CN114271925A

CN114271925A - Prostate tissue grinder

Info

Publication number: CN114271925A
Application number: CN202011045140.2A
Authority: CN
Inventors: 李彦生
Original assignee: Individual
Current assignee: Beijing Chaoyang Hospital
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2022-04-05
Anticipated expiration: 2040-09-28
Also published as: CN114271925B

Abstract

An embodiment of the present invention provides a prostate tissue shredder, comprising a cannula and a plurality of cutting electrodes movably arranged in the cannula; the plurality of cutting electrodes are connected in pairs to form a conductive loop, and the cutting electrodes The electrode includes electrode wires, and a plurality of the electrode wires form a cage-like structure outside the sleeve. The prostate tissue shredder according to an embodiment of the present invention can cut the prostate tissue into a smaller volume, which is convenient for taking out from the human body.

Description

Prostate tissue grinder

Technical Field

The invention relates to a medical instrument, in particular to a prostate tissue crusher.

Background

Transurethral enucleation of prostate has been widely used to treat Benign Prostatic Hyperplasia (BPH) at present, and is a promising new technique superior to "transurethral prostatectomy". After the end of the past enucleation of the prostate, the operator needs to cut a large gland into small pieces and then wash out the gland, which is time-consuming and labor-consuming, and the gland is more difficult to move if the excised gland enters the bladder.

Currently, the tissue morcellator is used to solve this problem, which saves surgical time and simplifies surgical procedures. However, the conventional tissue pulverization technique has low pulverization and aspiration efficiency, and is vulnerable to bladder injury, especially tough-grained prostatic adenoma, resulting in prolonged operation time. And the tissue grinder belongs to medical equipment, needs to be purchased separately, and has higher cost.

Disclosure of Invention

It is a primary object of the present invention to provide a prostatic tissue morcellator, comprising a cannula and a plurality of cutting electrodes movably disposed within the cannula; the cutting electrodes are connected pairwise to form a conductive loop and comprise electrode wires, and the electrode wires form a cage-shaped structure outside the sleeve.

According to an embodiment of the present invention, the plurality of cutting electrodes are connected two by the wire electrode.

According to an embodiment of the present invention, the cutting electrode includes a wire connected to the wire electrode, the wire being movably disposed within the sheath.

According to an embodiment of the present invention, the sleeve is cylindrical, a plurality of through holes are formed in the sleeve, the through holes extend along an axial direction of the sleeve, and the lead is movably disposed in the through holes.

According to an embodiment of the present invention, the prostate tissue morcellator includes a connection cap located outside the sleeve, and the plurality of electrode wires are disposed at the connection cap.

According to an embodiment of the present invention, a plurality of channels that are not connected to each other are formed in the connection cap, and two connected electrode wires are disposed in the same channel.

According to an embodiment of the present invention, two connected electrode wires are respectively located at two sides of the channel where the electrode wires are arranged.

According to an embodiment of the present invention, the connection cap is a prism or a cylinder, and a plurality of channels are disposed between two bottom surfaces of the prism or the cylinder.

According to an embodiment of the invention, the cage structure is spherical, ellipsoidal, lantern or spindle shaped.

According to an embodiment of the present invention, the wire electrode is arc-shaped, spiral-shaped or S-shaped, or is formed by an arc-shaped line and a line segment.

The prostate tissue crusher of an embodiment of the present invention can cut prostate tissue to a smaller volume, and is convenient to take out of a human body.

Drawings

Various objects, features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:

FIG. 1 is a schematic structural view of a prostate tissue morcellator in accordance with one embodiment of the present invention;

FIG. 2 is a top view of a ferrule, lead and sheath according to one embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a cutting electrode according to an embodiment of the present invention;

FIG. 4A is a schematic structural diagram of a connecting cap according to an embodiment of the present invention;

FIG. 4B is a schematic cross-sectional view of a connector cap in accordance with an embodiment of the present invention;

FIG. 5 is a schematic structural view of a prostate tissue morcellator in accordance with another embodiment of the present invention;

FIG. 6 is a top view of a handle according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive. In addition, the embodiments are described with reference to the drawings, and the terms "upper", "lower", "horizontal" and "transverse" are not intended to limit the features of the present invention.

As shown in fig. 1 to 4B, an embodiment of the present invention provides a prostate tissue morcellator, including a cannula 10 and a plurality of cutting electrodes 20 movably disposed within the cannula 10; the plurality of cutting electrodes 20 are connected two by two to form a conductive circuit, each cutting electrode 20 includes a wire 21 and a wire 22 connected to the wire 21, and the plurality of wires 22 of the plurality of cutting electrodes 20 form a cage-like structure outside the casing 10.

According to the prostate tissue crusher provided by the embodiment of the invention, the cutting electrode 20 moves in the sleeve 10, so that the electrode wire 22 can enter and extend out of the sleeve 10, the expansion and contraction of the cage-shaped structure are realized, and the prostate tissue in the cage is cut and crushed through the electrode wire 22.

In one embodiment, the plurality of cutting electrodes 20 are freely movable along the axial direction of the cannula 10.

In one embodiment, the number of the plurality of cutting electrodes 20 is even so as to be connected two by two. The number of the cutting electrodes 20 is not particularly limited in the present invention, and the number of the cutting electrodes 20 may be at least two, for example, 4, 6, 8, 10, etc.

In one embodiment, the sleeve 10 is cylindrical and made of an insulating material, a plurality of through holes 11 are formed in the sleeve 10 for disposing a plurality of cutting electrodes 20, each cutting electrode 20 is disposed in one of the through holes 11, and the through holes 11 can extend along an axial direction of the sleeve 10 and penetrate through the sleeve 10.

In one embodiment, the number of cutting electrodes 20 is the same as the number of through holes 11.

In one embodiment, a sheath 23 is disposed outside the lead 21 for protection. The sheath 23 may be cylindrical, for example, a cylinder, and the lead 21 is fixedly disposed in the sheath 23 so that both can enter and exit the casing 10 together.

In one embodiment, the sheath 23 is a rigid cylinder with a fixed shape, and the material thereof may be an insulating material, such as insulating plastic.

In one embodiment, one end of the wire electrode 22 is connected to the wire 21 and the other end (tip) is connected to another wire electrode 22, such that a conductive loop is formed between the two cutting electrodes 20.

The prostate tissue crusher according to an embodiment of the present invention includes a connection cap 30, and a plurality of electrode wires 22 are commonly disposed in the connection cap 30, so that the plurality of electrode wires 22 can form a cage-like structure by being bound by the connection cap.

In one embodiment, the connecting cap 30 is provided with a plurality of channels 31 which are not communicated with each other, two connected electrode wires 22 are arranged in the same channel 31, and the plurality of channels 31 are not communicated with each other, so that the arrangement of the connecting cap 30 not only plays a role of binding the electrode wires 22, but also can prevent the electrode wires 22 of a certain current loop from being contacted with the electrode wires 22 of other current loops, thereby causing short circuit.

In one embodiment, the two connected wires 22 respectively extend from two ports of the channel 31, or part or all of the two wires 22 are respectively located at two sides of the channel 31.

In one embodiment, the wire electrode 22 is movably disposed in the channel 31 of the connection cap 30, i.e., the connection cap 30 provides a range of movement for the wire electrode 22 without securing the wire electrode 22.

In one embodiment, the structural shape of the cage formed by the plurality of wires 22 can be further adjusted by changing the position of the channel 31 on the connecting cap 30.

In one embodiment, the wire electrode 22 is fixedly disposed in the channel 31 of the connection cap 30 to maintain the cage-like structure, and the wire electrode 22 is prevented from contacting the tissue inside the human body for protection.

In one embodiment, the number of cutting electrodes 20 is twice the number of channels 31.

In one embodiment, the plurality of channels 31 have different opening directions and are uniformly distributed on the connecting cap 30, so that the plurality of electrode wires 22 can be uniformly dispersed to form a regular cage-shaped structure.

The shape of the connecting cap 30 is not particularly limited in the present invention, and it may be a prism or a cylinder, and the prism may be a triangular prism, a pentagonal prism, a hexagonal prism, or the like.

As shown in fig. 4A and 4B, the connecting cap 30 may be a triangular prism with a small height or thickness, preferably a regular triangular prism, three channels 31 that are not connected to each other may be opened between two bottom surfaces of the triangular prism, each channel 31 is parallel to one side of the triangle, and a pair of connected electrode wires 22 may be disposed in each channel 31, such that a cage-like structure of the pulverizer is surrounded by six electrode wires 22.

In one embodiment, the electrode wire 22 may be made of a conductive metal wire that is resistant to high temperature, flexible, and capable of elastic deformation, so that the formed cage-like structure can crush and cut the prostate tissue under the action of contraction.

In one embodiment, as shown in fig. 5, the wire electrode 22 is composed of oblique lines, vertical lines, and arc lines.

In one embodiment, the wire 22 is in a natural state when it is located outside the casing 10, and when the cutting electrode 20 is pulled up from the end of the wire 21, the wire 21 and the sheath 23 move up along the casing 10, and the wire 22 moves along with the wire and enters the through hole 11 of the casing 10, and its shape is changed from a natural state to a straight line shape by the constraint of the through hole 11.

In one embodiment, the wire electrode 22 may be an elastic wire having a specific shape in a natural state and capable of elastic deformation, and the material thereof may be an elastic alloy, such as nitinol, molybdenum, tungsten, and the like.

In one embodiment, the wire electrode 22 may be in an arc shape as shown in fig. 1, may be formed by an arc line and a line segment as shown in fig. 5, or may be in a spiral shape, an S shape, or the like.

In one embodiment, the connection cap 30 has a transverse dimension greater than that of the through-hole 11, i.e., a dimension perpendicular to the axial direction of the sleeve 10, so that the connection cap 30 remains outside the sleeve 10 after the wire electrode 22 is retracted into the through-hole 11.

In one embodiment, the connecting cap 30 is circular in transverse cross-section and has a diameter equal to the diameter of the cannula 10.

In one embodiment, the cage structure formed by the plurality of wires 22 may be spherical, ellipsoidal, lantern, spindle, or the like.

In one embodiment, the lengths and shapes of the plurality of wires 22 may be different, and the specific shape of the cage structure may be adjusted by adjusting the lengths and shapes of the wires 22 as a whole or individually.

In one embodiment, the shape of the cage structure may be adjusted by individually pulling one or both of the wires 22.

In one embodiment, a handle is provided at the end of the lead wire 21 of the cutting electrode 20 to facilitate the operation of advancing and retracting the cutting electrode 20 within the cannula 10.

In one embodiment, as shown in fig. 6, the handle includes a disk and a handle 42 disposed on the disk, a plurality of grooves 41 are disposed along the periphery of the disk for the sheath 23 to be clamped therein, and the handle 42 is disposed at the center of the disk. Each groove 41 is used for clamping a sheath 23, and after all the leads 21 are clamped in the grooves 41 through the sheaths 23, the holding handle 42 moves along the axial direction of the sleeve 10 to drive all the cutting electrodes 20 to move along with the movement.

In one embodiment, the groove 41 may be a circular groove having a notch, and the arc of the arc corresponding to the notch may be 30 to 150 °, such as 45 °, 60 °, 75 °, 90 °, 120 °, and the like.

In one embodiment, the handle 42 is rod-shaped and has a length that is aligned with the axis of the cannula 10.

In one embodiment, individual movement of one or more cutting electrodes 20 may be achieved by withdrawing one or more sheaths 23 from the handle.

When the prostate tissue crusher provided by the embodiment of the invention is used, the prostate tissue crusher is stretched into a human body, then the plurality of electrode wires 22 are stretched out of the sleeve 10 to the maximum distance or the large enough distance between the electrode wires 22, so that prostate tissue can enter a cage surrounded by the plurality of electrode wires 22, then the lead 21 is lifted upwards, the volume of the cage-shaped structure is gradually contracted, the plurality of electrode wires 22 are fully contacted with the prostate tissue, the prostate tissue is cut into small blocks by the plurality of electrode wires 22 after electrification, and the small prostate tissue can be cut again until the volume is small enough to be conveniently taken out of the human body.

The prostate tissue crusher of an embodiment of the present invention can facilitate the tissue crushing technique, improve the crushing efficiency, and reduce the cost.

The cutting electrode or the prostate tissue crusher provided by the embodiment of the invention can be used together with common electrode equipment, and is low in cost and easy to popularize.

Unless otherwise defined, all terms used herein have the meanings commonly understood by those skilled in the art.

The described embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of the present invention, and those skilled in the art may make various other substitutions, alterations, and modifications within the scope of the present invention, and thus, the present invention is not limited to the above-described embodiments but only by the claims.

Claims

1. A prostate tissue morcellator comprising a cannula and a plurality of cutting electrodes movably disposed within the cannula; the cutting electrodes are connected pairwise to form a conductive loop and comprise electrode wires, and the electrode wires form a cage-shaped structure outside the sleeve.

2. The prostate tissue morcellator of claim 1, wherein the plurality of cutting electrodes are connected two by the wire electrode.

3. The prostate tissue morcellator of claim 1, wherein the cutting electrode includes a wire connected to the wire electrode, the wire being movably disposed within the cannula.

4. The prostatic tissue morcellator of claim 3, wherein the sleeve is cylindrical, a plurality of through holes are formed in the sleeve, the through holes extend in an axial direction of the sleeve, and the wire is movably disposed in the through holes.

5. The prostatic tissue morcellator of claim 1, comprising a connection cap located outside the sleeve, the plurality of electrode wires being disposed on the connection cap.

6. The prostatic tissue morcellator of claim 5, wherein a plurality of unconnected channels are defined in the connecting cap, and two connected wires are disposed in the same channel.

7. The prostatic tissue morcellator of claim 6, wherein two connected wires are located on either side of the channel in which they are disposed.

8. The morcellator of claim 6, wherein the connecting cap is a prism or cylinder having a plurality of the channels defined between two base surfaces thereof.

9. The prostate tissue morcellator of claim 1, wherein the cage structure is spherical, ellipsoidal, lantern, or spindle shaped.

10. The prostate tissue morcellator of claim 1, wherein the wire electrode is arcuate, helical or S-shaped, or consists of arcuate lines and wire segments.