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Lecture

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


Department
Biological Sciences
Course Code
BIOC34H3
Professor
F

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BGYC33/CC4 Respiratory System Study Guide, Lectures 9-10 (2011)
Lecture 9: Pulmonary Mechanics
Topics
The Respiratory Tract
Conducting Zone
Respiratory Zone
Blood Flow to the Lungs
Thoracic Cavity and Respiratory Muscles
Diaphragm; Intercostal Muscles; Abdominal Muscles; Chest Wall; Phrenic Nerve
Inspiration
Expiration
The Pleura
Parietal Pleura; Visceral Pleura; Pleural Space
Pulmonary Pressures
Atmospheric Pressure (Patm); Alveolar Pressure (Palv); Intrapleural Pressure (Pip)
Important Pressure Differences
Patm - Palv = Driving force for air flow in and out of the lungs
Palv - Pip = Transpulmonary Pressure (drives lung expansion)
Damage to the Pleura / Pleural Space
Pneumothorax
Tension Pneumothorax
Haemothorax
Pleural Effusion
Asbestosis
Air Flow In and Out of the Lungs
Ideal Gas Law
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
Pressure Volume Changes during Inspiration
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