Device for use in ophthalmologic procedures
First Claim
1. A device for use in ophthalmologic surgery for suctioning, cutting and removing portions of the vitreous humor and/or tissue particles, comprising:
- a housing defining a longitudinal axis;
a guide tube disposed at the housing for insertion into a hollow space of the vitreous humor, said guide tube having a distal end forming a suction opening;
an inner tube received coaxially in the guide tube;
a drive; and
a control member operatively connected with the drive, and receiving the inner tube, for moving the inner tube in the direction of the longitudinal axis between a resting position in which the suction opening of the guide tube is cleared to allow withdrawing the vitreous humor and/or tissue particles and a closing position in which the suction opening is sealed, said control member being configured to allow a movement of the inner tube in the guide tube in the direction of the longitudinal axis from the resting position to the closing position and back to the resting position by translating a rotational movement of the drive into a linear movement of the inner tube, and to refrain from acting on the inner tube at rotational movement of the drive when the inner tube is in the resting position.
3 Assignments
0 Petitions
Accused Products
Abstract
A cutting device for ophthalmologic surgery in the eye of a living being specifically for suctioning, cutting and removing portions of the vitreous humor of the eye and/or tissue particles, includes a housing and a probe disposed thereon for insertion into the vitreous humor with the probe including a guide tube with a suction opening at its distal end and an inner tube co-axially inserted therein which is slideably movable in axial direction relative to the suction opening, and a control member configured to translate a rotational movement of the drive into a linear movement of the inner tube to thereby move the inner tube in the guide tube in the direction of the longitudinal axis from the resting position to the closing position and back to the resting position while preventing a linear movement of the inner tube at rotating drive when the inner tube is in the resting position.
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Citations
22 Claims
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1. A device for use in ophthalmologic surgery for suctioning, cutting and removing portions of the vitreous humor and/or tissue particles, comprising:
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a housing defining a longitudinal axis;
a guide tube disposed at the housing for insertion into a hollow space of the vitreous humor, said guide tube having a distal end forming a suction opening;
an inner tube received coaxially in the guide tube;
a drive; and
a control member operatively connected with the drive, and receiving the inner tube, for moving the inner tube in the direction of the longitudinal axis between a resting position in which the suction opening of the guide tube is cleared to allow withdrawing the vitreous humor and/or tissue particles and a closing position in which the suction opening is sealed, said control member being configured to allow a movement of the inner tube in the guide tube in the direction of the longitudinal axis from the resting position to the closing position and back to the resting position by translating a rotational movement of the drive into a linear movement of the inner tube, and to refrain from acting on the inner tube at rotational movement of the drive when the inner tube is in the resting position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
a) in a first rotation phase about a rotation angle between approximately 0° - to 90°
, the control member remains idle so that the inner tube is stationary at a distance to the suction opening;
b) in a second rotation phase about a rotation angle from 90°
to 180°
, the control member is moved with the inner tube in axial direction in the closing position;
c) in a third rotation phase about a rotation angle from 180°
to 270°
, the control member returns with the inner tube to the starting position to clear the suction opening;
d) in a fourth rotation phase about a rotation angle from 270°
to 360°
, the control member remains in the starting position in which the inner tube is positioned at a distance to the suction opening.
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16. The device of claim 15, and further comprising a rotation sensor which is operatively connected to the drive to control a movement pattern of the inner tube relative to the suction opening in correspondence with the rotation phases.
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17. The device of claim 16, wherein the movement pattern of the inner tube is so controllable by the rotation sensor and the drive that the inner tube is retainable in the resting position in which the suction opening is cleared.
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18. The device of claim 2, wherein the control member has an end face distal to the rotation body, and a recess extending inwardly in axial direction from the end face for receiving the coupling element.
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19. The device of claim 18, wherein the coupling member has a plate, said control member provided with a groove arranged at a distance to the end face and extending transversely to a longitudinal extension of the recess for positive engagement of the plate.
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20. The device of claim 18, wherein the coupling member is provided with a connection piece projecting into the recess of the control member for attachment of an aspiration line.
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21. The device of claim 1, wherein the inner tube is in the resting position for a time period which is at least as long as a time period for the inner tube to move from the resting position to the closing position and back to the resting position.
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22. The device of claim 1 wherein the drive is an electric motor.
Specification