Background: Idiopathic spontaneous pneumothorax (ISP) results from rupture of blebs, bullas, or diseased alveolar walls. Initiating mechanisms may relate to increased transpulmonary pressure.

This air buildup puts pressure on the lung ... disease), or unless the underlying disease cause tension or open pneumothorax.

Finally, it may be hypothesized that changes in Patm do not influence the incidence of pneumothorax but that they increase subsequent symptoms and, thereby, favor their recognition. We have no way ...