WO2022007733A1

WO2022007733A1 - Multifunctional high-frequency cutter for endoscope

Info

Publication number: WO2022007733A1
Application number: PCT/CN2021/104421
Authority: WO
Inventors: 胡晓刚; 韩贯通; 高嵩; 完颜宏涛
Original assignee: 安瑞医疗器械(杭州)有限公司
Priority date: 2020-07-08
Filing date: 2021-07-05
Publication date: 2022-01-13
Also published as: CN111671514A

Abstract

A multifunctional high-frequency cutter for an endoscope, comprising a sheath tube (8), a cutter I (12), an electrocoagulation head (18), a first handle (3), a second handle (2), an electrode holder (5) and an injection connection port (4). The rear end of the sheath tube (8) is fixedly connected to the second handle (2); a spring flow guide tube (16) is arranged in the sheath tube (8) in a penetrating manner; the rear end of the spring flow guide tube (16) is fixedly connected to the first handle (3); the first handle (3) moves back and forth and drives the spring flow guide tube (16) to move back and forth; the front part of the sheath tube (8) is further sleeved with an outer sheath tube (10); the electrocoagulation head (18) and the cutter I (12) penetrate through the front part of the outer sheath tube (10); the rear end of the cutter I (12) is fixedly connected to the spring flow guide tube (16); the cutter I (12) is provided with an inner cavity and is in communication with the spring flow guide tube (16); and the spring flow guide tube (16) moves back and forth and drives the cutter I (12) to extend out and retract from the front end of the outer sheath tube (10). The instrument integrates the functions of cutting, electrocoagulation and an injection needle to achieve the three-in-one effect, so that a doctor can conduct corresponding operations according to needs, thereby saving the time for replacing the instrument.

Description

A kind of multifunctional high frequency cutter for endoscope

technical field

The invention relates to the technical field of medical instruments, and more particularly, to a multifunctional high-frequency cutter for endoscope.

Background technique

With the development of endoscopic technology and other related technologies, endoscopic treatment and screening of early gastrointestinal cancer has become the preferred treatment method. At present, the conventional treatment of early gastrointestinal cancer often requires the use of many instruments. For example, first use an injection needle to mark the lesion or inject it to make it bulge, then use an electric knife to cut or peel it off, and finally use a hemostatic clip or an electric knife or an injection needle to suture or stop bleeding. The operation process is cumbersome and the instruments are replaced frequently, which not only has low operation efficiency but also requires high professional skills of doctors; instrument replacement increases the pain of patients and the operation cost is relatively high. The Chinese patent with the application publication number CN108523986A discloses a high-frequency tool with an injection needle for an endoscope. When the high-frequency tool is operated, the two-finger handle needs to be locked by a locking member to avoid accidents in the axial electrode. Sliding, which brings inconvenience to the operation of the medical staff; if the locking member is not locked, when the two-finger handle or the slider is moved, a linkage phenomenon will occur, and misoperation will occur, which will bring unexpected accidents to patients. At the same time, the axial electrode and the needle tube are arranged side by side in the outer sheath tube, so that the radial dimension of the outer sheath tube is larger.

The Chinese patent with the application publication number CN109771027A discloses a multi-functional cutting knife, which relates to a device including a conductive liquid injection knife head, a snare, a cable, an outer tube assembly, and a slip ring and an electrode plug core rod. Multifunctional scalpel for tissue stripping and water injection before and during microscopic mucosal dissection.

The Chinese patent with the authorization announcement number CN209074869U discloses a new type of mucosal incision knife, which involves integrating the mucosal incision knife and the injection needle into different cavities of the double-lumen catheter, so as to realize the functions of integrating the injection needle and the mucosal incision knife The new mucosal incision knife.

The Chinese patent with the authorization announcement number CN209186932U discloses a high-frequency electric knife for endoscopy with a liquid injection structure, which relates to a liquid injection channel formed by using the gap between the knife body and the distal limit ring to achieve the injection function. Endoscopic high frequency electrosurgery.

The Chinese patent with the authorization announcement number CN209186930U discloses a high-frequency electric knife for endoscope with double cutter heads, which relates to a high-frequency electric knife for endoscopy with double cutter heads. The structure uses one cutter head to control the retraction movement of the other cutter head.

The Chinese patent with the authorization announcement number CN209916189U discloses a biliary mucosal electrocoagulation bulb, which relates to a biliary mucosal electrocoagulation bulb. The addition of an electrocoagulator at the front end of the device can perform electrocoagulation and hemostasis in time during surgery.

U.S. Patent Publication No. US20190298435A1 relates to a shaft with a central lumen connected to an electrode with an electrode lumen at the distal end of the shaft, and the electrode contains one or more electrode lumen exits at different angles with an injection function. High-frequency electrosurgical equipment.

The aforementioned patents still have some drawbacks, including:

1) The functions are not diversified enough, and it still cannot meet the multi-functional needs of doctors for high-frequency electrical instruments;

2) When performing injection or electric resection, some unnecessary operations need to be performed, which increases the operational burden of doctors;

3) The structure is more complicated and the manufacturing cost is high.

technical problem

In view of the deficiencies in the prior art, the present invention provides a multifunctional high-frequency cutter for endoscope, which integrates the functions of cutting, coagulation and injection needle to achieve three-in-one, and doctors can perform corresponding operation, thus saving the time of changing instruments and improving the efficiency of the operation. .

technical solutions

In order to achieve the above object, the present invention provides the following technical solutions: a multifunctional high-frequency cutter for endoscope, comprising a sheath tube, an I knife, an electrocoagulation head, a first handle, a second handle, an electrode holder and an injection interface;

The rear end of the sheath tube is fixedly connected with the second handle, and a spring guide tube is passed through the sheath tube; a first handle is slidably arranged on the second handle, and the rear end of the spring guide tube is fixedly connected with the first handle , the first handle slides back and forth on the second handle and drives the spring guide tube to move back and forth relative to the sheath tube. At the same time, the spring guide tube is connected with the connector on the electrode seat, and the inner cavity of the spring guide tube is connected with the injection interface connection;

The outer sheath is also sleeved with an outer sheath, the front part of the outer sheath is pierced with the I knife and the electrocoagulation head, the I knife runs through the electrocoagulation head, and the back of the I knife is The end is fixedly connected with the front end of the spring guide tube;

The electrocoagulation head is fixed on the front end of the sheath tube, and the I knife is electrically connected with the electrocoagulation head; the outer sheath tube slides backward relative to the sheath tube to expose the electrocoagulation head;

The I knife has an inner cavity and is communicated with the spring guide tube; the spring guide tube moves back and forth and drives the I knife to extend and retract from the front end of the outer sheath.

Preferably, the front end of the second handle is also fixed with a sleeve.

Preferably, an outer sheath handle is fixed at the rear end of the outer sheath tube, the outer sheath handle is connected to the sheath tube, and the outer sheath handle moves backwards and drives the outer sheath tube to move backward relative to the sheath tube.

Preferably, the spring guide tube is covered with a plastic coating layer.

Preferably, the second handle includes a handle body and a thumb ring fixed at the rear end of the handle body; the first handle is a double-finger ring structure.

Preferably, the front end of the electrocoagulation head is also fixed with a ceramic pad, and the I knife penetrates the ceramic pad.

Preferably, the injection interface is fixed on the first handle.

Preferably, the I knife is also provided with a radial electrode that is electrically connected to the electrocoagulation head, and the electrocoagulation head is connected to the I knife through the radial electrode.

Preferably, the radial electrode is fixed on the I knife; or, the radial electrode is fixed on the electrocoagulation head.

Preferably, the electrode holder and the second handle are connected by snap connection, interference fit or screw connection.

beneficial effect

To sum up, the present invention has the following beneficial effects:

1. The spring guide tube of the present application has both the functions of conduit and conduction, that is, when cutting, the connector on the spring guide tube and the electrode holder is connected with the I knife to form an electrical circuit; during injection, the spring guide tube The inner cavity, the injection interface and the inner cavity of the I knife are connected to form an injection channel; in this way, on the one hand, between the liquid injection and electric cutting functions, through the reverse movement of the corresponding driving member, firstly, the accident of the standby function can be completely eliminated. Start-up to avoid accidental injury to the patient or interference with the surgical process; at the same time, it can reduce unnecessary actions in the operation of the doctor and improve the efficiency of surgery; secondly, it can also avoid the linkage of multiple functional parts in the same direction and cause misoperation Phenomenon;

2, the I knife of the application penetrates the electrocoagulation head, and the electrocoagulation head is worn on the front end of the sheath tube and is fixedly connected with the sheath tube, so that the radial dimension of the sheath tube can be reduced;

3. The internal structure of the high-frequency electrical apparatus is simpler and the manufacturing cost is low.

Description of drawings

Fig. 1 is the structural representation of the present invention;

2 is a cross-sectional view of an insertion portion of the high-frequency electrical apparatus;

Fig. 3 is the schematic diagram that I knife of the present invention is in working state;

FIG. 4 is a schematic diagram of the electrocoagulation head of the present invention in a working state.

Reference numerals: 1, thumb ring; 2, second handle; 3, first handle; 4, injection interface; 5, electrode holder; 6, connector; 7, cannula; 8, sheath tube; 9, outer sheath Handle; 10, outer sheath tube; 11, ceramic head; 12, I knife; 13, radial electrode; 15, ceramic pad; 16, spring guide tube; 17, plastic coating; 18, electrocoagulation head.

Embodiments of the present invention

The present invention will be further described with reference to the accompanying drawings.

This embodiment discloses a multifunctional high-frequency tool for endoscope, as shown in Figures 1-4, comprising a sheath 8, an I knife 12, an electrocoagulation head 18, a first handle 3, a second handle 2, an electrode The seat 5 and the injection interface 4; the electrode seat 5 is provided with a connector 6, while the electrode seat 5 is arranged at the front end of the second handle 2, and is connected with the second handle 2 by snap connection, interference fit or screw connection; in addition , the injection interface 4 is fixed on the first handle 3; the rear end of the sheath tube 8 is fixedly connected with the second handle 2, and the sheath tube 8 is provided with a spring guide tube 16, and the spring guide tube 16 is also covered with Insulation layer, the first handle 3 is slidably arranged on the second handle 2, the rear end of the spring guide tube 16 is fixedly connected with the first handle 3, the first handle 3 moves back and forth on the second handle 2 and drives the spring guide tube 16 The back and forth movement is performed relative to the sheath tube 8, and at the same time, the spring guide tube 16 is connected with the connector 6 on the electrode holder 5, and the inner lumen of the spring guide tube 16 is communicated with the injection interface 4; the sheath tube 8 is also sleeved with a The outer sheath tube 10, the front part of the outer sheath tube 10 is provided with the electrocoagulation head 18 and the I knife 12, and the I knife 12 penetrates the electrocoagulation head 18, so that the radial size of the sheath tube 8 can be further reduced, and the The front end is also fixed with a protective ceramic pad 15, and the I knife runs through the ceramic pad 15, and the rear end of the I knife 12 is fixedly connected with the front end of the spring guide tube 16; The front end of the knife 12 is also provided with a radial electrode 13 that is electrically connected to the electrocoagulation head 18, and the electrocoagulation head 18 is connected to the I knife 12 through the radial electrode 13; the outer sheath tube 10 slides backward relative to the sheath tube 8 to expose the At the same time, the I knife 12 has an inner cavity and communicates with the spring guide tube 16; the spring guide tube 16 moves back and forth and drives the I knife 12 to extend and retract from the front end of the outer sheath 10.

Injection needle mode: push the first handle 3 forward along the second handle 2, and the first handle 3 drives the spring guide tube 16 and the I knife 12 to move forward, so that the I knife 12 extends from the front end of the outer sheath 10 to reach. In the working state, the inner cavity of the injection interface 4, the spring guide tube 16 and the inner cavity of the I knife 12 are communicated into a channel, and the syringe is connected on the injection interface 4 to carry out the injection operation;

High-frequency I knife mode: push the first handle 3 forward along the second handle 2, and the first handle 3 drives the spring guide tube 16 and the I knife 12 to move forward, so that the I knife 12 extends from the front end of the outer sheath 10. Go out and reach the working state; At this time, the connector 6, the spring guide tube 16 and the I knife 12 form a connection circuit, and the high frequency is electrically connected to the connector 6, and the I knife 12 cutting operation is carried out;

Electrocoagulation mode: when the I knife 12 is fully retracted, the outer sheath tube 10 is pulled backward along the sheath tube 8, so that the coagulation head 18 is exposed from the front end of the outer sheath tube 10, and the coagulation head 18 is working at this time. state; at this time, the connector 6, the spring guide tube 16, the I knife 12, the radial electrode 13 and the coagulation head 18 form a connection circuit; the high frequency is electrically connected to the connector 6, and the electric coagulation head 18 is electrically connected. Coagulation and hemostasis operation.

The device integrates the functions of the I knife 12, the electrocoagulation head 18 and the injection needle to achieve a three-in-one function. The doctor can perform corresponding operations according to the needs, that is, the electrocoagulation and hemostasis operation can be performed; the normal saline can be injected to raise the lesion; The mucosal tissue can be cut and stripped; this saves the time for changing instruments, improves the efficiency of the operation, and minimizes the pain of the patient.

In the technical solution of the present application, the spring guide tube 16 has both the functions of conduit and conduction, that is, when cutting, the spring guide tube 16, the connector 6 on the electrode holder 5 and the I knife 12 are connected to form an electrical circuit; At the time, the inner lumen of the spring guide tube 16, the injection interface 4 and the inner lumen of the I knife 12 communicate with each other to form an injection channel; in this way, on the one hand, between the liquid injection and the electric cutting function, through the reverse movement of the corresponding driving member, In this way, the accidental activation of the standby function can be completely eliminated, and accidental injury to the patient or interference with the surgical process can be avoided; at the same time, unnecessary actions in the operation of the doctor can be reduced, and the surgical efficiency can be improved; secondly, multiple functional parts can be avoided. On the other hand, the radial size of the sheath tube 8 can be reduced, the internal structure of the device is simpler, and the manufacturing cost is low.

Further, the front end of the second handle 2 is also fixed with a sleeve 7, and the outer sheath 10 slides backward to abut against the sleeve 7 and expose the electrocoagulation head 18; at the same time, the rear end of the outer sheath 10 is fixed with an outer sheath handle. 9. The outer sheath handle 9 is sleeved on the sheath tube 8, and the outer sheath handle 9 moves backward and drives the outer sheath tube 10 to move backward relative to the sheath tube 8.

In addition, the second handle 2 includes a handle body and a thumb ring 1 fixed at the rear end of the handle body; the first handle 3 is a double-finger ring structure, which is convenient for doctors to operate with one hand.

The specified directions in this specific embodiment are only for the convenience of expressing the positional relationship and the mutual cooperation relationship between the various components. The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

A multifunctional high-frequency tool for endoscope, comprising a sheath tube (8), an I knife (12), an electrocoagulation head (18), a first handle (3), a second handle (2), and an electrode holder (5) ) and injection interface (4); it is characterized by:

The rear end of the sheath tube (8) is fixedly connected with the second handle (2), and the sheath tube (8) is provided with a spring guide tube (16); the second handle (2) is slidably provided with a first handle (3), the rear end of the spring guide tube (16) is fixedly connected with the first handle (3), the first handle (3) slides back and forth on the second handle (2) and drives the spring guide tube (16) ) moves back and forth relative to the sheath tube (8), at the same time, the spring guide tube (16) is connected with the connector (6) on the electrode seat (5), and the inner lumen of the spring guide tube (16) is connected with the injection interface (4) Connectivity;

The sheath tube (8) is also sleeved with an outer sheath tube (10), and the front part of the outer sheath tube (10) is pierced with the I knife (12) and the electrocoagulation head (18), so the The I knife (12) penetrates the electrocoagulation head (18), and the rear end of the I knife (12) is fixedly connected with the front end of the spring guide tube (16);

The electrocoagulation head (18) is fixed on the front end of the sheath tube (8), and the I knife (12) is electrically connected with the electrocoagulation head (18); the outer sheath tube (10) is backward relative to the sheath tube (8) Sliding can expose the coagulation head (18);

The I knife (12) has an inner cavity and is communicated with the spring guide tube (16); the spring guide tube (16) moves back and forth and drives the I knife (12) to extend and retract from the front end of the outer sheath (10) .
The multifunctional high-frequency tool for endoscope according to claim 1, characterized in that: the front end of the second handle (2) is further fixed with a sleeve (7).
The multifunctional high-frequency tool for endoscope according to claim 1, characterized in that: an outer sheath handle (9) is fixed at the rear end of the outer sheath tube (10), and the outer sheath handle (9) is sleeved Connected to the sheath tube (8), the outer sheath handle (9) moves backward and drives the outer sheath tube (10) to move backward relative to the sheath tube (8).
The multifunctional high-frequency tool for endoscope according to claim 3, characterized in that: the spring guide tube (16) is covered with a plastic coating layer.
The multifunctional high-frequency tool for endoscope according to claim 1, characterized in that: the second handle (2) comprises a handle body and a thumb ring (1) fixed at the rear end of the handle body; the first handle (3) ) is a double ring structure.
The multifunctional high-frequency tool for endoscope according to claim 1, characterized in that: the front end of the electrocoagulation head (18) is further fixed with a ceramic pad (15), and the I knife (12) penetrates the ceramic pad (15).
The multifunctional high-frequency cutter for endoscope according to claim 1, wherein the injection interface (4) is fixed on the first handle (3).
The multifunctional high-frequency cutter for endoscope according to claim 1, wherein the I cutter (12) is further provided with a radial electrode (13) electrically connected to the electrocoagulation head (18), The electrocoagulation head (18) is connected to the I knife (12) through the radial electrode (13).
The multifunctional high-frequency tool for endoscope according to claim 1, characterized in that: the radial electrode is fixed on the I knife (12); or, the radial electrode is fixed on the electrocoagulation head (18) superior.
The multifunctional high-frequency tool for endoscope according to claim 1, wherein the electrode holder (5) and the second handle (2) are connected by snap connection, interference fit or screw connection.