IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0492729
(2000-01-27)
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발명자
/ 주소 |
- Loomas, Bryan
- Davenport, James
- Mathis, Mark
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출원인 / 주소 |
- Addition Technology, Inc.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
13 인용 특허 :
23 |
초록
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This invention is a surgical device for producing a generally circular, interlamellar pathway within the corneal stroma of the eye. The device is made up of three major components: a vacuum centering guide having an inner bore which fits at one end against the front of the eye, a barrel which fits w
This invention is a surgical device for producing a generally circular, interlamellar pathway within the corneal stroma of the eye. The device is made up of three major components: a vacuum centering guide having an inner bore which fits at one end against the front of the eye, a barrel which fits within the inner bore of the centering guide and to which is attached the third major component, a generally circular dissecting ring. The dissecting ring is shaped in such way that when an eye surgeon twists the barrel to which the ring is attached, the ring moves through the interlamellar space in the stroma producing the desired channel or pathway. The centering guide may optionally include a ring having one or more pins which firmly engage the cornea's epiphilium. The constituent parts of the surgical device, particularly the dissecting ring, also form a part of this invention. A split ring, or intracorneal ring ("ICR"), is inserted into the intrastromal passageway produced by the inventive device. The ICR changes the shape of the cornea and, in doing so, provides a chosen measure of visual correction.
대표청구항
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1. A dissector blade assembly for forming space in the cornea of an eye comprising: a blade having a dissecting end, a support end, a cross-section, and an outer boundary being in the form of a major arc in a plane substantially perpendicular to a rotational axis; and a support arm having a firs
1. A dissector blade assembly for forming space in the cornea of an eye comprising: a blade having a dissecting end, a support end, a cross-section, and an outer boundary being in the form of a major arc in a plane substantially perpendicular to a rotational axis; and a support arm having a first end and a second end, said first end of said support arm being attached to said support end of said blade wherein said major arc subtends an angle up to about 350 degrees. 2. A dissector blade assembly for forming space in the cornea of an eye comprising: a blade having a dissecting end, a support end, a cross-section, and an outer boundary being in the form of a major arc in a plane substantially perpendicular to a rotational axis; and a support arm having a first end and a second end, said first end of said support arm being attached to said support end of said blade wherein said support arm and said plane are at an angle of 34 (+/-5) degrees. 3. The assembly of claim 2 wherein said cross-section is positioned such that it forms a section of a cone having an angle of 112 (+/-30) degrees. 4. A dissector blade assembly for forming space in the cornea of an eye comprising: a blade having a dissecting end, a support end, a cross-section, and an outer boundary being in the form of a major arc in a plane substantially perpendicular to a rotational axis; and a support arm having a first end and a second end, said first end of said support arm being attached to said support end of said blade, said dissector blade assembly further comprising a generally cylindrical barrel member attached to said second end of said support wherein said barrel member is tubular and has an inner diameter and an outer diameter, said inner diameter being smaller than a diameter of said outer boundary of said blade. 5. A surgical system for forming space in the cornea, said system comprising a first and a second dissector assembly wherein each dissector assembly comprises: a blade having a dissecting end, a support end, a cross-section, and an outer boundary being in the form of a major arc in a plane substantially perpendicular to a rotational axis; and a support arm having a first end and a second end, said first end of said support arm being attached to said support end of said blade with said blade of the first dissector assembly extending in a first direction and said blade of second dissector assembly extending in a second direction counter to said first direction. 6. A surgical system for use in forming space in the cornea, said system comprising a first and a second dissector assembly wherein each dissector assembly comprises: a blade having a dissecting end, a support end, a cross-section, and an outer boundary being in the form of a major arc in a plane substantially perpendicular to a rotational axis; and a support arm having a first end and a second end, said first end of said support arm being attached to said support end of said blade, said dissector blade assembly further comprising a generally cylindrical barrel member attached to said second end of said support with said blade of the first dissector assembly extending in a first direction and said blade of the second dissector assembly extending in a second direction counter to said first direction. 7. The surgical system of claim 6 further comprising a support base adapted to be affixable to an eye, said support base having a vacuum portion and a guide portion with a central axis, said guide portion being adapted to slidingly receive said barrel of each dissector assembly and maintain said rotational axis of each dissector assembly substantially coincident with said central axis of said guide portion.
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