Capsulotomy device

A technology of capsulotomy and cutting elements, which is applied in the field of tissue microsurgery, and can solve the problems of difficult manipulation of instruments, tearing and damage at the incision site, etc.

A technology of capsulotomy and cutting elements, which is applied in the field of tissue microsurgery, and can solve the problems of difficult manipulation of instruments, tearing and damage at the incision site, etc.

CN104010601AActive Publication Date: 2014-08-27セントリシティビジョンインコーポレイテッド
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Experimental program
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Embodiment approach

[0138] As is current practice, cataract surgery is accomplished by filling the anterior chamber with a "viscoelastic material". Viscoelastic materials are materials that behave as elastic solids on short time scales and flow as viscous fluids on long time scales. Therefore, if it is timed as a short pulse that coincides with the discharge, the suction force can be greatly increased. The mechanical movement of the capsular membrane at the electrodes can be small (eg 0.005mm-0.05mm). The suction force is limited by cavitation, but cavitation takes time to develop, and the timing of the pulses is too short (eg, less than 0.010 seconds). So, according to one embodiment of the invention, the order of usage would be:

[0139] 1. Apply low level suction to establish a seal of the suction cup against the lens.

[0140] 2. Start high puff pulse (mechanical pulse will be slower than discharge).

[0141] 3. At the peak of the puff, discharge an electrical pulse.

[0142] 4. Switch o...

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Abstract

A surgical device and procedure for accessing tissue to perform microsurgery, including a capsulotomy of a lens capsule of an eye. The device includes a handpiece with a tip for insertion into an incision. A sliding element is disposed within the handpiece and a suction cup is mounted to the sliding element. The sliding element can be translated to move the suction cup into and out of the handpiece. A compression mechanism associated with the suction cup and the handpiece compresses the suction cup for deployment through the tip of the handpiece. The suction cup can expand inside the anterior chamber into a cutting position. A cutting element mounted to the suction cup is used to cut a portion and to remove the portion. The cutting element may be mounted to a cutting element support structure in a way that prevents heating of the device.

Description

[0001] Inventor: CHRISTOPHER GUILD KELLER [0002] Cross References to Related Applications [0003] This application claims the benefit of US Provisional Patent Application No. 61 / 550,111, filed October 21, 2011, the disclosure of which is incorporated herein by reference. technical field [0004] The present invention relates generally to tissue microsurgery, and more particularly to procedures and devices for accessing tissue through another tissue layer to cut or otherwise manipulate tissue. For example, the procedures and devices may be used to deliver ophthalmic surgical devices through the cornea to the anterior lens capsule membrane in the anterior chamber of the eye. Background technique [0005] Lens cataracts are a leading cause of blindness worldwide, and surgical treatment by cataract removal is the treatment of choice. A cataract is a cloud that forms within the lens of the eye or its enclosure. The formation of opaque areas within the lens blocks light fro...

Claims

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Application Information

Patent Timeline
27 Aug 2014
Publication
CN104010601A
IPC
A61F9/007
CPC
A61B18/1402; A61B2018/00291; A61B2018/1407; A61B18/14; A61B2018/00321; A61B2018/00601; A61F9/00754; A61F9/0017
Inventors
C·G·科勒