Nuclear hydrolysis cannula
First Claim
1. A nuclear hydrolysis cannula for use in removing cataracts during the phases of hydrodissection and hydrodelamination/hydrodelineation/hydrodemarcation, comprising:
- a hub portion having a proximal end, a distal end, and a centrally disposed longitudinal axis;
a one-piece needle having a straight first section a curved second section, a first end at said first section, and a second end at said second section, said first end being mounted in said distal end of said hub portion with said needle extending forwardly beyond said distal end, said first section being coaxial with said longitudinal axis of said hub, said second section extending away from said longitudinal axis and terminating at said second end without curving inwardly towards said longitudinal axis, and said second end being trucated to define a beveled surface and having a sharpened edge with a rounded tip.
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Accused Products
Abstract
A cannula for use in cataract surgery during the phases of hydrodissection and hydrodelamination/hydrodelineation/hydrodemarcation is described. The cannula has a hub for mating with a syringe and a needle originating from the distal end of the hub. The needle comprises a first section, second section, and truncated surface. The first section originates from the distal end of the hub and extends forward in a plane delineating the central longitudinal axis of the cannula. The second section originates from the distal end of the first section and is flattened and curved away from the central longitudinal axis of the hub. The truncated surface of the needle forms a rounded tip with beveled surfaces. The intersection of the bevel and sides of the cannula are sharpened to provide a cutting edge.
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Citations
26 Claims
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1. A nuclear hydrolysis cannula for use in removing cataracts during the phases of hydrodissection and hydrodelamination/hydrodelineation/hydrodemarcation, comprising:
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a hub portion having a proximal end, a distal end, and a centrally disposed longitudinal axis; a one-piece needle having a straight first section a curved second section, a first end at said first section, and a second end at said second section, said first end being mounted in said distal end of said hub portion with said needle extending forwardly beyond said distal end, said first section being coaxial with said longitudinal axis of said hub, said second section extending away from said longitudinal axis and terminating at said second end without curving inwardly towards said longitudinal axis, and said second end being trucated to define a beveled surface and having a sharpened edge with a rounded tip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A nuclear hydrolysis cannula for use in removing cataracts during the phases of hydrodissection and hydrodelamination/hydrodelineation/hydrodemarcation, comprising:
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a hub portion having a proximal end, a distal end, and a centrally disposed longitudinal axis; a one-piece needle having a straight first section a curved second section, a first end at said first section, and a second end at said second section, said first end being mounted in said distal end of said hub portion with said needle extending forwardly beyond said distal end, said first section being coaxial with said longitudinal axis of said hub, said second section extending away from said longitudinal axis and terminating at said second end without curving inwardly towards said longitudinal axis, said second end being trucated to define a beveled surface and having a sharpened edge with a rounded tip, said first section extending outwardly from said distal end of said hub portion approximately 8.00 mm, said needle from said distal end of said hub portion to said second end having an axial length of approximately 20.00 mm, said second section having a radius of curvature of approximately 19.00 mm, and said second end being disposed a distance of approximately 5.00 mm from said longitudinal axis. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A nuclear hydrolysis cannula for use in removing cataracts during the phases of hydrodissection and hydrodelamination/hydrodelineation/hydrodemarcation, comprising:
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a hub portion having a proximal end, a distal end, and a centrally disposed longitudinal axis; a one-piece needle having a straight first section a curved second section, a first end at said first section, and a second end at said second section, said first end being mounted in said distal end of said hub portion with said needle extending forwardly beyond said distal end, said first section being coaxial with said longitudinal axis of said hub, said second section having a curvature which defines with said first section a concave aspect which is directed away from said longitudinal axis, and said second end being truncated to define a beveled surface and having a sharpened edge with a rounded tip. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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Specification