Intrapleural pressure and pneumothorax

Discussion in 'Step I' started by AZ7, Aug 2, 2015.

  1. AZ7

    AZ7
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    Page 603 FA2015 says that negative intrapeural pressure prevents pneumothorax.
    Mechanism?
     
  2. seminoma

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    Intraalveolar pressure is 0. Positive IPP would collapse the lung. Just like if you were to fill an air balloon with RA then put it under positive pressure.
     
  3. pathologyDO

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    Alveoli | intra pleural space

    Two ways to keep alveoli open, one is to increase positive alveolar pressure ( via gas) or two, increase the negative pressure in the intra pleural space. Your chest wall has tension placed on it in a way that it wants to move anteriorly ->.this pulls on the pleura and creates a negative pressure, which also pulls on the alveolar walls keep them open

    Pathoma has a really good explanation of this I suggest watching his vid if you have a subscription
     
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