Patent ID: 6283937
Filing Date: 2001-09-04
Classification: A61M

Abstract:
An irrigation/aspiration apparatus for aspirating and discharging drainage inside an eye to be examined with a handpiece to which an aspiration tube is connected, the apparatus comprising:a peristaltic suction pump which produces suction pressure through the aspiration tube;a sensor which detects the suction pressure inside the aspiration tube;a suction pressure reducing means for reducing the suction pressure when the suction pressure detected by the sensor is above a preset value;a chamber having one end in communication solely with the aspiration tube, said communication occurring between the handpiece and the peristaltic suction pump, and said chamber being hermetically closed off from atmosphere;a bag filled with gas disposed inside the chamber, said bag having a portion made of an expansible and contractible material; anda limiter which limits expansion of the bag within a preset range when the aspiration tube is closed so that withering of an anterior chamber of the eye is prevented.