PRECISION ORIFICE SAFETY DEVICE
First Claim
1. A safety device in a fluid vent conduit for reducing vacuum level in an aspiration conduit of an ophthalmic surgical system, the device comprising:
- an orifice having an inlet for receiving a flow of fluid from an irrigation source;
wherein the orifice further has an outlet for directing the flow of fluid into the aspiration conduit;
wherein the orifice has a cross-sectional area sufficiently large to ensure an acceptable amount of fluid flows into the aspiration conduit, to reduce the vacuum level in the aspiration conduit, to an acceptable level in an acceptable amount of time and to provide adequate reflux; and
wherein the cross-section area is sufficiently small to restrict the flow of fluid to allow enough fluid to continue to flow from the irrigation source to a hand piece at a surgical site.
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Accused Products
Abstract
A safety device in a fluid vent conduit for reducing vacuum level in an aspiration conduit of an ophthalmic surgical system. The device includes an orifice having an inlet for receiving a flow of fluid from an irrigation source. The orifice further has an outlet for directing the flow of fluid into the aspiration conduit. The orifice has a cross-sectional area sufficiently large to ensure an acceptable amount of fluid flows into the aspiration conduit, to reduce the vacuum level in the aspiration conduit, to an acceptable level in an acceptable amount of time and to provide adequate reflux. The cross-section area is sufficiently small to restrict the flow of fluid to allow enough fluid to continue to flow from the irrigation source to a handpiece at a surgical site.
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Citations
16 Claims
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1. A safety device in a fluid vent conduit for reducing vacuum level in an aspiration conduit of an ophthalmic surgical system, the device comprising:
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an orifice having an inlet for receiving a flow of fluid from an irrigation source; wherein the orifice further has an outlet for directing the flow of fluid into the aspiration conduit; wherein the orifice has a cross-sectional area sufficiently large to ensure an acceptable amount of fluid flows into the aspiration conduit, to reduce the vacuum level in the aspiration conduit, to an acceptable level in an acceptable amount of time and to provide adequate reflux; and wherein the cross-section area is sufficiently small to restrict the flow of fluid to allow enough fluid to continue to flow from the irrigation source to a hand piece at a surgical site. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An ophthalmic surgical pump cassette for collecting aspirant fluid and tissue from a patient'"'"'s eye comprising:
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an aspiration manifold formed on the cassette for connecting an aspiration conduit from a surgical handpiece to the cassette and for allowing valves of a surgical console to control a flow of aspirant fluid and tissue into the cassette; an irrigation manifold formed on the cassette for connecting an irrigation conduit from a surgical handpiece to a source of irrigation fluid and for connecting a fluid vent conduit between the aspiration manifold and the irrigation manifold, the irrigation manifold also allowing valves of the surgical console to control a flow of irrigation fluid from the source to the handpiece and between the irrigation manifold and the aspiration manifold; and an orifice formed within the fluid vent conduit or the aspiration manifold, the orifice having a cross-sectional area sufficiently large to ensure an acceptable amount of fluid flows into the aspiration manifold to reduce a vacuum level in the aspiration conduit, to an acceptable level in an acceptable amount of time, and to provide adequate reflux, wherein the cross-sectional area is sufficiently small to restrict the flow of irrigation fluid to the aspiration manifold to allow enough irrigation fluid to continue to flow to the handpiece and into the patient'"'"'s eye. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A surgical system for aspiration of a biological material comprising:
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a handpiece applied to a surgical area for infusing irrigation fluid and for aspirating a biological material; a source of irrigation fluid; a collection cassette; a pump for creating a vacuum in the collection cassette; an irrigation conduit connecting the handpiece to the source of irrigation fluid; an aspiration conduit connecting the handpiece to the collection cassette; a fluid vent conduit of which one end is connected to the irrigation conduit and the other end is connected to the aspiration conduit; and a safety device of formed within the fluid vent conduit or a junction of the fluid vent conduit and the aspiration conduit to provide improved fluid control. - View Dependent Claims (14, 15, 16)
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Specification