Urinary tract expansion guiding device
Patent Information
- Application Number
- CN202422362997.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-09-26
Smart Images
Figure CN223366069U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a urinary tract dilation guide device. Background Art
[0002] In recent years, to improve stone clearance rates and reduce the use of stone baskets for lithotripsy, urological procedures have increasingly used passively or actively curved sheaths. These sheaths require adjustable bending properties and are constructed of a softer elastic material at the tip. This material, however, lacks sufficient axial support. In clinical practice, patients with ureteral stenosis often experience difficulty inserting the sheath, necessitating a temporary replacement with a smaller or harder sheath that cannot be bent. However, these sheaths offer limited stone clearance efficiency and can cause greater harm to patients if repeatedly inserted. Utility Model Content
[0003] The technical problem to be solved by the embodiments of the present invention is to provide a urinary tract dilation guide device to solve the problem that the sheath cannot be inserted in the prior art, and it is necessary to temporarily replace it with a smaller or harder sheath that cannot be bent. However, this type of sheath cannot achieve better stone removal efficiency, and repeated sheath placement will also cause greater harm to the patient.
[0004] The utility model discloses a urinary tract dilation guide device, comprising: a guide assembly, a first joint and a sheath assembly, the guide assembly comprising: an outer catheter, an inner catheter and an expansion body, the inner catheter is sleeved in the outer catheter and maintains a preset gap with the outer catheter, the outer catheter comprises a first tube body, a transition body and a second tube body connected in sequence, the transition body is formed with a first opening, the expansion body is sleeved on the transition body, and the expansion body is connected to the transition body through the first opening; the width of the first tube body and the transition body is smaller than the width of the narrow section; the first joint is connected along its length An outer catheter hole and an inner catheter hole are formed in the direction of each other; an injection hole is also formed on the side wall of the first joint, the end of the second tube body is arranged in the outer catheter hole, the injection hole is communicated with the outer catheter hole, and the inner catheter extends into the inner catheter hole; the sheath tube assembly includes a second joint and a sheath tube that are connected to each other, the second joint is sleeved on the first joint, and is detachably connected to the first joint, the sheath tube is sleeved on the outer catheter, and the end of the sheath tube extends to the side of the expansion body close to the second tube body; wherein, the expansion body is made of elastic material.
[0005] Optionally, a first positioning ring is provided on the first tube body, and a second positioning ring is provided on the second tube body. Both ends of the expansion body are fixed to the first tube body and the second tube body respectively through the first positioning ring and the second positioning ring, so that the expansion body is sleeved on the transition body.
[0006] Optionally, a plugging head is provided at one end of the first tube body away from the transition body, and a passing hole is formed along the length direction of the plugging head. The passing hole is connected to the inner conduit, and the plugging head is used to plug the end of the first tube body; the outer periphery of the plugging head is a truncated cone structure, and the rear end of the plugging head is connected to the first tube body.
[0007] Optionally, the outer diameter of the first tube body is 1 mm to 1.5 mm, and the outer diameter of the second tube body is 3 mm to 4.5 mm.
[0008] Optionally, the opening section of the transition body is in a "U"-shaped structure; when the expansion body is in a contracted state, it fits with the outer periphery of the transition body.
[0009] Optionally, the outer circumference of the first positioning ring is a truncated cone structure, and the front end of the first positioning ring is arranged close to one side of the first tube body.
[0010] Optionally, a bonding hole is formed along the radial direction of the first connector, and the bonding hole is connected to the inner catheter hole; a guide wire hole is provided on the side of the first connector away from the outer catheter hole, and the guide wire hole is connected to the inner catheter, and the guide wire hole has a conical structure, and the bottom of the conical structure is located at the end of the first connector.
[0011] Optionally, a clamping platform is provided on the first connector, a clamping slot with a notch is formed on the second connector, and the clamping platform is snap-connected to the clamping slot.
[0012] Optionally, a mounting cavity is formed on the second tube body along its length, and a second opening is also formed on the side wall of the first connector; the urinary tract expansion guide device also includes: a display, an image adapter board, an LED light source and a camera module; the display and the image adapter board are connected through a signal power line and are arranged on the outside of the first connector; an optical sealant is arranged between one end of the mounting cavity close to the expansion body and the expansion body, the LED light source and the camera module are arranged in the mounting cavity close to the end of the optical sealant, and the camera module is also connected to one end of the data cable, and the other end of the data cable extends from the mounting cavity and extends along the second opening to the outside of the first connector and is connected to the image adapter board; the expansion body is made of transparent material.
[0013] Optionally, the outer surface of the outer catheter and the outer surface of the sheath are both provided with a hydrophilic coating.
[0014] Compared with the prior art, the beneficial effect of the urinary tract dilation guide device provided by the embodiment of the present invention is that: during use of the urinary tract dilation guide device, it is necessary to reach the patient's lesion area under the guidance of the guide wire with the help of a guide wire. Specifically, the guide wire is extended into the inner catheter hole along one side of the first connector, enters the inner catheter, and extends along the end of the inner catheter away from the first connector. The guide wire is manipulated to allow the guide wire to enter the patient's body along the urethra; the medical staff manipulates the first connector to extend the guide component into the urethra along one end of the first tube body, and the sheath follows the guide component and enters the urethra synchronously. The width of the first tube body and the transition body is set to be smaller than the width of the narrow section. Therefore, the first tube body can pass smoothly. The stenosis section is controlled, and the transition body is positioned in the stenosis section. The expansion component is injected into the first connector along the injection hole. The expansion component enters the preset gap between the inner and outer catheters along the outer catheter hole. When it flows to the transition body, the expansion component enters the expansion body along the first opening. As the expansion component continues to increase, the elastic expansion body expands and is in an expanded state to stretch the stenosis section. At this time, the first connector is continued to be manipulated to extend the guide assembly into the patient's body. The sheath can move forward synchronously with the guide assembly and smoothly pass through the stretched stenosis section to reach the patient's lesion position. At the same time, the first connector is separated from the second connector, and the first connector is controlled to move the guide assembly out of the sheath to complete the placement of the sheath in the patient's body. The urinary tract expansion guide device of the present utility model embodiment, in the cooperation of the guide assembly, the first connector and the sheath assembly, does not need to replace a smaller or harder sheath that cannot be bent, and can successfully complete the sheath placement work at one time, reducing damage to the patient while ensuring stone removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:
[0016] Figure 1 This is a schematic structural diagram of the urinary tract guide dilation device provided by an embodiment of the present invention, in which the dilation body is in a contracted state during application;
[0017] Figure 2 This is a structural schematic diagram of the expansion body of the urinary tract guide expansion device provided by an embodiment of the present utility model in an expanded state during application;
[0018] Figure 3 This is a schematic structural diagram of the guide assembly and the first joint provided by an embodiment of the present utility model;
[0019] Figure 4 This is a front view of the outer catheter provided by an embodiment of the present utility model;
[0020] Figure 5 is a top view of the outer catheter provided by an embodiment of the present utility model;
[0021] Figure 6 This is a schematic structural diagram of an outer catheter and an inner catheter provided by an embodiment of the present utility model;
[0022] Figure 7 This is a schematic cross-sectional view of the guide assembly provided by an embodiment of the present utility model in a retracted state;
[0023] Figure 8 1 is a schematic cross-sectional structural diagram of the guide assembly provided by an embodiment of the present utility model in an expanded state;
[0024] Figure 9 This is a schematic structural diagram of a first connector provided by an embodiment of the present utility model;
[0025] Figure 10 It is a structural schematic diagram of the urinary tract dilation guide device provided in an embodiment of the present utility model.
[0026] The reference numerals in the figures are:
[0027] 10. Guide assembly; 110. Outer catheter; 111. First tube; 112. Transition body; 1121. First opening; 113. Second tube; 1301. Mounting cavity; 120. Inner catheter; 130. Expansion body; 140. First positioning ring; 150. Second positioning ring; 160. Sealing head; 1601. Transition hole; 101. Preset gap; 20. First joint; 201. Outer catheter hole; 202. Inner catheter hole; 203. Injection hole; 204. Adhesive hole; 205. Guide wire hole; 206. Second opening; 210, card table; 220, injection tube; 230, syringe; 231, expansion component; 310, second connector; 3101, card slot; 3102, notch; 320, sheath; 410, display; 420, image adapter board; 430, LED light source; 440, camera module; 450, signal power line; 460, optical sealant; 470, data cable; 510, ureter; 520, bladder; 530, prostate; 540, stricture segment; 550, urethra; 60, guide wire. DETAILED DESCRIPTION
[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. Now, in conjunction with the accompanying drawings, a detailed description of the preferred embodiments of the present utility model will be given.
[0029] The present invention provides a urinary tract dilation guide device. Figures 1 to 9As shown, it includes: a guide assembly 10, a first connector 20 and a sheath assembly, the guide assembly 10 includes: an outer catheter 110, an inner catheter 120 and an expansion body 130, the inner catheter 120 is sleeved in the outer catheter 110, and maintains a preset gap 101 with the outer catheter 110, the outer catheter 110 includes a first tube body 111, a transition body 112 and a second tube body 113 connected in sequence, the transition body 112 is formed with a first opening 1121, the expansion body 130 is sleeved on the transition body 112, and the expansion body 130 is connected to the transition body 112 through the first opening 1121; the width of the first tube body 111 and the transition body 112 is less than the width of the narrow section 540; the first connector 20 is arranged along its length The outer catheter 110 hole and the inner catheter 120 hole are formed in the direction of being interconnected; an injection hole 203 is also formed on the side wall of the first joint 20, and the end of the second tube body 113 is arranged in the hole of the outer catheter 110, the injection hole 203 is communicated with the hole of the outer catheter 110, and the inner catheter 120 extends into the hole of the inner catheter 120; the sheath assembly includes a second joint 310 and a sheath tube 320 that are interconnected, the second joint 310 is sleeved on the first joint 20, and is detachably connected to the first joint 20, the sheath tube 320 is sleeved on the outer catheter 110, and the end of the sheath tube 320 extends to the side of the expansion body 130 close to the second tube body 113; wherein, the expansion body 130 is made of elastic material.
[0030] During use of the above urinary tract dilation guide device, it is necessary to reach the patient's lesion area with the help of a guide wire 60 under the guidance of the guide wire 60. Specifically, the guide wire 60 is extended into the hole of the inner catheter 120 along one side of the first connector 20, enters the inner catheter 120, and extends along the end of the inner catheter 120 away from the first connector 20. The guide wire 60 is manipulated to allow the guide wire 60 to enter the patient's body along the urethra 550 and reach the lesion; the medical staff manipulates the first connector 20 to extend the guide assembly 10 into the urethra 550 along one end of the first tube body 111. At this time, the expansion body 130 is in a contracted state, and the sheath 320 follows the guide assembly 10 to synchronously enter the urethra 550. The width of the first tube body 111 and the transition body 112 is set to be smaller than the width of the stenosis section 540. Therefore, the first tube body 111 can smoothly pass through the stenosis section 540, and control the transition body 112 to be located in the stenosis. At the narrow section 540, the expansion component 231 is injected into the first connector 20 along the injection hole 203, and the expansion component 231 enters the preset gap 101 between the inner catheter 120 and the outer catheter 110 along the hole of the outer catheter 110. When it flows to the transition body 112, the expansion component 231 enters the expansion body 130 along the first opening 1121. As the expansion component 231 continues to increase, the elastic expansion body 130 expands and is in an expanded state to expand the narrow section 540. At this time, the first connector 20 is continued to be manipulated to extend the guide component 10 into the patient's body. The sheath 320 can move forward synchronously with the guide component 10 and smoothly pass through the expanded narrow section 540 to reach the patient's lesion position. At the same time, the first connector 20 is separated from the second connector 310, and the first connector 20 is controlled to move the guide component 10 out of the sheath 320 to complete the placement of the sheath 320 in the patient's body. The urinary tract dilation guide device of the embodiment of the utility model, with the cooperation of the guide component 10, the first connector 20 and the sheath tube component, does not need to replace the sheath tube 320 with a smaller or harder sheath tube 320 that cannot be bent. The sheath tube 320 can be smoothly inserted in one go, reducing harm to the patient while ensuring the stone removal efficiency.
[0031] The injection tube 220 is provided with a syringe 230, and an expansion component 231 is provided in the syringe 230. The expansion component 231 can be injected into the injection tube 220 by controlling the syringe 230. The expansion component 231 can be pure water, saline or air, etc., and can be selected according to actual working conditions. It is not specifically limited here. Figure 4 The width along direction a is the width of the first tube body 111 and the transition body 112 .
[0032] Reference Figure 1 and Figure 2 , an example is given in which the stricture section 540 is located in the patient's urethra 550. Of course, when the stricture is located in the ureter or bladder, the sheath insertion method remains unchanged.
[0033] As a preferred solution of this embodiment, refer to Figures 3 to 8 A first positioning ring 140 is provided on the first tube body 111, and a second positioning ring 150 is provided on the second tube body 113. The two ends of the expansion body 130 are respectively fixed on the first tube body 111 and the second tube body 113 through the first positioning ring 140 and the second positioning ring 150, so that the expansion body 130 is sleeved on the transition body 112.
[0034] Among them, an example of setting the expansion body 130 on the outer catheter 110 is given here. Specifically, by setting a first positioning ring 140 on the first tube body 111 and a second positioning ring 150 on the second tube body 113, the two ends of the expansion body 130 are forged on the lower parts of the first positioning ring 140 and the second positioning ring 150 respectively, thereby realizing a fixed connection between the expansion body 130 and the outer catheter 110, thereby improving the use stability of the urinary tract expansion guide device of this embodiment.
[0035] In this embodiment, the first and second positioning rings 140 and 150 are 1 mm to 2 mm long, not specifically limited herein. The first and second positioning rings 140 and 150 are made of a developing material, including but not limited to platinum-iridium, tantalum, and other materials. Both ends of the first and second positioning rings 140 and 150 are provided with arcuate surfaces along their lengths to ensure that the guide assembly 10 does not damage the patient's mucous membranes during its entry and exit.
[0036] The structures of the first positioning ring 140 and the second positioning ring 150 are not specifically limited. Here, a structural example is given. The first positioning ring 140 is a truncated cone structure with a small front opening and a large rear opening. The second positioning ring 150 is annular.
[0037] For ease of representation, the end where the first tube 111 is provided is defined as the front end, and the direction where the guide wire hole 205 is provided in the first connector 20 is defined as the rear end.
[0038] As a preferred solution of this embodiment, refer to Figures 6 to 8 A plugging head 160 is provided at one end of the first tube body 111 away from the transition body 112. The plugging head 160 has a passing hole 1601 formed along its length direction. The passing hole 1601 is connected to the inner conduit 120. The plugging head 160 is used to plug the end of the first tube body 111; the outer periphery of the plugging head 160 is a frustum-shaped structure, and the rear end of the plugging head 160 is connected to the first tube body 111.
[0039] The purpose of providing a plugging head 160 to seal the end of the first tube 111 is to close the preset gap 101 between the first tube 111 and the inner catheter 120. During injection of the expansion component 231, the expansion component 231 enters the expansion body 130 through the first opening 1121, improving expansion efficiency while preventing the expansion component 231 from flowing into the patient's body along the end of the first tube 111. The outer periphery of the plugging head 160 is configured as a truncated cone, and the rear end of the plugging head 160 is connected to the transition body 112 to prevent damage to the human mucosa during insertion of the guide assembly 10. The rear end of the plugging head 160 can be connected to the first tube 111 through sealing bonding, or the plugging head 160 and the first tube 111 can be integrally molded, providing a certain pressure-bearing capacity. A pass-through hole 1601 is formed along its length, and the pass-through hole 1601 is connected to the inner catheter 120 to provide a suitable environment for the guidewire 60.
[0040] As a preferred embodiment of this embodiment, the outer diameter of the first tube 111 is 1 mm to 1.5 mm, and the outer diameter of the second tube 113 is 3 mm to 4.5 mm. The outer diameter of the first tube 111 can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, or 1.5 mm; the outer diameter of the second tube 113 can be 3 mm, 3.5 mm, 4.0 mm, or 4.5 mm.
[0041] The above arrangement of the first tube body 111 and the second tube body 113 facilitates the arrangement of the guide assembly 10 in the narrow section 540 and is also matched with the sheath tube 320 to ensure the sheath placement effect.
[0042] As a preferred solution of this embodiment, refer to Figure 4 and Figure 7 The opening section of the transition body 112 is in a "U"-shaped structure; when the expansion body 130 is in a contracted state, it fits with the outer periphery of the transition body 112.
[0043] Among them, the opening section of the transition body 112 is set to a "U"-shaped structure with good bending properties, which can improve the softness of the transition body 112, reduce the axial force of the outer catheter 110, and reduce the friction between the patient and the outer catheter 110 during entry, thereby reducing mucosal damage, making it easier to reach the narrow section 540, and easier to expand the narrow section 540 and expand the narrow section 540.
[0044] The transition body 112 can be formed by cutting with a tool or by integral molding.
[0045] When the expansion body 130 is in the contracted state, it fits against the outer periphery of the transition body 112 , thereby improving the integration of the expansion body 130 and the transition body 112 , making it easier for the transition body 112 and the expansion body 130 to be positioned in the narrow section 540 .
[0046] As a preferred solution of this embodiment, refer to Figure 3 and Figure 9 The first connector 20 is formed with a bonding hole 204 along its radial direction, and the bonding hole 204 is connected to the hole of the inner catheter 120; a guide wire hole 205 is provided on the side of the first connector 20 away from the hole of the outer catheter 110, and the guide wire hole 205 is connected to the inner catheter 120. The guide wire hole 205 has a conical structure, and the bottom of the conical structure is located at the end of the first connector 20.
[0047] Among them, the purpose of setting the bonding hole 204 is to be able to inject glue along the bonding hole 204, and the bonding hole 204 is connected with the hole of the inner catheter 120. The glue enters the hole of the inner catheter 120 to fix the inner catheter 120 on the first joint 20, thereby ensuring the stability of the setting of the inner catheter 120; the setting of the guide wire hole 205 can enable guide wires 60 of different specifications to enter the first joint 20 smoothly. The guide wire hole 205 has a conical structure, which facilitates the guide wire 60 to enter the first joint 20 along the guide wire hole 205 and reach the inner catheter 120.
[0048] As a preferred solution of this embodiment, refer to Figures 1 to 3 A clamping platform 210 is provided on the first connector 20 , and a clamping slot 3101 with a notch 3102 is formed on the second connector 310 , and the clamping platform 210 is snap-connected with the clamping slot 3101 .
[0049] Here, an example of a detachable connection between a first connector 20 and a second connector 310 is given. Specifically, when connecting the first connector 20 and the second connector 310, the second connector 310 is sleeved on a section of the first connector 20, and the card base 210 is set in the card slot 3101 along the notch 3102. The first connector 20 is rotated clockwise to insert the card base 210 into the card slot 3101; when disassembling the first connector 20 and the second connector 310, the first connector 20 is rotated counterclockwise to take the card base 210 out of the notch 3102.
[0050] As a preferred solution of this embodiment, refer to Figure 10A mounting cavity 1301 is formed on the second tube 113 along its length, and a second opening 206 is also formed on the side wall of the first connector 20; the urinary tract dilation guide device also includes: a display 410, an image adapter plate 420, an LED light source 430 and a camera module 440; the display 410 and the image adapter plate 420 are connected by a signal power line 450 and are arranged outside the first connector 20; an optical sealant 460 is arranged between one end of the mounting cavity 1301 close to the expansion body 130 and the expansion body 130, the LED light source 430 and the camera module 440 are arranged in the mounting cavity 1301 close to one end of the optical sealant 460, and the camera module 440 is also connected to one end of the data cable 470, and the other end of the data cable 470 extends from the mounting cavity 1301 and extends along the second opening 206 to the outside of the first connector 20, and is connected to the image adapter plate 420, and the expansion body 130 is made of transparent material.
[0051] The installation cavity 1301 and the second opening 206 are provided to provide an installation and setting environment for the LED light source 430 and the camera module 440. The LED light source 430 is used to fill in the light for the camera module 440, thereby improving the shooting effect of the camera module 440. The LED light source 430 and the camera module 440 are arranged in the installation cavity 1301 by an optical sealant 460. The optical sealant 460 does not affect the shooting effect of the camera module 440. In actual use, the sheath 320 cooperates with the guide assembly 10 to reach the lesion of the stenosis section 540 through the guide wire 60. At the same time, the operator can obtain the expansion state of the stenosis section 540 inside the human body and the image of entering the lesion through the camera module 440, and display it on the display screen through the data cable 470, the image adapter board 420 and the signal power cable 450 to assist the work of medical staff.
[0052] As a preferred solution of this embodiment, a hydrophilic coating is provided on the outer surface of the outer catheter 110 and the outer surface of the sheath tube 320 .
[0053] The hydrophilic coating in this embodiment is made of polyvinyl pyrrolidone to improve biocompatibility and lubricity. The provision of the hydrophilic coating can reduce the harm to the patient when the urinary tract dilation guide device of this embodiment is inserted into the patient's body.
[0054] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art may modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.
Claims
1. A urinary tract dilation guide device, characterized in that: include: The guide assembly includes: an outer catheter, an inner catheter, and an expansion body. The inner catheter is sleeved within the outer catheter and maintains a preset gap with the outer catheter. The outer catheter includes a first tube body, a transition body, and a second tube body connected in sequence. The transition body is formed with a first opening. The expansion body is sleeved on the transition body and communicates with the transition body through the first opening. The width of the first tube body and the transition body is smaller than the width of the stenosis. A first joint having an outer conduit hole and an inner conduit hole formed along its length and connected to each other; a liquid injection hole is also formed on a side wall of the first joint, an end portion of the second tube body is disposed in the outer conduit hole, the liquid injection hole is communicated with the outer conduit hole, and the inner conduit extends into the inner conduit hole; A sheath assembly, comprising a second connector and a sheath connected to each other, wherein the second connector is sleeved on the first connector and is detachably connected to the first connector, the sheath is sleeved on the outer catheter, and the distal end of the sheath extends to a side of the expansion body close to the second tube body; Wherein, the expansion body is made of elastic material.
2. The urinary tract dilation guide device according to claim 1, characterized in that: The first tube body is provided with a first positioning ring, the second tube body is provided with a second positioning ring, and both ends of the expansion body are fixed to the first tube body and the second tube body respectively through the first positioning ring and the second positioning ring, so that the expansion body is sleeved on the transition body.
3. The urinary tract dilation guide device according to claim 2, characterized in that: A plugging head is provided at one end of the first tube body away from the transition body, and a passing hole is formed along the length direction of the plugging head, the passing hole is communicated with the inner conduit, and the plugging head is used to plug the end of the first tube body; The outer periphery of the plugging head is in a truncated cone-shaped structure, and the rear end of the plugging head is connected to the first tube body.
4. The urinary tract dilation guide device according to claim 2, characterized in that: The outer diameter of the first tube is 1 mm to 1.5 mm, and the outer diameter of the second tube is 3 mm to 4.5 mm.
5. The urinary tract dilation guide device according to claim 2, characterized in that: The transition body opening section is a "U" shaped structure; When the expansion body is in the contracted state, it fits with the outer periphery of the transition body.
6. The urinary tract dilation guide device according to claim 2, characterized in that: The outer periphery of the first positioning ring is in a truncated cone-shaped structure, and the front end of the first positioning ring is arranged close to one side of the first tube body.
7. The urinary tract dilation guide device according to claim 1, characterized in that: The first joint is formed with a bonding hole along its radial direction, and the bonding hole is communicated with the inner conduit hole; A guide wire hole is provided on a side of the first connector away from the outer catheter hole. The guide wire hole is communicated with the inner catheter. The guide wire hole is in a conical structure, and the bottom of the conical structure is located at the end of the first connector.
8. The urinary tract dilation guide device according to claim 1, characterized in that: A clamping platform is provided on the first connector, a clamping slot with a notch is formed on the second connector, and the clamping platform is connected to the clamping slot by a buckle.
9. The urinary tract dilation guide device according to claim 1, characterized in that: The second tube body is formed with a mounting cavity along its length, and a second opening is also formed on the side wall of the first joint; The urinary tract dilation guide device further includes: a display, an image adapter board, an LED light source and a camera module; The display and the image transfer board are connected via a signal power line and are arranged outside the first connector; An optical sealant is provided between one end of the mounting cavity close to the expansion body and the expansion body, the LED light source and the camera module are provided in the mounting cavity close to the end of the optical sealant, the camera module is further connected to one end of a data cable, and the other end of the data cable extends from the mounting cavity and along the second opening to the outside of the first connector, and is connected to the image adapter board; The expansion body is made of transparent material.
10. The urinary tract dilation guide device according to any one of claims 1 to 9, characterized in that: The outer surface of the outer catheter and the outer surface of the sheath are both provided with a hydrophilic coating.