Capsularhexis device with flexible heating element

A resistive heating element, superelastic technology, applied in the field of cataract surgery, can solve the problems of increasing operation length and complexity, vitreous loss, etc.

Active Publication Date: 2011-09-07
ALCON INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Any of these complications will likely increase the length an

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  • Capsularhexis device with flexible heating element
  • Capsularhexis device with flexible heating element
  • Capsularhexis device with flexible heating element

Examples

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Embodiment Construction

[0020] Various embodiments of the present invention provide devices and corresponding methods for operating a capsulorhexis. In particular, the present invention relates to a surgical instrument known as a capsulorhexis device that can be positioned within the anterior chamber of the eye through a small incision to perform a capsulorhexis or capsulotomy. This procedure facilitates phacoemulsification of cataract lenses and insertion of artificial intraocular lenses (IOLs).

[0021] US Patent Application Publication No. 2006 / 010061 describes a capsulhexis device comprising a circular and flexible ring made of elastomeric or acrylate or thermoplastic material. Embedded within each of the various embodiments of the flexible ring is a resistive heating element or a pair of bipolar electrodes, powered according to known techniques to generate localized heating on the anterior capsule, thereby defining a weakened boundary so that the circular The part of the capsule inside the ring...

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Abstract

A capsularhexis device (10) comprises a resistive-heating element (12) formed from an electrically resistive, superelastic wire (14) formed into a loop. A bare surface of this loop is applied to the anterior capsule and electrically heated to define a rhexis boundary, such that a smooth circular or oval capsule portion may be removed. In some embodiments, the superelastic wire is formed to include a loop, so that first and second ends of the wire are adjacent to one another and extend away from the loop to form a lead section. An electrically insulating material (17) may completely or partly surround the first and second ends of the wire so that the first and second ends of the superelastic wire are electrically separated. A handle (19) engages at least a portion of the lead section so that the loop-shaped heating element may be moved in and out of the anterior chamber.

Description

technical field [0001] The present invention relates generally to the field of cataract surgery, and more particularly to methods and devices for the operation of capsulorhexis. Background technique [0002] One acceptable treatment for cataract treatment is surgical removal of the lens and replacement of the lens function with an artificial intraocular lens (IOL). In the United States, most cataractous lenses are removed through a surgical technique called phacoemulsification. Before the cataractous lens can be removed, an opening, or tear, must be made in the anterior capsule. During phacoemulsification, when the lens nucleus is emulsified, there is a great deal of tension on the incision edge of the anterior capsule tear. Therefore, continuous incisions or fissures (slits) without "slices" are a critical step in a safe and effective phacoemulsification procedure. [0003] If the capsule is opened with many small capsular slits, the remaining small fragments can lead to...

Claims

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Application Information

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IPC IPC(8): A61F9/007A61B18/08
CPCA61F9/00754A61B18/10A61B2018/00642A61B18/08A61F9/007A61F9/00745
Inventor 光耀佳G·R·萨斯曼
Owner ALCON INC
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