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Ophthalmic valved trocar cannula

  • US 8,679,064 B2
  • Filed: 08/13/2012
  • Issued: 03/25/2014
  • Est. Priority Date: 12/23/2009
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a cannula configured for insertion into an eye;

    an overcap affixed to the cannula;

    wherein the cannula or the overcap includes at least one tab and wherein the other of the cannula or overcap includes at least one slot, wherein a tab of the at least one tab extends along less than three hundred and sixty degrees of a peripheral of the cannula or the overcap and wherein a slot of the at least one slot terminates in an overlapping portion of the peripheral of the cannula or the overcap that does not include the tab;

    wherein the overcap is affixed to the cannula by the at least one tab being received in the at least one slot;

    wherein the overcap is configured not to rotate relative to the cannula; and

    a seal between the cannula and the overcap, wherein the seal is configured to allow passage of a surgical tool into the cannula through a slit in the seal while inhibiting fluid flow through the seal when the surgical tool is not present in the seal.

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