Instrument guiding device under endoscope
By using a plastic sheath and an improved connection method between the guidewire and the clamp flap, the high cost and slippage problems of existing endoscopic instrument guidance devices have been solved, resulting in cost reduction and structural simplification.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 八恒医学科技(常州)有限公司
- Filing Date
- 2025-01-08
- Publication Date
- 2026-05-01
AI Technical Summary
Existing endoscopic instrument guiding devices have expensive, easily damaged, and complex sheath materials, and the guidewire connection method for forceps instruments is prone to slippage.
The sheath is made of plastic tubing, and the guidewire and clamp flap are connected through a circular through-hole and a stop, eliminating the linkage structure and simplifying the instrument design.
It reduces the cost of instrument manufacturing, decreases the risk of friction damage, and improves the reliability of connections and ease of operation.
Smart Images
Figure CN224179700U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and to a device for inserting the working end of a surgical instrument into the human body through an endoscopic channel for operation, particularly an endoscopic instrument guiding device. Background Technology
[0002] Endoscopic surgery refers to the procedure of inserting an endoscope through a normal or artificial passage into the body to or near the lesion, and then, under direct endoscopic visualization or with the assistance of X-ray fluoroscopy or ultrasound, observing, stopping bleeding, removing, removing stones, draining, or reconstructing the passage for the local lesion.
[0003] Endoscopic surgical instruments include various types of biopsy forceps, hemostatic clips, injection needles, polyp snares, grasping forceps, foreign body forceps, and multiple varicose vein ligators. All surgical instruments are inserted into the human body through the endoscopic channel to perform surgical operations. The endoscopic channel is a long and narrow channel, and the corresponding guiding device is a slender device.
[0004] A guiding device typically includes a slender sheath and a guidewire placed inside the sheath. One end of the guidewire is connected to the working end of the instrument, so that the working end can be operated in conjunction with the force applied to the guidewire.
[0005] Existing guidance devices have defects: their sheaths are generally of two types, one such as... Figure 1 As shown, this is an exposed metal spring tube. When this type of sheath passes through the endoscope channel, it can cause frictional damage to the inner wall of the clamp channel. If the metal wire has burrs, it can even cause irreversible scratches to the clamp channel. Furthermore, spring tubes have drawbacks such as high manufacturing costs and complex assembly processes. Another type... Figure 2 The image shows a plastic-coated spring tube, which is a metal spring tube coated with a layer of PE plastic. This type of sheath increases manufacturing costs, and the plastic coating is at risk of damage, which can affect product use.
[0006] Furthermore, existing guiding devices also have drawbacks when applied to forceps-like instruments: such as... Figure 3 The diagram shows the structure of the working end of a traditional forceps instrument. The guidewire is a single wire connected to a connecting rod that is hinged to each other and to the sheath. The forceps are all hinged to the sheath and to the connecting rods. When force is applied to the guidewire to cause linear displacement relative to the sheath, the forceps can be opened or closed through the linkage of the connecting rods. However, this structure has many parts, is complex to assemble, and is expensive, making it unsuitable for disposable endoscopic instruments.
[0007] To address this technical shortcoming, new solutions have emerged, such as... Figure 4 As shown, in this scheme, the guide wire is a double wire, the connecting rod is discarded, and the two guide wires are connected to the two clamping flaps respectively, which can still realize the function of controlling the opening and closing of the clamping flaps through the guide wires;
[0008] However, this solution has a new drawback: in this solution, the guidewire is connected to the clamp flap by bending the end of the guidewire into a Z-shape and passing through the through hole formed at the end of the clamp flap, which poses a risk that the guidewire will slip off the clamp head. Utility Model Content
[0009] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide an endoscopic instrument guiding device.
[0010] According to the endoscopic instrument guiding device proposed in this utility model, it is used to guide the working end of the instrument into the human body through the endoscope channel for operation. It includes a sheath and a guide wire placed in the sheath. One end of the guide wire extends to the outside of the sheath and the other end is connected to the working end. Thus, under the action of external force, the guide wire can be displaced along the extension direction of the sheath, thereby driving the working end to operate. The sheath is composed of a plastic tube.
[0011] The purpose of this design is to use a plastic tube instead of a spring tube or a plastic-coated spring tube, and to make the thickness of the plastic tube greater than that of the plastic coating layer. This ensures the performance of the sheath while significantly reducing the manufacturing cost of the sheath and the cost of the materials themselves. This is because plastic is cheaper than metal, and it only needs to be extruded, without the need for winding or plastic coating. Even the assembly with other parts does not require the use of expensive laser welding machines, but only ordinary welding or assembly. As a result, the cost of related endoscopic instruments can be significantly reduced.
[0012] In some examples of this utility model, the working end is a clamping body with a clamping function. The clamping body includes clamping flaps that are hinged to each other and hinged to the sheath tube. The guide wire is connected to one end of the clamping flaps near the sheath tube.
[0013] The purpose of this design is to connect the guidewire and the clamp flap, allowing the guidewire to directly act on the clamp flap, thus simplifying the instrument structure and reducing manufacturing costs.
[0014] In some examples of this invention, the number of guidewires is two or more, with one guidewire connected to each clamp flap.
[0015] The purpose of this design is to use a single guidewire to control the clamp flaps individually, which reduces the number of related parts and simplifies the instrument structure.
[0016] In some examples of this utility model, each clamping jaw is provided with a through hole at the connection point with the guide wire, through which both sides of the clamping jaw are passed. The guide wire extends into the through hole from one side and extends to the other side of the through hole, and is connected and stopped on that side to prevent the guide wire from coming out of the through hole.
[0017] The purpose of this design is to replace the traditional Z-shaped structure with a stop and guide wire connection, which provides a reliable and non-slip connection.
[0018] In some examples of this utility model, the through hole is a circular through hole, and the stop is a circular baffle, the diameter of which is larger than the inner diameter of the circular through hole.
[0019] The purpose of this design is to further prevent the guide wire from slipping off the through hole.
[0020] In some examples of this utility model, the instrument guiding device also includes a clamp body seat, with the clamp flaps hinged to the clamp body seat, and the clamp body seat fixedly connected to the sheath.
[0021] The purpose of this design is that the clamp body at the end of the sheath will interfere with the sheath, so the end of the sheath needs to provide a certain support force. Therefore, a clamp body seat is provided. The clamp body seat is generally made of metal and is tightly fitted to the end of the sheath.
[0022] In some examples of this utility model, the end of the guidewire extending outside the sheath is connected to the handle, the end of the sheath near the handle is connected to the handle sleeve, and the handle passes through the handle sleeve.
[0023] The purpose of this design is to make it easier to hold and control.
[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of a sheath made from a metal spring tube in the background art of this utility model;
[0027] Figure 2 This is a schematic diagram of a sheath tube made from a plastic-coated spring tube in the background art of this utility model;
[0028] Figure 3 This is a schematic diagram of the working end of a traditional forceps-like instrument in the background art of this utility model;
[0029] Figure 4 This is a schematic diagram of the working end of another traditional forceps-type instrument in the background art of this utility model;
[0030] Figure 5 This is a front view of the instrument guidance device in an embodiment of this utility model;
[0031] Figure 6 This is a schematic diagram of the sheath structure in an embodiment of the present invention;
[0032] Figure 7 This is a schematic diagram of the sheath structure in other embodiments of this utility model;
[0033] Figure 8 This is a detailed view of the functional end in an embodiment of this utility model.
[0034] Explanation of reference numerals in the attached figures:
[0035] Sheath 1;
[0036] Guide wire 2;
[0037] Clamp body 3, clamp disc 31, through hole 311;
[0038] Block 4;
[0039] Clamp body base 5, flared opening 51, through groove 52;
[0040] 6.
[0041] Handle 7;
[0042] Handle cover 8. Detailed Implementation
[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0044] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0046] The embodiments of this utility model are described in detail below. Examples of these 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 are only used to explain this utility model, and should not be construed as limiting this utility model.
[0047] The following is for reference. Figures 5-8 The illustration depicts an endoscopic instrument guide device according to an embodiment of the present invention.
[0048] This endoscopic instrument guiding device is used to guide the working end of an instrument into the human body through the endoscope channel for operation. This embodiment uses forceps instruments as an example.
[0049] For details, please see the appendix. Figure 5 This is a front view of the instrument guidance device, which includes a sheath 1 and a guide wire 2 (shown by dashed lines) placed inside the sheath 1. One end of the guide wire 2 extends outside the sheath 1 to facilitate the application of external force to the guide wire 2, and the other end is connected to the working end. Thus, under the action of external force, the guide wire 2 can be displaced along the extension direction of the sheath 1, thereby driving the working end to work. The sheath 1 is composed of a plastic tube.
[0050] Please see the appendix Figure 6The diagram shows the structure of the sheath 1. The sheath 1 is made of only one layer of plastic, forming a long and narrow channel through which the guide wire 2 passes. In order to ensure the performance of the sheath 1 and enable it to be guided smoothly under the endoscope channel, the wall of the sheath 1 has a certain thickness, which is at least the thickness of the spring tube and thicker than the plastic coating layer.
[0051] Please see the appendix Figure 7 In another embodiment, the sheath 1 is also made of plastic, forming two parallel channels;
[0052] In other embodiments, the sheath 1 may also form multiple channels.
[0053] Please see the appendix Figure 8 The diagram shows a detail of the action end, which is a clamping body 3. The clamping body 3 includes two clamping flaps 31 that are hinged together in the middle. The middle of the clamping flaps 31 is also hinged to the sheath tube 1. The guide wire 2 is connected to the end of the clamping flap 31 that is close to the sheath tube 1. When force is applied to the end of the guide wire 2 that is away from the clamping body 3, causing it to undergo linear displacement relative to the sheath tube 1, it can drive the clamping flaps 31 to close or open with each other.
[0054] Please continue reading the appendix. Figure 8 There are two guidewires 2, both placed in the channel of the sheath 1. Each clamp flap 31 is connected to a guidewire 2, thus eliminating the need for connecting rods and other structures, making the instrument structure simpler.
[0055] In other embodiments, the two guidewires 2 correspond as follows: Figure 7 The dual-channel sheath 1 shown has two guidewires 2 placed in different channels.
[0056] Please continue reading the appendix. Figure 8 Each clamping disc 31 has a through hole 311 at the connection point with the guide wire 2, through which both sides of the clamping disc 31 pass. The guide wire 2 extends into the through hole 311 from one side and extends to the other side of the through hole 311, where a stop 4 is connected to prevent the guide wire 2 from disengaging from the through hole 311.
[0057] Please continue reading the appendix. Figure 8 The through hole 311 is a circular through hole 311, and the stop 4 is a circular stop plate. The diameter D of the circular stop plate is larger than the inner diameter d of the circular through hole 311, and the circular stop plate is set on the side of the two clamping plates 31 that are opposite to each other, and is welded to the guide wire 2 respectively.
[0058] Please continue reading the appendix. Figure 8 The instrument guiding device also includes a clamp body seat 5, with clamp discs 31 hinged to the clamp body seat 5, and the clamp body seat 5 fixedly connected to the sheath tube 1.
[0059] Specifically, the pin 6 passes through the clamp body seat 5 and the two clamp flaps 31 in sequence, so that the three are hinged together.
[0060] Specifically, the clamp body 5 is basically a cylindrical structure, with a flared end 51 at the end near the sheath 1, which is fitted onto the sheath 1, and a through groove 52 is formed on its side, so that the guide wire 2 can pass through the through groove 52 and be hinged to the clamp disc 31.
[0061] Please continue reading the appendix. Figure 5 The end of the guidewire 2 extending outside the sheath 1 is connected to the handle 7. The end of the sheath 1 near the handle 7 is connected to the handle sleeve 8. The handle 7 passes through the handle sleeve 8. During operation, one hand holds the handle sleeve 8 and the other hand applies force to the handle 7.
[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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.
[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. An endoscope device guide for guiding a working end of an instrument through an endoscope channel to perform work in a human body, characterized by, The instrument guiding device includes a sheath and a guide wire placed inside the sheath. One end of the guide wire extends outside the sheath, and the other end is connected to the working end. Thus, under the action of external force, the guide wire can be displaced along the extension direction of the sheath, thereby driving the working end to work. The sheath is made of plastic tubing.
2. The endoscopic instrument guide device of claim 1, wherein, The working end is a clamping body with a clamping function. The clamping body includes clamping flaps that are hinged to each other and hinged to the sheath. The guide wire is connected to one end of the clamping flaps near the sheath.
3. The endoscopic instrument guide device of claim 2, wherein, The number of guidewires is two or more, and each clamp flap is connected to one guidewire.
4. The endoscopic instrument guiding device according to claim 3, characterized in that, Each clamping flap has a through hole at the connection point with the guide wire, through which both sides of the clamping flap pass. The guide wire extends into the through hole from one side and extends to the other side of the through hole, where it is connected and stopped to prevent the guide wire from detaching from the through hole.
5. The endoscopic instrument guide device of claim 4, wherein, The through hole is a circular through hole, and the stop is a circular baffle, the diameter of which is larger than the inner diameter of the circular through hole.
6. The endoscope instrument guide device according to any one of claims 2 to 5, characterized by It also includes a clamp body seat, the clamp flaps are hinged to the clamp body seat, and the clamp body seat is fixedly connected to the sheath.
7. The endoscopic instrument guiding device according to any one of claims 1 to 5, characterized in that, One end of the guidewire extending outside the sheath is connected to a handle, and the end of the sheath near the handle is connected to a handle sleeve, with the handle passing through the handle sleeve.