Ureteral double-arc deformation sleeve stone basket and deformation operation method thereof

Abstract

The application discloses a ureter double-arc deformation sleeve stone basket and a deformation operation method thereof, which comprises a guide sleeve, a movable tube slidably sleeved in the guide sleeve, a blade head connected to one end of the movable tube penetrating through the guide sleeve, a sealing and inflatable expansion film arranged on the outer circumferential surface of the guide sleeve and close to the blade head, an expansion sleeve basket connected between the blade head and the guide sleeve and inflated and bulged by pushing and pulling the movable tube, an inflation structure arranged on the end of the movable tube opposite to the blade head, and the inflation structure being in communication with the inside of the expansion film. The expansion film and the expansion sleeve basket form a deformable stone basket which integrates the functions of expanding the ureter, deforming the sleeve stone and taking the stone, and the deformation operation method based on the structure can accurately adjust the deformation size of the expansion film, and then facilitates the blade head to pass through the rear of the stone, or simultaneously adopts the double-arc deformation and expansion of the stone by the expansion sleeve basket and the expansion film, so that the stone taking efficiency or the stone taking efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a ureter double-arc deformation stone basket and a deformation operation method thereof. BACKGROUND

[0002] Ureteral calculi is a common disease in urology, and the basket stone extraction in ureteroscopy is an important surgical method. In order to prevent the upward movement of the stone, the drift into the renal pelvis, and the residual problem of stone fragments, the basket is extended into the rear of the stone to extract the stone. The current basket structure is relatively simple, which mainly relies on the expanded basket net to directly wrap the stone, and the stone extraction effect in the narrow space is not ideal.

[0003] The specific operation problem is mainly that during the stone extraction process, the space inside the ureter is very narrow, and the stone often blocks the main channel of the ureter, so that the head of the basket is easy to directly touch the stone when trying to extend into the rear of the stone, and then the stone may be pushed in the opposite direction, thereby causing part of the stone to move upward to the renal pelvis or causing further damage to the ureter. Especially when the stone is large or the position is complex, it is more difficult to extend the basket into the rear of the stone, or the stone is easy to leak out of the gap of the basket net during pulling, which not only increases the number of stone extraction, but also increases the risk of damage to the ureter of the patient.

[0004] Through the increasing work operation, a double-arc variable deformation stone basket is designed to effectively prevent the reverse movement of the stone and improve the stone extraction efficiency. SUMMARY

[0005] The present application proposes a ureter double-arc deformation stone basket and a deformation operation method thereof to solve the problems raised in the background.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] A ureter double-arc deformation stone basket, comprising a guide sleeve, an active pipe slidably sleeved in the guide sleeve, a blade head connected to one end of the active pipe penetrating the guide sleeve, a sealing and inflatable expansion membrane arranged near the outer peripheral surface of the guide sleeve of the blade head, an expansion basket connected between the blade head and the guide sleeve and inflated and bulged by pushing and pulling the active pipe, an inflation structure arranged at the end of the active pipe opposite to the blade head, the inflation structure being in communication with the inside of the expansion membrane, and the expansion membrane and the expansion basket forming a variable deformation stone basket integrating the expansion of the ureter, the double-arc deformation of the stone, and the extraction of the stone.

[0008] Preferably, one end of the guide sleeve near the inflatable structure is provided with a tail seat, two guide rods are fixedly connected to the side opposite to the tail seat, the ends of the two guide rods opposite to the tail seat are fixedly connected to a limiting seat, an active plate is slidably penetrated on the two guide rods, and the end of the active tube penetrates the middle of the active plate and the middle of the limiting seat in sequence, wherein the active plate and the active tube are fixedly connected, the active tube and the limiting seat are movably penetrated, and the end of the active tube penetrating out of the limiting seat is connected with the inflatable structure. By pulling the active plate towards the limiting seat, the vane head is driven to move through the active tube, the distance between the vane head and the guide sleeve is gradually reduced, and the inflatable sleeve basket is gradually lifted, so as to realize the function of freely controlling the expansion of the inflatable sleeve basket and the size of the lifting, and facilitate the fine adjustment of the size of the different positions in the ureter for stone removal.

[0009] Preferably, a spring is arranged between the limiting seat and the active plate, and the spring is sleeved on the outer circumferential side of the active tube. The limiting seat and the active plate are separated by the elasticity of the spring, and the inflatable sleeve basket is automatically reset.

[0010] Preferably, the outer circumferential surface of the vane head is provided with an inner groove, the inflatable membrane is a circular ring-shaped flexible soft membrane, the two sides of the inflatable membrane are respectively sealed and fixed to the left and right sides in the inner groove, and the active tube is provided with a flow channel communicating with the inner groove. The end of the flow channel opposite to the inner groove is in communication with the inflation structure. The inflation structure inflates the inner groove through the flow channel, and the inflatable membrane is inflated, and the inflation size of the inflatable membrane can be freely adjusted.

[0011] Preferably, the inflation structure comprises a piston needle cylinder arranged at the end of the active tube penetrating the limiting seat, an inner part of the piston needle cylinder is in communication with the flow channel, a tail cover is arranged at the end of the piston needle cylinder opposite to the flow channel, and a push-pull rod is threadedly connected to the middle of the tail cover. The top end of the push-pull rod is connected with a handle, and the end of the push-pull rod located in the inner part of the piston needle cylinder is connected with a piston main body through a bearing. The push-pull rod is rotated by screwing, the accuracy of the piston main body descending in the piston needle cylinder is improved, and the effect of accurately controlling the inflation size of the inflatable membrane is achieved.

[0012] Preferably, the inflatable sleeve basket comprises a plurality of inflatable soft strips, the two ends of the inflatable soft strips are respectively connected to the end sides of the vane head and the end sides of the guide sleeve, the inflatable soft strips are arranged in a ring shape side by side, and a flexible basket net is sleeved on the outer circumferential side of the inflatable soft strips. The inflatable soft strips and the flexible basket net are both medical metal guide wires or metal wire meshes, which are not limited.

[0013] A deformation operation method based on the double-layer deformation stone basket, comprising the following steps:

[0014] 1) When the guide sleeve (1) is inserted into the ureter with the blade head (3) as the front end, and encounters a stone obstruction, the handle (15) is manually rotated, the handle (15) is connected with the push-pull rod (14) and moves in the tail cover (13) in a threaded manner, and then the push-pull rod (14) pushes the piston body (16) in the piston needle cylinder (12) downwards, gas enters the inside of the inflatable membrane (5) through the flow channel (17), the inflatable membrane (5) inflates and swells, forming a deformation, which supports the ureter, so that the gap between the inner wall of the ureter and the stone becomes larger, thereby facilitating the front end of the blade head (3) to pass through the gap to the back side of the stone, and when the front end of the blade head (3) passes through, the inflatable membrane (5) deflates and shrinks, and the inflation and deflation are repeatedly operated with different inflation gas amounts, so that the inflatable blade passes through the back side of the stone or the desired stone removal position in the narrow or twisted part;

[0015] 2) When the blade head (3) and the inflatable sleeve basket (4) are at the back side of the stone or the desired stone removal position, the movable plate (8) is pulled towards the limiting seat (10), the limiting seat (10) drives the movable tube (2) to move in the guide sleeve (1), and then the distance between the end side of the blade head (3) and the end side of the guide sleeve (1) is reduced, so that the inflatable soft strip swells around, drives the flexible basket to deform, forms a basket with a round cake or a ball shape, and inflates the inflatable membrane (5) again, forms a double-arc three-dimensional deformation, forms a double-arc stone removal structure by the inflatable basket and the inflatable membrane (5), and finally pulls the guide sleeve (1) outward to take out the stone through the inflatable basket and the inflatable membrane (5).

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] The inflatable membrane provided on the blade head can be deformed by inflating to any size, thereby locally expanding the size of the inside of the ureter, facilitating the movement of the blade head to extend to the back of the stone or the desired urethral position, and the inflatable sleeve basket is provided between the guide sleeve and the blade head, the inflatable sleeve basket and the inflatable membrane are inflated at the same time, forming a double-arc deformable stone and stone removal structure, effectively improving the deformation of the stone, reducing the number of stone removal, and avoiding damage to the ureter due to repeated stone removal.

[0018] Based on the deformation operation method of the structure, the deformation size of the inflatable membrane is accurately adjusted by rotating the handle, and then the blade head is conveniently passed to the back of the stone, or the inflatable sleeve basket and the inflatable membrane are used to deform and inflate the stone, effectively improving the stone removal efficiency or the stone removal efficiency, and a small deformation structure is used to realize any deformation operation in a narrow space. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an inflatable sleeve basket and inflatable membrane inflation state diagram of the present application;

[0020] Figure 2 Figure 2 is a schematic view of the retracted state of the expansion sleeve basket and the expansion membrane of the present application;

[0021] Figure 3 Figure 3 is a schematic view of the overall structure of the present application;

[0022] Figure 4 Figure 4 is a schematic view of the enlarged A portion of the present application;

[0023] Figure 5 Figure 5 is a schematic view of the expanded state of the expansion sleeve basket and the expansion membrane of the present application;

[0024] 1, guide sleeve; 2, movable tube; 3, blade head; 31, inner groove; 32, inflation structure; 4, expansion sleeve basket; 5, expansion membrane; 7, tail seat; 8, movable plate; 9, guide rod; 10, limiting seat; 11, spring; 12, piston needle cylinder; 13, tail cover; 14, push-pull rod; 15, handle; 16, piston main body; 17, flow-through groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Reference Figures 1-5 A ureter double-arc deformation stone basket, comprising a guide sleeve 1, a movable tube 2 slidably sleeved in the guide sleeve 1, a blade head 3 connected to one end of the movable tube 2 penetrating the guide sleeve 1, a circle of sealed and inflatable expansion membrane 5 arranged on the outer peripheral surface of the guide sleeve 1 close to the blade head 3, an expansion sleeve basket 4 connected between the blade head 3 and the guide sleeve 1 and inflated and raised by pushing and pulling the movable tube 2, an inflation structure 32 arranged on the end of the movable tube 2 opposite to the blade head 3, the inflation structure 32 being in communication with the inside of the expansion membrane 5, and the expansion membrane 5 and the expansion sleeve basket 4 forming a deformation stone basket capable of expanding and supporting the ureter and double-arc stone extraction in one body. The expansion membrane is made of the material of a medical film air bag, which is a mature technology and is not detailed here.

[0027] The guide sleeve 1 is provided with a tail seat 7 near one end of the inflatable structure 32, two guide rods 9 are fixedly connected to the side opposite to the guide sleeve 1, the ends of the two guide rods 9 are fixedly connected to a limiting seat 10, the movable plate 8 is slidably penetrated on the two guide rods 9, and the end of the movable tube 2 is sequentially penetrated through the middle part of the movable plate 8 and the middle part of the limiting seat 10, wherein the movable plate 8 and the movable tube 2 are fixedly connected, the movable tube 2 and the limiting seat 10 are movably penetrated, and the end of the movable tube 2 penetrating out of the limiting seat 10 is connected with the inflatable structure 32. By pulling the movable plate 8 to the limiting seat 10, the vane head 3 is moved by the movable tube 2, the distance between the vane head 3 and the guide sleeve 1 is gradually reduced, and the inflatable sleeve basket 4 is supported, so that the size of the inflatable sleeve basket 4 is freely controlled, and the size of the ureter at different positions is finely adjusted for stone removal.

[0028] The limiting seat 10 and the movable plate 8 are provided with a spring 11, and the spring 11 is sleeved on the outer circumferential side of the movable tube 2. The limiting seat 10 and the movable plate 8 are expanded by the elasticity of the spring 11, and the inflatable sleeve basket 4 is automatically reset.

[0029] The outer circumferential surface of the vane head 3 is provided with an inner groove 31, the inflatable membrane 5 is a circular ring-shaped stretchable air-tight soft membrane, the two sides of the inflatable membrane 5 are respectively sealed and fixed on the left and right sides in the inner groove 31, the movable tube 2 is provided with a flow channel 17 communicating with the inner part of the inner groove 31, and the end opposite to the inner groove 31 of the flow channel 17 communicates with the inflatable structure 32. The inflatable structure 32 inflates the inner part of the inner groove 31 through the flow channel 17, and then inflates the inflatable membrane 5, so that the inflation size of the inflatable membrane 5 can be freely adjusted.

[0030] The inflatable structure 32 includes a piston needle cylinder 12 provided with an inner part communicating with the flow channel 17 at the end of the limiting seat 10 penetrated by the movable tube 2, the end opposite to the flow channel 17 of the piston needle cylinder 12 is provided with a tail cover 13, and the middle part of the tail cover 13 is threadedly connected with a push-pull rod 14. The top end of the push-pull rod 14 is connected with a handle 15, and the end of the push-pull rod 14 located in the inner part of the piston needle cylinder 12 is connected with a piston main body 16 through a bearing. The push-pull rod 14 is rotated by screwing, the accuracy of the piston main body 16 descending in the piston needle cylinder 12 is improved, and the effect of accurately controlling the inflation size of the inflatable membrane 5 is achieved.

[0031] The inflatable sleeve basket 4 includes a plurality of inflatable soft strips, the two ends of the inflatable soft strips are respectively connected to the end sides of the vane head 3 and the end sides of the guide sleeve 1, the inflatable soft strips are arranged in a ring shape side by side, and a flexible basket net is sleeved on the outer circumferential side of the inflatable soft strips. The inflatable soft strips and the flexible basket net are both metal guide wires or metal wire mesh structures and their deformation principles used in existing medical treatment, which will not be further refined.

[0032] A deformation operation method based on the double-layer deformation sleeve stone basket as described above, comprising the following:

[0033] 1) The guide sleeve 1 is inserted into the ureter with the blade head 3 as the front end. When encountering a stone obstruction, the handle 15 is manually rotated, and the handle 15 and the push-pull rod 14 move in the tail cover 13 through the thread, and then the push-pull rod 14 pushes the piston body 16 in the piston needle cylinder 12 downwards. Gas enters the inside of the inflation membrane 5 through the flow channel 17, the inflation membrane 5 inflates and swells, forming a deformation, which supports the ureter, making the gap between the inner wall of the ureter and the stone larger, thereby facilitating the front end of the blade head 3 to pass through the gap to the back side of the stone. When the front end of the blade head 3 passes through, the inflation membrane 5 deflates and shrinks, and the continuous different inflation gas volume deformation and deflation repeated operation makes the inflation blade pass through the back side of the stone in the narrow or twisted part or the desired stone removal position;

[0034] 2) When the blade head 3 and the inflation sleeve basket 4 are at the back side of the stone or the desired stone removal position, pull the movable plate 8 towards the limiting seat 10, make the limiting seat 10 move the movable tube 2 in the guide sleeve 1, and then shorten the distance between the end side of the blade head 3 and the end side of the guide sleeve 1, make the inflation soft strip swell around, drive the flexible basket to deform, form a basket with the shape of a pie or a ball, and inflate the inflation membrane 5 again, form a double-arc three-dimensional deformation, form a double-arc stone or stone removal structure by the inflation basket and the inflation membrane 5, and the operation can be changed at any position or shape, the inflation basket and the inflation membrane can form a double-arc shape with one large and one small, or a spherical arc shape with the same size, or a double-arc shape with one small and one large;

[0035] When the inflation basket and the inflation membrane form a suitable shape of a double-arc three-dimensional deformation and are located at a suitable position for stone removal, finally pull the guide sleeve 1 outward, and take out the stone from the ureter through the inflation basket and the inflation membrane 5.

[0036] During the pulling-out operation, the inflation membrane can still be deformed again according to the actual change of the urethral position or the change of the stone removal movement, which is very flexible to use.

[0037] When in use, the deformation size of the inflation membrane 5 is accurately adjusted by rotating the handle, which facilitates the blade head 3 to pass to the back of the stone, and the double-arc deformation of the inflation sleeve basket and the inflation membrane effectively improves the stone removal efficiency or the stone removal efficiency, and realizes the deformation operation in a narrow space with a small deformation structure.

[0038] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0039] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A double-arc deformable ureteral stone basket, comprising a guide sleeve (1), characterized in that, The guide sleeve (1) is slidably fitted with a movable tube (2). The movable tube (2) passes through the guide sleeve (1) and is connected to a blade head (3) at one end. The blade head (3) is provided with a sealed and inflatable expansion membrane (5) near the outer circumference of the guide sleeve (1). An expansion basket (4) is connected between the blade head (3) and the guide sleeve (1) to expand and bulge by pushing and pulling the movable tube (2). The movable tube (2) is provided with an inflation structure (32) at the end opposite to the blade head (3). The inflation structure (32) is connected to the inside of the expansion membrane (5). Insert the guide sleeve (1) into the ureter with the blade head (3) as the front end. When it encounters a stone, the expansion membrane (5) inflates and forms a deformation. The deformation supports the ureter, making the gap between the inner wall of the ureter and the stone larger. This makes it easier for the front end of the blade head (3) to pass through the gap to the back of the stone. After the front end of the blade head (3) passes through, the expansion membrane (5) deflates and contracts. Repeat the operation of different inflation and deflation to make the expansion blade pass through the back of the stone in a narrow or twisted part or the appropriate position for stone removal.

2. The ureteral double-arc deformable stone basket according to claim 1, characterized in that, The guide sleeve (1) has a tail seat (7) at one end near the inflation structure (32). Two guide rods (9) are fixedly connected to the side of the tail seat (7) opposite to the guide sleeve (1). The ends of the two guide rods (9) opposite to the tail seat (7) are fixedly connected to a limiting seat (10). A movable plate (8) can slide through the two guide rods (9). The end of the movable tube (2) passes through the middle of the movable plate (8) and the middle of the limiting seat (10) in sequence. The movable plate (8) and the movable tube (2) are fixedly connected. The movable tube (2) and the limiting seat (10) are movably connected. The end of the movable tube (2) that passes through the limiting seat (10) is connected to the inflation structure (32).

3. The ureteral double-arc deformable stone basket according to claim 2, characterized in that, A spring (11) is provided between the limiting seat (10) and the movable plate (8), and the spring (11) is sleeved on the outer periphery of the movable tube (2).

4. The ureteral double-arc deformable stone basket according to claim 2, characterized in that, The blade head (3) has an inner groove (31) on its outer circumference. The expansion membrane (5) is a circular, stretchable, airtight soft membrane. The two sides of the expansion membrane (5) are sealed and fixed to the left and right sides of the inner groove (31). The movable tube (2) has a flow groove (17) that communicates with the inside of the inner groove (31). The end of the flow groove (17) opposite to the inner groove (31) is connected to the inflation structure (32).

5. The ureteral double-arc deformable stone basket according to claim 4, characterized in that, The inflation structure (32) includes a piston syringe (12) that is connected to the flow groove (17) at the end of the movable tube (2) that passes through the limiting seat (10). The piston syringe (12) is provided with a tail cap (13) at the end opposite to the flow groove (17). A push-pull rod (14) is threadedly connected to the middle of the tail cap (13).

6. The ureteral double-arc deformable stone basket according to claim 5, characterized in that, The top of the push-pull rod (14) is connected to a handle (15), and the end of the push-pull rod (14) located inside the piston syringe (12) is connected to the piston body (16) through a bearing.

7. The ureteral double-arc deformable stone basket according to claim 6, characterized in that, The expansion basket (4) includes several expansion strips, the two ends of which are respectively connected to the end side of the blade head (3) and the end side of the guide sleeve (1). The expansion strips are arranged in a ring and side by side, and a flexible basket net is sleeved on the outer periphery of the expansion strips.

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