Medical instrument

Abstract

The utility model discloses a medical instrument which comprises a forceps head assembly, a supporting tube assembly, a power plug and a handle assembly. One end of the forceps head assembly is connected with the far end of the supporting tube assembly, and the near end of the supporting tube assembly is connected with the handle assembly. The handle assembly comprises a first movable handle, a second movable handle and a fixed handle, the first movable handle and the second movable handle are in sliding connection with the fixed handle, and the first movable handle and the second movable handle can slide left and right relative to the fixed handle; the first movable handle is provided with a cavity, and one end of the power plug is arranged in the cavity; the supporting pipe assembly is formed by sleeving a driving rope, a smooth layer, a supporting pipe and an insulating pipe from inside to outside, and the smooth layer is arranged outside the driving rope; the driving rope is used for controlling opening and closing actions of the tong head assembly, and a plurality of threads with unequal screw pitches are arranged on the outer wall of the supporting pipe; the power plug is electrically connected with the tong head assembly through the driving rope. The medical instrument has the functions of biopsy forceps and an electrocoagulator at the same time.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more particularly to a medical device. Background Technology

[0002] The biliary and pancreatic biopsy forceps are a commonly used medical instrument in endoscopic examinations and treatments of the biliary and pancreatic systems. They are primarily used to grasp tissue samples from the bile duct or pancreas. During biliary and pancreatic surgery, after using the forceps to grasp the tissue sample, the surgeon typically switches to an electrocoagulator to cut and stop bleeding at the sampling site. However, the frequent switching between the forceps and the electrocoagulator throughout the procedure prolongs the operation and may increase patient discomfort and risks, potentially affecting the safety and effectiveness of the surgery. Utility Model Content

[0003] This invention provides a medical device to solve the problem in related technologies that require frequent alternation between bile and pancreatic biopsy forceps and electrocoagulation devices.

[0004] According to an embodiment of the present invention, a medical device is provided, comprising: a forceps assembly, a support tube assembly, a power plug, and a handle assembly; one end of the forceps assembly is connected to the distal end of the support tube assembly, and the proximal end of the support tube assembly is connected to the handle assembly;

[0005] The handle assembly includes a first movable handle, a second movable handle, and a fixed handle. The first movable handle and the second movable handle are slidably connected to the fixed handle, and the first movable handle and the second movable handle can slide left and right relative to the fixed handle.

[0006] The first movable handle has a cavity, and one end of the power plug is located inside the cavity;

[0007] The support tube assembly is composed of a drive rope, a smooth layer, a support tube, and an insulating tube, from the inside out. The smooth layer is disposed on the outside of the drive rope to reduce the frictional resistance generated when the drive rope slides on the inner wall of the smooth layer.

[0008] The drive rope is used to control the opening and closing action of the pliers assembly, and the outer wall of the support tube is provided with multiple threads of unequal pitch.

[0009] The power plug is electrically connected to the pliers assembly via the drive cord.

[0010] In one possible implementation, the outer wall of the insulating tube is smooth.

[0011] In one possible implementation, the diameters of the clamp assembly and the support tube assembly are less than 1 mm.

[0012] In one possible implementation, a first pipe segment, a second pipe segment, and a third pipe segment are sequentially provided on the outer wall of the support pipe from the distal end to the proximal end.

[0013] The outer side of the first pipe section is provided with multiple first threads of the first pitch;

[0014] The outer side of the second pipe section is provided with multiple second threads of a second pitch, wherein the first pitch is smaller than the second pitch;

[0015] The outer side of the third pipe section is unthreaded.

[0016] In one feasible approach

[0017] The total length of the support tube ranges from 0.5 meters to 4 meters;

[0018] The length of the first pipe segment ranges from 10 cm to 50 cm, and the pitch of the first thread ranges from 2 mm to 4 mm.

[0019] The second pipe section ranges from 150 cm to 300 cm, and the second pitch ranges from 3 mm to 6 mm;

[0020] The minimum thread width of the first and second threads is 0.01 mm to 0.05 mm;

[0021] The length of the third pipe section ranges from 5 centimeters to 15 centimeters.

[0022] In one possible implementation, the length of the first pipe segment is 40 centimeters, and the first pitch is 3 millimeters.

[0023] The outer side of the second pipe section is provided with multiple second threads of the second pitch. The length of the second pipe section is 241 cm, and the second thread pitch is 5 mm.

[0024] The widths of the first thread and the second thread are both 0.02 mm.

[0025] The outer side of the third pipe section is unthreaded.

[0026] In one possible implementation, the bending degree of the first pipe segment is greater than 0° and less than or equal to 180° U-shape.

[0027] In one possible implementation, the pliers assembly includes a first pliers head, a second pliers head, a pliers head holder, and a first retaining pin;

[0028] The tail of the first pliers head is provided with a first arc-shaped groove that matches the first fixing pin, and the tail of the second pliers head is provided with a second arc-shaped groove that matches the first fixing pin. The first pliers head is provided with a first connecting hole, and the second pliers head is provided with a second connecting hole. The pliers head frame is provided with a pivot pin hole. The first fixing pin passes through the pivot pin hole, the first connecting hole, the second connecting hole, and the first through hole in sequence, so that the first pliers head and the second pliers head are slidably hinged to the pliers head frame and the drive rope around the axis of the first fixing pin.

[0029] In one possible implementation, the pliers assembly includes a third pliers, a fourth pliers, a second fixing pin, a third fixing pin, a fourth fixing pin, a first connecting rod, a second connecting rod, and a pliers holder. The pliers holder has the pin hole, the third pliers has the third connecting hole, the fourth pliers has the fourth connecting hole, and the distal end of the drive rope has a first through hole. The second fixing pin passes through the pin hole, the fourth connecting hole, the third connecting hole, and the first through hole sequentially from top to bottom, thereby allowing the third and fourth pliers to be slidably hinged to the pliers holder and the drive rope around the axis of the second fixing pin.

[0030] In one possible implementation, the pliers assembly includes a fifth pliers head, a sixth pliers head, a first metal wire, a second metal wire, a fifth fixing pin, and a pliers head frame; the pliers head frame has a pivot pin hole, the fifth pliers head has a fifth connecting hole, the sixth pliers head has a sixth connecting hole, and the distal end of the drive rope has a first through hole; wherein, the fifth fixing pin passes through the pivot pin hole, the sixth connecting hole, the fifth connecting hole, and the first through hole sequentially from top to bottom, so that the fifth pliers head and the sixth pliers head are slidably hinged around the axis of the fifth fixing pin, and the drive rope is hinged to the pliers head frame;

[0031] The fifth and sixth jaws are respectively provided with a second through hole and a third through hole at their tails. One end of the first metal wire is bent, and one end of the second metal wire is bent. The bent end of the first metal wire is inserted and connected to the second through hole at the tail of the fifth jaw, and the bent end of the second metal wire is inserted and connected to the third through hole at the tail of the sixth jaw. The other ends of the first and second metal wires are fixedly connected to one end of the drive rope.

[0032] In one possible implementation, the first jaw is provided with a plurality of first biting teeth, which are arranged sequentially on both sides of the outer periphery of the receiving groove of the first jaw, and the second jaw is provided with a plurality of second biting teeth, which are arranged sequentially on both sides of the outer periphery of the receiving groove of the second jaw, wherein when the jaw assembly is in the closed state, the first biting teeth and the second biting teeth on the second jaw can fully engage.

[0033] In one possible implementation, the insulating tube is a heat-shrink tubing and wraps around the support tube.

[0034] This utility model provides a medical device comprising: a forceps assembly, a support tube assembly, a power plug, and a handle assembly; one end of the forceps assembly is connected to the distal end of the support tube assembly, and the proximal end of the support tube assembly is connected to the handle assembly. A cavity is provided on the first movable handle, and one end of the power plug is disposed within the cavity; the support tube assembly is composed of a drive rope, a smooth layer, a support tube, and an insulating tube, arranged from the inside out. The smooth layer is disposed outside the drive rope to reduce the frictional resistance generated when the drive rope slides on the inner wall of the smooth layer. The power plug is electrically connected to the forceps assembly through the drive rope, thereby avoiding the problem of frequently alternating between the use of a biliary and pancreatic biopsy forceps and an electrocoagulator. Only one device is needed to realize the functions of a biliary and pancreatic biopsy forceps and an electrocoagulator. Attached Figure Description

[0035] The above and other objects, features, and advantages of embodiments of this application will become more readily understood through the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the application will be described by way of example and non-limitation, wherein:

[0036] Figure 1 A schematic diagram of the structure of the medical device provided in the embodiment of this utility model;

[0037] Figure 2 A cross-sectional structural schematic diagram of the medical device provided in an embodiment of this utility model;

[0038] Figure 3 This is a cross-sectional view of the support tube assembly provided in an embodiment of the present invention from a first perspective.

[0039] Figure 4 A schematic diagram of unequal pitch threads on a support tube provided for an embodiment of this utility model;

[0040] Figure 5 A schematic diagram of the current loop formed when the power plug is powered on, provided for an embodiment of this utility model;

[0041] Figure 6A schematic diagram of the structure of the first type of clamp head assembly provided in this embodiment of the present utility model;

[0042] Figure 7 A schematic diagram illustrating the opening and closing of the pliers head assembly by sliding the movable handle left and right according to an embodiment of this utility model;

[0043] Figure 8 This is a schematic diagram of the structure of the second type of clamp head assembly provided in an embodiment of the present utility model;

[0044] Figure 9 A schematic diagram of the structure of the third type of clamp head assembly provided in this embodiment of the present utility model.

[0045] Figure label:

[0046] 10-Pliers head assembly; 20-Support tube assembly; 30-Power plug; 40-Handle assembly; 400-Moving handle; 401-First movable handle; 402-Second movable handle; 403-Fixed handle; 404-Cavity; 50-Sheath device; 110-First pliers head; 111-Second pliers head; 100-Pliers head holder; 112-First fixing pin; First arc groove 113; Second arc groove 114; 1001-Shaft pin hole; 1101-First connecting hole; 1110-Second connecting hole; 201-Insulating tube; 202-Support tube; 203-Smooth layer; 204-Drive rope; 2021-First tube segment; 2022-Second tube segment; 2023-Third tube segment; 2041-First through hole ; 1102-First biting tooth; 1112-Second biting tooth; 120-Third jaw; 121-Fourth jaw; 122-Second fixing pin; 123-Third fixing pin; 124-Fourth fixing pin; 125-First connecting rod; 126-Second connecting rod; 1201-Third connecting hole; 1211-Fourth connecting hole; 1202-Third biting tooth; 1212-Fourth biting tooth; 130-Fifth jaw; 131-Sixth jaw; 132-Fifth fixing pin; 133-First metal wire; 134-Second metal wire; 1201-Fifth connecting hole; 1211-Sixth connecting hole; 1302-Fifth biting tooth; 1312-Sixth biting tooth; 1303-Second through hole; 1313-Third through hole. Detailed Implementation

[0047] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0048] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] The following describes several alternative implementations of this disclosure in conjunction with the accompanying drawings. Those skilled in the art should understand that the following implementations are merely illustrative and not an exhaustive list. Based on these implementations, those skilled in the art may replace, splice, or combine certain features or examples, and these should still be considered as the disclosure content of this disclosure.

[0053] To address the problems existing in the aforementioned related technologies, this utility model provides a pancreatic biopsy forceps.

[0054] The following is in conjunction with the appendix Figure 1 -Appendix Figure 9 Detailed description of the embodiments of this utility model, Figure 1 This is a schematic diagram of the structure of the medical device provided in an embodiment of the present utility model. Figure 2 This is a cross-sectional structural diagram of the medical device provided in an embodiment of the present utility model. Figure 3 This is a cross-sectional view of the support tube assembly provided in an embodiment of the present invention from a first perspective. Figure 4 This is a schematic diagram of the unequal pitch threads on the support tube provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of the current loop formed when the power plug is powered on, as provided in an embodiment of the present invention. Figure 6 This is a schematic diagram of the structure of the first type of clamp head assembly provided in this embodiment of the present utility model. Figure 7 This is a schematic diagram illustrating the opening and closing of the pliers head assembly controlled by the left and right sliding of the movable handle, as provided in an embodiment of this utility model. Figure 8 This is a schematic diagram of the structure of the second type of clamp head assembly provided in this embodiment of the present invention. Figure 9 A schematic diagram of the structure of the third type of clamp head assembly provided in this embodiment of the present utility model.

[0055] It should be noted that in the description of the embodiments of this utility model, "proximal end" refers to the end that is close to the outside of the human body, that is, the proximal end of each component is the end of the component that is close to the handle assembly 40, and "distal end" refers to the end that is close to the inside of the human body, that is, the distal end of each component is the end of the component that is far away from the handle assembly 40.

[0056] refer to Figure 1 As shown in the embodiment of this application, the medical device can be used as a biliary and pancreatic biopsy forceps. It includes a forceps head assembly 10, a support tube assembly 20, a power plug 30, and a handle assembly 40. The forceps head assembly 10 is located at the front end of the device and is responsible for the actual clamping operation. The proximal end of the forceps head assembly 10 is connected to the distal end of the support tube assembly 20 via a mechanical connection or fixing structure. The support tube assembly 20 is an intermediate connector, mainly used for supporting and transmitting operating force. The distal end of the support tube assembly 20 is connected to the forceps head assembly 10 via an end connection, and the proximal end of the support tube assembly 20 is fixedly connected to the handle assembly 40.

[0057] The handle assembly 40 serves as the main operating component, allowing the user to control the pliers head assembly 10. The handle assembly includes a movable handle 400 and a fixed handle 403. The movable handle 400 comprises a first movable handle 401 and a second movable handle 402. The first movable handle 401 and the second movable handle 402 are approximately circular in shape, facilitating the insertion of fingers for appropriate operation.

[0058] The fixed handle 403 is kept in place to provide stable support for the first movable handle 401 and the second movable handle 402.

[0059] The first movable handle 401 and the second movable handle 402 are slidably connected to the fixed handle 403, allowing them to slide left and right along the fixed handle 403. The second movable handle 402 works in conjunction with the first movable handle 401 to perform clamping or other actions to manipulate the tissue.

[0060] A cavity 404 is axially provided at the front end of the first movable handle 401. The cavity 404 can be connected to the main body of the movable handle 400 by means of a snap, thread, or nesting design. The cavity 404 is used to accommodate a part of the power plug 30, which extends through the cavity 404 into the interior of the movable handle 400.

[0061] The power plug 30 is embedded in the cavity 404 of the first movable handle 401. The function of the power plug 30 is to provide power support for the medical device.

[0062] refer to Figure 2 As shown, a protective sleeve 50 is attached to the connection between the clamp head assembly 10 and the support tube assembly 20. This protective sleeve 50 protects the connection between the clamp head assembly 10 and the support tube assembly 20 from external damage. The protective sleeve 50 is typically made of wear-resistant and corrosion-resistant materials, such as medical-grade plastic, rubber, or Teflon. The protective sleeve 50 can be connected to the distal end of the handle assembly 40 using a snap-fit, threaded, or nested design. Figure 2 The image shows a threaded connection between the sheath device 50 and the support tube assembly 20.

[0063] refer to Figure 3 As shown, the support tube assembly 20 is a crucial transmission and insulation component of the entire device. Its design aims for miniaturization, high efficiency, and safety, making it particularly suitable for minimally invasive surgical procedures. The support tube assembly 20 consists of an insulating tube 201, a support tube 202, a smooth layer 203, and a drive rope 204, arranged from the outside in. The diameter of the support tube assembly 20 is less than 1 millimeter.

[0064] The following is a detailed description of the components and functions of the support tube assembly 20.

[0065] The insulating tube 201 can be a heat-shrink tubing that wraps around the support tube 202. A heat-shrink tubing is a plastic tube that shrinks when heated, allowing it to fit tightly against the surface of the support tube 202, forming an insulating layer. Alternatively, the insulating tube 201 can be an insulating tube fitted over the support tube 202. This insulating tube is typically made of insulating material, providing electrical insulation and effectively isolating current. This prevents current from being conducted through the support tube 202 to other parts of the patient's body, thus avoiding accidental electric shock or short circuits and ensuring the safety and effectiveness of the surgery. Furthermore, the smooth outer layer of the insulating tube 201 and the overall diameter of the support tube assembly 20 being less than 1 mm reduce pushing resistance, allowing the support tube assembly 20 to easily pass through narrow passages within the patient's body, thereby improving surgical efficiency.

[0066] The support tube 202 serves as a support structure, providing mechanical support for the support tube assembly 20.

[0067] The function of the smoothing layer 203 is to reduce the frictional resistance of the drive rope 204 as it moves inside the support tube 202, thereby improving transmission efficiency. The smoothing layer 203 is typically made of a low-friction material (such as polytetrafluoroethylene PTFE) to ensure smooth, low-resistance movement of the drive rope. The smoothing layer 203 also extends the service life of the drive rope and ensures sensitive operation.

[0068] The function of the drive rope 204 is to control the opening and closing of the jaws in the jaw assembly 10, and to transmit current from the power plug 30 to the jaw assembly 10. The drive rope 204 can be made of a high-strength, highly conductive metal material (such as stainless steel, nickel-titanium alloy, or steel wire rope) to ensure the stability of the transmitted force and good conductivity to guarantee stable current transmission. Through friction optimization design, the cooperation between the smooth layer 203 and the drive rope 204 significantly reduces the motion resistance by 1N-10N, ensuring lag-free force transmission, improving operational sensitivity and efficiency, and ensuring the rapid response of the jaw assembly 10.

[0069] refer to Figure 4As shown, the outer side of the support pipe 202 employs a threaded design with unequal pitch. Specifically, the outer side of the first pipe section 2021 on the support pipe 202 has multiple first threads with a first pitch, the outer side of the second pipe section 2022 on the support pipe 202 has multiple second threads with a second pitch, and the outer side of the third pipe section 2023 on the support pipe 202 has no machined threads. The first pitch is smaller than the second pitch. The threaded structure is manufactured through precision machining (such as engraving, turning, or cutting) or other suitable methods. One feasible method is to engrave the threads on the outer side of the support pipe. The design of different pitches aims to optimize the pipe's bending performance and support force. Pipe sections with smaller pitches have better bending performance and are suitable for passages with larger bends, while pipe sections with larger pitches provide higher support force and are suitable for wider or longer passages.

[0070] The support tube 202 with its unequal pitch design allows the entire support tube assembly 20 to achieve a good balance of flexibility and support when passing through complex passages within the human body. It provides sufficient support and allows for smooth passage, especially when navigating winding and complex passages such as those through the gallbladder and pancreas.

[0071] Preferably, in the medical device provided by this embodiment, the total length of the support tube 202 is 2.9 meters, wherein the first tube segment 2021 is 40 centimeters long, the second tube segment 2022 is 241 centimeters long, and the third tube segment 2023 is 9 centimeters long. The outer side of the first tube segment 2021 is engraved with multiple first threads with a first pitch of 3 millimeters and a thread width of 0.02 millimeters. The bending degree of the first tube segment is greater than 0° and less than or equal to a U-shape of 180°, meaning the maximum bending degree achievable by the first tube segment 2021 can reach a U-shape of 180°. The outer side of the second tube segment 2022 is engraved with multiple second threads with a second pitch of 5 millimeters and a thread width of 0.02 millimeters.

[0072] In practical applications, the total length of the support tube 202 can range from 0.5 meters to 4 meters. For some short-distance or localized surgeries, especially when only a short anatomical passage is needed, the length of the support tube 202 can be reduced accordingly, possibly as short as about 0.5 meters. This is suitable for relatively superficial surgeries or scenarios requiring shorter passages. The maximum length can reach 4 meters. For medical instruments that need to cover longer physiological passages (such as endoscopes or support tubes that need to pass through long structures like the gastrointestinal tract or bile ducts), the total length of the support tube 202 may need to be increased, potentially reaching a maximum of 4 meters. This is common in certain specialized medical applications, such as complex abdominal surgeries or endoscopic examinations requiring coverage of the entire gastrointestinal tract.

[0073] Regarding the length range of the first pipe segment 2021, a minimum length of 10 cm is recommended. For smaller channels or areas requiring shorter supports, the length of the first pipe segment 2021 can be shorter, especially when the channel is relatively straight or short. The maximum recommended length is 50 cm. If longer curved channels or longer bends are required, the length of the first pipe segment 2021 can be increased to 50 cm to improve the flexibility of the support pipe. Therefore, the length range of the first pipe segment 2021 can be from 10 cm to 50 cm.

[0074] Regarding the pitch range of the first thread, a minimum pitch of 2 mm is recommended. A smaller pitch results in a tighter thread spacing, providing better bending performance and making it suitable for areas requiring large bends. A minimum pitch of 2 mm facilitates passage through more curved channels. The maximum pitch can be 4 mm. Increasing the pitch increases the pipe's rigidity, providing greater support and making it suitable for relatively straight channels. A maximum pitch of 4 mm still ensures good bending performance. Therefore, a range from 2 mm to 4 mm is recommended.

[0075] Regarding the length range of the second cannula segment 2022, a minimum length of 150 cm is recommended. The second cannula segment 2022 is typically the main part of the support tube 202, responsible for covering longer passages. A minimum length of 150 cm meets the requirements of most standard medical device applications, accommodating longer passages such as the gastrointestinal tract. The maximum length can be 300 cm. For medical procedures requiring coverage of even longer passages, the second cannula segment 2022 can be extended to 300 cm to ensure coverage of complex passages or extension to more distant sites within the body. The recommended range for the second cannula segment 2022 is from 150 cm to 300 cm.

[0076] Regarding the pitch range of the second thread, a minimum pitch of 3 mm is recommended. The pitch of the second pipe section 2022 should be slightly larger than that of the first pipe section 2021 to provide more support. A minimum pitch of 3 mm is suitable for most channels. The maximum pitch can be 6 mm; for areas requiring enhanced support, the pitch can be increased. A maximum pitch of 6 mm can provide strong support while maintaining a certain degree of flexibility. Therefore, a range from 3 mm to 6 mm is recommended.

[0077] The minimum thread width for the first and second threads can be 0.01 mm. A smaller thread width helps reduce friction and ensures smooth movement of the support tube 202 within the channel. The maximum thread width can be 0.05 mm; a larger thread width enhances thread strength and support, but may also slightly increase friction. A thread width of 0.05 mm provides support while still ensuring sufficient flexibility. Therefore, the recommended range for the thread width of the first and second threads is 0.01 mm to 0.05 mm.

[0078] Regarding the length range of the third pipe segment 2023, a minimum length of 5 cm is recommended. The third pipe segment 2023 is typically located at the end of the support pipe 202, and its function is to provide final support or stability. A minimum length of 5 cm can effectively support the final section of pipe. The maximum length can be 15 cm; if enhanced stability is required or to accommodate a longer outlet channel, the length of the third pipe segment 2023 can be extended to 15 cm. Therefore, a range from 5 cm to 15 cm is recommended.

[0079] The above numerical range provides sufficient flexibility to adjust the length and thread design of the support tube 202 according to actual needs, in order to adapt to different anatomical structures and surgical requirements. Based on the above publicly available data, those skilled in the art can also use other numerical ranges according to actual needs, without exceeding the inventive concept of the invention.

[0080] refer to Figure 2 As shown, the drive rope 204 extends into the movable handle 400, and the proximal end of the drive rope 204 is fixedly connected to the movable handle 400. The power plug 30 is pressed onto the drive rope 204 through the cavity 404.

[0081] refer to Figure 5 As shown, when powered on, the external power supply provides a positive and a negative power terminal. The positive terminal is connected to the power plug 30 on the medical device and is called the surgical electrode or effective electrode. The negative terminal is connected to a metal plate (or negative plate), which is attached to the patient during surgery and is generally called the loop electrode. When the power plug 30 is connected to the positive power terminal via the positive line, the current flows sequentially along the power plug 30 to the drive rope 204 and the clamp assembly 10. When the clamp assembly 10 is working, it clamps the human mucosal tissue. The mucosal tissue acts as the current transmission medium, and the current flows to the negative plate. The negative plate is connected to the negative power terminal through the negative circuit, thus forming a complete current loop. This allows for direct electrocoagulation or thermal sampling of the tissue sample clamped by the clamp assembly 10. Thus, the medical device provided by this utility model integrates cold sampling biopsy and thermocoagulation functions, eliminating the need for doctors to frequently change different diagnostic and treatment instruments during surgery, improving electrocoagulation efficiency, simplifying the surgical procedure, shortening the operation time by 0.5-3 hours, and reducing patient pain and risks.

[0082] For example, in a traditional surgery, after taking a sample with cold sampling forceps, the forceps are removed and a powered instrument is reinserted for electrocoagulation hemostasis. This insertion process is difficult because it involves navigating the winding pathways of the body, and repeated insertions can cause organ edema. After insertion, the surgeon must reposition the instrument to align with the lesion. This repeated switching of instruments, insertion, and repositioning increases the surgery time by 0.5-3 hours. However, using the medical device provided by this invention, which integrates cold sampling biopsy and thermocoagulation functions, eliminates the need for frequent changes of different instruments during surgery, reducing the surgery time by 0.5-3 hours and alleviating patient suffering and risks.

[0083] refer to Figure 6 As shown, the pliers assembly 10 includes a first pliers head 110, a second pliers head 111, a pliers head holder 100, and a first retaining pin 112. The tail of the first pliers head 110 has a first arcuate groove 113 that matches the first retaining pin 112, and the tail of the second pliers head 111 has a second arcuate groove 114 that matches the first retaining pin 112. The pliers head holder 100 has a pivot hole 1001, the first pliers head 110 has a first connecting hole 1101, and the second pliers head 111 has a second connecting hole 1110. The distal end of the drive rope 204 has a first through hole 2041. The first retaining pin 112 passes sequentially (along the reader's line of sight) through the pivot hole 1001, the first connecting hole 1101, the second connecting hole 1110, and the first through hole 2041, thereby allowing the first pliers head 110 and the second pliers head 111 to be slidably hinged to the pliers head holder 100 and the drive rope 204 around the axis of the first retaining pin 112. The first clamp head 110 is provided with a plurality of first biting teeth 1102, which are arranged sequentially on both sides of the outer periphery of the receiving groove of the first clamp head 110. The second clamp head 111 is provided with a plurality of second biting teeth 1112, which are arranged sequentially on both sides of the outer periphery of the receiving groove of the second clamp head 111. When the clamp head assembly 10 is in the closed state, the first biting teeth 1102 on the first clamp head 110 and the second biting teeth 1112 on the second clamp head 111 can fully engage, thereby enabling the clamped sample tissue to be cut.

[0084] By sliding the movable handle 400 left and right, the movable handle 400 drives the drive rope 204 to move left and right, thereby driving the first jaw 110 and the second jaw 111 in the jaw assembly 10 to open and close. (Reference) Figure 7 As shown, when the movable handle 400 slides to the middle-rear position on the fixed handle 403, the pliers assembly 10 is in the closed state. When the movable handle 400 slides to the left to the forward position on the fixed handle 403, the pliers assembly 10 is in the open state.

[0085] The method of using the medical device provided in this embodiment is as follows: During the operation, the forceps assembly 10 and the support assembly 20 are inserted sequentially along the natural cavity of the human body, and the distal end of the forceps assembly 10 reaches the surgical site. Then, the first movable handle 401 and the second movable handle 402 are slid to the right (towards the fixed handle 403) to close the forceps assembly 10 and clamp the tissue sample at the surgical site. After successful sampling, the power plug 30 is powered on, and the current flows sequentially through the power plug 30 to the drive rope 204 and the forceps assembly 10, thereby enabling electrocoagulation or thermal sampling of the sampled tissue clamped by the forceps assembly 10. The medical device provided by this invention has the function of an electrocoagulator. During the entire operation, the doctor does not need to frequently switch between biopsy forceps and electrocoagulators, which reduces the patient's pain and risk. Meanwhile, the support tube 202 with unequal pitch gives the entire support tube assembly 20 good bending resistance and support, allowing it to pass through complex channels in the human body, especially the gallbladder and pancreas, without resistance, thereby greatly improving the efficiency of surgery.

[0086] refer to Figure 8As shown in the illustration, this utility model embodiment also provides another pliers head assembly 10. The pliers head assembly 10 is mounted on the pliers head frame 100. Specifically, the pliers head assembly 10 includes a third pliers head 120, a fourth pliers head 121, a second fixing pin 122, a third fixing pin 123, a fourth fixing pin 124, a first connecting rod 125, and a second connecting rod 126. The pliers head frame 100 is provided with a pivot pin hole 1001, the third pliers head 120 is provided with a third connecting hole 1201, the fourth pliers head 121 is provided with a fourth connecting hole 1211, and the distal end of the drive rope 204 is provided with a first through hole 2041. The second fixing pin 122 passes through the pivot pin hole 1001, the fourth connecting hole 1211, the third connecting hole 1201, and the first through hole 2041 sequentially from top to bottom, thereby allowing the third pliers head 120 and the fourth pliers head 121 to be slidably hinged to the pliers head frame 100 and the drive rope 204 around the axis of the second fixing pin 122. One end of the first connecting rod 125 is hinged to the tail of the third jaw 120 via a third fixing pin 123. One end of the second connecting rod 126 is hinged to the tail of the fourth jaw 121 via a fourth fixing pin 124. The other ends of the first connecting rod 125 and the second connecting rod 126 are hinged to the drive rope 204. The third jaw 120 is provided with multiple third biting teeth 1202, which are arranged sequentially on both sides of the outer periphery of the receiving groove of the third jaw 120. The fourth jaw 121 is provided with multiple fourth biting teeth 1212, which are arranged sequentially on both sides of the outer periphery of the receiving groove of the fourth jaw 121. When the jaw assembly 10 is in the closed state, the third biting teeth 1202 on the third jaw 120 and the fourth biting teeth 1212 on the fourth jaw 121 can fully engage. By sliding the movable handle 400 left and right, the movable handle 400 drives the drive rope 204 to move left and right, thereby driving the third jaw 121 and the fourth jaw 120 in the jaw assembly 10 to open and close.

[0087] refer to Figure 9As shown in the illustration, this utility model also provides another type of pliers assembly 10. The pliers assembly 10 includes a fifth pliers head 130, a sixth pliers head 131, a first metal wire 133, a second metal wire 134, and a fifth fixing pin 132. The pliers frame 100 is provided with a pivot pin hole 1001, the fifth pliers head 130 is provided with a fifth connecting hole 1201, the sixth pliers head 131 is provided with a sixth connecting hole 1211, and the distal end of the drive rope 204 is provided with a first through hole 2041. The fifth fixing pin 132 passes through the pivot pin hole 1001, the sixth connecting hole 1211, the fifth connecting hole 1201, and the first through hole 2041 sequentially from top to bottom, thereby allowing the fifth pliers head 130 and the sixth pliers head 131 to be slidably hinged to the pliers frame 100 and the drive rope 204 around the axis of the fifth fixing pin 135. The fifth jaw 130 and the sixth jaw 131 are respectively provided with a second through hole 1303 and a third through hole 1313 at their tails. One end of the first metal wire 133 is bent, and one end of the second metal wire 134 is bent. The bent end of the first metal wire 133 is inserted and connected to the second through hole 1303 at the tail of the fifth jaw 130, and the bent end of the second metal wire 134 is inserted and connected to the third through hole 1313 at the tail of the sixth jaw 131. The other ends of the first metal wire 133 and the other ends of the second metal wire 134 are fixedly connected to one end of the drive rope 204. The fifth jaw 130 is provided with multiple fifth biting teeth 1302, which are arranged sequentially on both sides of the outer periphery of the receiving groove of the fifth jaw 130. The sixth jaw 131 is provided with multiple sixth biting teeth 1312, which are arranged sequentially on both sides of the outer periphery of the receiving groove of the sixth jaw 131. When the jaw assembly 10 is in the closed state, the fifth biting tooth 1302 on the fifth jaw 130 and the sixth biting tooth 1312 on the sixth jaw 131 can fully engage. By sliding the movable handle 400 left and right, the movable handle 400 drives the drive rope 204 to move left and right, thereby driving the fifth jaw 131 and the sixth jaw 130 in the jaw assembly 10 to perform opening and closing actions.

[0088] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A medical device, characterized in that, It includes a pliers head assembly, a support tube assembly, a power plug, and a handle assembly; one end of the pliers head assembly is connected to the distal end of the support tube assembly, and the proximal end of the support tube assembly is connected to the handle assembly; The handle assembly includes a first movable handle, a second movable handle, and a fixed handle. The first movable handle and the second movable handle are slidably connected to the fixed handle, and the first movable handle and the second movable handle can slide left and right relative to the fixed handle. The first movable handle has a cavity, and one end of the power plug is located inside the cavity; The support tube assembly is composed of a drive rope, a smooth layer, a support tube, and an insulating tube, from the inside out. The smooth layer is disposed on the outside of the drive rope to reduce the frictional resistance generated when the drive rope slides on the inner wall of the smooth layer. The drive rope is used to control the opening and closing action of the pliers assembly, and the outer wall of the support tube is provided with multiple threads of unequal pitch. The power plug is electrically connected to the pliers assembly via the drive cord.

2. The medical device according to claim 1, characterized in that, The outer wall of the insulating tube is smooth.

3. The medical device according to claim 1, characterized in that, The diameters of the clamp assembly and the support tube assembly are less than 1 mm.

4. The medical device according to claim 1, characterized in that, The outer wall of the support tube is provided with a first tube section, a second tube section and a third tube section in sequence from the distal end to the proximal end; The outer side of the first pipe section is provided with multiple first threads of the first pitch; The outer side of the second pipe section is provided with multiple second threads of a second pitch, wherein the first pitch is smaller than the second pitch; The outer side of the third pipe section is unthreaded.

5. The medical device according to claim 4, characterized in that, The total length of the support tube ranges from 0.1 meters to 4 meters; The length of the first pipe segment ranges from 10 cm to 50 cm, and the pitch of the first thread ranges from 2 mm to 4 mm. The second pipe section ranges from 150 cm to 300 cm, and the second pitch ranges from 3 mm to 6 mm; The minimum thread width of the first and second threads is from 0.01 mm to 0.05 mm; The length of the third pipe section ranges from 5 centimeters to 15 centimeters.

6. The medical device according to claim 4, characterized in that, The length of the first pipe section is 40 centimeters, and the first pitch is 3 millimeters; The outer side of the second pipe section is provided with multiple second threads of the second pitch. The length of the second pipe section is 241 cm, and the second thread pitch is 5 mm. The widths of the first thread and the second thread are both 0.02 mm. The outer side of the third pipe section is unthreaded.

7. The medical device according to claim 4, characterized in that, The bending degree of the first pipe section is greater than 0° and less than or equal to 180° U-shape.

8. The medical device according to claim 1, characterized in that, The pliers assembly includes a first pliers head, a second pliers head, a pliers head holder, and a first retaining pin; The tail of the first pliers head is provided with a first arc-shaped groove that matches the first fixing pin, and the tail of the second pliers head is provided with a second arc-shaped groove that matches the first fixing pin. The first pliers head is provided with a first connecting hole, and the second pliers head is provided with a second connecting hole. The pliers head frame is provided with a pivot pin hole. The first fixing pin passes through the pivot pin hole, the first connecting hole, the second connecting hole, and the first through hole in sequence, so that the first pliers head and the second pliers head are slidably hinged to the pliers head frame and the drive rope around the axis of the first fixing pin.

9. The medical device according to claim 1, characterized in that, The pliers assembly includes a third pliers head, a fourth pliers head, a second fixing pin, a third fixing pin, a fourth fixing pin, a first connecting rod, a second connecting rod, and a pliers head frame. The pliers head frame has a pivot pin hole, the third pliers head has a third connecting hole, the fourth pliers head has a fourth connecting hole, and the distal end of the drive rope has a first through hole. The second fixing pin passes through the pivot pin hole, the fourth connecting hole, the third connecting hole, and the first through hole from top to bottom, so that the third pliers head and the fourth pliers head are slidably hinged to the pliers head frame and the drive rope around the axis of the second fixing pin.

10. The medical device according to claim 1, characterized in that, The pliers assembly includes a fifth pliers head, a sixth pliers head, a first metal wire, a second metal wire, a fifth fixing pin, and a pliers head frame. The pliers head frame has a pivot pin hole, the fifth pliers head has a fifth connecting hole, the sixth pliers head has a sixth connecting hole, and the distal end of the drive rope has a first through hole. The fifth fixing pin passes through the pivot pin hole, the sixth connecting hole, the fifth connecting hole, and the first through hole sequentially from top to bottom, thereby allowing the fifth pliers head and the sixth pliers head to be slidably hinged around the axis of the fifth fixing pin, and the drive rope is hinged to the pliers head frame. The fifth and sixth jaws are respectively provided with a second through hole and a third through hole at their tails. One end of the first metal wire is bent, and one end of the second metal wire is bent. The bent end of the first metal wire is inserted and connected to the second through hole at the tail of the fifth jaw, and the bent end of the second metal wire is inserted and connected to the third through hole at the tail of the sixth jaw. The other ends of the first and second metal wires are fixedly connected to one end of the drive rope.

11. The medical device according to claim 8, characterized in that, The first pliers head is provided with a plurality of first biting teeth, which are arranged sequentially on both sides of the outer periphery of the receiving groove of the first pliers head. The second pliers head is provided with a plurality of second biting teeth, which are arranged sequentially on both sides of the outer periphery of the receiving groove of the second pliers head. When the pliers head assembly is in the closed state, the first biting teeth and the second biting teeth on the second pliers head can fully engage.

12. The medical device according to claim 1, characterized in that, The insulating tube is a heat-shrink tubing and wraps around the supporting tube.

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