Elastic super-selection loach type bourdon tube lens system
By providing a spirally arranged elastic metal wire and hydrophilic coating in the endoscopic insertion catheter, the problem of insufficient flexibility and torque control of the insertion part is solved, and better operability and durability are achieved, and the risk of trauma is reduced.
Patent Information
- Application Number
- CN202421374339.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-06-17
AI Technical Summary
The existing endoscopic insertion part has poor flexibility and torsion control, resulting in inconvenient operation and discomfort in the patient.
A spiral-arranged elastic wire is provided in the insertion catheter and a hydrophilic coating is applied to the periphery to enhance flexibility and strength while providing good torsional control and handling.
It improves the flexibility and strength of the insertion catheter, increases service life, reduces the risk of trauma to the human body, and enhances the ability to pass in complex cavity channels.
Smart Images
Figure CN223054439U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of endoscopes, in particular to an elastic super-selective eel-shaped spring tube endoscope system. Background Art
[0002] An endoscope is a commonly used medical auxiliary instrument in the medical field. By inserting it into the human body cavity, the specific situation inside the human body cavity can be directly observed, and lesions are easily identified. The main structures of existing endoscopes include an operation part, an insertion part, a catheter hose, a light guide plug head, etc. The insertion part is the main component inserted into the human body cavity, and its safety and maneuverability are relatively important. Most existing insertion parts are catheter structures formed by wrapping various bundles of tubes with polymers. Although they can be used and have low costs, their flexibility and torsion control are not good, which is not conducive to medical staff's operation and will also cause discomfort to patients. Summary of the Invention
[0003] The purpose of the utility model is to provide an elastic super-selective eel-shaped spring tube endoscope system aiming at the problems existing in the prior art.
[0004] To achieve the above purpose, the technical scheme adopted by the utility model is:
[0005] An elastic super-selective eel-shaped spring tube endoscope system includes an operation part and an insertion catheter connected to the operation part. At least a first channel, a second channel, a third channel, and a fourth channel are provided in the insertion catheter. The cross-sectional dimension of the fourth channel is larger than that of the third channel. The cross-sectional dimension of the third channel is not less than that of the first channel or the second channel. A lens assembly is provided in the third channel. The lens assembly at least includes an image guide bundle arranged in the third channel and a lens imaging module arranged at the front end of the insertion catheter and connected to the image guide bundle. Elastic metal wires are provided in the tube wall of the insertion catheter. The elastic metal wires are spirally arranged along the length direction of the insertion catheter. A hydrophilic coating is further provided on the outer periphery of the insertion catheter.
[0006] By improving the structure of the insertion catheter, the elastic super-selective eel-shaped spring tube endoscope system has better flexibility and strength. It not only has good torsion control and is convenient for operation, but also has a thin-wall and large-cavity structure, which is convenient for arranging internal pipelines or bundles of tubes and can be well applied to endoscopes in urology and hepatobiliary surgery.
[0007] Compound elastic metal wires in the insertion catheter, which can not only enhance its strength and flexibility, but also make it have better elasticity and variable adaptability, can adapt to different shapes by itself, and has good fatigue resistance. It is not easy to damage the tube body during long-term bending, so the service life of the insertion catheter is increased.
[0008] By arranging the elastic metal wire in a spiral pattern, the strength and stability of the original tube body can be enhanced, and the composite insertion catheter becomes anisotropic, with deformation performance adapted to its position under different bending states and angles, providing excellent tracking and maneuverability with good support.
[0009] In some embodiments, the spiral of the elastic metal wire is arranged to be denser from the end near the operation part to the end far from the operation part. In some embodiments, the spirals formed by the elastic metal wire are arranged in a gradually denser and then sparser and then denser and then sparser cyclic pattern.
[0010] According to the density of the spiral arrangement of the elastic metal wire, the insertion catheter can have different flexibility and elasticity at different positions. This form of being sparse first and then dense makes the front end have stronger support and better pushability, which is beneficial for the efficient placement of the insertion catheter.
[0011] Furthermore, the elastic metal wire is a stainless steel wire or a nitinol wire, the body of the insertion catheter is a polyurethane hose or a fluoropolymer hose, and the hydrophilic coating is one of a PVP coating, a PAM coating, a PEG coating, and a PVA coating.
[0012] Furthermore, the outer diameter of the insertion catheter is 3 - 10 mm, the diameter of the elastic metal wire is 0.2 - 1 mm, and the average thickness of the hydrophilic coating is 10 - 200 microns.
[0013] In some embodiments, the cross-section of the fourth channel is an oval large channel with a minor axis dimension of not less than 3 mm; the third channel, the second channel, and the first channel are respectively circular channels, the diameter of the third channel is 1 - 1.5 mm, and the diameters of the second channel and the first channel are both 0.8 - 1 mm.
[0014] Preferably, the minor axis dimension of the oval large channel is 3 mm, the major axis dimension is 4.5 mm, the diameter of the third channel is 1.3 mm, and the diameters of the second channel and the first channel are both 1 mm; the third channel, the second channel, and the first channel are above the fourth channel, and the third channel is located between the first channel and the second channel.
[0015] In some embodiments, at least one lens light is further provided near the lens imaging module at the end of the insertion catheter.
[0016] In some embodiments, a main connector is provided at the end of the operation part, and a cable channel and an auxiliary connector are provided on both sides; the main connector is connected to the fourth channel, the cable channel communicates with the third channel, and the auxiliary connector is connected to the second channel and the first channel.
[0017] The fourth channel can be used as an instrument channel so that the treatment instrument can reach the lesion along with the inserted catheter, and the second channel and the first channel can be used as water and air pipelines.
[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: 1. The elastic super-selected loach-type spring tube endoscope system improves the structure of the insertion catheter to make it have better flexibility and strength. It not only has good twist control and is easy to operate, but also has a thin-walled and large-cavity structure, which is convenient for setting internal pipelines or tube bundles, and can be well used in endoscopes of urology and hepatobiliary surgery; 2. The composite elastic metal wire in the insertion catheter can not only enhance its strength and flexibility, but also make it have better elasticity and adaptability, can adapt to different shapes by itself, and has good anti-fatigue performance. It is not easy to damage the tube body during long-term bending. The service life of the insertion catheter is increased; 3. The elastic metal wire can enhance the strength and stability of the original tube body through spiral arrangement, and the composite insertion catheter has anisotropy, and has deformation properties adapted to the position under different bending states and angles, and better support provides excellent tracking and controllability; 4. The setting of the hydrophilic coating forms a smooth gel on the surface of the insertion catheter after encountering liquid, which increases lubricity and reduces friction, making the catheter very lubricated, making it easier to insert the insertion catheter, and continuously smooth, and can pass through various complex stenosis very well, effectively reducing the risk of trauma. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a structural schematic diagram of an elastic super-selection loach-type spring tube mirror system of the utility model;
[0020] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure at the insertion point of the catheter A;
[0021] Figure 3 Schematic diagram of the metal wire spiral inserted into the catheter of the utility model
[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the tube wall of the insertion catheter of the utility model;
[0023] Figure 5 Another structural schematic diagram of the tube wall cross section of the insertion catheter of the utility model;
[0024] In the figure: 1. operating part; 2. insertion catheter; 3. fourth channel; 4. third channel; 5. second channel; 6. first channel; 7. lens imaging module; 8. lens light; 9. elastic metal wire; 10. hydrophilic coating; 11. main connector; 12. auxiliary connector; 13. cable channel; 14. cable. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "middle", "upper", "lower", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0027] like Figures 1 to 4 As shown, an elastic super-selected loach-type spring tube mirror system includes an operating part 1, and an insertion catheter 2 connected to the operating part 1, wherein the insertion catheter 2 is provided with at least a first channel 6, a second channel 5, a third channel 4 and a fourth channel 3, the cross-sectional dimension of the fourth channel 3 is larger than the cross-sectional dimension of the third channel 4, and the cross-sectional dimension of the third channel 4 is not smaller than the cross-sectional dimension of the first channel 6 or the second channel 5, and a lens assembly is provided in the third channel 4, and the lens assembly at least includes an image guide bundle arranged in the third channel 4, and a lens imaging module 7 arranged at the front end of the insertion catheter 2 and connected to the image guide bundle; an elastic metal wire 9 is provided in the tube wall of the insertion catheter 2, and the elastic metal wire 9 is spirally arranged along the length direction of the insertion catheter 2, and a hydrophilic coating 10 is also provided on the periphery of the insertion catheter 2.
[0028] The elastic super-selected loach-shaped spring tube endoscope system improves the structure of the insertion catheter 2 to make it have better flexibility and strength. It not only has good twist control and is easy to operate, but also has a thin-walled and large-cavity structure, which is convenient for setting up internal pipelines or tube bundles. It can be well used in endoscopes such as urology, hepatobiliary surgery and vascular surgery.
[0029] Through the above settings, the elastic super-selective loach-shaped spring tube mirror system has good selectivity, that is, targeted selection. Super-selectivity is to take the selectivity a step further, to make a more refined and accurate selection. Taking the selection of blood vessels as an example, if the blood vessels are selectively selected for interventional treatment, the accuracy may not be high enough. In this case, super-selection is required to select the next level of blood vessels for interventional treatment, which may have a better effect.
[0030] The composite elastic metal wire 9 in the insertion catheter 2 can not only enhance its strength and flexibility, but also make it have better elasticity and adaptability, can adapt to different shapes by itself, has good anti-fatigue performance, and is not easy to damage the tube body during long-term bending, thereby increasing the service life of the insertion catheter.
[0031] The insertion catheter 2 has good flexibility, can effectively avoid damaging internal devices or cavities of the human body, and can adapt well to the shape and direction of the human body cavity; the insertion catheter 2 has moderate hardness and good strength. While being flexible, it is also easy to push in irregular human cavities and has excellent maneuverability.
[0032] The elastic metal wire 9 can enhance the strength and stability of the original tube body through spiral arrangement, and make the composite insertion catheter 2 anisotropic, with deformation performance adapted to the position under different bending states and angles, and better support provides excellent tracking and controllability.
[0033] The hydrophilic coating 10 forms a smooth gel on the surface of the insertion catheter after encountering liquid, which increases lubricity and reduces friction, making the catheter very lubricated, making it easier to insert the insertion catheter, and continuing to be smooth, and can pass through various complex stenosis very well, effectively reducing the risk of trauma.
[0034] In some embodiments, the spiral of the elastic metal wire 9 is arranged gradually densely from the end close to the operating portion 1 to the end away from the operating portion 1. According to the density of the spiral arrangement of the elastic metal wire 9, the insertion catheter 2 can have different flexibility and elasticity at different positions. This form of first sparse and then dense makes the front end (the end away from the operating portion) more supportive and better pushing performance, which is conducive to the efficient placement of the insertion catheter.
[0035] In some embodiments, Figure 5 As shown, the spiral formed by the elastic metal wire 9 is arranged in a cyclic manner from sparse to dense. This arrangement is a cyclic gradual change from section to section. The sparse or dense structure allows the insertion catheter to be soft or hard.
[0036] Furthermore, the elastic metal wire 9 is a stainless steel wire or a nickel-titanium alloy wire, one of which has a lower cost and the other has better mechanical properties and a longer service life; from the cross-sectional shape, it can be a round wire or a flat wire. The use of a flat wire can reduce the wall thickness of the catheter and increase the inner diameter of the catheter to accommodate the tube bundle.
[0037] The body of the insertion catheter 2 is a polyurethane hose or a fluoropolymer hose, and the hydrophilic coating 10 is one of a PVP coating, a PAM coating, a PEG coating, and a PVA coating.
[0038] The surface lubrication modification of the catheter is carried out by coating hydrophilic polymer materials such as polyvinylpyrrolidone (PVP), polyacrylamide (PAM), polyethylene glycol (PEG), polyvinyl alcohol (PVA), natural polysaccharides and derivatives. Its advantages also include good mechanical properties, which are conducive to solving the problem of poor adhesion of the coating. At the same time, an antibacterial surface is constructed on the surface of the medical catheter by compounding antibacterial agents in the coating to prevent infections caused by the intervention of the medical catheter.
[0039] Furthermore, the outer diameter of the insertion catheter 2 is 3 - 10 mm, preferably 4 - 5 mm, the diameter of the elastic metal wire 9 is 0.2 - 1 mm, preferably 0.3 mm, and the average thickness of the hydrophilic coating 10 is 10 - 200 microns.
[0040] In some embodiments, the insertion catheter 2 is provided with an oval large channel (the fourth channel 3) and a plurality of small channels (the third channel 4, the second channel 5, and the first channel 6) arranged on one side of the large channel.
[0041] The major axis dimension of the large channel is about 4.5 mm, and the minor axis dimension is about 3 mm. The large channel allows instruments to pass through. The middle third channel 4 has a diameter of about 1.3 mm and is used to arrange the image guide bundle and the lens imaging module. The second channels 5 and the first channels 6 on both sides have a diameter of about 1 mm and can be used as channels for gas conduction, water conduction, light conduction, etc.
[0042] For a flexible endoscope, direct observation or observation with the aid of an external camera is required to achieve display on a display terminal. Therefore, its operation part is equipped with an eyepiece or is connected to an imaging display through a cable. Two optical fiber bundles (or cables) can be arranged inside the third channel: one is a light guide bundle, and its function is to transmit the light source to the lesion end to provide illumination. The other is the image guide bundle, which is a group of optical fibers (optical cables) composed of many single optical fibers. Its flexibility allows it to bend to a certain extent without breaking. The image guide bundle is the image channel connecting the lens imaging module, and it can transmit the lesion situation to clinical users. At least one lens light (a miniature LED light) is further provided near the lens imaging module at the end of the insertion catheter, and the lens light is connected to the light guide bundle to play the role of end illumination.
[0043] For example, the lens imaging module 7 may be a CCD imaging module. The end of the third channel 4 has a receiving cavity for mounting the CCD imaging module. The CCD imaging module includes a CCD imaging chip and an objective lens group. The objective lens group is arranged at the forefront. The CCD imaging chip is connected to the light guide beam. After the CCD imaging system acquires an image and the image is converted into an electrical signal, it is transmitted to the image processing system via a cable and then displayed on a high-definition display, enabling clinical users to observe the lesion conditions.
[0044] In some embodiments, a main connector 11 is provided at the end of the operation part 1, and cable channels 13 and auxiliary connectors 12 are provided on both sides; the main connector 11 is connected to the fourth channel 3, the cable channels 13 communicate with the third channel 4 and are connected to a cable 14, and the auxiliary connector 12 is connected to the second channel 5 and the first channel 6. A plurality of knobs are also provided on the operation part 1.
[0045] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An elastic super-selective loach-type spring tube endoscope system, comprising an operating part and an insertion catheter connected to the operating part, characterized in that, At least a first channel, a second channel, a third channel and a fourth channel are provided inside the insertion catheter. The cross-sectional dimension of the fourth channel is larger than that of the third channel. The cross-sectional dimension of the third channel is not less than that of the first channel or the second channel. A lens assembly is provided inside the third channel. The lens assembly at least includes an image guide bundle disposed inside the third channel and a lens imaging module disposed at the front end of the insertion catheter and connected to the image guide bundle. An elastic metal wire is provided inside the tube wall of the insertion catheter. The elastic metal wire is spirally arranged along the length direction of the insertion catheter. A hydrophilic coating is further provided on the outer periphery of the insertion catheter.
2. The elastic super-selective loach-shaped bourdon tube endoscope system according to claim 1, wherein The spiral of the elastic metal wire is arranged in a gradually denser manner from the end close to the operation part to the end far from the operation part.
3. The elastic super-selective loach-shaped bourdon tube endoscope system according to claim 1, characterized in that, The spirals formed by the elastic metal wire are arranged in a gradually denser and then gradually sparser manner in a segmented and cyclic manner.
4. The elastic super-selective loach-shaped spring tube endoscope system according to claim 1, wherein The elastic metal wire is a stainless steel wire or a nitinol wire. The body of the insertion catheter is a polyurethane hose or a fluoropolymer hose. The hydrophilic coating is one of a PVP coating, a PAM coating, a PEG coating and a PVA coating.
5. The elastic super-selective loach-shaped bourdon tube endoscope system according to claim 1, wherein The outer diameter of the insertion catheter is 3-10 mm. The diameter of the elastic metal wire is 0.2-1 mm. The average thickness of the hydrophilic coating is 10-200 microns.
6. The elastic super-selective loach-shaped bourdon tube endoscope system according to claim 1, characterized in that, The cross-section of the fourth channel is an oval large channel, and the short-axis dimension is not less than 3 mm. The third channel, the second channel and the first channel are respectively circular channels. The diameter of the third channel is 1-1.5 mm. The diameters of the second channel and the first channel are both 0.8-1 mm.
7. The elastic super-selective loach-shaped spring tube endoscope system according to claim 6, wherein, The short-axis dimension of the oval large channel is 3 mm, and the long-axis dimension is 4.5 mm. The diameter of the third channel is 1.3 mm. The diameters of the second channel and the first channel are both 1 mm.
8. The elastic super-selective loach-shaped spring tube endoscope system according to claim 1, characterized in that At least one lens light is further provided at the end of the insertion catheter near the lens imaging module.
9. The elastic super-selective loach-shaped bourdon tube endoscope system according to claim 1, characterized in that, The end of the operation part is provided with a main joint, and a cable channel and an auxiliary joint are provided on both sides. The main joint is connected to the fourth channel. The cable channel communicates with the third channel. The auxiliary joint is connected to the second channel and the first channel.