Device for cutting and aspirating tissue
First Claim
1. A device for cutting and aspirating tissue from the human or animal body, said device having a longitudinal axis and comprising:
- an outer tube (1); and
an inner tube (2) arranged concentrically inside the outer tube (1), with little play, in a manner allowing sliding back and forth,wherein;
the outer tube (1) is closed on the free end thereof, and has at least one lateral opening (8), the same having at least one inner cutting edge (5) close to the free end,the inner tube (2) is open on the free end thereof, and has an outer cutting edge (4),the cutting edges (4, 5) work together by cutting when the inner tube (2) slides with respect to the outer tube (1), with a shaping measure performed at least one of in or on the inner tube (2),the inner tube (2) runs in the outer tube (1) with at least a small amount of pre-tensioning, at least in the region of the lateral opening (3),the inner tube (2) is at least one of bent or is given a bending with respect to the longitudinal axis in such a manner that the cutting edges pass by each other under at least a small amount of pre-tensioning when the inner tube (2) glides back and forth in the outer tube (1), andthe inner tube (2) has two bendings (10, 11) each oriented in a different direction, such that an outer wall of the inner tube (2) and an inner wall of the outer tube (1) are oriented at least nearly parallel relative to one other and the longitudinal axis, at least in a frontal region of the device adjacent the free ends of the inner and outer tubes (1, 2).
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a device for cutting and aspirating tissue from the human or animal body, in particular for use in vitrectomy, epiretinal membrane peeling, etc., with an outer tube (1), and with an inner tube (2) which is movable to and fro and concentrically in the outer tube (1) with slight play, wherein the outer tube (1) is closed at the free end and has, near the free end, at least one lateral opening (3) with at least one inner cutting edge (5), wherein the inner tube (2) is open at the free end and there has an outer cutting edge (4), and wherein the cutting edges cooperate in a cutting action during the movement of the inner tube (2) relative to the outer tube (1), advantageously characterized by a shaping measure in or on the outer tube (1) and/or in or on the inner tube (2), whereby the inner tube (2), at least in the area of the lateral opening (3), runs in the outer tube (1) with at least slight pretensioning.
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Citations
18 Claims
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1. A device for cutting and aspirating tissue from the human or animal body, said device having a longitudinal axis and comprising:
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an outer tube (1); and an inner tube (2) arranged concentrically inside the outer tube (1), with little play, in a manner allowing sliding back and forth, wherein; the outer tube (1) is closed on the free end thereof, and has at least one lateral opening (8), the same having at least one inner cutting edge (5) close to the free end, the inner tube (2) is open on the free end thereof, and has an outer cutting edge (4), the cutting edges (4, 5) work together by cutting when the inner tube (2) slides with respect to the outer tube (1), with a shaping measure performed at least one of in or on the inner tube (2), the inner tube (2) runs in the outer tube (1) with at least a small amount of pre-tensioning, at least in the region of the lateral opening (3), the inner tube (2) is at least one of bent or is given a bending with respect to the longitudinal axis in such a manner that the cutting edges pass by each other under at least a small amount of pre-tensioning when the inner tube (2) glides back and forth in the outer tube (1), and the inner tube (2) has two bendings (10, 11) each oriented in a different direction, such that an outer wall of the inner tube (2) and an inner wall of the outer tube (1) are oriented at least nearly parallel relative to one other and the longitudinal axis, at least in a frontal region of the device adjacent the free ends of the inner and outer tubes (1, 2). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification