TISSUE REMOVAL DEVICES, SYSTEMS AND METHODS
First Claim
1. A tissue removal device, comprising:
- a cannula for aspirating tissue; and
a hermetically sealed fluid regulator in fluid communication with the cannula.
2 Assignments
0 Petitions
Accused Products
Abstract
A tissue removal device includes a cannula that can aspirate tissue under a vacuum applied in the cannula, and a hermetically sealed fluid regulator in fluid communication with the cannula that generates vacuum pulses according to a controllable pulse rate and flow rate. The tissue removal device may also have a vacuum conduit having two or more conduit sections where the inner diameter of an upstream conduit section is smaller than the inner diameter of a succeeding conduit section. A device is also provided for applying an elastic membrane to an open end of the cannula to allow a user to remove any remaining cortical material after cataract material has first been removed from the eye by vacuum pressure applied in the cannula.
38 Citations
37 Claims
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1. A tissue removal device, comprising:
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a cannula for aspirating tissue; and a hermetically sealed fluid regulator in fluid communication with the cannula. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A tissue removal device, comprising:
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a cannula for aspirating tissue; and a vacuum conduit having two or more interconnecting conduit sections in fluid communication with the cannula, wherein the inner diameter of an upstream conduit section is smaller than the inner diameter of a succeeding conduit section. - View Dependent Claims (8, 9, 10)
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11. A tissue removal device, comprising:
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an end cap carrying a cannula for aspirating tissue; an actuator mechanically coupled to a fluid regulator disposed within the end cap, wherein the fluid regulator is in fluid communication with the cannula; a housing coupled between the end cap and the actuator; and a vacuum conduit extending through the end cap and the housing, wherein the conduit is configured to be coupled between the cannula and a device for applying vacuum. - View Dependent Claims (12, 13)
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14. A tissue removal device, comprising:
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a handpiece enclosing a handpiece interior and having a proximal handpiece opening and a distal handpiece opening; a vacuum conduit extending from the proximal handpiece opening and through the handpiece interior and the distal handpiece opening, and terminating at an open distal conduit end disposed outside the handpiece at a distance from the distal handpiece opening; a hermetically sealed valve mechanism communicating with the vacuum conduit and configured to control flow rate and volume in the vacuum conduit; and a linear actuator coupled to the rotary valve to open and close the rotary valve. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for removing tissue from an eye, the method comprising:
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inserting a distal tip of a vacuum conduit of a tissue removal device through an incision formed in the eye and into an interior of the eye; breaking up tissue in the interior by applying a series of vacuum pulses to the tissue via the vacuum conduit, wherein applying the vacuum pulses includes actuating a valve mechanism communicating with a section of the vacuum conduit alternately between an open state and a closed state; aspirating the broken-up tissue through the vacuum conduit to a receiving site disposed remotely from the tissue removal device; removing the distal tip from the incision formed in the eye; applying a flexible membrane having at least one side port to an open end of the distal tip, where the at least one side port is in fluid communication with the vacuum conduit; re-inserting the distal tip through an incision formed in the eye and into an interior of the eye; and breaking up any remaining tissue in the interior by applying a series of vacuum pulses to the tissue via the vacuum conduit. - View Dependent Claims (26, 27, 28, 29, 30)
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31. A device for removing cortical material from the eye, the device comprising:
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a cannula for aspirating cortical material; an elastic membrane having at least one side port, where the membrane is adhered to a distal end of the cannula; and a vacuum conduit in fluid communication with the at least one side port. - View Dependent Claims (32)
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33. A method for performing eye surgery, the method comprising:
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inserting a distal tip of a cannula of a handheld surgical device through an incision formed in the eye and into an anterior capsule of the eye; breaking up cataract material in the lens capsule by applying a series of vacuum pulses to the cataract material via the cannula, wherein applying the vacuum pulses includes actuating a valve mechanism communicating with a vacuum conduit alternately between an open state and a closed state, while the vacuum conduit fluidly communicates with the cannula; aspirating the broken-up tissue through the cannula and the vacuum conduit to a receiving site disposed remotely from the handheld surgical device; removing the distal tip from the incision formed in the eye; applying a flexible membrane having at least one side port to an open end of the distal tip, where the at least one side port is in fluid communication with the vacuum conduit; re-inserting the distal tip through an incision formed in the eye and into an interior of the eye, breaking up any remaining cortical material in the posterior capsule by applying a series of vacuum pulses to the cortical material via the at least one side port.
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34. A device for applying an elastic membrane to a distal end of a cannula, the device comprising:
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an enclosure having a top surface, an interior, and a canal extending from the top surface into the interior; and at least one support member disposed in the interior, where the at least one support member supports the elastic membrane in vertical aligmnent with the canal. - View Dependent Claims (35, 36, 37)
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Specification