Negative-pressure pulmonary edema (NPPE) occurs when a large, negative intrathoracic pressure is generated against an obstructed upper airway, causing fluid to shift into the lung interstitium.

The mechanism of cough syncope involves the increase of intrathoracic pressure, which is transmitted to the intracranial circulation, decreasing cerebral blood flow. Cough syncope is seen most ...

Gentle negative pressure (suction ... Nevertheless, excessive bleeding, sepsis, hemothorax, and damage to other intrathoracic structures are rare complications 11. On occasion, air may be ...