RESPIRATORY PRESSURES
1. Intrapleural pressure: The intrapleural pressure is the pressure existing in pleural cavity, that is, in between the visceral and parietal layers of pleura. It is exerted by the suction of the fluid that lines the pleural cavity. It is also called intrathoracic pressure since it is exerted in the whole of thoracic cavity.
The normal values are:
- At the end of normal inspiration: -6mmHg
- At the end of normal expiration: -2mmHg
- At the end of forced inspiration: -30mmHg
2. Intra alveolar pressure:
Intra alveolar pressure is the pressure existing in the alveoli to the lungs. It is also known as intrapulmonary pressure
The normal values are:
1. During normal inspiration: -1mmHg
2. During normal expiration: +1mmHg
![](https://thefuturedentistry.com/wp-content/uploads/2021/06/Respiratory-System-4.jpg)