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Double and multiple lumen chest drainage tube
Double and multiple lumen chest drainage tube
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机译：双腔多腔胸腔引流管
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摘要
A double-lumen chest drainage tube is employed to remove a mixture of air, blood and fluids from a pleural cavity following lung surgery. The drainage tube is constructed of a polymeric inner tube having large but few aspirating perforations surrounded by a connected, spaced-apart, outer tube defining numerous smaller perforations. The outer and inner tubes are separated by septa to prevent collapse of the tubes. When a relatively high suction pressure is applied to the inner tube, the suction pressure is transmitted through the large, few perforations in the inner tube to the space between the two tubes, where the negative aspirating pressure is to be equalized and evenly distributed. When this equalized aspirating pressure is transmitted to the numerous small perforations of the outer tube to the pleural cavity, the negative pressure per square centimeter becomes considerably reduced due to a substantially increased surface area of these numerous, small perforations of the outer tube. of it will become evenly distributed. This will reduce the possibility of sucking the lung or soft tissues onto the chest drainage tube and blocking the tube perforations. Multiple double lumen tubes can be bonded together using thin, polymeric severable membranes with a single common connector being attached to one end of the tubes. After the double lumen tubes are inserted into the chest cavity through a single entry in the chest wall, they can be severed to form individual double lumen tubes which can be positioned to drain various sites inside the chest cavity. The reduction of insertion sites lessens the possibility of potential chest tube site infections.
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