Outer sleeve structure of biliary tract endoscope

Abstract

The invention relates to the technical field of medical instruments, in particular to a sleeve structure of a biliary tract endoscope. Comprising at least one closed external pipeline, and the external pipeline is fixed to the outer surface of the inner diameter pipe body through a fixing structure in the length direction of the endoscope pipe body. The external pipeline is provided with ports communicated with the outer space of an instrument channel at the two ends of the instrument channel, penetrating through the enteroscope, of the biliary tract endoscope respectively, a hard sleeve head fixed to an endoscope pipe body is arranged on the port, close to the end of the biliary tract endoscope, of an endoscope lens, and the hard sleeve head is provided with a channel opening communicated with the external pipeline; the end face, provided with the channel opening, of the hard sleeve head is provided with a blocking head which surrounds the endoscope lens and protrudes outwards, the blocking head is provided with a sliding way which is communicated with the channel opening and extends towards the endoscope lens, and the front portion, facing the advancing direction of the endoscope tube body, of the blocking head is further provided with an arc-shaped head which shields the sliding way and provides guiding. The endoscope tube fixing device is simple in structure, and the endoscope tube body can be fixed, adsorbed and supported through the arranged hard sleeve head structure.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a biliary endoscope jacket structure. Background Art

[0002] A choledochoscope is a medical optical endoscope designed for endoscopic examination and endoscopic surgery of the pancreatic and bile ducts. It is usually used as a smaller-sized operable hose device, which is inserted from the instrument channel of the enteroscope and enters the bile duct at the junction of the bile duct and the intestine for operation. A choledochoscope usually consists of an objective lens system, an optical image transmission system, and an eyepiece system. It enters the human body through a natural orifice for imaging and diagnosis. A fiber choledochoscope is mainly composed of a fiber choledochoscope body and a cold light source. The body is connected to the light source with the help of a connector to form a fully functional fiber choledochoscope inspection and treatment system. In order to meet the needs of various inspections and treatments, it is usually equipped with a variety of accessories, mainly stone removal nets, biopsy forceps, cell brushes, flushing catheters, cameras, television video observation systems, etc. The fiber choledochoscope body consists of two parts, hard and soft. The hard part includes an eyepiece and a direction control button, where the eyepiece can freely adjust the focal length, and the control button below the eyepiece can adjust the angle and direction of the flexible part at the front end of the soft part. The soft part is mainly the light guiding system, which consists of 2 light source beam holes, 1 objective lens, 1-2 tubular channels, wrapped with synthetic resin rubber, and the front end is a bendable part.

[0003] Existing choledochoscopes are also equipped with a separate channel for the passage of clamps, hemostats or other operating instruments. However, since most existing choledochoscopes have only one channel, if the bile duct needs to be cleaned, for example, when there are flocs or other objects, the instruments that pass through the existing single channel cannot completely solve the problem, and multiple instruments need to be passed back and forth to handle it. Such back and forth penetration of different instruments not only requires disinfection before and after, but also cannot guarantee the corresponding effective suction when there are liquids and flocs if negative pressure adsorption is to be achieved. At this time, it is necessary to cooperate with the clamp to stretch and position, but a single channel cannot achieve this. There are new choledochoscopes designed for this demand in the prior art, but for many medical institutions, the number of choledochoscopes originally purchased is large, and how to solve this problem in a low-cost way is the key.

[0004] At the same time, in other endoscopic technologies, there is a sleeve structure installed on the outside of the endoscope to provide an additional channel for use, but this sleeve structure generally adopts a thin-wall setting. Since the channel itself needs to be soft and easy to bend, the material itself does not have the function of providing an adsorption channel. In particular, when it is necessary to connect an external air compressor to adsorb part of the tissue fluid at the endoscope lens, the port of the material itself will deform and the extrusion port cannot achieve a good adsorption effect. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a biliary endoscope jacket structure, which is nested on the outside of the biliary endoscope by means of a jacket setting, maintains a stable connection with the biliary endoscope and is brought into the body by the biliary endoscope to form an independent channel, and through a segmented structure design, a hard sleeve is provided at the end to meet the end anchoring positioning and maintain the stability of the adsorption channel.

[0006] The technical solution adopted by the present invention is: In a first aspect, the present invention provides a biliary endoscope jacket structure, which is arranged outside the endoscope tube body of the biliary endoscope, and includes at least one closed external pipeline, and the external pipeline is fixed to the outer surface of the endoscope tube body along the length direction of the endoscope tube body by a fixing structure; The external pipeline has ports connected to the space outside the instrument channel at both ends of the instrument channel through which the biliary endoscope passes through the colonoscope, and a hard sleeve fixed on the endoscope tube body is provided on the port near the end of the biliary endoscope at the endoscope lens, and the hard sleeve has a channel opening connected to the external pipeline; The hard sleeve has a stopper on the end face with the channel opening, which surrounds the endoscope lens and protrudes outward. The stopper has a slideway connected to the channel opening and extending toward the endoscope lens. The stopper also has an arc-shaped head at the front facing the direction of advancement of the endoscope tube body, which covers the slideway and provides guidance.

[0007] It should be noted that the biliary endoscope is an instrument that is inserted through the instrument channel of the colonoscope to the corresponding common bile duct and pancreatic duct at the nipple openings in the intestine for operation. Its size is significantly smaller than that of the colonoscope. When in use, the duodenoscope is first passed through the patient's mouth into the digestive tract, and finally reaches the nipple openings of the common bile duct and pancreatic duct in the intestine, adjusts the direction and stops, and then inserts from the instrument channel opening of the operating end of the external duodenoscope, and leaves an operating end of the biliary endoscope on the outside to operate the biliary endoscope.

[0008] The external pipeline in the present invention is an independent pipeline structure fixed on the endoscope tube body by a fixed structure and enters the instrument channel along the endoscope tube body, and the hard sleeve is a structure used to connect the external pipeline and form a fixed end. When the external pipeline is used as a negative pressure adsorption pipeline, it can ensure that the structural strength of the pipeline mouth is sufficient to meet the adsorption requirements. At the same time, when it moves with the endoscope tube body, it can not be displaced or deformed when colliding with objects, especially when passing through narrow areas, it can maintain a good fixing effect and passing effect, avoiding the situation where the endoscope lens passes through but the external pipeline does not pass through.

[0009] In combination with the first aspect, the present invention provides a first implementation of the first aspect, wherein the fixing structure is a plurality of rings arranged at equal intervals along the length direction of the endoscope tube body, and the rings bind the external pipe to the inner wall surface of the endoscope tube body.

[0010] In combination with the first aspect, the present invention provides a second implementation of the first aspect, wherein the circumferential wrap angle of the external pipe around the endoscope tube body is less than 360 degrees.

[0011] It should be noted that the external pipe itself is an independent pipe used as a channel for transporting substances. Since it is set outside the biliary endoscope and needs to be guided into the corresponding position by the biliary endoscope to implement substance transport, its size is generally smaller than the cross-sectional size of the biliary endoscope. In order to ensure that it maintains a good fixation effect with the biliary endoscope and does not get entangled in the instrument channel of the colonoscope, when it is fixed by the fixing structure, its circumferential wrap angle around the endoscope body is limited. The best state is to keep it parallel to the endoscope body at all times.

[0012] In combination with the first aspect, the present invention provides a third embodiment of the first aspect, wherein the fixed structure is an elastic sleeve that is sleeved on the outside of the endoscope tube body and is independent of the external pipe, the thickness of the elastic sleeve is smaller than the cross-sectional radius of the external pipe and the inner wall of the elastic sleeve fits the outer wall of the endoscope tube body and the external pipe.

[0013] In combination with the first aspect, the present invention provides a fourth implementation of the first aspect, wherein the fixed structure is a fixed outer sleeve that is elastic and is mounted on the outside of the endoscope tube body, and the external pipeline is an integrated pipeline structure arranged in the tube wall of the fixed outer sleeve. The external pipeline is fixedly connected to the hard sleeve, and the port of the external sleeve is connected to the channel opening of the hard sleeve.

[0014] In combination with the fourth embodiment of the first aspect, the present invention provides a fifth embodiment of the first aspect, wherein the hard sleeve is an annular structure made of PEEK material and has an axial length of not less than 5 mm, the hard sleeve has a main through hole for the endoscope tube body to pass through, and the inner wall of the main through hole of the hard sleeve is softened by inserting an electric heating wire into the main channel and heated to a temperature of 170°C-260°C, and then sleeved on the surface of the endoscope tube body close to the endoscope lens. After being fixed, the distance between the end face where the channel opening of the hard sleeve is located and the end face of the endoscope lens is less than 4 mm, and the forward extension of the stopper is not less than 7 mm.

[0015] In combination with the fourth embodiment of the first aspect, the present invention provides a sixth embodiment of the first aspect, wherein the hard sleeve is made of 316L stainless steel and has an annular structure with an axial length of not less than 4 mm, the stopper is made of a soft material, the hard sleeve is further provided with a slot, and the stopper has an enlarged end that penetrates into the slot and forms a clamping limit; The hard sleeve has a main through hole for the endoscope tube body to pass through. The hard sleeve is expanded by heating and sleeved on the surface of the endoscope tube body close to the endoscope lens. The distance between the end face where the channel opening of the fixed hard sleeve is located and the end face of the endoscope lens is less than 4mm, and the forward extension of the stopper is not less than 7mm.

[0016] In combination with the sixth embodiment of the first aspect, the present invention provides a seventh embodiment of the first aspect, wherein the main through hole of the hard sleeve is offset along the center of the diameter of the cross section of the hard sleeve, and a thin portion and a thick portion wrapping the endoscope tube body are formed on the cross section of the hard sleeve through the offset of the main through hole, and the external pipe is located at the thick portion; A plurality of deformation and clamping parts are provided on the thin part, and the cross-sectional size of the main through hole is larger than the cross-sectional size of the endoscope tube body. When the hard sleeve is put on the surface of the endoscope tube body, a protrusion pressing inward is formed by squeezing the deformation and clamping part, and the inner diameter of the main through hole is reduced by the deformation and clamping part forming the protrusion inward to limit the endoscope tube body.

[0017] In combination with one of the fifth to seventh embodiments of the first aspect, the present invention provides an eighth embodiment of the first aspect, wherein a nickel-titanium alloy wire braided layer with a wall thickness of 0.5-0.7 mm is embedded in the external pipe of the fixed outer sleeve, and the fixed outer sleeve is connected to the hard sleeve by viscose or hot melt, and the nickel-titanium alloy wire braided layer passes through a connecting end with a length of not less than 2 mm at the connecting port between the external pipe and the hard sleeve, and the connecting end is embedded in the inner wall of the hard sleeve.

[0018] In combination with one of the fifth to seventh embodiments of the first aspect, the present invention provides the ninety-eighth embodiment of the first aspect, wherein the external pipe of the fixed outer sleeve is connected to a separate connecting pipe head at the port connected to the space outside the instrument channel at the outer end of the biliary endoscope passing through the instrument channel of the colonoscope, and the connecting pipe head and the fixed outer sleeve are an integrated structure, and the fixed outer sleeve has a connecting pipe head extending outward from the end surface of one side of the external channel, and the end of the connecting pipe head has a universal connector for connecting an air nozzle and an expansion nozzle.

[0019] The beneficial effects of the present invention are: (1) The present invention designs a jacket structure of a biliary endoscope that can adjust the fixing method according to needs. Through an external pipe that is sleeved on the outside of the biliary endoscope and leaving ports at both ends of the instrument channel, the channel itself is used for additional instruments to pass through, or the external pipe is used for adsorption operation, thereby cooperating with a mechanism such as a clamp extending from the biliary endoscope to adsorb the target object that needs to be cleared in the bile duct, thereby providing an additional channel on the biliary endoscope at a lower cost; (2) The present invention uses a multi-section binding structure to fix the independent external pipeline structure, so that installation is convenient and the cost is low. Only one independent external pipeline needs to be set up, which is intermittently fixed and sleeved on the outside of the biliary endoscope through a binding or a clamping ring structure. Only corresponding connection ports need to be set at both ends, and the circumferential angle of the entire external pipeline relative to the biliary endoscope is ensured to be less than 360 degrees. (3) The polymer sleeve structure formed by extrusion in the present invention forms an integrated external pipeline inside, which has better integrity and higher structural stability, and can also add an extra protective layer to the endobiliary endoscope; (4) The present invention can achieve an anchoring effect by cooperating with the hard sleeve structure provided in the fixed outer sleeve, that is, it can avoid affecting the controlled movable structural activity characteristics of the front end of the biliary endoscope itself, and at the same time, it can meet the requirements of adsorption and other operations for the port of the external pipeline to be subjected to greater force, thereby improving its stability while ensuring the overall cost is low, making it possible to reuse; (5) The stopper provided at the end of the hard sleeve of the present invention can also avoid damage to the inner wall of the intestine through its arc-shaped head when it contacts the inner wall of the intestine. Especially when the size of the channel opening is expanded, the stopper can form a better blockage. At the same time, the slideway changes the opening direction, which is toward the end face of the endoscope lens, so that the clamping claws and other instruments that originally pass through the endoscope tube body can be pulled to the area close to the end face of the endoscope lens after clamping part of the tissue, and then be directly adsorbed by the upper slideway into the external pipeline, thereby avoiding the trouble of having to completely remove the clamping claws and then disinfect and insert them. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an overall plan view of a jacket structure provided on a biliary endoscope in an embodiment of the present invention; Figure 2 is an overall axonometric schematic diagram of a jacket structure arranged on a biliary endoscope in an embodiment of the present invention; Figure 3 The present invention Figure 2 A is a local enlarged schematic diagram; Figure 4 The present invention Figure 2 FIG. 1 is an enlarged schematic diagram of the first solution in the local B; Figure 5 The present invention Figure 2 FIG. 1 is an enlarged schematic diagram of the second solution in the local B; Figure 6 Schematic diagram of the cross section of three external pipelines in the embodiment of the present invention; Figure 7 is an overall axonometric schematic diagram of another jacket structure provided on a biliary endoscope in an embodiment of the present invention; Figure 8 The present invention Figure 7 The enlarged schematic diagram of the part C in the middle; Fig. 9 It is a structural schematic diagram of a hard sleeve head in an embodiment of the present invention.

[0021] In the figure: 1-operating handle, 2-endoscopic tube body, 3-fixed outer sleeve part, 4-endoscopic lens, 5-connecting tube head, 6-hard sleeve head, 7-channel opening, 8-deformation pressing part, 9-stop head. DETAILED DESCRIPTION

[0022] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of this application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] In addition, if the terms "horizontal" or "vertical" appear in the description of this application, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] Embodiment 1: This embodiment discloses a biliary endoscope jacket structure, which is mainly used in an existing biliary endoscope with only one channel, and is nested outside thereof to achieve the effect of fixing and separately providing an additional channel. The biliary endoscope in this embodiment includes three parts, an operating handle 1, an endoscope tube body 2, and an endoscope lens 4, and has a controlled bend near the endoscope lens 4.

[0030] Specifically, it includes a closed external pipe, which is fixed on the surface of the endoscope tube body 2 along the length direction of the endoscope tube body 2 by a fixed structure. Among them, the fixed structure at least ensures that the two ends of the external pipe are fixed on the surface of the endoscope tube body 2, and a hard sleeve 6 is provided at the end of the external pipe close to the insertion end face of the endoscope tube body 2. The hard sleeve 6 itself is outside the controlled bending part to avoid affecting the bending operation of the end of the bile duct endoscope. The hard sleeve 6 has a channel opening 7 connected to the external pipe, and the external pipe falls out at the outer port of the instrument channel of the colonoscope through which the bile duct endoscope passes and forms an independent port, through which the instrument is inserted into the external pipe and passes out from the channel opening 7 of the hard sleeve 6.

[0031] The channel opening 7 provided on the hard sleeve 6 is offset, that is, the center of the cross-section of the channel for the endoscope tube body 2 to pass through is deviated from the cross-section center of the hard sleeve 6, and then the channel opening 7 is "squeezed" to one side. As a result, in the actual implementation process, if the size of the channel opening 7 is to be close to or exceed the channel size of the endoscope tube body 2, the channel opening 7 will inevitably form a larger bulge. If the end face adopts a conventional vertical surface design, its edge will cause mucosal damage when passing through some narrow channels or releasing the inner wall of the digestive tract.

[0032] In order to solve this problem, a stopper 9 is provided at the end of the hard sleeve 6. The stopper 9 is an arc-shaped end structure formed by the local protrusion of the end face where the channel opening 7 of the hard sleeve 6 is located and extending outward. Its forward end face is an arc-shaped head with a smooth surface that can have a large contact surface with the inner wall of the digestive tract when vertically releasing it. At the same time, the stopper 9 is like a "scoop" covering the channel opening 7, and has a slide on its inner side. The opening of the slide faces the axial direction of the endoscope lens 4, that is, an opening is formed on the side of the channel opening 7 of the endoscope lens 4. Compared with the setting method of directly setting a distance from the end face of the endoscope lens 4, this adsorption port structure with inconsistent opening directions can pull the tissue or structure to be adsorbed to the front end of the endoscope lens 4 when the clamp extending from the endoscope lens 4 is pulled, and it can be sucked into the channel opening 7 by the upper slide. Since the existing endoscopic lens 4 has a channel opening on one side for the instrument to pass through and a camera on the other side, within the field of vision presented in the lens image, the clamping claws can be fully seen clamping the tissue and adsorbing it at the corresponding position. The entire process will not be blocked and the adsorption effect is better.

[0033] At the same time, the size of the slide itself is larger than the channel opening 7, and because it is an offset setting, its inclination angle is less than 90 degrees, generally less than 60 degrees. This setting method is compatible with some instruments passing through the external pipeline. This angle can achieve another guiding method, that is, for targets at certain angles on the inner wall of the bile duct, the clamping claw or traction harness coming out of the channel opening 7 of the endoscope tube body 2 generally maintains a straight forward direction. If a travel angle with a certain angle with the end face of the endoscope lens 4 is to be formed, it is necessary to maintain the distance between the endoscope lens 4 and the target object, and then extend the clamping claw and adjust the angle multiple times to achieve the required angle. This situation is often encountered in actual operation because the operating end is outside the body and is a remote operation. It can only be solved by relying on the doctor's operation under the scope each time.

[0034] In this embodiment, the slideway with an angle is provided, so that the instrument itself that passes through the external pipe has an angle relative to the end face of the endoscope lens 4 through the guidance of the slideway. At this time, the endoscope lens 4 can be directly brought close to the target, and then the instrument can be directly inserted and aligned through the slideway. Although the angle is a fixed angle, compared with the straight-line penetration method, the instrument guided by the slideway itself can be adjusted at a wider angle, and it can be easily operated in accordance with the position of the endoscope lens 4.

[0035] Furthermore, the arrangement of the external pipeline is optimized. In some embodiments, the outer sleeve structure includes a plurality of external pipelines that are independent of each other and not directly connected, and the inner diameter thereof is the same as the channel on the endoscope tube body 2, and then the external fixing structure is uniformly fixed to the endoscope tube body 2. The hard sleeve 6 has a channel opening 7 corresponding to the plurality of external pipelines, and a larger channel opening 7 can be provided as required to connect two or more external pipelines. In this embodiment, a plurality of independent external pipelines have a plurality of ports on the outside, so that a plurality of independent channels are formed outside the endoscope tube body 2 to facilitate the setting of different instruments. During the actual operation, a complex treatment process can be completed by multiple people separately. For example, the precise suturing of multiple incisions in the bile duct and the fixation of multiple hemostatic clips.

[0036] Furthermore, the external pipeline is an independent pipeline structure, generally made of polymer soft material, that is, polyurethane or silicone material is extruded to form a tube, and then cut to a corresponding length as needed and installed on the surface of the biliary endoscope through a fixed structure. The fixed structure in this embodiment is a clamping ring, which is also made of polymer material, and the interval length and corresponding number are determined according to the length of the external pipeline.

[0037] As an implementation method, the fixed structure is a medical rubber sleeve structure, the inner diameter of which is larger than the inner diameter of the external pipe but smaller than the sum of the cross-sectional diameters of the external pipe and the endoscope body 2 at room temperature. During installation, the number of rubber sleeves is first determined, and then they are sleeved on the endoscope body 2 according to the corresponding number, and then the external pipe is passed through the sleeved rubber sleeves in sequence along the surface of the endoscope body 2. When the external pipe passes through the rubber sleeve, it is necessary to first stretch the rubber sleeve outward to expand its inner diameter. After the external pipe passes through, the rubber sleeve is released so that it elastically binds the external pipe to the surface of the endoscope body 2. Since the endoscope body 2, the external pipe and the rubber sleeve are all made of polymer materials, their surfaces have good contact friction, which can prevent the external pipe from deflecting relative to the endoscope body 2 after being bound.

[0038] After the entire external pipe is fixed by the rubber ring, the hard sleeve 6 is then fixed. The hard sleeve 6 includes two modes: integral connection with the external pipe and separate connection. In the integral connection mode, the hard sleeve 6 and the external pipe are made of the same material, but are hardened at the end so that they are sleeved on the end of the endoscope tube body 2 and then hardened to form a positioning point. This can not only achieve a better fixing effect, but also can be hardened to a corresponding length as needed, and can be directly cut into tubes, which can be used for a long time or as a disposable material.

[0039] In this embodiment, the stopper 9 is also integrally formed with the hard sleeve 6, but in this solution, the hard sleeve 6 is a fixed structure, and only the external pipe can be cut to achieve a matching effect. The stopper 9 itself can be used as a soft material, that is, it can maintain a certain deformation ability when contacting the inner wall of the digestive tract, improving its buffering ability to avoid damaging the digestive tract mucosa and inner wall.

[0040] For this curing scheme, the materials and curing methods used in its extended scheme are explained. In this curing use scenario, there is no need to set up an external fixed structure, but an external pipe is used to form an integral part with the hard sleeve 6 and the stopper 9. Generally, UV curing silicone is used, that is, modified silicone with UV photoinitiator added is extruded to form a jacket structure. The jacket structure material is relatively soft and can be easily sleeved on the surface of the endoscope tube body 2. At this time, after determining the position of the hard sleeve 6 and the stopper 9, select fixed points, and cure them locally on the jacket structure through UV lamp at equal intervals to form a jacket structure bonded and fixed to the surface of the endoscope tube body 2. At the same time, the hard sleeve 6 and the stopper 9 are irradiated with UV light, and their hardness is increased by controlling the irradiation time. This method is more flexible.

[0041] Alternatively, RTV silicone can be used to cure the product through local rapid heating to achieve the corresponding effect.

[0042] Alternatively, a split structure design may be adopted, that is, the external pipe itself is made of non-curing silicone material and fixed directly to the surface of the endoscope tube body 2 through an external fixing structure, and then a hard sleeve 6 made of curable material is connected to the external pipe and cured, which can also achieve the corresponding effect.

[0043] In the above-mentioned curing method, in order to ensure the smooth flow of the external pipeline, a tube body formed by an inner tube alloy wire braided layer will be arranged before the extruded material, and the nickel-titanium alloy wire braided layer will extend into the hard sleeve 6, thereby ensuring the smooth flow of the external pipeline and the channel opening 7 during the curing and sleeve process.

[0044] Further, as an implementation method, the fixing structure is an integral elastic sleeve structure, but the elastic sleeve structure is kept separate from the external pipe itself. The external pipe in this method is a nickel-titanium alloy wire braided tube with an external protective layer. The external pipe is first attached to the surface of the endoscope tube body 2, and then an elastic sleeve structure with a cross-sectional size not larger than the cross-sectional size of the endoscope tube body 2 is sleeved to cover the external pipe inside, so that the elastic sleeve is sleeved on the surface of the endoscope tube body 2 and the external pipe is wrapped and fixed. This method is convenient to operate, and the elastic sleeve structure can be made of thinner disposable rubber material, and does not need to be completely sleeved, but can be sleeved in sections, as long as it can form a wrapping and fixation of the external pipe, and this method is not limited to the number of external pipes.

[0045] With respect to the above-mentioned elastic sleeve structure, a further preferred implementation manner is that the elastic sleeve is integrally formed with the external pipe, that is, a fixed outer sleeve 3 made of a polymer material, the fixed outer sleeve 3 itself has an opening with a cross-sectional size smaller than the cross-sectional size of the endoscope tube body 2, and can be elastically sleeved on the surface of the endoscope tube body 2, and an internal channel is provided along the length direction of the fixed outer sleeve 3, and the internal channel is the external pipe. This arrangement is simpler, and the fixed outer sleeve 3 can be directly sleeved on the outside of the endoscope tube body 2.

[0046] Reference Figure 6 , the figure shows several ways of setting an external pipe in the fixed outer sleeve 3. Scheme b is a fixed outer sleeve 3 of equal thickness. The external pipe itself is a channel that is relatively independent of the fixed outer sleeve 3, and the middle connecting part is small, so that the thickness of other inner walls of the fixed outer sleeve 3 can be maintained as much as possible. Scheme c is an elliptical external pipe, which requires the thickness of the fixed outer sleeve 3 to be thickened so that the external pipe can be arranged. It can be seen from scheme c that there is an inner layer in the external pipe, which is a nickel-titanium alloy wire layer. Channel d is a setting method of multiple independent external pipes, that is, a number of independent channels are set in the fixed outer sleeve 3, and corresponding multiple channel openings 7 are provided on the hard sleeve 6.

[0047] Further, refer to Figure 1-Figure 4 , the integrated fixed sleeve portion 3 is described.

[0048] A common choledochoscope structure shown in the figure includes a handheld operating unit and an endoscope lens 4, with an endoscope tube body 2 in the middle. In order to facilitate viewing of the structure in the figure, its length and corresponding size ratio are adjusted, and the line length and line cross-sectional size are adjusted, and only the relative position relationship is used for reference.

[0049] Among them, the fixed outer sleeve 3 is made of silicone. In order to facilitate the sleeve installation on the endoscope tube body 2 of a certain length, the size of the channel on the fixed outer sleeve 3 for the endoscope tube body 2 to pass through is usually adjusted to be close to or slightly larger than the outer diameter of the endoscope tube body 2. When the sleeve is installed, it is directly inserted from the port of the tail channel of the fixed outer sleeve 3, because the port of the side channel is an expansion part, which can guide the endoscope lens 4 to penetrate smoothly. When the endoscope lens 4 completely penetrates and emerges about 4mm from the end of the fixed outer sleeve 3, it reaches the predetermined position. At this time, if the fixed outer sleeve 3 is loose, the shrinkage and fixing effect can be achieved locally by heating. The fixed outer sleeve 3 can be made of silicone rubber material with heat shrinkage properties. The external pipeline in the fixed outer sleeve 3 can be provided with the above-mentioned nickel-titanium alloy wire braided sleeve to avoid the influence of heat shrinkage on the external sleeve.

[0050] The fixed outer sleeve 3 with a braided sleeve of nickel-titanium alloy wire is formed by simultaneously embedding nickel-titanium alloy wire to form a braided sleeve structure while precisely controlling the inner and outer diameters through a die during extrusion. The inner diameter of the channel for the endoscope tube body 2 to pass through the fixed outer sleeve 3 in this embodiment is 4.8-5mm, the outer diameter of the fixed outer sleeve 3 is in the range of 7-10mm, and the overall wall thickness average is about 0.7mm. The inner diameter of the external pipe is about 2-4.5mm.

[0051] Reference Figure 3 The external pipeline of the fixed outer sleeve 3 is connected to a separate connecting pipe head 5 at the port connected to the outer space of the instrument channel of the biliary endoscope passing through the colonoscope. The connecting pipe head 5 and the fixed outer sleeve 3 are an integrated structure. The fixed outer sleeve 3 has a connecting pipe head 5 extending outward from one end surface of the external channel. The end of the connecting pipe head 5 has a universal connector for connecting an air nozzle and an expansion nozzle.

[0052] The hard sleeve 6 structure includes two or three settings. One is made of the same material as the fixed outer sleeve 3, and hardened by reinforcement at the end. The reinforcement method includes the above-mentioned material with added light curing agent, and cured by local UV light irradiation. One is thermal curing, which is a heating curing method. The other is to nest a metal ring on the outside. The metal ring is made of titanium alloy and has a small thickness, generally about 0.2mm. It is fixed by wrapping around the end and deforming the other end of the external pipe to buckle inward to squeeze and fix, which can also achieve the effect of hardening.

[0053] As an embodiment, the hard sleeve 6 is a ring structure made of PEEK material and has an axial length of not less than 5 mm. The hard sleeve 6 is connected to the fixed sleeve portion 3 made of silicone material by hot melting, wherein the internal connection state is maintained by a nickel-titanium alloy wire braided sleeve that passes through the hard sleeve 6 and the fixed sleeve portion 3.

[0054] The hard sleeve 6 has a main through hole for the endoscope tube body 2 to pass through. The inner wall of the main through hole of the hard sleeve 6 is softened by inserting an electric heating wire into the main channel and heated to a temperature of 170°C-260°C, and then the hard sleeve 6 is sleeved on the surface of the endoscope tube body 2 close to the endoscope lens 4. After being fixed, the distance between the end face where the channel opening 7 of the hard sleeve 6 is located and the end face of the endoscope lens 4 is less than 4mm, and the stopper 9 arranged at the front end is also made of PEEK material, that is, it is integrally formed with the hard sleeve 6, and the forward extension of the stopper 9 is not less than 7mm.

[0055] For this implementation, the connected inner diameter outer sleeve structure sample was tested and detected by optical imaging equipment. One end of the endoscope outer sleeve structure was connected to a vacuum pump (-80 kPa) and the other end was sealed. The air was continuously pumped for 30 minutes, and the change in the inner diameter was observed (using an optical measuring instrument). After testing, the fixed outer sleeve part 3 with the hard sleeve head 6 was kept under a negative pressure of -200 mmHg for 30 minutes, and the inner diameter change rate was ≤5%.

[0056] Then when bent to 180° (radius of curvature ≤ 5mm), the structure must remain stable without collapse or leakage (dynamic test) As an embodiment, referring to Figure 5 The hard sleeve 6 is made of 316L stainless steel and has an annular structure with an axial length of not less than 4mm. The stopper 9 is made of soft material. The hard sleeve 6 is also provided with a slot. The stopper 9 has an enlarged end that penetrates into the slot and forms a clamping limit. The hard sleeve 6 has a main through hole for the endoscope tube body 2 to pass through. The hard sleeve 6 is expanded by heating and is sleeved on the surface of the endoscope tube body 2 close to the endoscope lens 4. The distance between the end face where the channel opening 7 of the fixed hard sleeve 6 is located and the end face of the endoscope lens 4 is less than 4mm, and the forward extension of the stopper 9 is not less than 7mm.

[0057] In this arrangement, the main through hole is offset along the center of the diameter of the cross section of the hard sleeve 6, and the main through hole is offset on the cross section of the hard sleeve 6 to form a thin part and a thick part that wrap the endoscope tube body 2, and the external pipeline is located in the thick part.

[0058] A plurality of deformation clamping parts 8 are provided on the thin part, and the cross-sectional size of the main through hole is larger than the cross-sectional size of the endoscope tube body 2. When the hard sleeve 6 is sleeved on the surface of the endoscope tube body 2, a bulge that presses inward is formed by squeezing the deformation clamping part 8. The inner diameter of the main through hole is reduced by the deformation clamping part 8 that forms the bulge inward to clamp and limit the endoscope tube body 2.

[0059] Further, refer to Figure 7-Figure 9 The figure shows another implementation of the hard sleeve 6, that is, a variable diameter sleeve structure formed by unilateral expansion of the hard sleeve 6, one end connected to the fixed outer sleeve 3 is the same size as the fixed outer sleeve 3, and continuously expands unilaterally toward the endoscope lens 4 to form an enlarged end, so that the size of the channel opening 7 becomes larger, and a larger stopper 9 is provided at the channel opening 7 for guidance.

[0060] The stopper 9 and the hard sleeve 6 are both integrally formed of hard materials. The slideway of the stopper 9 smoothly changes the direction of the channel parallel to the axis direction of the end face of the endoscope lens 4, so that its final opening direction has an angle greater than zero and less than ninety degrees with the end face of the endoscope lens 4, generally sixty degrees. When in use, the clamping claw extending from the channel port of the endoscope lens 4 can be operated in real time in the picture fed back under the endoscope, grab the target object at the front end of the endoscope lens 4 and drag it to the endoscope lens 4. At this time, the negative pressure state is maintained at the stopper 9 by connecting the external end of the external pipe with the air pressure adsorption device. When the clamping claw drags the target object to the corresponding position, it can be adsorbed by the negative pressure area of ​​the stopper 9 above, and the target object can pass through the slideway, the channel port 7, and the external pipe and then fall out. The whole process is completely under the lens viewing angle, which is convenient for operation.

[0061] In order to achieve a better adsorption effect, a row of teeth is provided at the end of the stopper 9, and the row of teeth faces the front end of the endoscope lens 4, but does not protrude from the stopper 9 to avoid contact with the inner wall of the bile duct during sliding. When the dragged tissue has a certain viscosity or a large volume, direct negative pressure adsorption may block the slideway. At this time, the target object is pulled by the clamping claws, and then when it reaches the lower part of the stopper 9, the target object has an upward movement trend, and at this time it will contact the row of teeth, and a cutting effect can be formed under the action of the adsorption force, and the target object can be broken into small volumes and sucked out separately.

[0062] The present invention is not limited to the above optional implementations, and anyone can derive other various forms of products under the enlightenment of the present invention. The above specific implementations should not be understood as limiting the scope of protection of the present invention. The scope of protection of the present invention should be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A biliary endoscope jacket structure, arranged outside an endoscope tube body (2) of a biliary endoscope, characterized in that: It comprises at least one closed external pipe, wherein the external pipe is fixed to the outer surface of the endoscope tube body (2) along the length direction of the endoscope tube body (2) by a fixing structure; The external pipeline has ports communicating with the space outside the instrument channel at both ends of the instrument channel through which the biliary endoscope passes through the colonoscope, and a hard sleeve (6) fixed on the endoscope tube body (2) is provided on the port near the end of the biliary endoscope at the endoscope lens (4), and the hard sleeve (6) has a channel opening (7) communicating with the external pipeline; The hard sleeve head (6) has a stopper head (9) on the end surface with the passage opening (7) which surrounds the endoscope lens (4) and protrudes outwards. The stopper head (9) has a slideway which is connected to the passage opening (7) and extends toward the endoscope lens (4). The stopper head (9) also has an arc-shaped head which covers the slideway and provides guidance at the front portion facing the advancing direction of the endoscope tube body (2).

2. A biliary endoscope jacket structure according to claim 1, characterized in that: The fixing structure is a plurality of collars arranged at equal intervals along the length direction of the endoscope tube body (2), and the collars bind the external pipe to the inner wall surface of the endoscope tube body (2).

3. A biliary endoscope jacket structure according to claim 1, characterized in that: The circumferential wrap angle of the external pipe around the endoscope tube body (2) is less than 360 degrees.

4. A biliary endoscope jacket structure according to claim 1, characterized in that: The fixing structure is an elastic sleeve which is sleeved outside the endoscope tube body (2) and is independent of the external pipe. The thickness of the elastic sleeve is smaller than the cross-sectional radius of the external pipe, and the inner wall of the elastic sleeve fits the outer wall of the endoscope tube body (2) and the external pipe.

5. The biliary endoscope jacket structure according to claim 1, characterized in that: The fixed structure is a fixed outer sleeve (3) which is sleeved outside the endoscope tube body (2) and has elasticity; the external pipeline is an integrated pipeline structure arranged in the tube wall of the fixed outer sleeve (3); the external pipeline is fixedly connected to the hard sleeve head (6), and the port of the external sleeve is in communication with the channel opening (7) of the hard sleeve head (6).

6. A biliary endoscope jacket structure according to claim 5, characterized in that: The hard sleeve (6) is made of PEEK material and has an annular structure with an axial length of not less than 5 mm. The hard sleeve (6) has a main through hole for the endoscope tube body (2) to pass through. The inner wall of the main through hole of the hard sleeve (6) is softened by inserting an electric heating wire into the main channel and heated to a temperature of 170°C-260°C, and then sleeved on the surface of the endoscope tube body (2) close to the endoscope lens (4). After being fixed, the distance between the end face where the channel opening (7) of the hard sleeve (6) is located and the end face of the endoscope lens (4) is less than 4 mm, and the forward extension of the stopper (9) is not less than 7 mm.

7. A biliary endoscope jacket structure according to claim 5, characterized in that: The hard sleeve (6) is made of 316L stainless steel and has an annular structure with an axial length of not less than 4 mm. The stopper (9) is made of a soft material. The hard sleeve (6) is also provided with a slot. The stopper (9) has an enlarged end that penetrates into the slot and forms a clamping limit. The hard sleeve (6) has a main through hole for the endoscope tube body (2) to pass through. The hard sleeve (6) is expanded by heating and sleeved on the surface of the endoscope tube body (2) close to the endoscope lens (4). After being fixed, the distance between the end face where the channel opening (7) of the hard sleeve (6) is located and the end face of the endoscope lens (4) is less than 4 mm, and the forward extension of the stopper (9) is not less than 7 mm.

8. The biliary endoscope jacket structure according to claim 5, characterized in that: The main through hole of the hard sleeve (6) is offset along the center of the diameter of the cross section of the hard sleeve (6), and the main through hole is offset on the cross section of the hard sleeve (6) to form a thin part and a thick part that wrap the endoscope tube body (2), and the external pipe is located in the thick part; A plurality of deformable pressing portions (8) are provided on the thin portion, the cross-sectional dimensions of the main through hole being larger than the cross-sectional dimensions of the endoscope tube body (2), and when the hard sleeve (6) is sleeved on the surface of the endoscope tube body (2), an inwardly pressing protrusion is formed by squeezing the deformable pressing portion (8), and the inner diameter of the main through hole is reduced by the inwardly formed protrusion of the deformable pressing portion (8), thereby engaging and limiting the endoscope tube body (2).

9. A biliary endoscope jacket structure according to claim 6 or 8, characterized in that: A nickel-titanium alloy wire braided layer with a wall thickness of 0.5-0.7 mm is embedded in the external pipe of the fixed outer sleeve (3), and the fixed outer sleeve (3) is connected to the hard sleeve (6) by adhesive or hot melting. The nickel-titanium alloy wire braided layer extends out of the connection end of the external pipe and the hard sleeve (6) with a length of not less than 2 mm, and the connection end is embedded in the inner wall of the hard sleeve (6).

10. A biliary endoscope jacket structure according to any one of claims 5 to 8, characterized in that: The external conduit of the fixed outer sleeve (3) is connected to a separate connecting pipe head (5) at a port connected to the space outside the instrument channel at the outer end of the biliary endoscope passing through the instrument channel of the colonoscope. The connecting pipe head (5) and the fixed outer sleeve (3) are an integrated structure. The fixed outer sleeve (3) has a connecting pipe head (5) extending outwardly from an end surface on one side of the external channel. The end of the connecting pipe head (5) has a universal connector for connecting an air nozzle and an expansion nozzle.

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