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Phacoemulsification irrigation sleeve with cheek

A phacoemulsification and sleeve technology, which is used in hypodermic injection devices, ophthalmic surgery, suction devices, etc., and can solve problems such as lens capsule tearing and eye collapse.

Inactive Publication Date: 2011-12-14
ALCON RES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This post-occlusion surge can in some cases cause a relatively large amount of fluid and tissue to be sucked out of the eye too quickly, potentially causing the eye to collapse and / or causing the lens capsule to tear

Method used

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  • Phacoemulsification irrigation sleeve with cheek
  • Phacoemulsification irrigation sleeve with cheek
  • Phacoemulsification irrigation sleeve with cheek

Examples

Experimental program
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Embodiment Construction

[0022] As noted above, embodiments of the present invention include a phacoemulsification sleeve having additional slits in addition to the holes or other outlets normally used to allow perfusate to flow into the anterior chamber of the eye Or "the gills." One function of these slit perfusion orifices is to transiently increase the maximum perfusion flow in response to the loss of pressure in the anterior chamber of the eye caused by the post-occlusion surge. The temporarily increased perfusion flow provided by the slotted perfusion orifice compensates for the loss of pressure and minimizes the loss of fluid volume in the antechamber.

[0023] With properly designed slits or gills, when a sudden pressure drop in the anterior chamber of the eye draws the maximum amount of fluid from the common irrigation orifice in the irrigation sleeve, the gills will open, unfolding to allow more flow . This additional flow is supplied quickly in response to temporarily increased demand, an...

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PUM

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Abstract

A phacoemulsification irrigation sleeve includes an elongated, resilient, tubular body section configured to surround a portion of a shaft of a phacoemulsification needle, the tubular body section having a distal end and a proximal end, and an inner surface and an outer surface. An enlarged section formed on the proximal end of the tubular body portion surrounds a hub of the phacoemulsification needle and connects the irrigation sleeve to a phacoemulsification handpiece. The irrigation sleeve further comprises at least one slitted irrigation port formed adjacent to the distal end of the body section and configured to splay in response to a drop in pressure between the inner surface and the outer surface.

Description

technical field [0001] The present invention relates generally to phacoemulsification devices for use in ophthalmic surgery, and more particularly to phacoemulsification irrigation sleeves. Background technique [0002] The human eye is used to provide vision by transmitting light through a transparent outer part called the cornea and focusing the image onto the retina by means of a lens. The quality of the focused image depends on many factors, including the size and shape of the eye, and the transparency of the cornea and lens. When age or disease causes the lens to become less transparent, vision decreases because less light can be transmitted to the retina. This defect in the lens of the eye is medically known as a cataract. One acceptable treatment for this condition is surgical removal of the lens and replacement of the lens function with an intraocular lens (IOL). [0003] In the United States, most cataractous lenses are removed through a surgical technique called...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F9/007A61M1/00
CPCA61F9/00736A61M1/008A61M1/84
Inventor 小拉曼·C·迪马兰塔G·C·廖
Owner ALCON RES LTD
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