Ophthalmic valved trocar cannula
First Claim
1. An apparatus, comprising:
- a single-piece cannula configured for insertion into an eye, wherein the cannula includes at least two tabs;
an overcap affixed to the cannula, wherein the overcap is configured not to rotate relative to the cannula, wherein the overcap includes at least two slots and wherein the overcap is affixed to the cannula by receiving the at least two tabs in the corresponding at least two slots; 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;
wherein the seal is overmolded into a depression in the overcap; and
wherein the seal is molded into at least two holes in the overcap.
4 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).
468 Citations
15 Claims
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1. An apparatus, comprising:
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a single-piece cannula configured for insertion into an eye, wherein the cannula includes at least two tabs; an overcap affixed to the cannula, wherein the overcap is configured not to rotate relative to the cannula, wherein the overcap includes at least two slots and wherein the overcap is affixed to the cannula by receiving the at least two tabs in the corresponding at least two slots; 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; wherein the seal is overmolded into a depression in the overcap; and wherein the seal is molded into at least two holes in the overcap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification