WO2023029202A1

WO2023029202A1 - Plasma electrode for bladder cancer tumor resection operation

Info

Publication number: WO2023029202A1
Application number: PCT/CN2021/128728
Authority: WO
Inventors: 孙圣坤; 何成东; 曹正国
Original assignee: 江苏邦士医疗科技有限公司
Priority date: 2021-09-02
Filing date: 2021-11-04
Publication date: 2023-03-09
Also published as: CN113749760A

Abstract

A plasma electrode for a bladder cancer tumor resection operation. The plasma electrode comprises an electrode tip (1) and an electrode rod (2), wherein the electrode rod (2) comprises two or more tubular electrode units (21) that are in contact connection; the end of each tubular electrode unit (21) close to the electrode tip (1) is provided with an electrode extension portion (3); and one end of each of the several electrode extension portions (3) converges at the electrode tip (1) and is welded to the electrode tip (1) to form a reinforced portion (11), and the other ends of the several electrode extension portions (3) are respectively connected to an electrode host by means of a wire (8). The plasma electrode for a bladder cancer tumor resection operation enhances the strength of the electrode tip (1), and increases the contact area between the electrode tip (1) and a bladder tumor during an operation, such that the turnover use area in a bladder tumor operation is increased, and the hemostasis effectiveness and the bladder tumor resection efficiency are improved. Moreover, the service life of the plasma electrode is prolonged, and the practicability thereof is enhanced.

Description

A Plasma Electrode for Bladder Cancer Tumor Resection

technical field

The invention relates to the technical field of medical plasma surgical instruments, in particular to a plasma electrode for bladder cancer resection surgery.

Background technique

50% of bladder tumors are located on the side wall of the bladder. At present, the incidence of obturator nerve reflex after resection of side wall tumors is very high, as high as 55.3%-100%, which can easily lead to bladder perforation, bleeding, pelvic organ damage, tumor cell dissemination, Incomplete tumor resection, etc. Currently, the instruments used for resection have a single function, are not fine enough in structure, and have no separation function, resulting in low resection efficiency. At present, there is no effective method to completely eliminate the obturator nerve reflex during electric resection. Based on this, it is necessary to design A new type of plasma electrode for tumor resection of bladder cancer.

In the prior art, CN212089714U, a protruding plasma needle-shaped electrode for transurethral bladder tumor enucleation discloses that the protruding plasma needle-shaped electrode includes two electrode rods and electrode cutter heads, and the two electrode rods The tail end is connected to the power connection line, and the head end is connected to the electrode cutter head. The electrode cutter head includes a vertical section and a horizontal section. The vertical section includes two bottoms connected to the two electrode rods respectively. For vertical electrodes, the tops of the two vertical electrodes are bent toward the head end to form the horizontal section, and the two electrodes of the horizontal section are kneaded into a needle shape at the head end. This utility model improves the shape of the bipolar electrode in the plasma, that is, kneads the tip of the electrode into a needle shape, and the length of the needle electrode is 2mm to ensure the distance between the electrode rod and the resection site, without blocking the surgical field of view, and ensuring the accuracy of cutting . There are two 80° bend angles between the tip of the needle-shaped electrode and the main body of the electrode, so that the tip of the electrode protrudes from the straight line where the electrode rod is located, which can stir up the cauliflower-shaped tumor tissue during the tumor cutting process to achieve precise cutting. The electrode is only different in the shape of the tip electrode, which can be adapted to the current clinical PK, SP host, endoscope and motor, and the bladder tumor is removed by enucleation.

This shape electrode is a needle-shaped electrode that can be inserted into the bladder mucosa, which can effectively achieve layered cutting; due to the existence of two 80° folding angles, it can be used after the electrode is inserted into the mucosa. Open bladder tumors to achieve accurate and efficient enucleation.

However, during the use of the needle-shaped electrode, firstly, the needle-shaped electrode has a cylindrical structure, and the plasma cutting layer formed on its side has a small area and relatively weak strength, making it difficult to effectively cut the bladder tumor. Secondly, the needle-shaped electrode has been used for a period of time Afterwards, it is easy to deform and bend, and its cutting effect and service life are easily affected.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a function that facilitates cutting and separation during surgery, strengthens the strength of the electrode blade and increases the contact area between the electrode blade and the bladder tumor during surgery, so that the bladder tumor In tumor surgery, the use area is increased, the hemostatic effect is improved, the efficiency of bladder tumor resection is improved, and the service life and practicability of a plasma electrode for bladder cancer tumor resection are enhanced.

The technical solution adopted in the present invention is: a plasma electrode for tumor resection of bladder cancer, including an electrode cutter head and an electrode rod, and the electrode rod includes two or more tubular electrode units connected in contact;

An electrode extension part is provided at one end of each tubular electrode unit close to the electrode cutter head;

At the same time, several electrode extension parts converge at the electrode cutter head at one end, and are welded and connected with the electrode cutter head to form a reinforced part; the other ends are respectively connected to the electrode host through a wire, so as to obtain radio frequency energy for the electrode cutter head.

Further, the cross-section of the reinforcement part forms a quasi-elliptical or disc-shaped or polygonal structure.

Further, a first insulating layer is provided on the outer side of each electrode extension part close to the reinforcement part.

Further, each of the electrode extension parts is covered with a steel pipe on the outside near one end of the wire;

And a second insulating layer is provided between the steel pipe and the inner wall of the tubular electrode unit;

The outer wall of one end of the second insulating layer is fixedly connected to the corresponding tubular electrode unit, the inner wall of this end is sleeved on the outer side of the steel pipe and the wire, and the inner wall of the other end extends to the outer side of the first insulating layer.

Further, a third insulating layer is provided at the end of the second insulating layer near the outer side of the electrode cutter head of the first insulating layer;

The third insulating layer extends close to the electrode tip.

Further, several tubular electrode units are connected by laser welding to serve as cathode electrodes together, and a fourth insulating layer is placed outside.

Further, each of the electrode extensions has at least one bent portion at an end close to the electrode blade.

Further, the bending angle of each of the bending parts is 75-105 degrees, and the bending length of the bending part is generally 1-3 mm.

Further, the number of the bent parts is 2-5, and the bent direction is away from or close to the electrode tip.

Further, the outer surface of the electrode cutter head has a planar structure and a curved surface structure similar to a plane.

Further, the number of the tubular electrode units is 2-4.

Further, the electrode tip has a bending angle a relative to the reinforcing part, and the bending angle is 84-92 degrees.

Compared with prior art, the beneficial effect of the present invention is:

1. The product has fine structure, comprehensive functions and flexibility. .

2. The operation is simple, it is convenient to achieve cutting and separation during the operation, and the operation time is shortened.

3. Several tubular electrode units and electrode cutter heads are assembled and welded at the position of the cutter head, which enhances the strength of the electrode cutter head and increases the contact area of the operation. .

4. The welding of the steel pipe of the electrode rod and the wrapping of the insulating layer better stabilize the centering of the electrode cutter head and improve the stability of removing the device.

To sum up, the plasma electrode for bladder cancer tumor resection surgery of the present invention strengthens the strength of the electrode blade and increases the contact area between the electrode blade and the bladder tumor during surgery, so that the area used for flipping during bladder tumor surgery increases, The hemostatic effect is obtained, the efficiency of bladder tumor resection is improved, and its service life and practicability are enhanced.

Description of drawings

Fig. 1 is the structural diagram of an embodiment of the plasma electrode used in bladder cancer tumor resection operation;

Fig. 2 is the enlarged view of place A of the embodiment of Fig. 1;

Fig. 3 is the B direction view of Fig. 2;

Fig. 4 is the cut-away enlarged view of place B of Fig. 1;

Fig. 5 is the structural diagram of another embodiment of the plasma electrode used in bladder cancer tumor resection operation;

Among them: 1-electrode cutter head, 11-reinforcement part; 2-electrode rod, 21-tubular electrode unit; 3-electrode extension part, 31-bending part; 4-electrode working surface, 5-first insulating layer, 6 - second insulation layer, 7 - steel pipe, 8 - wire, 9 - third insulation layer, 10 - fourth insulation layer.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right" etc. are based on the attached The orientation or positional relationship shown in the figure is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred combination or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be interpreted as a reference to this invention. Invention Limitations. In addition, in the description process of the embodiment of the present invention, the positional relationship of devices such as "upper", "lower", "front", "rear", "left", "right" in all figures is based on Figure 1.

As shown in FIG. 1 , a plasma electrode for tumor resection of bladder cancer includes an electrode cutter head 1 and an electrode rod 2, and the electrode rod 2 includes two or more tubular electrode units 21 connected in contact;

Each tubular electrode unit 21 is provided with an electrode extension 3 at one end close to the electrode cutter head 1;

Simultaneously a plurality of electrode extension parts 3, one end gathers at the electrode cutter head 1, and is welded and connected with the electrode cutter head 1 to form the reinforcing part 11; Cutting is performed by forming a plasma thin layer on the electrode working surface 4 of the electrode cutter head 1 (as shown in FIGS. 1 and 3 ).

The plasma electrode scalpel is used for bladder tumor resection surgery. The handle cable is inserted into the plasma host, and the host provides radio frequency energy. This thin layer can cut off the tumor. The tumor on the bladder wall is attached to the bladder wall as a whole. It is impossible to cut it off like a sickle during surgery. During this process, the tumor will block the cutting route. At this time, the triangular area of the cutter head is required to push the tumor and obtain the vision of the tumor in the area to be cut. The operation will be carried out with the help of an endoscope because the structure of the knife head is relatively small, so the design of the triangular area is also to enhance the strength of the knife head.

It can be seen from Fig. 2 and Fig. 3 that the cross-section of the reinforced portion 11 of the plasma electrode forms a quasi-elliptical or disc-shaped or polygonal structure, which further enhances the strength of the connection of the electrode cutter head. The commonly used polygonal structure is Triangles, quadrilaterals, pentagons, etc.

From FIG. 1 , a first insulating layer 5 is provided on the outer side of each electrode extension 3 near the reinforcing portion 11 to protect the electrode extension 3 against leakage.

It can be seen from the enlarged view of accompanying drawing 4 that each of the electrode extensions 3 of the plasma electrode is covered with a steel pipe 7 near one end of the wire 8;

And a second insulating layer 6 is provided between the steel pipe 7 and the inner wall of the tubular electrode unit 21;

The outer wall of one end of the second insulating layer 6 is fixedly connected to the corresponding tubular electrode unit 21, the inner wall of this end is sleeved on the outer side of the steel pipe 7 and the wire 8, and the inner wall of the other end extends to the outer side of the first insulating layer 5. On the basis of the anti-leakage protection ability, the high-efficiency radio frequency connection with the electrode host is realized to form a high-density and high-intensity plasma thin layer on the electrode blade.

It can also be seen from accompanying drawing 4 that the first insulating layer 5 of the plasma electrode is also provided with a third insulating layer 9 near the end of the second insulating layer 6 outside the electrode blade 1;

The third insulating layer 9 extends close to the electrode cutter head 1 , so as to further limit the electrode cutter head 1 and prevent electrode breakdown in the electrode extension part 3 .

All can find out from Fig. 1 to Fig. 4, several described tubular electrode units 21 are connected by laser welding, are used as cathode electrode together, and the 4th insulation layer 10 is placed outside, to ensure the electronic knife head 1 of the head. It has good centering performance, thereby ensuring the cutting accuracy of the electrode cutter head.

It can be seen from Fig. 2 and Fig. 3 that each of the electrode extension parts 3 has at least one bent part 31 near the end of the electrode blade 1, and the bent part 31 is used to further strengthen the reinforced part of the entire plasma electrode. The use intensity is used to improve the acceptance of the thrust that can be felt during the resection of the bladder tumor, thereby increasing the service life of the entire plasma electrode. A better embodiment is that the bending angle of each bending portion 31 is 75°-105°, and the bending length of each bending portion is generally 1-3mm, which can ensure that it has better push-pull strength.

The number of said bending parts 31 of the plasma electrode is 2-5, and the bending direction is away from or close to the electrode cutter head 1. This design is convenient for expanding the field of view of the doctor to observe the bladder tumor during surgical cutting, and improves the simplicity of the operation. It also saves operation time and relieves patients' surgical pain.

It can be seen from FIG. 1 and FIG. 5 that the number of the tubular electrode units 21 of the plasma electrode is 2-4, all of which have good use effects.

It can also be seen from Fig. 1 that the outer surface of the electrode cutter head 1 is a planar structure and a curved surface structure similar to a plane, and the specific planar structure can be a polygonal structure such as a triangle or a quadrilateral and a similar polygonal structure, all of which can facilitate the electrode A rectangular plasma-cut sheet layer is formed on the outer surface. The planar surface structure solves the plane for the overall shape, but there may be local indentations or protrusions. The purpose or source of these local indentations or protrusions can be grasping, strengthening, or In order to enhance the cutting strength of the electrode cutter head, and finally improve its cutting ability. A better embodiment is that the electrode cutter head 1 has a bending angle a relative to the reinforcement part 11, and the bending angle is 84-92 degrees, which can further improve the operating field of view of the electrode cutter head when it is used, thereby improving its performance , when the bending angle is 84, 85, 86, 87, 88, 90, 91 or 84.6, 88.8, etc., these angles can take into account the field of view and the strength design of the electrode cutter head.

The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. Those skilled in the art can easily comprehend the spirit of the present invention based on the above-mentioned embodiments, and make different extensions and changes. But as long as it does not deviate from the spirit of the present invention, it is within the protection scope of the present invention.

Claims

A plasma electrode for tumor resection of bladder cancer, comprising an electrode cutter head (1) and an electrode rod (2), and the electrode rod (2) includes two or more tubular electrode units (21) connected in contact; its features in:

An electrode extension (3) is provided at one end of each tubular electrode unit (21) close to the electrode cutter head (1);

At the same time, several electrode extension parts (3), one end converges at the electrode cutter head (1), and is welded and connected with the electrode cutter head (1) to form a reinforcement part (11); the other ends are respectively connected to the electrode host through a wire (8) .
The plasma electrode according to claim 1, characterized in that: the cross-section of the reinforcing part (11) forms a quasi-elliptical or disc-shaped or polygonal structure.
The plasma electrode according to claim 1, characterized in that: a first insulating layer (5) is provided on the outer side of each electrode extension part (3) close to the reinforcement part (11).
The plasma electrode according to claim 3, characterized in that:

Each of the electrode extensions (3) is covered with a steel pipe (7) outside one end close to the wire (8);

And a second insulating layer (6) is set between the steel pipe (7) and the inner wall of the tubular electrode unit (21);

The outer wall of one end of the second insulating layer (6) is fixedly connected to the corresponding tubular electrode unit (21), the inner wall of this end is sleeved on the outside of the steel pipe (7) and the wire (8), and the inner wall of the other end extends to the first insulating layer ( 5) Outside.
The plasma electrode according to claim 4, characterized in that:

A third insulating layer (9) is also provided at the end of the second insulating layer (6) near the outer side of the first insulating layer (5) of the electrode cutter head (1);

The third insulating layer (9) extends close to the electrode blade (1).
The plasma electrode according to claim 1, characterized in that: several tubular electrode units (21) are connected together by laser welding as cathode electrodes, and a fourth insulating layer (10) is placed outside.
The plasma electrode according to claim 1, characterized in that: each of the electrode extension parts (3) has at least one bent part (31) at an end close to the electrode blade (1).
The plasma electrode according to claim 7, characterized in that: the bending angle of each said bending portion (31) is 75°-105°.
The plasma electrode according to claim 8, characterized in that:

The number of said bending parts (31) is 2-5, and the bending direction is away from or close to the electrode cutter head (1).
The plasma electrode according to any one of claims 1-9, characterized in that the number of said tubular electrode units (21) is 2-4.
The plasma electrode according to any one of claims 1-9, characterized in that: the outer surface of the electrode cutter head (1) has a planar structure and a curved surface structure similar to a plane.
The plasma electrode according to claim 11, characterized in that: the electrode blade (1) has a bending angle a relative to the reinforcing part (11), and the bending angle is 84-92 degrees.