Head-end-bendable ureter leading-in sheath with fixed balloon device

Abstract

The utility model relates to the technical field of ureter leading-in sheaths, solves the technical problem that a leading-in sheath cannot be limited in a urethra, and particularly relates to a ureter leading-in sheath with a bendable head end and a fixed balloon device, which comprises a protective tube serving as a supporting foundation, the inner side of the protection tube is provided with a limiting and steering assembly used for limiting and steering the guide-in sheath, the limiting and steering assembly is provided with a calculus discharging assembly used for discharging calculus broken stone, the limiting and steering assembly comprises a guide-out tube arranged on the inner side of the protection tube, and one end of the guide-out tube is connected with a limiting bag. Due to the arrangement of the limiting steering assembly, after the guiding-in sheath is inserted into the pelvis, the balloon is limited in the bladder by injecting water into the limiting bag, the stability of the guiding-in sheath in the urethra can be improved, and the fixing sheath can effectively reduce the pressure of the pelvis and reduce the risk of infection.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ureteral introducer sheath, especially to a head end bendable with fixed balloon ureteral introducer sheath. BACKGROUND

[0002] The ureteral introducer sheath is a kind of medical instrument commonly used in urological surgery, mainly used to establish the channel for endoscope and other instruments to enter urinary tract, to assist to complete ureteroscopy, holmium laser lithotripsy and other operations of ureteral flexible mirror.But the existing ureteral introducer sheath will slide in the ureter after entering the bladder due to smooth surface, thereby affecting the result of operation. SUMMARY

[0003] In view of the deficiency of prior art, the utility model provides a head end bendable with fixed balloon ureteral introducer sheath, solves the technical problem that the introducer sheath cannot be positioned in urethra, and achieves the purpose of improving operation success rate.

[0004] To solve the above technical problems, the utility model provides the following technical scheme: a head end bendable with fixed balloon ureteral introducer sheath, including the protection pipe as the support base, the protection pipe inside is provided with the positioner and the steering assembly for the positioner steering, the positioner and steering assembly are provided with the stone discharge assembly for discharging stone on the positioner and steering assembly;

[0005] The positioner and steering assembly includes the lead-out pipe arranged in the protection pipe inside, one end of the lead-out pipe is connected with the positioner, the positioner inside is provided with the water injection cavity, the lead-out pipe inside upper portion is provided with the positioner water injection pipe that is connected to the positioner inside, the lead-out pipe is connected with the guide pipe at the positioner and the lead-out pipe away from the positioner one end, the positioner and the lead-out pipe connection place both sides are connected with the steering folding pipe, the lead-out pipe inside both sides are provided with the steering water injection pipe.

[0006] Preferably, the steering water injection pipe water outlet end is connected with the steering folding pipe inside.

[0007] Preferably, the guide pipe is conical, and the maximum diameter of the guide pipe and the positioner is less than the maximum diameter of the protection pipe.

[0008] Preferably, the stone discharge assembly includes the discharge cavity arranged in the middle of the lead-out pipe, the positioner and the guide pipe inside, the lead-out pipe is connected with the connecting pipe below the lead-out pipe away from the guide pipe one end, the connecting pipe is connected with the negative pressure tank away from the lead-out pipe one end, and the control valve is installed at the negative pressure tank and the lead-out pipe connection place.

[0009] Preferably, the two turning water injection pipes and the limiting water injection pipe extend through the end of the guide pipe to the outside of the guide pipe, and the end of the turning water injection pipe and the limiting water injection pipe extending out of the guide pipe is connected with a butt joint pipe.

[0010] Preferably, the guide pipe is slidingly connected to the inside of the protection pipe and is not attached to the inner wall of the protection pipe, and the outside of the protection pipe is coated with a hydrophilic coating.

[0011] By the above technical scheme, the utility model provides a head end bendable with a fixed balloon ureteral catheterization sheath, at least has the following beneficial effects:

[0012] 1. The utility model discloses a limiting turning assembly, which can limit the balloon in the bladder after being inserted into the renal pelvis by injecting water into the limiting balloon, thereby improving the stability of the catheterization sheath in the urethra and reducing the risk of infection.

[0013] 2. The utility model discloses a stone discharge assembly, which can discharge the broken stones without direct contact with the outside world by the suction force generated by the negative pressure tank, thereby realizing the discharge of the broken stones. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the application without imposing undue limitation thereon.

[0015] In the drawings:

[0016] Fig. 1 It is a three-dimensional structure schematic view of the utility model;

[0017] Fig. 2 It is a hydrophilic coating installation structure schematic view of the utility model;

[0018] Fig. 3 It is a limiting balloon cross section structure schematic view of the utility model.

[0019] In the drawings: 1, protection pipe; 2, limiting turning assembly; 21, guide pipe; 22, limiting balloon; 23, water injection cavity; 24, limiting water injection pipe; 25, guide pipe; 26, turning folding pipe; 27, turning water injection pipe;

[0020] 3, stone discharge assembly; 31, discharge cavity; 32, connecting pipe; 33, negative pressure tank; 34, control valve;

[0021] 4, butt joint pipe; 5, hydrophilic coating. DETAILED DESCRIPTION

[0022] With reference to the drawings and embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0023] Embodiment 1

[0024] The existing ureteral introducer sheath will slide inside the ureter after entering the bladder due to the smooth surface, thereby affecting the surgical result. Please refer to Figs. 1-3 The present application provides a head-end bendable tube fixing balloon ureteral introducer sheath, which solves the technical problem that the ureteral introducer sheath cannot be positioned in the urethra. The device comprises a protection tube 1 as a support base, a limiting and turning assembly 2 for limiting and turning the ureteral introducer sheath is arranged on the inner side of the protection tube 1, and a stone discharge assembly 3 for discharging stones is arranged on the limiting and turning assembly 2. The limiting and turning assembly 2 limits the ureteral introducer sheath, and the stone discharge assembly 3 can discharge stones.

[0025] The existing ureteral introducer sheath will slide inside the ureter after entering the bladder due to the smooth surface, thereby affecting the surgical result. In order to solve such problems, the limiting and turning assembly 2 is proposed. The limiting and turning assembly 2 comprises a leading-out tube 21 arranged on the inner side of the protection tube 1, one end of the leading-out tube 21 is connected to a limiting balloon 22, a water injection cavity 23 is formed in the inner side of the limiting balloon 22, water is injected into the inner side of the limiting balloon 22 through the water injection cavity 23, so that the limiting balloon 22 is inflated to realize the limiting function, a limiting water injection tube 24 that communicates with the inner side of the water injection cavity 23 is formed in the upper inner side of the leading-out tube 21, a guide tube 25 is connected to the end of the leading-out tube 21 away from the limiting balloon 22, the guide tube 25 is conical, and the maximum diameters of the guide tube 25 and the limiting balloon 22 are both smaller than the maximum diameter of the protection tube 1, turning folding tubes 26 are connected to the two sides of the connection between the limiting balloon 22 and the leading-out tube 21, turning water injection tubes 27 are formed in the inner sides of the leading-out tube 21, water is injected into the inner sides of the turning folding tubes 26 through the turning water injection tubes 27, so that the turning folding tubes 26 are inflated, thereby driving the leading-out tube 21 connected thereto to turn, the water outlet end of the turning water injection tube 27 communicates with the inner side of the proximal turning folding tube 26, which facilitates the position adjustment of the catheter inside the bladder, and when the guide tube 25 enters the inner side of the renal pelvis, the large size of the limiting balloon 22 can reduce the pressure in the renal pelvis and reduce the risk of infection.

[0026] Embodiment 2

[0027] On the basis of embodiment 1, embodiment 1 solves the technical problem that the introduction sheath cannot be positioned in the urethra, but there is still the problem that the crushed stones cannot be timely removed, in combination with Figs. 1-3 As shown in the figure, the specific implementation process is as follows: in order to realize the function of removing the crushed stones, the stone removal assembly 3 comprises a removal cavity 31 which is arranged in the middle of the inside of the guide-out pipe 21, the positioning capsule 22 and the guide pipe 25, the connecting pipe 32 is connected to the lower side of the end of the guide-out pipe 21 away from the guide pipe 25, the negative pressure tank 33 is connected to the end of the connecting pipe 32 away from the guide-out pipe 21, the control valve 34 is installed at the connection between the negative pressure tank 33 and the guide-out pipe 21, the two turning water injection pipes 27 and the positioning water injection pipe 24 extend to the outside of the guide-out pipe 21 away from the end of the guide pipe 25, and the end of the turning water injection pipe 27 and the positioning water injection pipe 24 which extend to the outside of the guide-out pipe 21 is connected with the docking pipe 4.

[0028] In order to prevent the protective pipe 1 from scratching the inner wall of the urethra, the guide-out pipe 21 is slidingly connected to the inside of the protective pipe 1 and does not adhere to the inner wall of the protective pipe 1, the outside of the protective pipe 1 is coated with a hydrophilic coating 5, and the outside coating of the ureter guide sheath mainly adopts a hydrophilic material, such as polyvinylpyrrolidone. This material has good lubricity, which can significantly reduce the friction between the sheath pipe and the urinary tract tissue, and facilitate the placement and operation of the sheath pipe.

[0029] It should be noted that in this paper, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0030] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A flexible-ended ureteral intubation sheath with a fixed balloon, comprising a protective tube (1) as a supporting base, characterized in that: The inner side of the protective tube (1) is provided with a limiting and steering component (2) for limiting and steering the inlet sheath, and the limiting and steering component (2) is provided with a stone discharge component (3) for discharging stone fragments. The limiting steering assembly (2) includes an outlet pipe (21) disposed inside the protective tube (1). One end of the outlet pipe (21) is connected to a limiting bladder (22). A water injection cavity (23) is opened inside the limiting bladder (22). A limiting water injection pipe (24) is opened above the inner side of the outlet pipe (21) and connects to the inner side of the water injection cavity (23). A guide pipe (25) is connected to the end of the outlet pipe (21) away from the limiting bladder (22). Steering folding pipes (26) are connected to both sides of the connection between the limiting bladder (22) and the outlet pipe (21). Steering water injection pipes (27) are opened on both sides inside the outlet pipe (21).

2. The ureteral intubation sheath with a flexible tip and a fixed balloon device according to claim 1, characterized in that: The outlet of the steering water injection pipe (27) is connected to the interior of the nearby steering folding pipe (26).

3. The ureteral intubation sheath with a flexible tip and a fixed balloon device according to claim 1, characterized in that: The guide tube (25) is conical, and the maximum diameter of both the guide tube (25) and the limiting bladder (22) is smaller than the maximum diameter of the protective tube (1).

4. The ureteral intubation sheath with a flexible tip and a fixed balloon device according to claim 1, characterized in that: The stone expulsion assembly (3) includes an expulsion chamber (31) located between the outlet tube (21), the limiting bladder (22), and the guide tube (25). A connecting tube (32) is connected to the lower end of the outlet tube (21) away from the guide tube (25). A negative pressure tank (33) is connected to the lower end of the connecting tube (32) away from the outlet tube (21). A control valve (34) is installed at the connection between the negative pressure tank (33) and the outlet tube (21).

5. A ureteral intubation sheath with a flexible tip and a fixed balloon device according to claim 4, characterized in that: Both of the aforementioned directional water injection pipes (27) and limiting water injection pipes (24) extend through the outer side of the guide pipe (25) to the outside of the outlet pipe (21), and the ends of the directional water injection pipes (27) and limiting water injection pipes (24) extending out of the outside of the outlet pipe (21) are connected to connecting pipes (4).

6. A ureteral intubation sheath with a flexible tip and a fixed balloon device according to claim 1, characterized in that: The outlet tube (21) is slidably connected to the inside of the protective tube (1) and does not fit against the inner wall of the protective tube (1). The outer side of the protective tube (1) is coated with a hydrophilic coating (5).

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