A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
128/113
A61B 17/32 (2006.01) A61F 9/007 (2006.01) A61B 17/00 (2006.01)
Patent
CA 1233717
TITLE OF THE INVENTION: OPTHALMIC SURGICAL INSTRUMENT WITH BEVELED TIP AND METHOD FOR MAKING SAID INSTRUMENT ABSTRACT OF THE DISCLOSURE: A surgical instrument for ophthalmic use comprises a rigid outer tubular member and a rigid inner tubular member which is axially slidable within the outer tubular member. The outer tubular member has a closed distal end which is beveled at an oblique angle with respect to the longitudinal axis of the outer tubular member. The outer tubular member is also provided with a distal side wall opening, serving as a cutting port, which occupies at least part of the area covered by the distal beveled portion of the outer tubular member. The inner tubular member has an open and tapered distal end terminating in a cutting edge which is movable into the beveled end of the outer tubular member in order to sever material drawn into the cutting port. The instrument is useful for cutting near the retina since the cutting port is located very close to the instrument tip, and is also advantageous in that the beveled tip can be used to elevate or dissect intraocular material prior to cutting. Premature blade wear is avoided by providing a counter-bevel on the cutting portion of the inner tubular member in order to provide a spacing between the cutting edge and the interior edge of the cutting port. Also disclosed is a method for making the instrument in which an oblique cut is formed through the inner and outer tubular members at the same time.
445658
Helfgott Gerald N.
Helfgott Maxwell A.
Gowling Lafleur Henderson Llp
Helfgott Gerald N.
Helfgott Maxwell A.
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