Ophthalmic valved trocar cannula
First Claim
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.
3 Assignments
0 Petitions
Accused Products
Abstract
In various embodiments, a trocar cannula may be configured for insertion into an eye to facilitate insertion and removal of instruments during surgery. The cannula may be affixed to an overcap (to inhibit rotation of the overcap relative to the cannula) that includes a seal. In some embodiments, the seal may be overmolded into the overcap or may include a wafer that is fixed between the cannula and the overcap to inhibit rotation relative to the cannula and the overcap. In some embodiments, the cannula and overcap may snap together through a tab/slot interface in a permanent fashion such that the cannula and overcap may not be separated without damaging the cannula or overcap. In some embodiments, a vent cannula may be receivable in the slit of the seal for allowing fluids to vent from the eye through the cannula (which may include an indentation to frictionally engage the vent).
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Citations
8 Claims
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1. An apparatus, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification