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PRECISION ORIFICE SAFETY DEVICE

  • US 20100030134A1
  • Filed: 07/29/2008
  • Published: 02/04/2010
  • Est. Priority Date: 07/29/2008
  • Status: Abandoned Application
First Claim
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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:

  • 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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