Illumination cannula system for vitreous surgery
First Claim
1. A cannula system for use in pars plana vitrectomy, said system including a cannula which can be anchored in the pars plana of an eyeball and which includes a working channel suitable for passing active surgical instruments into a vitreous cavity of the eyeball, and an adapter suitable for selectively alternatively utilizing said channel for communicating fluid from an infusion line into said vitreous cavity said cannula comprising:
- a length of tubing having an open upper end, an open lower end, an outside diameter and a hollow interior defining said channel;
a shroud encasing said tubing, said shroud including means by which said cannula can be attached at a sclerotomy to a wall of an eyeball, with said lower end of said tubing inserted into a vitreous cavity of said eyeball; and
a plurality of optical fibers having proximal and distal ends;
said fibers running outside said tubing externally of said working channel and terminating within said shroud, with said proximal ends annularly, angularly spaced about said outside diameter at said lower end of said tubing;
and said adapter comprising;
a length of tubing having an open upper end for communication with an infusion line, an open lower end dimensioned and configured for insertion through said channel of said cannula tubing, and a hollow interior for delivery of infusion fluid from the infusion line into the vitreous cavity; and
mating means for mating said adapter in sealing engagement with said cannula, when said adapter tubing is inserted through said cannula tubing channel, so that said lower end of said adapter tubing protrudes a distance beyond said lower end of said cannula tubing, for delivery of infusion fluid into the vitreous cavity at a discharge point located below said proximal ends of said fibers.
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Accused Products
Abstract
An illumination cannula system for vitreous surgery. The cannula system has a plurality of illuminated cannula ports, each including a multiplicity of optical fibers annularly arranged about a central conduit channel provided with a double seal onto which a sleeve connector or boot of an infusion line adapter or sealing plug can be attached. The adapter includes an extended tube for discharging fluid beyond the terminations of the fibers. The double seal provides a convenient, positive snap-action sealing connection. Identical configurations of the cannula ports enable post-placement selection and interchange of infusion and instrumentation ports.
161 Citations
20 Claims
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1. A cannula system for use in pars plana vitrectomy, said system including a cannula which can be anchored in the pars plana of an eyeball and which includes a working channel suitable for passing active surgical instruments into a vitreous cavity of the eyeball, and an adapter suitable for selectively alternatively utilizing said channel for communicating fluid from an infusion line into said vitreous cavity said cannula comprising:
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a length of tubing having an open upper end, an open lower end, an outside diameter and a hollow interior defining said channel; a shroud encasing said tubing, said shroud including means by which said cannula can be attached at a sclerotomy to a wall of an eyeball, with said lower end of said tubing inserted into a vitreous cavity of said eyeball; and a plurality of optical fibers having proximal and distal ends;
said fibers running outside said tubing externally of said working channel and terminating within said shroud, with said proximal ends annularly, angularly spaced about said outside diameter at said lower end of said tubing;and said adapter comprising; a length of tubing having an open upper end for communication with an infusion line, an open lower end dimensioned and configured for insertion through said channel of said cannula tubing, and a hollow interior for delivery of infusion fluid from the infusion line into the vitreous cavity; and mating means for mating said adapter in sealing engagement with said cannula, when said adapter tubing is inserted through said cannula tubing channel, so that said lower end of said adapter tubing protrudes a distance beyond said lower end of said cannula tubing, for delivery of infusion fluid into the vitreous cavity at a discharge point located below said proximal ends of said fibers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 10)
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8. A cannula system for use in pars plana vitrectomy, said system including a cannula which can be anchored in the pars plana of an eyeball and which includes a working channel suitable for passing active surgical instruments into a vitreous cavity of the eyeball, and an adapter suitable for selectively alternatively utilizing said channel for communicating fluid from an infusion line into said vitreous cavity;
- said cannula comprising;
a length of tubing having an open upper end, an open lower end, an outside diameter and a hollow interior defining said channel; a shroud encasing said tubing, said shroud including means by which said cannula can be attached at a sclerotomy to a wall of an eyeball, with said lower end of said tubing inserted into a vitreous cavity of said eyeball; a plurality of optical fibers having proximal and distal ends;
said fibers running outside said tubing externally of said working channel and terminating within said shroud, with said proximal ends annularly, angularly spaced about said outside diameter at said lower end of said tubing; anda double-seal assembly annularly disposed about said upper end of said tubing; and said adapter comprising; a length of tubing having an open upper end for communication with an infusion line, an open lower end dimensioned and configured for insertion through said channel of said cannula tubing, and a hollow interior for delivery of infusion fluid from the infusion line into the vitreous cavity; and a boot surrounding said adapter tubing and dimensioned, configured and adapted to snap over said double-seal assembly for sealing said cannula tubing upper end about said adapter tubing. - View Dependent Claims (9, 11, 12, 13)
- said cannula comprising;
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14. A cannula system for use in pars plana vitrectomy, said system including a cannula which can be anchored in the pars plana of an eyeball and which includes a working channel suitable for passing active surgical instruments into a vitreous cavity of the eyeball, and an adapter suitable for selectively alternatively utilizing said channel for communicating fluid from an infusion line into said vitreous cavity;
- said cannula comprising;
a length of tubing having an open upper end, an open lower end, an outside diameter and a hollow interior defining said channel; a shroud encasing said tubing, said shroud including means by which said cannula can be attached at a sclerotomy to a wall of an eyeball, with said lower probe end of said tubing inserted into a vitreous cavity of said eyeball; a plurality of optical fibers having proximal and distal ends;
said fibers running outside said tubing externally of said working channel and terminating within said shroud, with said proximal ends annularly, angularly spaced about said outside diameter at said lower end of said tubing; andself-closing valve means located within said channel for preventing escape of fluid from the vitreous cavity when said channel is unoccupied. - View Dependent Claims (15, 16, 17, 18, 19, 20)
- said cannula comprising;
Specification