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A tissue and cutting edge technology, used in endoscopic cutting instruments, ophthalmic surgery, etc., can solve problems such as negative effects on the healing process, inability to achieve quantitative flow of suctioned liquid and separated tissue, and eye irritation.
Active Publication Date: 2020-03-06
GEUDER AG
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[0006] An additional problem is that such devices do not allow a quantitative flow of aspirated fluid and separated tissue during movement of the inner tube
This results in alternating negative pressure in the body or in the eye (even if only at a low level), which can lead to irritation of the eye, negatively affecting the healing process
Method used
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[0024] Figure 1 to Figure 9 A much enlarged schematic view is shown of the working area of a device according to the invention, a so-called vitrectomy device for vitrectomy, ie a device for removing the vitreous from the human eye.
[0025] Figure 1 to Figure 9 Together the movement of the movable parts and the position of the respective movable parts relative to each other are shown.
[0026] Figure 1 to Figure 9 An outer tube 1 with a closed free end 2 is partially and specifically shown. exist Figure 1 to Figure 9 In the shown embodiment, the outer tube has a first opening 3 and a second opening 4 . The first opening 3 and the second opening 4 are each formed in an asymmetric ellipse or an asymmetric oval. It is thus clearly recognizable that the asymmetrical area 5 of the first opening 3 and the second opening 4 defines a thin web 6 on the outer tube.
[0027] Furthermore, the first cutting edge 7 and the second cutting edge 8 are formed on the first opening 3 ...
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Abstract
A device for cutting and aspirating tissue from the human or animal body, preferably used in ophthalmology, especially for eye vitrectomy, for retinal detachment, etc., said device having an outer tube (1) and an inner tube (11), said inner tube (11) can move back and forth coaxially with a small play inside said outer tube (1), wherein the free end (2 of said outer tube (1) ) is closed and has first and second side openings (3, 4) near said free end (2) of said outer tube (1), said first and second side openings (3, 4 ) each have at least one inner cutting edge (7, 8), wherein the free end of the inner tube (11) is open and has an outer cutting edge (12) at the free end of the inner tube (11), wherein Near the free end of the inner tube (11) there is at least one side opening (13) with at least one additional outer cutting edge (14), wherein in the inner tube (11 ) during the movement, the cutting edges (7, 8, 12, 14) of the outer tube (1) and the inner tube (11) work together to cut, characterized in that the first and second openings (3,4) are respectively designed as an asymmetrical circle, an asymmetrical ellipse or an asymmetrical oval, and by the asymmetrical shape of the first and second openings (3,4) on the outer tube (1) The area (5) forms a thin web (6).
Description
technical field [0001] The present invention contemplates a device for cutting and aspirating tissue from the human or animal body, said device being preferably used in ophthalmology, especially for eye vitrectomy, for retinal detachment, etc., said device having an outer tube and an inner tube coaxially movable back and forth with small play within the outer tube, wherein the free end of the outer tube is closed and has a first one and second side openings each having at least one inner cutting edge, wherein the free end of the inner tube is open and has an outer cutting edge adjacent the free end of the inner tube , wherein near the free end of the inner tube there is at least one side opening having at least one outermost cutting edge, wherein during movement of the inner tube, each cutting of the outer tube and the inner tube The blades work together to cut. Background technique [0002] The present invention is basically a surgical cutting instrument for removing tiss...
Claims
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