Definitions for hemopneumothorax

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  1. Hemopneumothorax

    Hemopneumothorax, or haemopneumothorax, is a medical term describing the combination of two conditions: pneumothorax, or air in the chest cavity, and hemothorax, or blood in the chest cavity. A haemothorax, pneumothorax or both can occur if the chest wall is punctured. To understand the ramifications of this it is important to have an understanding of the role of the pleural space. The pleural space is located anatomically between the visceral membrane, which is firmly attached to the lungs, and the parietal membrane which is firmly attached to the chest wall. The pleural space contains pleural fluid. This fluid holds the two membranes together by surface tension, much as a drop of water between two sheets of glass prevents them from separating. Because of this, when the intercostal muscles move the ribcage outward, the lungs are pulled out as well, dropping the pressure in the lungs and pulling air into the bronchi, when we 'breathe in'. The pleural space is maintained in a constant state of negative pressure. If the chest wall, and thus the pleural space, is punctured, blood, air or both can enter the pleural space. Air/blood rushes into the space in order to equalise the pressure with that of the atmosphere. As a result the fluid is disrupted and the two membranes no longer adhere to each other. When the rib cage moves out, it no longer pulls the lungs with it. Thus the lungs cannot expand, the pressure in the lungs never drops and no air is pulled into the bronchi. Respiration is not possible. The affected lung, which has a great deal of elastic tissue, shrivels in what is referred to as a collapsed lung.

U.S. National Library of Medicine

  1. Hemopneumothorax

    Collection of air and blood in the pleural cavity.

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