Rotary cutting device for digestive endoscopy

Abstract

The utility model belongs to the technical field of medical instruments, particularly relates to a rotary cutting device for a digestive endoscopy, and aims to solve the problems that an existing device lacks a synchronous hemostasis function during mechanical rotary cutting, and operation is complicated and deep tissues are easily damaged when a focus is cut off by adopting an argon knife. Comprising an endoscope handle, an endoscope pipeline, a rotary cutting assembly and a negative pressure suction cover, the endoscope pipeline is inserted into the alimentary canal of a patient, the rotary cutting assembly at the front end of the endoscope pipeline is used for cutting off a focus part in the alimentary canal, and the rotary cutting mode is adopted, so that operation is convenient when the rotary cutting device faces a peripheral focus or a large-area focus; the angle and the position of the endoscope do not need to be adjusted repeatedly, deep tissue is prevented from being damaged during excision operation, the excision focus tissue can be sucked away by the negative pressure suction cover, the excision focus can be cleaned, digestive juice tissue at the focus position can be sucked away synchronously, and excision operation can be conducted smoothly.

Description

Technical Field

[0001] The utility model relates to a rotary cutting device, in particular to a digestive endoscope rotary cutting device, belonging to the technical field of medical devices. Background Technique

[0002] The incidence of digestive tract diseases (such as polyps, early cancer, submucosal tumors, scar stenosis, etc.) has been increasing year by year. Due to the large trauma and long recovery period of traditional surgical operations, they have gradually been replaced by endoscopic minimally invasive techniques. According to the statistics of the World Gastroenterology Organization (WGO), about 20 million digestive endoscope surgeries are carried out globally every year, and more than 30% of them involve tissue resection treatment. However, the resection of complex lesions (such as circumferential lesions, deeply invasive tumors) still faces challenges such as low efficiency and high risk of complications, and there is an urgent need for safer and more precise instrument support.

[0003] In the prior art, such as a digestive endoscope rotary cutting system disclosed in the publication number CN119700248A, the rotary cutting assembly can quickly cut blood clots into smaller volumes through the cutter, so as to prevent the size of the blood clot from being larger than the size of the suction groove. The purpose of the rotary cutting system is to quickly cut the blood clots in the digestive tract cavity into smaller volumes and then suck them out to expose the digestive tract lesions, facilitating hemostasis for patients and saving patients' lives. However, although the mechanical rotary cutting device can rotate and cut, it lacks a synchronous hemostasis function and is prone to bleeding. Secondly, for a multifunctional laparoscopic argon knife disclosed in the publication number CN216777208U, it includes an argon knife body, a controller, a suction device, a flushing device, and a laser positioning device; the argon knife body includes an argon knife pen and an argon knife head, the suction device includes a suction head, the flushing device includes a flushing head, and the argon knife head, the suction head, and the flushing head are all arranged at the head end of the argon knife pen; a laser positioning device is also arranged on the head end of the argon knife pen. Through the utility model, a multifunctional laparoscopic argon knife is provided. The flushing device can remove blood stains to provide a cleaner operation area for the argon knife. The suction device solves the problems that the continuous bleeding from the wound surface during the operation of the argon knife affects the vision and the working smoke interferes with the vision. The laser positioning optical auxiliary device can mark the safe operation area to avoid thermal damage to the surrounding normal tissues or important blood vessels and nerves, enabling the argon knife to achieve more precise and safe operations. However, with a monopolar injection design, the plasma beam can only propagate linearly along the axial direction of the catheter. For circumferential lesions (such as esophageal stenosis, circumferential growth of colon polyps), doctors need to repeatedly adjust the angle of the endoscope and the position of the lesion, resulting in an extended operation time (an average increase of 15 - 20 minutes), and it is easy to cause lesion residues due to visual blind spots, with cumbersome operations and easy damage to deep tissues, making it difficult to meet the flexibility and safety requirements of endoscopic surgeries. Content of the Utility Model

[0004] The present utility model provides a digestive endoscope cutting device to solve the problems that the existing device lacks a synchronous hemostasis function during mechanical cutting and the operation is cumbersome and prone to damage deep tissues when using an argon knife to excise lesions.

[0005] The present utility model realizes the above object through the following technical solutions: A digestive endoscope cutting device includes an endoscope handle and an endoscope tube connected to each other. A cutting assembly is arranged at the movable front end of the endoscope tube. A negative pressure suction cover is arranged inside the endoscope tube, and the negative pressure suction cover is communicated with the cutting assembly. The endoscope handle is integrated with a suction interface, an argon gas delivery joint, a cleaning water delivery joint, a driving motor, and a high-frequency electric generator;

[0006] The cutting assembly includes a rotating cutter head and a fixed ring seat. A micro bearing is connected between the rotating cutter head and the fixed ring seat. A plurality of argon gas nozzle channels are opened inside the rotating cutter head. The jet ports of the argon gas nozzle channels are located on the inner side surface of the rotating cutter head. The rotating cutter head is connected with a plurality of tungsten electrodes. The tungsten electrodes and the argon gas nozzle channels are arranged at intervals in a ring shape on the inner side surface of the rotating cutter head. A conductive slip ring is rotatably connected to the outer side wall of the rotating cutter head. The tail ends of the tungsten electrodes are slidably docked with the conductive slip ring. A driving unit is arranged on the outer side wall of the rotating cutter head;

[0007] A plurality of spray pipes distributed evenly in a ring shape are movably connected to the inner side surface of the fixed ring seat. A micro camera is connected to the body of the negative pressure suction cover. A suction channel is opened on the body of the endoscope tube, and the suction port of the suction channel is located at the inner side arc surface of the front end of the endoscope tube.

[0008] As a further scheme of the present utility model: A negative pressure suction pipe, an argon gas delivery pipe, and a cleaning water pipe are arranged inside the endoscope tube. One end of the negative pressure suction pipe is communicated with the negative pressure suction cover, and the other end of the negative pressure suction pipe is communicated with the suction interface integrated in the endoscope handle. One end of the argon gas delivery pipe is communicated with the argon gas nozzle channel, and the other end of the argon gas delivery pipe is communicated with the argon gas delivery joint integrated in the endoscope handle. One end of the cleaning water pipe is communicated with the spray pipe, and the other end of the cleaning water pipe is communicated with the cleaning water delivery joint integrated in the endoscope handle.

[0009] As a further scheme of the present utility model: A flexible limit pad is also arranged inside the endoscope tube. The flexible limit pad is connected to the inner wall of the endoscope tube in a layered manner. The bodies of the negative pressure suction pipe, the argon gas delivery pipe, and the cleaning water pipe all penetrate through the flexible limit pad.

[0010] As a further scheme of the present utility model: The driving unit includes a flexible spiral transmission shaft and a driving gear. A ring-shaped rack is arranged on the outer side wall of the rotating cutter head. The driving gear is meshed and connected with the ring-shaped rack. One end of the flexible spiral transmission shaft is coaxially and fixedly connected with the driving gear, and the other end of the flexible spiral transmission shaft is coaxially and fixedly connected with the rotating shaft of the driving motor integrated in the endoscope handle. The shaft body of the flexible spiral transmission shaft penetrates through the flexible limit pad.

[0011] As a further solution of the present utility model: a rotary cutting placement groove, a slip ring placement groove, and a gear placement groove are provided on the inner wall of the movable end of the endoscopic tube. A delivery tube channel, a water pipe channel, and a transmission shaft channel are provided on the tube body of the movable end of the endoscopic tube, and the tail end opening parts of the delivery tube channel, the water pipe channel, and the transmission shaft channel are all located on the inner wall of the endoscopic tube.

[0012] As a further solution of the present utility model: a high-frequency current wire is embedded in the tube body of the endoscopic tube. One end of the high-frequency current wire is electrically connected to the conductive slip ring, and the other end of the high-frequency current wire is electrically connected to the high-frequency electric generator integrated in the endoscopic handle.

[0013] As a further solution of the present utility model: a cavity is provided in the rotary cutting head of the rotary cutting assembly and the fixed ring seat and is communicated with each other. A ring-shaped partition is arranged in the cavity of the fixed ring seat. One side cavity of the ring-shaped partition is communicated between the argon gas nozzle channel and the argon gas delivery tube, and the other side cavity of the ring-shaped partition is communicated between the nozzle tube and the cleaning water pipe.

[0014] As a further solution of the present utility model: a nozzle tube through groove is provided on the inner side surface of the fixed ring seat. The nozzle tube movably penetrates through the nozzle tube through groove. Outer convex edges are provided at both ends of the nozzle tube. A compression spring is sleeved on the tube body of the nozzle tube located inside the fixed ring seat. A plurality of annularly and evenly distributed spray holes are provided on the tube body of the nozzle tube located at the nozzle tube through groove part in the initial state.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. The present utility model is provided with an endoscopic handle and an endoscopic tube. A rotary cutting assembly is provided at the movable front end of the endoscopic tube, and a negative pressure suction cover is provided inside the endoscopic tube. By inserting the endoscopic tube into the digestive tract of a patient, the rotary cutting assembly at the front end of the endoscopic tube cuts the lesion part in the digestive tract. When facing circumferential or large-area lesions, the rotary cutting method is adopted, which is convenient for operation, without repeatedly adjusting the angle and position of the endoscope, avoiding damage to deep tissues during the cutting operation. The excised lesion tissue can be sucked away by the negative pressure suction cover, realizing the cleaning of the excised lesion, and at the same time, the digestive juice tissue at the lesion part can be sucked away, facilitating the smooth progress of the cutting operation;

[0017] 2. The rotary cutting assembly provided in the present utility model includes a rotary cutter head and a fixed ring seat. A plurality of argon nozzle channels are provided inside the rotary cutter head. The rotary cutter head is connected with a plurality of tungsten electrodes. A conductive slip ring is rotatably connected to the outer side wall of the rotary cutter head, and a driving unit is arranged on the outer side wall of the rotary cutter head. When the rotary cutter head rotates, argon is continuously ejected from the argon nozzle channels, and the tungsten electrodes discharge through the high-frequency current provided by the conductive slip ring to ionize argon, forming a circumferentially uniform plasma beam, realizing "dead angle-free" cutting, and capable of stopping bleeding at the incision site while performing rotary cutting. By rotating the rotary cutter head to generate an annular plasma beam, the cutting range is expanded and the efficiency is improved, especially suitable for the resection of circumferential or large-area lesions. Moreover, the argon nozzle channels eject argon while rotating, which can form an air flow vortex, enhance the stability of the plasma beam and blow away tissue eschar, reducing adhesion. It should be noted that the front ends of the tungsten electrodes are convexly arranged on the inner side surface of the rotary cutter head. The surfaces of the tungsten electrodes are covered with high-temperature resistant insulating layers, and only the tips are exposed to form a discharge area, and the tips of the tungsten electrodes protrude from the plane of the argon nozzle channels to ensure that the discharge takes precedence over the air flow;

[0018] 3. A plurality of spray pipes evenly distributed in a ring shape are movably connected to the inner side surface of the fixed ring seat provided in the present utility model. A micro camera is connected to the body of the negative pressure suction cover. A suction channel is provided in the body of the endoscopic pipeline, and the suction port of the suction channel is located at the inner arc surface of the front end of the endoscopic pipeline. The micro camera is used to accurately determine the lesion site in the patient's digestive tract, so as to ensure that the rotary cutting is performed accurately on the lesion site. At the same time, the spray pipes can spray water as needed. The sprayed water can clean the inner wall of the negative pressure suction cover and the lens end of the micro camera, ensuring that the real-time picture in the digestive tract can be clearly seen. And the sprayed water can also be sucked away by the negative pressure suction cover, without affecting the resection operation. When the front end of the endoscopic pipeline is aligned with the lesion site for resection, the front end of the endoscopic pipeline is closely attached to the periphery of the lesion. Therefore, through the provided suction channel, part of the digestive fluid tissue can be sucked away from the periphery of the lesion, and at the same time, the smoke and part of the tiny tissue debris generated during the resection process can be sucked away by the suction channel, that is, the smoke will be sucked away from the bottom of the lesion, and the smoke will not affect the lens picture of the micro camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is a schematic cross-sectional structure diagram of the front end of the endoscopic pipeline of the present utility model;

[0021] Figure 3 is a schematic cross-sectional structure diagram of the body of the front end of the endoscopic pipeline of the present utility model;

[0022] Figure 4 of the present utility model Figure 2Schematic diagram of the structure at position A in [device name];

[0023] Figure 5 This utility model Figure 2 Schematic diagram of the structure at position B in [device name];

[0024] Figure 6 Schematic diagram of the connection structure between the rotary cutting assembly and the driving gear of this utility model;

[0025] Figure 7 Schematic diagram of the connection structure between the rotary cutting head and the conductive slip ring of this utility model;

[0026] Figure 8 Schematic diagram of the sectional structure of the connection part between the nozzle and the fixed ring seat of this utility model;

[0027] Figure 9 Schematic diagram of the disassembled state structure between the nozzle and the fixed ring seat of this utility model.

[0028] In the figure: 1, endoscope handle; 2, endoscope pipeline; 21, flexible limit pad; 22, suction channel; 23, rotary cutting placement groove; 24, slip ring placement groove; 25, gear placement groove; 26, delivery pipe channel; 27, water pipe channel; 28, transmission shaft channel; 3, negative pressure suction cover; 31, micro camera; 4, negative pressure suction pipe; 5, rotary cutting assembly; 51, rotary cutting head; 52, micro bearing; 53, fixed ring seat; 54, annular partition; 55, argon nozzle channel; 56, tungsten electrode; 57, conductive slip ring; 58, nozzle; 59, annular rack; 510, nozzle through slot; 511, compression spring; 512, spray hole; 513, high-frequency current wire; 6, argon delivery pipe; 7, cleaning water pipe; 8, flexible spiral transmission shaft; 81, driving gear. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment 1

[0031] As shown in Figures 1 to 9As shown in the figure, a digestive endoscope rotary cutting device includes an endoscope handle 1 and an endoscope tube 2 which are connected. A rotary cutting assembly 5 is arranged at the movable front end of the endoscope tube 2. A negative pressure suction cover 3 is arranged inside the endoscope tube 2. The negative pressure suction cover 3 is communicated with the rotary cutting assembly 5. The endoscope handle 1 is integrated with a suction interface, an argon gas delivery joint, a cleaning water delivery joint, a drive motor, and a high-frequency electric generator. When in use, by inserting the endoscope tube 2 into the digestive tract of a patient, the rotary cutting assembly 5 at the front end of the endoscope tube 2 can excise the lesion site in the digestive tract. When facing circumferential or large-area lesions, the rotary cutting method is convenient for operation, without repeatedly adjusting the angle and position of the endoscope, avoiding damage to deep tissues during the excision operation. The excised lesion tissue can be sucked away by the negative pressure suction cover 3, realizing the cleaning of the excised lesion, and at the same time, the digestive fluid tissue at the lesion site can be sucked away, facilitating the smooth progress of the excision operation;

[0032] The rotary cutting assembly 5 includes a rotary cutter head 51 and a fixed ring seat 53. A micro bearing 52 is connected between the rotary cutter head 51 and the fixed ring seat 53. A plurality of argon gas nozzle channels 55 are formed inside the rotary cutter head 51. The jet ports of the argon gas nozzle channels 55 are located on the inner side surface of the rotary cutter head 51. The rotary cutter head 51 is connected with a plurality of tungsten electrodes 56. The tungsten electrodes 56 and the argon gas nozzle channels 55 are arranged at intervals in a ring shape on the inner side surface of the rotary cutter head 51. A conductive slip ring 57 is rotatably connected to the outer side wall of the rotary cutter head 51. The tail ends of the tungsten electrodes 56 are slidably docked with the conductive slip ring 57. A drive unit is arranged on the outer side wall of the rotary cutter head 51. The rotary cutter head 51 is rotatably connected with the fixed ring seat 53 through the micro bearing 52. Thus, under the action of the drive unit, the rotary cutter head 51 can be driven to rotate. When the rotary cutter head 51 rotates, the argon gas nozzle channels 55 continuously eject argon gas, and the tungsten electrodes 56 discharge through the high-frequency current provided by the conductive slip ring 57 to ionize the argon gas, forming a circumferentially uniform plasma beam, realizing 360° dead-angle-free cutting, and being able to stop bleeding at the incision site while rotating and cutting. By rotating the rotary cutter head 51 to generate an annular plasma beam, the cutting range is expanded and the efficiency is improved, especially suitable for the excision of circumferential or large-area lesions. And the argon gas nozzle channels 55 eject argon gas while rotating, which can form an air flow vortex, enhance the stability of the plasma beam and blow away tissue scabs, reducing adhesion. It should be noted that the front ends of the tungsten electrodes 56 are convex on the inner side surface of the rotary cutter head 51. The surfaces of the tungsten electrodes 56 are covered with a high-temperature resistant insulating layer, and only the tips are exposed to form a discharge area, and the tips of the tungsten electrodes 56 protrude from the plane of the argon gas nozzle channels 55 to ensure that the discharge is prior to the air flow.

[0033] A number of spray pipes 58 evenly distributed in a ring shape are movably connected to the inner side surface of the fixed ring seat 53. A micro camera 31 is connected to the body of the negative pressure suction cover 3. A suction channel 22 is provided on the body of the endoscope tube 2, and the suction port of the suction channel 22 is located at the inner arc surface of the front end of the endoscope tube 2. The micro camera 31 is used to accurately determine the lesion site in the patient's digestive tract, so as to ensure that the cutting is performed accurately on the lesion site. At the same time, the spray pipes 58 can spray water as needed. The sprayed water can clean the inner wall of the cover of the negative pressure suction cover 3 and the lens end of the micro camera 31, ensuring that the real-time picture in the digestive tract can be clearly seen. And the sprayed water can also be sucked away by the negative pressure suction cover 3, without affecting the resection operation. When the front end of the endoscope tube 2 is aligned with the lesion site for resection, the front end of the endoscope tube 2 is closely attached to the periphery of the lesion. Therefore, through the suction channel 22 provided, part of the digestive fluid tissue can be sucked away from the periphery of the lesion. At the same time, the smoke and some tiny tissue debris generated during the resection process can be sucked away by the suction channel 22, that is, the smoke will be sucked away from the bottom of the lesion, and the smoke will not affect the lens picture of the micro camera 31.

[0034] Embodiment 2

[0035] Improved on the basis of Embodiment 1:

[0036] As Figure 2 、 Figure 4 and Figure 5 shown, a negative pressure suction pipe 4, an argon delivery pipe 6 and a cleaning water pipe 7 are arranged in the endoscope tube 2. One end of the negative pressure suction pipe 4 is communicated with the negative pressure suction cover 3, and the other end of the negative pressure suction pipe 4 is communicated with the suction interface integrated in the endoscope handle 1. One end of the argon delivery pipe 6 is communicated with the argon spray port channel 55, and the other end of the argon delivery pipe 6 is communicated with the argon delivery joint integrated in the endoscope handle 1. One end of the cleaning water pipe 7 is communicated with the spray pipe 58, and the other end of the cleaning water pipe 7 is communicated with the cleaning water delivery joint integrated in the endoscope handle 1, so as to be able to deliver argon through the argon delivery pipe 6 to meet the need for argon resection of the lesion site, deliver cleaning water through the cleaning water pipe 7 to meet the need for cleaning the inner wall of the cover of the negative pressure suction cover 3 and the lens end of the micro camera 31, and clean the lesion tissue and the like sucked inside the cover of the negative pressure suction cover 3 through the negative pressure suction pipe 4.

[0037] Further, a flexible limiting pad 21 is also arranged inside the endoscope tube 2. The flexible limiting pad 21 is connected to the inner wall of the endoscope tube 2 in a layered manner. The tube bodies of the negative pressure suction tube 4, the argon gas delivery tube 6, and the cleaning water pipe 7 all penetrate through the flexible limiting pad 21. The flexible limiting pad 21 is used to limit the tube bodies of the negative pressure suction tube 4, the argon gas delivery tube 6, and the cleaning water pipe 7 at multiple points. Thus, when the endoscope tube 2 is bent in an arc, the negative pressure suction tube 4, the argon gas delivery tube 6, and the cleaning water pipe 7 will also bend in an arc accordingly, avoiding the situation where the negative pressure suction tube 4, the argon gas delivery tube 6, and the cleaning water pipe 7 are bent inside the endoscope tube 2 and causing blockage.

[0038] As Figure 2 , Figure 4 and Figure 6 shown, the driving unit includes a flexible spiral transmission shaft 8 and a driving gear 81. A ring-shaped rack 59 is arranged on the outer side wall of the rotary cutter head 51. The driving gear 81 is meshed and connected with the ring-shaped rack 59. One end of the flexible spiral transmission shaft 8 is fixedly connected to the driving gear 81 coaxially. The other end of the flexible spiral transmission shaft 8 is fixedly connected to the rotating shaft of the driving motor integrated in the endoscope handle 1 coaxially. The shaft body of the flexible spiral transmission shaft 8 penetrates through the flexible limiting pad 21, so as to output power by operating the driving motor of the endoscope handle 1. Then, the driving gear 81 can be driven to rotate via the flexible spiral transmission shaft 8. With the meshing action of the driving gear 81 and the ring-shaped rack 59, the rotary driving of the rotary cutter head 51 can be realized, that is, the rotary cutting of the lesion can be achieved, and the flexible limiting pad 21 can limit and fix the shaft body of the flexible spiral transmission shaft 8.

[0039] As Figure 1 , Figure 2 and Figure 3 shown, a rotary cutting placement groove 23, a slip ring placement groove 24, and a gear placement groove 25 are arranged on the inner wall of the movable end of the endoscope tube 2. A delivery tube channel 26, a water pipe channel 27, and a transmission shaft channel 28 are arranged on the tube body of the movable end of the endoscope tube 2. And the tail end opening parts of the delivery tube channel 26, the water pipe channel 27, and the transmission shaft channel 28 are all located on the inner wall of the endoscope tube 2. The rotary cutting assembly 5, the conductive slip ring 57, and the driving gear 81 can be respectively placed and arranged in the respective placement grooves through the arranged placement grooves, realizing the positioning and installation of each component. And the argon gas delivery tube 6, the cleaning water pipe 7, and the flexible spiral transmission shaft 8 are respectively passed through the respective channels, so as to realize that the connection parts between the components are arranged inside the tube body of the endoscope tube 2, ensuring the firmness of the connection parts.

[0040] As Figure 1 , Figure 2 and Figure 4As shown, a high-frequency current wire 513 is embedded in the body of the endoscopic channel 2. One end of the high-frequency current wire 513 is electrically connected to the conductive slip ring 57, and the other end of the high-frequency current wire 513 is electrically connected to a high-frequency electric generator integrated in the endoscopic handle 1, so as to be able to provide high-frequency current to the conductive slip ring 57 by manipulating the endoscopic handle 1, and then supply power to the tungsten electrode 56 through the conductive slip ring 57, and a discharge area can be formed at the tip of the tungsten electrode 56 to ionize argon, realizing the rotational cutting of argon plasma beam on the lesion.

[0041] As Figure 1 , Figure 4 , Figure 5 , Figure 8 and Figure 9 As shown, a cavity is formed in the fixed ring seat 53 that is connected and communicated with the rotary cutter head 51 of the rotary cutting assembly 5, and an annular partition 54 is arranged in the cavity of the fixed ring seat 53. One side cavity of the annular partition 54 is communicated between the argon nozzle channel 55 and the argon delivery pipe 6, and the other side cavity of the annular partition 54 is communicated between the spray pipe 58 and the cleaning water pipe 7. The cavity is divided into two independent cavities by the arranged annular partition 54, so that argon can be transported into one of the cavities and ejected through the argon nozzle channel 55, and the cleaning water can be transported into the other cavity and ejected through the spray pipe 58.

[0042] Furthermore, a spray pipe through groove 510 is formed on the inner side surface of the fixed ring seat 53. The spray pipe 58 movably penetrates through the spray pipe through groove 510. Outer convex edges are arranged at both ends of the spray pipe 58. A compression spring 511 is sleeved on the pipe body of the spray pipe 58 located inside the fixed ring seat 53. A plurality of annularly and evenly distributed spray holes 512 are formed on the pipe body of the spray pipe 58 at the position of the spray pipe through groove 510 in the initial state. When the cleaning water is transported into the cavity of the fixed ring seat 53, the water pressure increases due to the continuous transportation of the cleaning water, and the spray pipe 58 can be pushed outwards, so that the spray holes 512 can be exposed, realizing the ejection of the cleaning water. After the cleaning is completed, the water pressure of the cleaning water drops, and under the action of the compression spring 511, the spray pipe 58 can return to the initial state, forming a blockage of the spray holes 512, that is, it can prevent the digestive juice tissue in the digestive tract from seeping into the cavity of the fixed ring seat 53 through the spray holes 512.

[0043] Working principle: By inserting the endoscope tube 2 into the digestive tract of the patient, the rotary cutting assembly 5 at the front end of the endoscope tube 2 excises the lesion site in the digestive tract. Under the action of the driving unit, the rotary cutter head 51 is driven to rotate. When the rotary cutter head 51 rotates, argon is continuously ejected from the argon nozzle channel 55, and the tungsten electrode 56 discharges through the high-frequency current provided by the conductive slip ring 57 to ionize argon, forming a circumferentially uniform plasma beam, achieving 360° dead-angle-free cutting, and capable of achieving hemostasis at the incision site while rotating and cutting. By rotating the rotary cutter head 51 to generate an annular plasma beam, the cutting range is expanded and the efficiency is improved, especially suitable for the excision of circumferential or large-area lesions. Moreover, the argon nozzle channel 55 ejects argon while rotating, capable of forming an air flow vortex, enhancing the stability of the plasma beam and blowing away tissue scabs, reducing adhesion. The excised lesion tissue can be sucked away by the negative pressure suction hood 3, realizing the cleaning of the excised lesion, and capable of synchronously sucking away the digestive fluid tissue at the lesion site, facilitating the smooth progress of the excision operation. And the micro camera 31 provided can accurately determine the lesion site in the patient's digestive tract, thereby ensuring that the rotary cutting is aligned with the lesion site. At the same time, the spray pipe 58 provided can spray water as needed. The sprayed water can clean the inner wall of the hood of the negative pressure suction hood 3 and the lens end of the micro camera 31, ensuring that the real-time picture in the digestive tract can be clearly seen. And the sprayed water can also be sucked away by the negative pressure suction hood 3, without affecting the progress of the excision operation. And when the front end of the endoscope tube 2 is aligned with the lesion site for excision, the front end of the endoscope tube 2 is closely attached to the periphery of the lesion. Therefore, through the suction channel 22 opened, part of the digestive fluid tissue can be sucked away from the periphery of the lesion. At the same time, the smoke and part of the tiny tissue debris generated during the excision process can be sucked away by the suction channel 22, that is, the smoke will be sucked away from the bottom of the lesion, and the smoke will not affect the lens picture of the micro camera 31.

[0044] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed by the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0045] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A digestive endoscope rotary cutting device, comprising an endoscope handle (1) and an endoscope tube (2) connected to each other, characterized in that: The movable front end of the endoscope tube (2) is provided with a rotary cutting assembly (5). A negative pressure suction hood (3) is arranged inside the endoscope tube (2). The negative pressure suction hood (3) is communicated with the rotary cutting assembly (5). The endoscope handle (1) is integrated with a suction interface, an argon gas delivery joint, a cleaning water delivery joint, a drive motor, and a high-frequency electric generator; The rotary cutting assembly (5) includes a rotary cutter head (51) and a fixed ring seat (53). A micro bearing (52) is connected between the rotary cutter head (51) and the fixed ring seat (53). A plurality of argon gas nozzle channels (55) are opened inside the rotary cutter head (51). The jet ports of the argon gas nozzle channels (55) are located on the inner side surface of the rotary cutter head (51). The rotary cutter head (51) is connected with a plurality of tungsten electrodes (56). The tungsten electrodes (56) and the argon gas nozzle channels (55) are arranged at intervals in a ring shape on the inner side surface of the rotary cutter head (51). A conductive slip ring (57) is rotatably connected to the outer side wall of the rotary cutter head (51). The tail ends of the tungsten electrodes (56) are slidably docked with the conductive slip ring (57). A drive unit is arranged on the outer side wall of the rotary cutter head (51); A plurality of spray pipes (58) evenly distributed in a ring shape are movably connected to the inner side surface of the fixed ring seat (53). A micro camera (31) is connected to the body of the negative pressure suction hood (3). A suction channel (22) is opened on the body of the endoscope tube (2). The suction port of the suction channel (22) is located on the inner arc surface at the front end of the endoscope tube (2).

2. The endoscopic rotary cutting device according to claim 1, wherein: A negative pressure suction pipe (4), an argon gas delivery pipe (6), and a cleaning water pipe (7) are arranged inside the endoscope tube (2). One end of the negative pressure suction pipe (4) is communicated with the negative pressure suction hood (3). The other end of the negative pressure suction pipe (4) is communicated with the suction interface integrated in the endoscope handle (1). One end of the argon gas delivery pipe (6) is communicated with the argon gas nozzle channels (55). The other end of the argon gas delivery pipe (6) is communicated with the argon gas delivery joint integrated in the endoscope handle (1). One end of the cleaning water pipe (7) is communicated with the spray pipes (58). The other end of the cleaning water pipe (7) is communicated with the cleaning water delivery joint integrated in the endoscope handle (1).

3. The endoscopic rotary cutting device according to claim 2, wherein: A flexible limiting pad (21) is also arranged inside the endoscope tube (2). The flexible limiting pad (21) is connected to the inner wall of the endoscope tube (2) in a layered manner. The bodies of the negative pressure suction pipe (4), the argon gas delivery pipe (6), and the cleaning water pipe (7) all penetrate through the flexible limiting pad (21).

4. The endoscopic digestion rotary cutting device according to claim 3, wherein: The drive unit includes a flexible spiral transmission shaft (8) and a drive gear (81). A ring-shaped rack (59) is arranged on the outer side wall of the rotary cutter head (51). The drive gear (81) is meshed and connected with the ring-shaped rack (59). One end of the flexible spiral transmission shaft (8) is fixedly connected to the drive gear (81) coaxially. The other end of the flexible spiral transmission shaft (8) is fixedly connected to the rotating shaft of the drive motor integrated in the endoscope handle (1) coaxially. The shaft body of the flexible spiral transmission shaft (8) penetrates through the flexible limiting pad (21).

5. The endoscopic digestion rotary cutting device according to claim 1, wherein: The inner wall of the movable end of the endoscope tube (2) is provided with a rotary cutting placement groove (23), a slip ring placement groove (24), and a gear placement groove (25). The body of the movable end of the endoscope tube (2) is provided with a delivery tube channel (26), a water pipe channel (27), and a drive shaft channel (28). The tail end opening parts of the delivery tube channel (26), the water pipe channel (27), and the drive shaft channel (28) are all located on the inner wall of the endoscope tube (2).

6. The endoscopic rotary cutting device according to claim 1, wherein: A high-frequency current wire (513) is embedded in the body of the endoscope tube (2). One end of the high-frequency current wire (513) is electrically connected to a conductive slip ring (57), and the other end of the high-frequency current wire (513) is electrically connected to a high-frequency electric generator integrated in the endoscope handle (1).

7. The endoscopic rotary cutting device according to claim 2, characterized in that: A cavity is formed by the rotary cutter head (51) of the rotary cutting assembly (5) and the fixed ring seat (53) and is communicated. A ring-shaped partition (54) is arranged in the cavity of the fixed ring seat (53). One side cavity of the ring-shaped partition (54) is communicated between the argon nozzle channel (55) and the argon delivery tube (6), and the other side cavity of the ring-shaped partition (54) is communicated between the nozzle (58) and the cleaning water pipe (7).

8. The endoscopic rotary cutting device according to claim 7, characterized in that: A nozzle through groove (510) is formed on the inner side surface of the fixed ring seat (53). The nozzle (58) movably penetrates through the nozzle through groove (510). Outer convex edges are arranged at both ends of the nozzle (58). A compression spring (511) is sleeved on the body of the nozzle (58) located in the fixed ring seat (53). A plurality of annularly and evenly distributed spray holes (512) are formed in the body of the nozzle (58) at the position of the nozzle through groove (510) in the initial state.

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