lung disease. Sample questions: the following values were obtained using the inert gas technique. Use these volume to calculate the volume of the lung at the time the test began. Concentration of he in the spirometer before the test begins: 20.

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