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 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 surgical tools into the cannula through a slit in the seal while inhibiting fluid flow through the seal when a surgical tool is not present in the seal.
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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
18 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 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 surgical tools into the cannula through a slit in the seal while inhibiting fluid flow through the seal when a surgical tool is not present in the seal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 16, 17, 18)
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9. An apparatus, comprising:
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a handle; a trocar blade coupled to the handle; a trocar cannula affixed to an overcap that comprises a seal molded onto the overcap, wherein the seal includes a slit configured to receive the trocar blade therethrough, wherein the trocar blade is configured to pierce an eye to push the cannula into the eye; wherein the overcap is configured not to rotate relative to the cannula; wherein the seal is configured to allow passage of surgical tools into the cannula through a slit in the seal while inhibiting fluid flow through the seal when a surgical tool is not present in the seal; and wherein the handle further comprises a guide and wherein the overcap further comprises a guide slot, wherein the guide slot is configured to receive the guide from the handle and wherein interaction between the guide slot and the guide inhibit rotation of the overcap relative to the handle during insertion of the cannula into an eye. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method, comprising:
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forming an overcap; forming a cannula; securing a seal to the overcap; affixing the overcap to the cannula.
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Specification