WO2021179863A1

WO2021179863A1 - Injection apparatus, snare, and medical device

Info

Publication number: WO2021179863A1
Application number: PCT/CN2021/075329
Authority: WO
Inventors: 李常青; 韦建宇; 沈正华; 冯明浩; 李宁; 奚杰峰; 唐志; 金鸿雁; 刘春俊
Original assignee: 南微医学科技股份有限公司
Priority date: 2020-03-13
Filing date: 2021-02-04
Publication date: 2021-09-16
Also published as: CN111227928A

Abstract

An injection apparatus, a snare, and a medical device. The injection apparatus (10) comprises: a tube body (11), the tube body (11) having a first shuttle channel (111) configured for shuttling a snare apparatus, a shuttle opening (112) for a snare of the snare apparatus to pass through being provided on a far end of the tube body (11); a needle (12), the needle (12) being fixed on the far end of the tube body (11); a protective sheath (13), the protective sheath (13) slidably sleeved on the tube body (11), so as to enclose the needle (12) within or to expose the needle (12). Cooperation between the protective sheath (13) and the tube body (11), and large space for movement of the needle (12) allows the needle (12) to better extend out, and allows for more convenient needle projection, and also facilitates the needle (12) in performing injection on target tissue.

Description

Injection devices, snares and medical equipment

Cross-references to related applications

This application claims the priority of the Chinese patent application with the application number CN202010173973.0 and the name "injection device, snare and medical equipment" filed with the Chinese Patent Office on March 13, 2020, the entire content of which is incorporated herein by reference Applying.

Technical field

This application relates to the technical field of medical devices, and specifically to an injection device, a snare and medical equipment.

Background technique

The snare is mainly used for endoscopy with high-frequency electricity to remove various polyps, excess tissues and lesions in the body. Endoscopic mucosal resection (EMR) refers to the injection of drugs into the submucosal layer of the lesion (such as sessile polyps, flat or shallow concave polyps, leiomyomas, esophagus, stomach and colon early cancer, etc.) to form a liquid cushion and then cut out Techniques for large pieces of mucosal tissue. The advantage of this method is that the lesion can be excised under the endoscope without surgery. The traditional surgical method is divided into two steps:

The first step: first use the remote injection needle, use the distal tip to puncture into the submucosa, inject the drug through the proximal handle lumen, elevate the mucosa and the diseased tissue on the mucosa, and then withdraw the injection needle.

The second step: The snare is delivered to the lesion through the endoscope clamp channel, and the lesion tissue is taken out and then electrified to remove it.

Traditional endoscopic mucosal resection (EMR) requires access to multiple traditional instruments to complete. Common snares currently in clinical use generally do not have an injection function. Before the flat polyp is removed, an injection needle needs to be used for submucosal injection to bulge the mucosa. Then the injection needle is withdrawn and the snare is inserted for cutting. The lesion needs to be cut, so it needs to be injected repeatedly to bulge and cut. Therefore, it is necessary to repeatedly operate different instruments to enter and exit the endoscope clamp channel (the working channel of the endoscope instrument), so a lot of doctor time will be wasted during the operation, and the medical burden of the patient will also be increased. In the related art, there are some snares with injection function, but there are still technical problems of inconvenience of needle ejection and poor overall adaptability.

Summary of the invention

The purpose of the present application includes, for example, to provide an injection device which is easy to eject the needle and has better overall adaptability.

The purpose of this application also includes providing a snare, which is convenient for needle ejection and has better overall adaptability.

The purpose of this application also includes providing a medical device which is convenient for needle ejection and has better overall adaptability.

The embodiments of this application can be implemented as follows:

The embodiment of the present application provides an injection device, which includes:

A tube body, the tube body is provided with a first shuttle channel configured to shuttle the ferrule device, and the distal end of the tube body is provided with a shuttle port for the ferrule of the ferrule device to pass through;

A needle, the needle is fixed to the distal end of the tube;

The sheath tube is slidably sheathed on the tube body to cover the needle or expose the needle.

Optionally, the inner wall of the tube body is provided with a liquid injection channel, the distal end of the liquid injection channel penetrates the distal end of the tube body to form a through opening, and the proximal end of the liquid injection channel extends along the first The extension direction of the shuttle channel extends; the needle is installed in the through port, and a part of the needle protrudes relative to the distal end of the tube.

Optionally, the injection device further includes a connector including an injection tube and a first connector and a second connector that are connected to each other, the first connector is configured to be connected to the liquid supply device, and the second connector is configured to Connect with operating device;

The first connector is assembled with the proximal end of the tube body, the proximal end of the injection tube is connected with the first connector, and the distal end of the injection tube is connected with the liquid injection channel;

The second joint is provided with a second shuttle channel for the loop device to shuttle, and the second shuttle channel is in communication with the first shuttle channel;

Wherein, the operating device is connected to the ferrule device, and is configured to drive the ferrule device to shuttle in the tube.

Optionally, the proximal end of the liquid injection channel penetrates the proximal end of the tube body to form an insertion port, and a part of the injection tube is inserted into the liquid injection channel through the insertion port and is opposite to the tube body fixed.

Optionally, the injection device further includes a heat-shrinkable tube, the heat-shrinkable tube is sheathed with the tube body, the heat-shrinkable tube is located between the joint and the needle, and the proximal end of the heat-shrinkable tube Assemble with the joint.

Optionally, the injection device further includes a push-pull member that slidably covers the tube body and is connected to the sheath tube to drive the sheath tube to slide relative to the tube body .

Optionally, the push-pull member includes a sheath nut and a sheath screw, the sheath nut slidably covers the tube body, the sheath tube is fixed to the sheath nut, and the sheath screw The tube body is slidably sheathed, and the distal end of the sheath screw is threadedly engaged with the sheath nut.

Optionally, a stop piece is provided at the proximal end of the sheath, the stop piece is accommodated in the sheath nut and is stopped by the inner wall of the sheath nut, and the sheath screw The distal end extends into the sheath nut and abuts against the stop plate.

Optionally, the injection device further includes a protective lock that cooperates with the tube body and stops the push-pull member to restrict the movement of the protective sleeve.

Optionally, the sheath screw is located on a side of the sheath screw away from the needle, the protection lock is detachably engaged with the tube body, and the engagement position is located at the sheath screw One side away from the sheath nut; when the protection lock is engaged with the tube body, the distal end of the protection lock contacts the proximal end of the sheath screw and stops the sheath screw, So as to keep the sheath tube in the state of covering the needle.

Optionally, the protection lock includes an operating portion and a tubular lock body, and the operating portion is connected with the outer wall of the lock body;

The lock body is provided with a pipe, the lock body is provided with a notch communicating with the pipe, and the notch penetrates from the distal end of the lock body to the proximal end of the lock body along the axis of the lock body. The lock body is configured to clamp the tube body into the pipe through the notch.

Optionally, the injection device further includes a distal end fixing ring, and the distal end fixing ring is fixedly sleeved on the distal end of the tube body.

Optionally, the needle is rod-shaped and extends along the axial direction of the tube.

An embodiment of the present application also provides a snare, which includes a snare device and the above-mentioned injection device, the snare device slidably shuttles in the first shuttle channel.

Optionally, the ferrule device includes a ferrule and a cable, the two free ends of the ferrule are connected and fixed to the distal end of the cable, and the cable slidably passes through the first shuttle In the channel, the proximal end of the cable is configured to be connected with the operating device.

Optionally, the snare further includes an operating device, the operating device is connected to the pipe body, the operating device is connected to the cable, and the operating device is configured to drive the cable to shuttle through the pipe.

Optionally, the operating device includes a core rod and an operating block, the distal end of the core rod is connected to the tube body, the proximal end of the cable is connected to the operating block, and the operating block is slidably connected. It is connected to the core rod to drive the pull cable to shuttle in the tube.

Optionally, the operating device further includes an electrode base and an electrode;

The electrode base is fixed to the operating block, the electrode base is connected to the electrode, and the proximal end of the cable is connected to the electrode base.

Optionally, the operating device further includes a connecting ring and a connecting cap;

The connecting ring and the connecting cap are relatively fixed, and the pull cables are both sleeved, the connecting cap is connected with the tube body, and the distal end of the core rod is connected with the connecting cap.

Optionally, the operating device further includes a limit block that is slidably connected to the core rod and can be fixed relative to the core rod, and the limit block is configured to be connected to the operating block Touch to stop the operation block.

An embodiment of the present application also provides a medical device, which includes a liquid supply device, a power supply device, and the above snare. The liquid supply device is configured to supply liquid to the needle, and the power supply device is configured to supply liquid to the needle. The ferrule is powered.

The beneficial effects of the injection device, snare and medical equipment of the embodiments of the present application include, for example:

The loop device can be shuttled through the tube body, and the loop of the loop device can be passed through the shuttle port, that is, the target tissue can be removed. The needle is fixed on the distal end of the tube, and when the sheath is slid relative to the tube, the needle can be covered, that is, when the tube is inserted into the human body, the needle can be housed in the sheath, When the needle needs to be injected, the needle can be exposed by operating the protective tube. The matching of the protective tube and the tube body has a large movement space for the needle, which can make the needle better extend, and the needle is more convenient. At the same time, It is also convenient for the needle to inject liquid into the target tissue, and the overall adaptability is better.

The snare includes the injection device, which has all the functions of the injection device.

The medical equipment includes the snare, which has all the functions of the snare.

Description of the drawings

In order to more clearly describe the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative work, other related drawings can be obtained based on these drawings.

FIG. 1 is a schematic diagram of the structure of the medical equipment provided by this embodiment;

2 is a schematic structural diagram of the snare provided by this embodiment from a first perspective;

3 is a schematic structural diagram of the snare provided by this embodiment from a second perspective;

Figure 4 is a schematic structural diagram of the snare provided by this embodiment after being decomposed;

Figure 5 is a schematic view of the assembly of the pipe body and the sheath tube in the snare from a first perspective;

Fig. 6 is a schematic diagram of the assembly of the pipe body and the sheath tube in the snare from a second perspective;

Figure 7 is a schematic diagram of the needle in the snare;

Figure 8 is a cross-sectional view of the tube in the snare;

Figure 9 is a schematic view of the push-pull member of the snare from a first perspective;

Figure 10 is a schematic diagram of the push-pull member of the snare from a second perspective;

Figure 11 is a schematic diagram of the protection lock in the snare;

Figure 12 is a schematic view of the joint in the snare from a first perspective;

Figure 13 is a schematic diagram of the joint in the snare from a second perspective;

Figure 14 is a schematic diagram of the operating device in the snare;

Figure 15 is a schematic diagram of the connecting cap in the snare;

Figure 16 is a schematic view of the core rod in the snare.

Icon: 100-snare; 10-injection device; 11-tube body; 111-first shuttle channel; 112-shuttle port; 113-infusion channel; 114-through port; 115-insertion port; 12-needle; 121 -First puncture surface; 122-second puncture surface; 123-third puncture surface; 13-sheath tube; 131-stop piece; 14-joint; 141-first joint; 142-second joint; 1421 The second shuttle channel; 15-injection tube; 16-heat shrinkable tube; 17-push-pull member; 171-sheath nut; 1711-wing; 172-sheath screw; 1721-stop block; 18-protection lock; 181 -Lock body; 1811-pipe; 1812-notch; 182-operating part; 19-distal fixing ring; 20-ferrule device; 21-ferrule; 22-cable; 23-rivet tube; 30-operating device; 31-Connecting ring; 32-Connecting cap; 321-Protrusion; 322-Curved block; 33-Core rod; 330-Slide groove; 331-Annular groove; 332-Graduation; 333-First ring; 34-Operation Block; 341-block body; 342-second ring; 343-third ring; 344-fixed cylinder; 35-electrode base; 36-electrode; 37-limiting block; 371-clamping part; 200-liquid supply Device; 300-power supply device.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the drawings in the embodiments of this application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

It should be noted that similar reference numerals and letters indicate similar items in the following figures. Therefore, once a certain item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

In the description of this application, it should be noted that if the terms "upper", "lower", "inner" and "outer" indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or It is the orientation or positional relationship that the product of the invention is usually placed in use, only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or must be constructed and configured in a specific orientation. Operation, therefore cannot be construed as a limitation of this application.

In addition, if the terms "first" and "second" appear, they are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

It should be noted that, in the case of no conflict, the features in the embodiments of the present application can be combined with each other.

In the related art, when the target tissue (for example, flat polyp) needs to be removed, the related instruments generally need to enter the human body through the endoscopic forceps.

In one way, the submucosa at the lesion tissue can be injected by injection to bulge the mucosa, and then the injection needle can be withdrawn, and a common snare without injection function can be inserted for cutting. This method will operate different instruments, the surgical process will be cumbersome, time-consuming and labor-intensive, and will also increase the medical burden of the patient.

In another way, a snare with injection function can also be directly inserted for operation, that is, liquid is injected first, and then cut. Although this method is relatively simple, it still has technical problems such as inconvenience of needle ejection and poor overall adaptability. The injection device, snare and medical equipment provided by this embodiment can effectively alleviate this technical problem. Specifically, the structure will be described in detail below.

In this embodiment, FIG. 1 is a schematic structural diagram of the medical device provided in this embodiment. 2 and 3 are schematic diagrams of the structure of the snare 100 from different viewing angles. FIG. 4 is a schematic diagram of the structure of the snare 100 after being disassembled. FIGS. 5 to 16 are schematic diagrams of the various parts of the snare 100.

It should be noted that those skilled in the art can understand that in the full text, during the use of the snare 100, the front end of the snare 100 will extend into the human body, and the back end of the snare 100 will be operated by a doctor. Therefore, relatively, the part of each component close to the front end of the snare 100 is called the distal end of the component, and the part of the component close to the rear end of the snare 100 is called the proximal end of the component. In FIGS. 2 and 3, in the direction from the distal end to the proximal end of the snare 100, the various components of the snare 100 are roughly shown in order in FIGS. 5 to 16.

Please refer to FIG. 1, this embodiment provides a medical device, which includes a liquid supply device 200, a power supply device 300, and a snare 100. The liquid supply device 200 is configured to supply the needle 12 of the snare 100 (shown in FIG. 4). The power supply device 300 is configured to supply power to the ferrule 21 (shown in FIG. 4) of the snare 100. That is, the snare 100 in this embodiment not only has the function of cutting the target tissue, but also has the function of injecting the target tissue.

The power supply device 300 provides a high-frequency current, which acts on the target tissue through the ferrule 21 to cut the target tissue. The liquid supply device 200 can use a pressure pump for injection to provide liquid to the needle 12, so that before the target tissue is cut, the target tissue can be injected to make it swell, and at the same time, after the target tissue is cut, the needle 12 can be passed through. Flush the target tissue. The power supply device 300 and the liquid supply device 200 are in the prior art, and will not be repeated here. The snare 100 in this embodiment will be described in detail below.

Please refer to FIGS. 2 and 3, the snare 100 includes an injection device 10, a snare device 20 and an operating device 30. The injection device 10 cooperates with the liquid supply device 200, and the main function is to inject liquid into the target tissue. The loop device 20 slidably shuttles through the first shuttle channel 111 (detailed below) of the injection device 10, and the main function of the loop device 20 is to loop the target tissue. The operating device 30 cooperates with the power supply device 300, and the main function is to control the action of the ferrule device 20 under the operation of the doctor, and the power supply device 300 supplies power to the ferrule 21 of the ferrule device 20 to cut the target tissue.

Please refer to Figures 4 to 8, the injection device 10 includes:

The tube body 11 is provided with a first shuttle channel 111 configured for the loop device 20 to shuttle through, and the distal end of the tube body 11 is provided with a shuttle port 112 for the loop 21 of the loop device 20 to pass through.

The needle 12 is fixed to the distal end of the tube body 11.

The sheath tube 13 is slidably sheathed with the tube body 11 to cover the needle 12 or expose the needle 12.

It should be noted that the needle 12 is assembled to the tube body 11, and is relatively fixed to the tube body 11, so that the tube body 11 has at least two functions. That is, after the tube body 11 is passed through the ferrule device 20, the target tissue can be looped, so that the target tissue can be cut when the ferrule 21 is energized. At the same time, the needle 12 on the tube body 11 can perform puncture operations, and after the liquid supply device 200 is externally connected, the target tissue can be injected with liquid under the operation of the doctor.

The sheath tube 13 can be operated by a doctor to cover or expose the needle 12 installed at the distal end of the tube body 11. Those skilled in the art can know that when the needle 12 is covered by the sheath 13, the tube 11 can effectively shuttle in the endoscope forceps, and when it moves to the vicinity of the target tissue, the doctor can operate the sheath 13. Move the sheath 13 to the proximal end. At this time, the needle 12 is not covered by the sheath 13 and is in an exposed state. Push the tube 11 to the distal end to pierce the needle 12 on the tube 11 In the target organization.

It is understandable that the ferrule device 20 can be shuttled through the tube body 11, and the ferrule 21 of the ferrule device 20 can be passed through the shuttle port 112, that is, the target tissue can be removed. The needle 12 is fixed on the distal end of the tube 11, and when the sheath 13 slides relative to the tube 11, the needle 12 can be covered, that is, when the tube 11 is inserted into the human body, the needle 12 can be It is housed in the protective sleeve 13. When the needle 12 needs to be injected, the doctor operates the protective sleeve 13 to expose the needle 12. With the cooperation of the protective sleeve 13 and the tube body 11, the needle 12 has a large space for movement. The needle 12 can be better extended, the needle is more convenient, and at the same time, it is also convenient for the needle 12 to inject liquid into the target tissue, and the overall adaptability is better. The injection device 10 has a compact overall structure, a small volume and a low manufacturing cost. Generally, when the injection device 10 is shuttled in the endoscope forceps, the needle 12 is housed in the sheath 13 to protect the endoscope forceps from damage.

It is understandable that the sheath tube 13 may be an ordinary tube, with only one lumen, which serves as a sheath for the tube body 11. In other embodiments, the sheath tube 13 may also have multiple lumens, that is, The sheath tube 13 can be a multi-lumen tube, in which one main lumen is equipped with a tube body 11, and the remaining lumen can be configured for liquid injection or insertion of other equipment.

5 and 6, in this embodiment, the inner wall of the tube body 11 is provided with a liquid injection channel 113, the distal end of the liquid injection channel 113 penetrates the distal end of the tube body 11 to form a through port 114, the proximal part of the liquid injection channel 113 The end extends along the extension direction of the first shuttle channel 111 (it can also be understood that the liquid injection channel 113 and the first shuttle channel 111 are arranged side by side); The end protrudes.

The part of the needle 12 is accommodated in the liquid injection channel 113 through the through opening 114, and the external liquid supply device 200 supplies liquid to the liquid injection channel 113 to realize the flow of liquid from the needle 12. Since the needle 12 is directly fixed and installed on the tube body 11, its length can be reduced as much as possible, for example, its length can be reduced to less than 5mm. Regardless of whether the needle 12 is covered by the sheath 13 or not, the entire injection device 10 is Has better flexibility and bending properties.

With reference to FIGS. 5 and 6, in this embodiment, the injection device 10 further includes a distal end fixing ring 19, and the distal end fixing ring 19 fixes the distal end of the sleeve 11. The distal end fixing ring 19 can strengthen the distal end of the tube body 11 and can effectively increase its service life.

With reference to FIGS. 6 and 7, in this embodiment, the needle 12 is in the shape of a rod and extends along the axial direction of the tube 11. The proximal end of the needle 12 is installed in the penetrating port 114, for example, by means of interference fit or adhesive bonding. With reference to Fig. 7, the distal end of the needle 12 is formed with a first puncture surface 121, a second puncture surface 122, and a third puncture surface 123. Through such an arrangement, the puncture efficiency can be improved.

In this embodiment, the needle 12 has a straight rod shape, and the length direction of the needle 12 is parallel to the axial direction of the tube 11. At the same time, in this embodiment, the needle 12 is positioned eccentrically, that is, it is not on the axis of the tube 11. In other embodiments, the needle 12 and the tube 11 may be arranged coaxially.

With reference to Figure 8, the tube body 11 can be manufactured by injection molding, that is, a first shuttle channel 111 is formed in the tube body 11, and a liquid injection channel 113 is formed in a part of the thicker inner wall of the tube body 11. . Optionally, the first shuttle channel 111 penetrates the distal end and the proximal end of the tube body 11, and the liquid injection channel 113 penetrates the distal end and the proximal end of the tube body 11.

In the above manner, since the needle 12 is directly fixed on the tube body 11, the outer diameter of the needle 12 can be made relatively large, and at the same time, the outer diameter of the tube body 11 can be made small.

In addition, compared to some prior art snares with injection function (the needles in the snare are shuttled), in this embodiment, since the needle 12 is directly fixed on the tube body 11, it passes The protective sleeve 13 can realize the needle ejection. Since the inner diameter of the protective sleeve 13 is relatively large, that is, the needle ejection channel is large, the needle 12 is easy to eject the needle. In other words, when the overall use environment is not very straight, a large needle exit channel is easier to exit the needle than a small needle exit channel.

In the prior art, generally, in order to form a large needle exit channel, the outer diameter of the tube covering the needle is made relatively large, which will inevitably cause inconvenience in shuttle through the endoscopic forceps. If the needle is designed with a stainless steel needle tube, although it can pass through the endoscope clamp, it sacrifices the bending performance, that is, the bending performance is poor.

In this embodiment, the injection device 10 has a smaller overall outer diameter, while ensuring the injection channel 113 and the needle 12 with a larger inner diameter, that is, the injection flow rate is ensured, the injection efficiency is improved, and the target tissue swelling time is shortened, and It can ensure the performance of cornering, and the needle will be out smoothly.

Please refer to Figures 9-11, in conjunction with Figure 4, in this embodiment, the injection device 10 further includes a push-pull member 17, the push-pull member 17 is slidably sleeved on the tube body 11, and is connected with the protective sleeve 13 to drive the protective tube The sleeve 13 slides relative to the pipe body 11.

The push-pull member 17 functions as a handle. When in use, the distal end of the tube body 11 extends into the human body. The push-pull member 17 is located outside the human body so that the doctor can operate the push-pull member 17 to drive the protective sleeve 13 to move.

9 and 10, in this embodiment, the push-pull member 17 includes a sheath nut 171 and a sheath screw 172. The sheath nut 171 is slidably sleeved on the pipe body 11, and the sheath tube 13 is fixed to the sheath nut 171. The sheath screw 172 is slidably sheathed with the tube body 11, and the distal end of the sheath screw 172 is threadedly engaged with the sheath nut 171.

It is understandable that the sheath nut 171 can be fixed to the sheath tube 13 by means of gluing, clamping, etc. The sheath screw 172 is screwed to the sheath nut 171, and the outer wall of the sheath nut 171 is protruded There are two wings 1711, and the outer wall of the sheath screw 172 is provided with anti-skid patterns, which can achieve the purpose of anti-skid, which is convenient for doctors to operate.

In this embodiment, the push-pull member 17 is composed of two parts, namely the sheath nut 171 and the sheath screw 172. In other embodiments, the push-pull member 17 may be only one part, for example, it is cylindrical, triangular, etc. , It is sleeved on the tube body 11 and is fixedly connected with the sheath tube 13, or the push-pull member 17 itself is a protruding part on the proximal end of the sheath tube 13, so that the doctor can hold it.

10, specifically, the proximal end of the sheath 13 is provided with a stop piece 131, the stop piece 131 is accommodated in the sheath nut 171, and is stopped by the inner wall of the sheath nut 171, the sheath screw 172 The distal end extends into the sheath nut 171 and abuts against the stop piece 131.

During installation, the sheath nut 171 can be inserted from the distal end of the tube body 11, and then moved proximally along the tube body 11, when the stop piece 131 is moved to be contacted by the inner wall of the sheath nut 171, the sheath nut 171 can be installed. The screw 172 and the sheath screw 172 are assembled with the sheath nut 171 in a threaded manner. When the distal end of the sheath screw 172 abuts the stop piece 131, the installation of the push-pull member 17 is completed. At the same time, the outer wall of the sheath screw 172 is also provided with a stop block 1721 protruding, after being installed in place, the stop block 1721 contacts the proximal end of the sheath nut 171.

Please refer to FIG. 11 in combination with FIG. 4. In this embodiment, the injection device 10 further includes a protective lock 18 that cooperates with the tube body 11 and stops the push-pull member 17 to restrict the movement of the protective sleeve 13. The protective lock 18 can restrict the sheath tube 13 from moving proximally.

Specifically, the sheath screw 172 is located on the side of the sheath screw 172 away from the needle 12, the protective lock 18 is detachably engaged with the tube body 11, and the engagement position is located on the side of the sheath screw 172 away from the sheath nut 171; When the protective lock 18 is engaged with the tube body 11, the distal end of the protective lock 18 contacts the proximal end of the sheath screw 172, and stops the sheath screw 172, so that the sheath 13 keeps the state of covering the needle 12 .

When the protection lock 18 is clamped on the tube body 11, the distal end of the protection lock 18 is attached to the sheath screw 172, but not connected to each other. The existence of the protection lock 18 can reduce the chance of doctors' misoperation. Generally, during the process of inserting the distal end of the tube body 11 into the human body, the protective lock 18 is always locked on the tube body 11, and the distal end of the protective lock 18 stops the sheath screw 172 so that the needle 12 can be covered with material. The sheathing tube 13 is covered. When a liquid injection operation is required, the doctor removes the protective lock 18 and holds the sheath nut 171 or sheath screw 172 to move it proximally. At this time, the needle 12 covered by the sheath 13 is exposed. At this time, the tube body 11 can be operated to pierce the needle 12 into the target tissue.

With reference to FIG. 11, specifically, the protection lock 18 includes an operating portion 182 and a tubular lock body 181, and the operating portion 182 is connected to the outer wall of the lock body 181. The lock body 181 is provided with a pipe 1811. The lock body 181 is provided with a gap 1812 communicating with the pipe 1811. The gap 1812 penetrates from the distal end of the lock body 181 along the axis of the lock body 181 to the proximal end of the lock body 181, and the lock body 181 is configured to pass through The notch 1812 clamps the pipe body 11 into the pipe 1811.

It is understandable that the doctor can hold the operating part 182 and move it vertically, and the tube body 11 can be clamped into the pipe 1811 through the notch 1812 to realize the locking between the protective lock 18 and the tube body 11.合 state. The outer wall of the operating portion 182 is uneven, which can increase the friction and facilitate the operation of the doctor.

Optionally, the protective lock 18 used in other embodiments may also be non-detachable relative to the tube body 11. For example, the protective lock 18 is always fitted on the tube body 11, and its shape may be a sheet or a cylinder. , As long as the push-pull member 17 can be stopped.

Please refer to FIGS. 12 and 13 in conjunction with FIG. 4, in this embodiment, the injection device 10 further includes a joint 14. The joint 14 includes an injection tube 15 and a first joint 141 and a second joint 142 connected to each other. The first joint 141 It is configured to be connected to the liquid supply device 200, and the second connector 142 is configured to be connected to the operating device 30.

The first joint 141 is assembled with the proximal end of the tube body 11, the proximal end of the injection tube 15 is in communication with the first joint 141, and the distal end of the injection tube 15 is in communication with the injection channel 113.

The second joint 142 is provided with a second shuttle channel 1421 through which the loop device 20 is shuttled, and the second shuttle channel 1421 is in communication with the first shuttle channel 111.

Wherein, the operating device 30 is connected to the ferrule device 20 and is configured to drive the ferrule device 20 to shuttle in the tube body 11.

The first joint 141 and the second joint 142 are integrally formed at the distal end of the joint 14, and the distal end of the joint 14 is fixedly assembled with the proximal end of the tube body 11, so that the pull cord 22 ( Details below) can pass through the second shuttle channel 1421 and can be connected with the operating device 30 so that the doctor can control the cable 22 through the operating device 30. At the same time, the injection tube 15 plays the role of connecting the first joint 141 and the liquid injection channel 113. After the external liquid supply device 200 is assembled with the first joint 141, the liquid injection channel 113 is supplied through the first joint 141 so that the liquid It flows out from the needle 12.

The connector 14 is equivalent to a three-way device and can be understood as a luer connector. Optionally, the joint 14 (second joint 142) can be integrally formed with the distal end of the operating device 30, or fixed by welding. That is, the second joint 142 may not be an actual joint, but only a part of the joint 14.

It should be noted that in other embodiments, only one joint may be reserved, that is, only the second joint 142 is reserved, and the second joint 142 is connected to the operating device 30. At this time, the first connector 141 does not exist, and the proximal end of the injection tube 15 can be exposed by opening a hole on the outer wall of the second connector 142. A male connector can be installed at the proximal end of the injection tube 15 and the liquid supply device The injection end of the 200 (for example, an injection needle) is equipped with a female connector, and the male connector is threaded with the female connector to realize liquid supply. In this way, since the injection tube 15 can be made of a flexible material, that is, it is a hose, it is convenient to adjust the position of the injection end of the liquid supply device 200.

With reference to Figures 4 and 12, in this embodiment, the proximal end of the injection channel 113 penetrates the proximal end of the tube body 11 to form an insertion port 115, and a part of the injection tube 15 is inserted into the injection channel 113 through the insertion port 115 and is connected to the tube. The body 11 is relatively fixed.

Part of the injection tube 15 is inserted into the liquid injection channel 113, and it can be fixed by interference fit or glue connection, which can improve the sealing performance of the liquid injection and avoid liquid leakage.

4, in this embodiment, the injection device 10 further includes a heat-shrinkable tube 16, the heat-shrinkable tube 16 sleeves the tube body 11, the heat-shrinkable tube 16 is located between the joint 14 and the needle 12, the proximal end of the heat-shrinkable tube 16 and The joint 14 is assembled.

The heat-shrinkable tube 16 can further improve the sealing effect. Specifically, the proximal end of the heat-shrinkable tube 16 is glued to the distal end of the joint 14. When the protection lock 18 is clamped on the tube body 11, the distal end of the heat shrinkable tube 16 can contact the proximal end of the protection lock 18.

Please refer to FIGS. 14-16 and in conjunction with FIG. 4. Specifically, the ferrule device 20 includes a ferrule 21 and a cable 22. Two free ends of the ferrule 21 are connected and fixed to the distal end of the cable 22, and the cable 22 It slidably shuttles in the first shuttle channel 111, and the proximal end of the cable 22 is configured to be connected with the operating device 30.

In this embodiment, the ferrule device 20 further includes a riveting tube 23, which is riveted at a position where the two free ends of the ferrule 21 and the distal end of the cable 22 are connected and fixed to connect the cable 22 and the ferrule 21. connect.

Optionally, the two free ends of the ferrule 21 can be fixed to the cable 22 by welding. When the target tissue needs to be sheathed, the ferrule 21 extends out of the tube body 11 through the shuttle port 112, the cable 22 shuttles in the first shuttle channel 111, the proximal end of the cable 22 is connected to the operating device 30, and the electrode 36 is connected to an external power supply The device 300 is connected. The power supply device 300 supplies power to the electrode 36 and supplies power to the ferrule 21 through the cable 22. After the ferrule 21 is energized, the sheathed target tissue is cut.

In this embodiment, the ferrule 21 is equivalent to realizing the energized cutting function. In other embodiments, the ferrule 21 can also be cut directly without energizing, or in other words, the cutting function can be realized without the electrode 36 and the power supply device 300.

4 and 14, in this embodiment, the snare 100 further includes an operating device 30, the operating device 30 is connected to the pipe body 11, the operating device 30 is connected to the cable 22, and is configured to drive the cable 22 in the pipe body 11 Shuttle within.

The operating device 30 is fixed to the proximal end of the aforementioned connector 14, and it mainly realizes the operation of the cable 22.

In this embodiment, the operating device 30 includes a core rod 33 and an operating block 34. The distal end of the core rod 33 is connected to the tube 11, the proximal end of the cable 22 is connected to the operating block 34, and the operating block 34 is slidably connected to the core. The rod 33 drives the cable 22 to shuttle in the tube body 11.

Specifically, the operating device 30 further includes a connecting ring 31, a connecting cap 32, an electrode base 35 and an electrode 36. The connecting ring 31 and the connecting cap 32 are relatively fixed, and both are sleeved with a cable 22, the connecting cap 32 is connected to the tube body 11, and the distal end of the core rod 33 is connected to the connecting cap 32. The electrode base 35 is fixed to the operating block 34, the electrode base 35 is connected to the electrode 36, and the proximal end of the cable 22 is configured to pass through the connecting ring 31 and the connecting cap 32 and then connect to the electrode base 35.

It should be noted that the connecting ring 31 can be made of elastic material. After the assembly is completed, the connecting ring 31 can play a role of assisting the locking of the connecting cap 32. At the same time, the connecting ring 31 can also prevent the liquid at the distal end from flowing back to the hand-held part at the proximal end to cause leakage.

Optionally, the electrode base 35 may not be fixed on the operating block 34, for example, fixed on the connecting cap 32, which is in sliding contact with the cable 22 to supply power to the cable 22.

Optionally, the connecting ring 31 and the connecting cap 32 may be integrally formed and manufactured, and the connecting ring 31 and the connecting cap 32 may have a certain sealing function, or the connecting ring 31 and the connecting cap 32 may not have a sealing function, and only serve as a connection. The role of the joint 14 (the second joint 142) and the core rod 33. In other embodiments, the connecting ring 31 and the connecting cap 32 may be omitted, and the second joint 142 and the core rod 33 may be integrally formed.

In this embodiment, the distal end of the connecting cap 32 has internal threads, the proximal end of the connector 14 (the second connector 142) has external threads, and the two threads are matched. With reference to FIG. 15, the distal end of the connecting cap 32 has a protruding portion 321. The connecting ring 31 is stopped by the protrusion 321 inside the proximal end of the joint 14. In conjunction with FIG. 4, an arc-shaped block 322 is provided on the inner wall of the proximal end of the connecting cap 32. In conjunction with FIG. 16, the distal end of the core rod 33 has The annular groove 331, the connecting cap 32 is sleeved on the distal end of the core rod 33, and the arc block 322 is slidably arranged in the annular groove 331, so that the connecting cap 32 can rotate relative to the core rod 33 That is, the doctor can fix the connecting cap 32 with the left hand and rotate the core rod 33 with the right hand to adjust the relative position of the ferrule 21.

With reference to Figures 4 and 14, the core rod 33 is provided with a sliding groove 330 open on one side, and the proximal end of the cable 22 is arranged in the sliding groove 330. The operating block 34 includes a block 341, a second ring 342, and a third ring 343. And a fixed cylinder 344. The block 341 is slidably sheathed with the core rod 33, the second ring 342 and the third ring 343 are respectively fixed on opposite sides of the block 341, the fixed cylinder 344 is fixed to the block 341, and the electrode base 35 is fixed to the fixed cylinder 344 The electrode 36 is threadedly fitted with the electrode base 35, and one end of the electrode 36 protrudes relative to the mouth of the fixed cylinder 344. When the doctor operates the second finger ring 342 and the third finger ring 343, the block 341 can move relative to the core rod 33 and drive the cable 22 to move. 14 and 16, the core rod 33 is provided with a scale 332, through the relative position of the scale 332 and the operating block 34, the position of the cable 22 can be determined, and then the position of the ferrule 21 and the proximal end of the core rod 33 can be determined A first ring 333 is provided, which is convenient for doctors to operate. With reference to Figures 4 and 14, the operating device 30 further includes a limit block 37, which is slidably connected to the core rod 33 and can be fixed relative to the core rod 33, and the limit block 37 is configured to be in contact with the operating block 34, To stop the operation block 34.

The limit block 37 is provided with an engaging portion 371, which is clamped on the sliding groove 330. The limit block 37 can contact the operating block 34 to stop the operating block 34. When the cable 22 does not need to be operated , The operating block 34 is stopped by the stop block 37, so as to stop the cable 22, and then stop the position of the ferrule 21.

According to a snare 100 provided in this embodiment, the working process of the snare 100 is as follows:

When working, first pass the entire distal end of the snare 100 through the endoscope forceps and place it near the target tissue, then remove the protective lock 18, move the sheath nut 171 proximally, and the sheath nut 171 drives the connection The sheath 13 moves to the proximal end. At this time, the needle 12 covered by the sheath 13 is exposed, and then the needle 12 is pressed against the target tissue with force. The needle 12 enters the target tissue at this time, and then the connector 14 is connected to the supply The liquid device 200 performs injection. After the target tissue is raised, operate the sheath nut 171 to retract the needle 12 into the sheath 13, then extend the ferrule 21 out of the sheath 13, put the ferrule 21 on the root of the target tissue, and then pull The operating block 34 tightens the ferrule 21 through the cable 22, then connects the electrode 36 to the power supply device 300, and the ferrule 21 is energized to cut the target tissue. After cutting, the liquid can be injected through the liquid supply device 200 again. At this time, the needle 12 sprays a water column to further wash the wound.

The snare 100 has the functions of injection, cutting and flushing, and has good bending performance and adaptability, which greatly saves operation time and cost.

In summary, the embodiments of the present application provide an injection device 10, a snare 100, and medical equipment. The ferrule device 20 can be shuttled through the tube body 11, and the ferrule 21 of the ferrule device 20 can pass through the shuttle port. 112 through out, that is, the target tissue can be excised. The needle 12 is fixed on the distal end of the tube 11, and when the sheath 13 slides relative to the tube 11, the needle 12 can be covered, that is, when the tube 11 is inserted into the human body, the needle 12 can be It is housed in the protective sleeve 13. When the needle 12 needs to be injected, the protective sleeve 13 can be operated to expose the needle 12. The cooperation of the protective sleeve 13 and the tube body 11 makes the needle 12 have a large movement space. This allows the needle 12 to be better extended, making it easier to eject the needle, and at the same time, it is also convenient for the needle 12 to inject liquid into the target tissue, and the overall adaptability is better.

The snare 100 includes the injection device 10, which has all the functions of the injection device 10.

The medical equipment includes the snare 100, which has all the functions of the snare 100.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application, All should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

An injection device, characterized in that it comprises:

A tube body, the tube body is provided with a first shuttle channel configured to shuttle the ferrule device, and the distal end of the tube body is provided with a shuttle port for the ferrule of the ferrule device to pass through;

A needle, the needle is fixed to the distal end of the tube;

The sheath tube is slidably sheathed on the tube body to cover the needle or expose the needle.
The injection device according to claim 1, wherein the inner wall of the tube body is provided with a liquid injection channel, the distal end of the liquid injection channel penetrates the distal end of the tube body to form a through opening, and the injection channel The proximal end of the fluid channel extends along the extending direction of the first shuttle channel; the needle is installed in the through opening, and a part of the needle protrudes relative to the distal end of the tube.
The injection device according to claim 2, wherein the injection device further comprises a connector, the connector comprising an injection tube and a first connector and a second connector connected to each other, and the first connector is configured to communicate with the liquid supply Device connection, the second connector is configured to be connected to the operating device;

The first connector is assembled with the proximal end of the tube body, the proximal end of the injection tube is connected with the first connector, and the distal end of the injection tube is connected with the liquid injection channel;

The second joint is provided with a second shuttle channel for the loop device to shuttle, and the second shuttle channel is in communication with the first shuttle channel;

Wherein, the operating device is connected to the ferrule device, and is configured to drive the ferrule device to shuttle in the tube.
The injection device according to claim 3, wherein the proximal end of the injection channel penetrates the proximal end of the tube body to form an insertion port, and a part of the injection tube is inserted into the injection port through the insertion port. The liquid channel is relatively fixed with the tube body.
The injection device according to claim 3, wherein the injection device further comprises a heat-shrinkable tube, the heat-shrinkable tube is sheathed with the tube body, and the heat-shrinkable tube is located between the joint and the needle. In between, the proximal end of the heat shrinkable tube is assembled with the joint.
The injection device according to any one of claims 1-5, wherein the injection device further comprises a push-pull member, the push-pull member slidably sleeves the tube body and is connected to the sheath tube , To drive the sheath tube to slide relative to the tube body.
The injection device according to claim 6, wherein the push-pull member comprises a sheath nut and a sheath screw, the sheath nut slidably covers the tube body, and the sheath and the The sheath nut is fixed, the sheath screw is slidably sheathed with the tube body, and the distal end of the sheath screw is threadedly matched with the sheath nut.
The injection device according to claim 7, wherein the proximal end of the sheath is provided with a stop piece, and the stop piece is accommodated in the sheath nut and is protected by the sheath nut. The distal end of the sheath screw extends into the sheath nut and abuts against the stop plate.
The injection device according to claim 7, wherein the injection device further comprises a protection lock, the protection lock cooperates with the tube body and stops the push-pull member to restrict the movement of the sheath tube .
The injection device according to claim 9, wherein the sheath screw is located on a side of the sheath screw away from the needle, the protection lock is detachably engaged with the tube body, and the The engaging position is located on the side of the sheath screw far away from the sheath nut; when the protection lock is engaged with the tube body, the distal end of the protection lock contacts the proximal end of the sheath screw, And stop the sheath screw to keep the sheath in the state of covering the needle.
The injection device according to claim 10, wherein the protective lock comprises an operating part and a tubular lock body, and the operating part is connected with the outer wall of the lock body;

The lock body is provided with a pipe, the lock body is provided with a notch communicating with the pipe, and the notch penetrates from the distal end of the lock body along the axis of the lock body to the proximal end of the lock body. The lock body is configured to clamp the tube body into the pipe through the notch.
The injection device according to any one of claims 1 to 5, wherein the injection device further comprises a distal end fixing ring, and the distal end fixing ring is fixedly sleeved on the distal end of the tube body.
The injection device according to any one of claims 1-5, wherein the needle is rod-shaped and extends along the axial direction of the tube body.
A snare, comprising a snare device and the injection device according to any one of claims 1-13, the snare device slidably shuttles in the first shuttle channel.
The snare according to claim 14, wherein the ferrule device comprises a ferrule and a cable, two free ends of the ferrule are connected and fixed to the distal end of the cable, and the cable It slidably shuttles in the first shuttle channel, and the proximal end of the cable is configured to be connected with the operating device.
The snare according to claim 15, wherein the snare further comprises an operating device, the operating device is connected to the tube body, the operating device is connected to the cable, and is configured to drive the The cable shuttles in the tube.
The snare according to claim 16, wherein the operating device comprises a core rod and an operating block, the distal end of the core rod is connected to the tube body, and the proximal end of the cable is connected to the operating block. Block connection, the operating block is slidably connected to the core rod to drive the cable to shuttle in the tube.
The snare according to claim 17, wherein the operating device further comprises an electrode base and an electrode;

The electrode base is fixed to the operating block, the electrode base is connected to the electrode, and the proximal end of the cable is connected to the electrode base.
The snare according to claim 17, wherein the operating device further comprises a connecting ring and a connecting cap;

The connecting ring and the connecting cap are relatively fixed, and the pull cables are both sleeved, the connecting cap is connected with the tube body, and the distal end of the core rod is connected with the connecting cap.
The snare according to claim 17, wherein the operating device further comprises a limit block, the limit block is slidably connected to the core rod and can be fixed relative to the core rod, and the The limiting block is configured to be in contact with the operating block to stop the operating block.
A medical equipment, characterized by comprising a liquid supply device, a power supply device, and the snare according to any one of claims 14-20, the liquid supply device is configured to supply liquid to the needle, and the power supply device is configured Power is supplied to the ferrules in pairs.