Patent ID: 6723065
Filing Date: 2004-04-20
Classification: A61F,A61M

Abstract:
An intraocular surgical apparatus comprising:an introduction tube for introducing perfusate into a closed intraocular affected part; a discharge tube for discharging the affected part together with the perfusate; a perfusate feed passage connected to the introduction tube, the perfusate feed passage incorporating a perfusate reservoir capable of feeding the perfusate with a predetermined rest liquid head pressure and a control valve for controlling the amount of the perfusate to be fed from the perfusate reservoir to the introduction tube; a discharge passage connected to the discharge tube, the discharge passage incorporating a suction pump; wherein the perfusate feed passage further incorporates, at a passage portion thereof from the control valve to an outlet opening of the introduction tube, a pressure-reduction compensating means capable of feeding a supplementary amount of the perfusate into the closed intraocular affected part through a supplementing passage having a smaller passage resistance than the perfusate feed passage in the event of and in association with abnormal pressure reduction inside the affected part; wherein the pressure-reduction compensating means includes a supplementary perfusate reservoir storing a portion of the perfusate flowing within the perfusate feed passage and acting as the supplementing passage and a gas reservoir for reserving gas compressed under the predetermined rest liquid head pressure of the perfusate reservoir; and wherein the supplementary perfusate reservoir and the gas reservoir of the pressure-reduction compensating means are constructed in the form of a single flexible continuous tube.