Intrapulmonary pressure during inspiration
- during expiration intrapulmonary pressure is
- during expiration intrapleural pressure is
- during expiration the intrapulmonary pressure is greater than atmospheric pressure
- does intrapleural pressure increase during expiration
Intrapulmonary pressure vs intrapleural pressure!
Transpulmonary pressure
Mechanics of Breathing
The processes of inspiration (breathing in) and expiration (breathing out) are vital for providing oxygen to tissues and removing carbon dioxide from the body.
Inspiration occurs via active contraction of muscles – such as the diaphragm – whereas expiration tends to be passive, unless it is forced.
In this article, we shall look at the physiology of ventilation – the process of inspiration and expiration, how this differs between quiet and forced breathing, and their clinical correlations.
The Lungs and Breathing
The space between the outer surface of the lungs and inner thoracic wall is known as the pleural space.
This is usually filled with pleural fluid, forming a seal which holds the lungs against the thoracic wall by the force of surface tension. This seal ensures that when the thoracic cavity expands or reduces, the lungs undergo expansion or reduction in size accordingly.
During breathing, the contraction and relaxation of muscles acts to change the volume of the thoracic cavity.
As the thoracic cavity and lungs move together, this chan
- what happens to alveolar pressure during expiration
- what is intrapulmonary pressure during inspiration