INTRAOCULAR IRRIGATOR-ASPIRATOR TIP COMPONENT

摘要

An ophthalmic irrigator-aspirator has a handpiece with aspiration and irrigation openings through its distal end. A tip component connects to the handpiece and has an aspiration cannula. A flexible sleeve has an annular hub for watertight connection to the handpiece or a base portion of the tip. The sleeve has an intermediate portion that forms a channel for an irrigation fluid along the exterior of the cannula to an irrigation port in the sleeve. The distal end portion of the sleeve is sized for a watertight connection over the distal portion of the cannula. Such distal end portion of the sleeve has an aspiration port in communication with the cannula aspiration port. The sleeve proximate, intermediate, and distal portions are integral with each other and are formed of a resilient material that allows the sleeve to be tightly fitted on the handpiece or tip base portion and the cannula.

主权项

1. An ophthalmic irrigator-aspirator instrument comprising:
a handpiece with proximate and distal ends, the handpiece having an aspiration opening through the distal end thereof and one or more irrigation openings adjacent to the aspiration opening; a tip component having: a proximate base portion constructed and arranged to be manually connected to a distal end portion of the handpiece in a watertight fit and surrounding the aspiration and irrigation openings of the handpiece, the base portion having irrigation openings therethrough in communication with the handpiece irrigation openings; an elongated cannula having a proximate end portion joined to the base portion, a distal end portion, and a bend between the proximate and distal end portions and adjacent to a distal end of the cannula, the cannula having an internal bore communicating with the handpiece aspiration opening and an aspiration port at or adjacent to the distal end of the cannula spaced in a distal direction from the bend; and a sleeve component having: a proximate annular hub portion constructed and arranged to be manually connected to a distal end portion of the tip component base portion in a watertight fit; an intermediate portion surrounding the elongated tip of the instrument and forming an irrigation channel between the tip base portion and an interior portion of the sleeve which channel is in communication with the handpiece irrigation opening, the intermediate sleeve portion having a bend overlying the bend of the cannula, an irrigation port adjacent to a distal end of the sleeve and located at least partially distal to the bend of the elongated tip for ejection of an irrigation fluid therefrom; and a distal end portion sized for connection over a distal portion of the cannula in a watertight fit at a location distal of the sleeve irrigation port but proximate of the cannula aspiration port, the sleeve distal end portion having an aspiration port located to be in communication with the cannula aspiration port when the sleeve is stretched over the distal portion of the cannula, the sleeve proximate, intermediate, and distal portions being integral with each other and formed of a resilient material that allows the sleeve to be stretched onto the handpiece and tip.