Ophthalmic Cannula
First Claim
1. A cannula for use in penetration into the eyeball,having a cylindrical body penetrating the eyeball wall during use, wherein the tip portion of the cylindrical body is the tip portion of the cannula, whereinat least the tip portion of the cylindrical body is closed by a membrane made of a polymer material having elasticity and flexibility.
1 Assignment
0 Petitions
Accused Products
Abstract
A configuration wherein the tip portion 1a of the cylindrical body 1, which constitutes the main body of the cannula, is closed with the membrane 2 made of a polymer material having elasticity and flexibility. Preferably, the cylindrical body 1 and the membrane 2 are integrally molded with the same membrane material. Thereby, the fluids in the eyeball are prevented from coming off through the cannula even when an instrument is removed. Also, provided that the cylindrical body 1 is made to have a partially swollen fusiform shape, a curved-tip instrument can be inserted. Also, provided that a projection is provided on the outer face of the cylindrical body, the cannula is prevented from coming off from the eyeball during surgery is prevented.
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Citations
9 Claims
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1. A cannula for use in penetration into the eyeball,
having a cylindrical body penetrating the eyeball wall during use, wherein the tip portion of the cylindrical body is the tip portion of the cannula, wherein at least the tip portion of the cylindrical body is closed by a membrane made of a polymer material having elasticity and flexibility.
Specification