DRAINAGE DEVICE WITH DIVERTED GAS FLOW PATH

摘要

A drainage device having a collection chamber for receiving liquids and gases from the body of a patient, an underwater seal chamber and a oneway outflow valve is disclosed. A partition extending across a portion of the device forms the underwater seal chamber, which prevents the flow of atmospheric air from the device into the pleural cavity of the patient, above the partition and the collection chamber below it. The underwater seal is created at the lower end of an extension connected to the inlet to the device by liquids drained from the patient. The one-way outflow valve communicates with a trap chamber for collecting liquids inadvertently conducted toward said valve. The trap chamber is closed off from the underwater seal chamber but is connected to the collection chamber by means of a passageway through a wall separating the trap and collection chambers. The novel device has little or no liquid contact with the one-way outflow valve and consequently reduced mechanical malfunction.