Intraocular irrigation/aspiration device
First Claim
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1. An intraocular irrigation/aspiration device for aspirating emulsified material from an intraocular cavity, the device comprising:
- a sleeve having proximal and distal ends, the proximal end adapted to be coupled to an irrigation source; and
a rigid shaft disposed concentrically in the sleeve and spaced apart from the sleeve to define an annular irrigation channel, the shaft having proximal and distal ends, and a lateral surface, the proximal end adapted to be coupled to a suction source, the distal end of the shaft disposed in fixed relation extending beyond the distal end of the sleeve and comprising a tip including an opening in the lateral surface having a pre-selected size, a lumen extending from the opening to the proximal end, the lumen having a first portion defining a chamber with a first cross-sectional area that communicates with the opening, and a second portion with a second cross-sectional area disposed between the chamber and the proximal end, the second cross-sectional area being smaller than the first cross-sectional area, wherein the first and second cross-sectional areas and pre-selected size of the opening are selected to control pressure fluctuations in the intraocular cavity arising from post-occlusion surge events.
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Abstract
An intraocular irrigation/aspiration device (10) including a hollow shaft (12) with a distal tip portion (20) and a proximal portion (24). The shaft (12) includes a lumen (18) extending through the shaft (12) wherein the lumen (18) is of reduced cross-sectional area in the proximal portion (24) so as to regulate aspiration of fluid and reduce post occlusion surge phenomena. Preferably, the device (10) includes an outer sleeve (26) which is flexible so as to enable a small incision in the eye to engage closely with the shaft (12).
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19 Claims
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1. An intraocular irrigation/aspiration device for aspirating emulsified material from an intraocular cavity, the device comprising:
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a sleeve having proximal and distal ends, the proximal end adapted to be coupled to an irrigation source; and
a rigid shaft disposed concentrically in the sleeve and spaced apart from the sleeve to define an annular irrigation channel, the shaft having proximal and distal ends, and a lateral surface, the proximal end adapted to be coupled to a suction source, the distal end of the shaft disposed in fixed relation extending beyond the distal end of the sleeve and comprising a tip including an opening in the lateral surface having a pre-selected size, a lumen extending from the opening to the proximal end, the lumen having a first portion defining a chamber with a first cross-sectional area that communicates with the opening, and a second portion with a second cross-sectional area disposed between the chamber and the proximal end, the second cross-sectional area being smaller than the first cross-sectional area, wherein the first and second cross-sectional areas and pre-selected size of the opening are selected to control pressure fluctuations in the intraocular cavity arising from post-occlusion surge events. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification