Surgery – Truss – Pad
Patent
1983-02-08
1985-07-23
Thaler, Michael H.
Surgery
Truss
Pad
128305, 30362, A61B 1734
Patent
active
045303592
ABSTRACT:
A surgical instrument for ophthalmic use comprises a rigid elongated outer tubular member which terminates in a closed distal end immediately adjoining a distal side opening. A flexible elongated wire is arranged within the outer tubular member and extends in a direction generally parallel to the longitudinal axis of the outer tubular member. The wire is axially movable within the outer tubular member and has a sharp distal end which is positioned in proximity to the distal side opening. The closed distal end of the outer tubular member is provided with an interior curvature which functions as a deflecting member to deflect the distal end of the wire so that the wire projects through the distal side opening at an angle relative to the longitudinal axis of the outer tubular member when the wire is moved axially toward the distal end of the outer tubular member. The wire may be supported by an inner tubular member which is slidable within the outer tubular member and which also functions to conduct an infusion fluid to the instrument tip. Modifications to the basic embodiment include the use of a fixed length of small diameter inner guide tubing as the deflecting member to guide the distal portion of the wire in the direction of the distal side opening in the outer tubular member, and the formation of the wire as a ribbon-like extension of the slidable inner tubular member which serves as the infusion conduit. A surgical method employing the perforating instrument is also disclosed.
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Helfgott Gerald N.
Helfgott Maxwell A.
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