HTHSCI 1H06 Lecture Notes - Lecture 41: Obstructive Lung Disease, Scoliosis, Lung Volumes

• School: McMaster University
• Department: Health Sciences
• Course: HTHSCI 1H06
• Professor: Alexander Ball

Document Summary

Ventilation - movement of air into and out of the lungs. Respiration - exchange of gases (oxygen and carbon dioxide) Happens between tissues and blood, between blood and lungs. Dead space - the part of the airway closest to the mouth/nose that does not exchange gases with blood -- the last 150ml of each breath lls dead space and is then breathed out again without any gas exchange. Upside down bell that oats in water. Pt breathes into the bottom of that valve. Moves a pully up and down (attached to a pen) creating a graph. ** lung volume graph on slides ** Rates of ventilation is dependent on breathing frequency, and how much air you move per breath. Minute ventilation = rate that air moves in and out of mouth. In the respiratory system, the source of the negative pleural pressure to keep the lungs in ated is the outward recoil of the chest wall.