Self-expanding umbrella-shaped extractor

Abstract

The utility model discloses a self-expanding umbrella-shaped extractor which comprises a handle. An outer pipe is fixed in the handle, and the outer pipe penetrates out of one end of the handle and extends to the outside; an inner pipe capable of moving in the axial direction of the outer pipe is arranged in the outer pipe, a blocking component is fixed to one end of the inner pipe, and a blocking film is arranged on the surface of the blocking component. The shape of the self-expanding umbrella-shaped ureteral calculus blocking and removing catheter can be accurately controlled manually, the self-expanding umbrella-shaped ureteral calculus blocking and removing catheter can be easily placed in a ureter, calculus cannot be pushed to retrograde to the kidney, ureteral wall damage cannot be caused, the opening diameter of the umbrella shape can be adjusted timely to completely block the ureter, and the catheter is convenient to use. The calculus and calculus fragments are effectively prevented from being flushed back into the kidney by perfusion water flow, the condition of calculus incarceration is not prone to occurring, deformation and ureter wall friction are not prone to occurring in the dragging and calculus removing process, all calculus can be taken out at a time, and the purpose of efficient calculus removal is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of medical apparatus and instruments, and particularly relates to a self-expanding umbrella-shaped extractor. BACKGROUND

[0002] The incidence of urinary calculi is as high as 5%-10%, and can be found in any part of the kidney, bladder, ureter and urethra, and kidney and ureteral calculi are common. Ureteroscopy lithotripsy is performed through the natural cavity of the human body, has the advantages of small trauma and accurate lithotripsy, and is one of the main treatment methods for ureteral calculi. However, there are still some deficiencies in the current ureteroscopy lithotripsy: 1. Ureteral calculi and stone fragments in the middle and upper segments of the ureter are easily washed back into the kidney by the backwash of the perfusion water flow or the lithotripsy tool; 2. There is no quick and effective way to remove the residual stone fragments in the ureteral lumen.

[0003] Blocking the ureteral calculi above by the tool is an important means to prevent the ureteral calculi from being washed back into the kidney, and there are some ureteral occluders in clinical use. Under normal circumstances, such calculi blocking tools also have the function of removing the calculi. However, these ureteral occluders still have some shortcomings in actual use, for example, the occluder is prone to deformation, which leads to uncertain effect, and even causes the failure of the device, and at the same time, some calculi have the possibility of escaping from the occluder, which affects the removal effect. UTILITY MODEL CONTENTS

[0004] The utility model aims at: in order to solve the above problems, the utility model provides a self-expanding umbrella-shaped extractor.

[0005] The utility model discloses a specific adoption of the following technical scheme in order to realize the above-mentioned purpose:

[0006] A self-expanding umbrella-shaped extractor, comprising a handle;

[0007] The outer tube is fixed in the handle, and the outer tube extends to the outside from one end of the handle;

[0008] The inner tube is movably arranged in the outer tube in the axial direction, one end of the inner tube is fixed with a blocking part, and the surface of the blocking part is provided with a blocking film.

[0009] As a further description of the above technical scheme, the blocking part is a blocking stone net, and the blocking stone net comprises a plurality of metal wires.

[0010] As a further description of the above technical scheme, the metal wires are in a diagonal divergent shape, and the distal ends of adjacent metal wires are intertwined and converge at the distal end.

[0011] As a further description of the above technical scheme, the number of metal wires is 2-50.

[0012] As a further description of the above technical solution, the thickness of the blocking film is 0.001-1mm, and the material of the blocking film is one or a combination of PU, TPU, PTFE, PE and Nylon.

[0013] As a further description of the above technical solution, one end of the handle is provided with a locking device, the locking device comprises a locking knob, the locking knob is connected to one end of the handle through threads, and the locking knob is used for adjusting the opening of one end of the handle to realize the fixation of the inner tube.

[0014] As a further description of the above technical solution, the blocking stone net comprises a remover main body and a connecting wire connected with the inner tube, and the connecting wire is integrally formed with the side of the remover main body.

[0015] As a further description of the above technical solution, the inner tube is a hollow tube.

[0016] As a further description of the above technical solution, the maximum diameter of the blocking stone net is 1-30mm.

[0017] As a further description of the above technical solution, the surface of the handle is provided with a slidable push block, the push block is connected with the inner tube, and the push block is used for pushing the inner tube to slide in the handle.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1、The self-expanding umbrella-shaped ureteral calculus blocking and stone removing catheter in the utility model can be accurately controlled artificially, is easy to be placed into the ureter, cannot push the calculus to retrograde to the kidney and cause the damage of the ureteral wall, can timely adjust the diameter of the umbrella-shaped opening to completely block the ureter, effectively prevents the calculus and calculus fragments from being flushed back into the kidney by the perfusion flow, is not easy to cause the calculus incarceration, is not easy to deform and rub the ureteral wall in the dragging and removing process, can remove all the calculus at one time, and the purpose of efficient calculus removal is achieved.

[0020] In order to more clearly set forth the structural features and effects of the utility model, the utility model will be described in detail below by combining with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the perspective view of the remover of the utility model;

[0022] Figure 2 is the schematic view of the blocking stone net and the inner tube of the utility model;

[0023] Figure 3 is the schematic view of the blocking film of the utility model;

[0024] Figure 4 is a schematic view of the metal wire of the stone blocking net of the utility model;

[0025] Figure 5 is a sectional view of the handle of the utility model;

[0026] Figure 6 is a sectional view of the handle cooperating with the locking device of the utility model;

[0027] Figure 7 is a schematic view of the handle of the utility model with an opening at one end;

[0028] Figure 8 is a schematic view of the extractor in use.

[0029] Reference signs: 1, handle; 2, outer tube; 3, inner tube; 4, stone blocking net; 6, blocking film; 7, locking knob; 8, opening; 9, push block; 10, fixing assembly. DETAILED DESCRIPTION

[0030] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model.

[0031] As Figures 1-8 shown, in one embodiment, a self-expanding umbrella-shaped extractor, specifically a self-expanding umbrella-shaped ureteral calculus blocking and stone extracting catheter, comprises a handle 1, an outer tube 2, a blocking component, i.e., a stone blocking net 4, a blocking film 6 and an inner tube 3, the stone blocking net 4 is an umbrella-shaped net structure woven by a plurality of metal wires and the stone blocking net 4 is fixed with the blocking film 6, the stone blocking net 4 is fixed on the inner tube 3 through a fixing assembly 10, wherein the fixing assembly 10 can be an annular thin-walled metal tube, also can be a tubular object wound by a thin metal wire, in some embodiments, also can be an adhesive, which can be selected according to actual needs.

[0032] The stone blocking net 4 and the blocking film 6 are retracted in the outer tube 2 when not working, after being released from the outer tube 2 by pushing the handle 1 and the inner tube 3 when working, the self-expanding umbrella-shaped stone blocking net 4 and the blocking film 6 are opened to block the calculus, after being retracted and pulled into the outer tube 2 again after the work is completed, the whole is withdrawn from the body.

[0033] Reference Figures 6-7The self-expanding umbrella-shaped ureteral stone blocking and removal catheter is also equipped with a locking device. When the blocking net 4 is opened and forms an umbrella shape, the locking knob 7 is used to make it contact the inner tube 3, thereby restricting the blocking net 4 and keeping it in an umbrella shape. The locking device is located on the handle 1, at the front end of the handle 1, and is connected to the handle 1 by a screw. By rotating the degree of connection between the locking device and the handle 1, the length of the inner tube 3 extending out of the outer tube 2 can be adjusted, thereby adjusting the diameter of the blocking net 4. This allows the diameter of the blocking net 4 to be precisely controlled by human intervention and is suitable for different locations.

[0034] refer to Figure 4 Optionally, the number of metal wires is an integer between 2 and 50. The rock-blocking mesh 4 can be woven from metal wires of equal diameter or two or more diameters of metal wires alternately, and there can be a variety of weaving patterns.

[0035] Optionally, the outer tube 2 is a hollow thin-walled tube, and the material can be metal, plastic, polymer, etc. The inner tube 3 is a hollow thin-walled tube, and the material can be metal, plastic, polymer, etc. The thickness of the sealing membrane 6 is 0.001-1mm, and the material of the sealing membrane 6 is one or a combination of PU, TPU, PTFE, PE and Nylon.

[0036] refer to Figures 6-7 Optionally, the locking device includes a locking knob 7, which is threaded to one end of the handle 1. The locking knob 7 is used to adjust the opening 8 at one end of the handle 1 to fix the inner tube 3. The locking device is a locking knob 7 with internal threads, which is fixed to one end of the handle 1. The opening 8 at one end of the handle 1 can be adjusted according to the distance the locking knob 7 is screwed into the handle 1 to adjust its inner diameter. When the locking knob 7 is completely locked to one end of the handle 1, the inner tube 3 can be fixed through the opening 8, thereby adjusting the relative position between the inner tube 3 and the handle 1. Therefore, the outer diameter of the sealing and blocking mesh 4 can be adjusted to achieve a tight fit without damaging the ureter.

[0037] refer to Figure 1 and Figure 5 Optionally, the surface of the handle 1 is provided with a slidable push block 9, which is connected to the inner tube 3. The push block 9 is used to push the inner tube 3 to slide inside the handle 1. The push block 9 can drive the inner tube 3 to move inside the handle 1. After the inner tube 3 moves to the target position, it can be fixed by a locking device.

[0038] refer to Figure 2Optionally, the occlusion stone blocking net 4 comprises a main body and a connecting wire connected with the inner tube 3, the connecting wire is integrally formed with the side of the main body, specifically, when the occlusion stone blocking net 4 is in the working state, the occlusion stone blocking net 4 is laterally one side, the outer tube 2 and the inner tube 3 are close to the ureter wall, do not affect the process of laser lithotripsy, at the same time, effectively avoid the risk of damaging the outer tube 2 and the inner tube 3 by laser.

[0039] Optionally, the maximum diameter of the occlusion stone blocking net 4 is 1-30mm, specifically, the maximum diameter of the occlusion stone blocking net 4 is greater than or equal to 1mm and less than or equal to 30mm.

[0040] Working principle: reference Figure 8 , during ureteroscopy lithotripsy, the endoscope is first inserted, and the instrument is inserted after the stone is found. Hold the handle 1, insert the self-expanding umbrella-shaped ureteral stone occlusion and extraction catheter into the working channel of the endoscope, guide under the indication of the endoscope, make the instrument bypass the stone and reach above the stone, then push the block 9 to the distal end to push the occlusion stone blocking net 4 out of the outer tube 2 and open the umbrella shape; if the diameter of the stone fragment is small, it is suitable to be discharged into the bladder from the ureter, then water can be injected into the ureter through the working channel of the endoscope, and the self-expanding umbrella-shaped ureteral stone occlusion and extraction catheter of the application is pulled to the bladder end, so that the stone is finally pulled into the bladder; if the size of the stone fragment is large, further laser crushing is required, after the stone is completely crushed, the laser fiber is withdrawn, and the above water injection and downward pulling operation of the occlusion stone blocking net 4 is repeated until the stone is completely flushed into the bladder. During the operation, the outer diameter of the occlusion stone blocking net 4 can be adjusted according to the diameter of different parts of the patient's ureter to realize close fitting and not damage the ureter wall.

[0041] Optionally, the inner tube 3 is a homogeneous hollow tube, that is, from the distal end of the inner tube 3 to the proximal end of the inner tube 3, a through cavity is arranged in the center, before use, the occlusion stone blocking net 4 is completely placed in the middle tube, and when used, the occlusion stone blocking net 4 is released from the middle tube above the stone. This scheme does not use additional guide wire as a guide device.

[0042] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-expanding umbrella retrieval device, characterized in that, The handle comprises an outer tube fixed in the handle, the outer tube extending from one end of the handle to the outside; The inner tube is movably arranged in the outer tube, one end of the inner tube being fixed with a blocking member, the surface of the blocking member being provided with a blocking film. The blocking member is a blocking stone net, the blocking stone net comprising a plurality of metal wires.

2. The self-inflating umbrella retrieval device of claim 1, wherein, The metal wires are obliquely divergent and the distal ends of adjacent metal wires are intertwined.

3. The self-inflating umbrella retrieval device of claim 2, wherein, The number of the metal wires is 2-50.

4. The self-inflating umbrella retrieval device of claim 2, wherein, The thickness of the blocking film is 0.001-1mm, and the material of the blocking film is any one of PU, TPU, PTFE, PE and Nylon.

5. The self-inflating umbrella retrieval device of claim 1, wherein, One end of the handle is provided with a locking device, the locking device comprising a locking knob, the locking knob being threadedly connected to one end of the handle, the locking knob being used for adjusting the opening of one end of the handle to fix the inner tube.

6. The self-inflating umbrella retrieval device of claim 1, wherein, The blocking stone net comprises a remover main body and a connecting wire connected with the inner tube, the connecting wire being integrally formed with the side of the remover main body.

7. The self-inflating umbrella retrieval device of claim 2, wherein, The inner tube is a hollow tube.

8. The self-inflating umbrella retrieval device of claim 1, wherein, The maximum diameter of the blocking stone net is 1-30mm.

9. The self-inflating umbrella retrieval device of claim 2, wherein, The surface of the handle is provided with a slidable push block, the push block being connected with the inner tube, the push block being used for pushing the inner tube to slide in the handle.

10. The self-inflating umbrella retrieval device of claim 1, wherein, ​

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