DRAINAGE DEVICE FOR USE WITH SUCTION OR GRAVITY FLOW

摘要

A drainage apparatus for connection to a patient to drain fluids from the patient's body, particularly from the pleural or cardiac cavities, into a collection chamber has a diaphragm pressure gauge (158) provided on the chamber to directly measure the working pressure therein. The diaphragm is flexible but impervious to the fluids, including air, and in use a pressure differential between the atmosphere and interior of the chamber causes the diaphragm to flex and this motion is translated to display device (166) to indicate the pressure in the chamber.