Auger nucleus extracted for cataracts
First Claim
Patent Images
1. A surgical instrument for removing a lens nucleus from an eye comprising:
- a tubular member having an opening at its distal end;
a shaft at least partially disposed within the tubular member, the shaft having an auger disposed at its distal end and including a threaded portion;
a retractable guide slidably disposed within the tubular member and threadably engaging the threaded portion of the shaft; and
,a catch basket having an open position and a closed position, the catch basket operatively engaging the retractable guide such that, when the retractable guide is moved distally, the basket advances through the opening of the tubular member, and, such that, rotation of the shaft with respect to the retractable guide rotates the auger and retracts the basket at least partially into the tubular member.
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Abstract
A surgical instrument for removing the cataractous nucleus from the eye. The instrument consists of a proximal handle and plunger. The plunger also acts as a screw-drive for an auger located at the distal end of the instrument. The screw-drive plunger is advanced exposing a nucleus encasing basket at the distal end of the instrument. The nucleus is completely encased in the distal basket and slowly ground up by the auger, removing the nucleus from the eye in its entirety. The use of unique internal gearing between the auger and encasing element results in a safe, efficient, controllable evacuation of the nucleus from the eye.
122 Citations
16 Claims
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1. A surgical instrument for removing a lens nucleus from an eye comprising:
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a tubular member having an opening at its distal end; a shaft at least partially disposed within the tubular member, the shaft having an auger disposed at its distal end and including a threaded portion; a retractable guide slidably disposed within the tubular member and threadably engaging the threaded portion of the shaft; and
,a catch basket having an open position and a closed position, the catch basket operatively engaging the retractable guide such that, when the retractable guide is moved distally, the basket advances through the opening of the tubular member, and, such that, rotation of the shaft with respect to the retractable guide rotates the auger and retracts the basket at least partially into the tubular member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification