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A sign of respiratory distress is decreased *breath* sounds. <\/p>\n\n

Subcutaneous *emphysema* is air trapped in the subcutaneous tissue. <\/p>\n\n

Chest tubes prevent *air* or *fluid* from re-entering the pleural space. <\/p>\n\n

A pneumothorax is a collection of *air* in the pleural space. <\/p>\n\n

A *hemothorax* is the accumulation of blood and fluid in the pleural cavity. <\/p>\n\n

The water-seal chamber acts as a one-way *valve*. <\/p>\n\n

*Tidaling* is the fluctuations that occur in the water-seal chamber. <\/p>\n\n

*Waterless* systems provide higher suction pressure levels. <\/p>\n\n

A Heimlich valve is a *flutter* valve designed to replace a drainage unit. <\/p>\n\n

*Milking* the tube can result in increased pressure in the thoracic cavity. <\/p>\n"]}