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4. Review the pressure relationships of the thoracic cavity, and understand the definitions and relationships between...

4. Review the pressure relationships of the thoracic cavity, and understand the definitions and relationships between all of the associated terms (atmospheric pressure, respiratory pressure, intrapulmonary pressure, intrapleural pressure, transpulmonary pressure).

Solutions

Expert Solution

Relationship of thoracic cavity with various pressures.

(1)Respiratory pressure- It is termed in comparison with atmospheric pressure. Respiratory pressure gradient is necessary for respiration to take place

(2) Atmospheric pressure- It is the pressure exerted by the air surrounding the body

negative thoracic respiratory pressure is lesser than the atmospheric pressure and positive thoracic respiratory pressure is greater thean the atmospheric pressure.

(3) Intra-pulmonary pressure- It is the pressure within the lungs. It becomes negative after expiration and positive after inspiration

(4)Intrapleural pressure- It is the pressure inside pleura. It is always slightly lesser than the atmospheric pressure

(5)Transpumonary Pressure- It is the pressure difference between the intrapleural space and the alveolar space.Transpulmonary pressure should be slightly positive to prevent collapsing of lungs.

All these pressures should be maintained as told above for respiration to take place.

Nightingale answered 2 years ago
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