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Device for cutting tissue

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: 2017-08-29
GEUDER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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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Examples

Experimental program
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Embodiment Construction

[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 for use in ophthalmology, in particular for vitrectomy, for retinal peeling, etc., with an outer tube (1), and with an inner tube (11) which can move to and fro concentrically in the outer tube (1) with slight play, wherein the outer tube (1) is closed at the free end (2) and has, near the free end (2), a first and a second lateral opening (3, 4) with in each case at least one inner cutting edge (7, 8), wherein the inner tube (11) is open at the free end and there has an outer cutting edge (12), wherein the inner tube (11) has, near the free end, at least one lateral opening (13) with at least one further outer cutting edge (14), and wherein the cutting edges (7, 8, 12, 14) of the outer tube (1) and of the inner tube (11) cooperate in a cutting action during the movement of the inner tube (11), characterized in that the first and second opening (3, 4) are each designed as an asymmetrical circle, as an asymmetrical ellipse or as an asymmetrical oval, and in that a thin web (6) is formed by the asymmetrical area (5) of the first and second opening (3, 4) on the outer tube (1).

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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Application Information

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IPC IPC(8): A61F9/007
CPCA61B2017/320028A61F9/00763
Inventor V·盖德
Owner GEUDER AG
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