Calculus plugging device with double-layer plugging film

Abstract

The utility model relates to a calculus plugging device with a double-layer plugging film, and relates to the technical field of medical instruments. Comprising a holding piece, a first blocking net and a second blocking net. The first blocking net is arranged on the holding piece; the second blocking net is connected with the first blocking net, and the first blocking net and the second blocking net form a first containing space; netting wire gaps of the first blocking net are larger than netting wire gaps of the second blocking net. In the process that stone chips located in the first container are taken out of the body by an operator, the mesh gaps of the first blocking net are large so that perfusion water flow can pass through, the impact force to components is reduced, the stability of the device is improved, and large broken stone can be blocked outside the first blocking net and prevented from escaping. The gap of the second plugging net is small so that small stone chips can be prevented from flowing back into the kidney, the double-insurance design can reduce impact in the operation, meanwhile, the good plugging performance is achieved, and the problem that the plugging performance of the stone plugging device cannot be guaranteed when the stone plugging device faces the impact in the operation is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a stone occluder with a double-layer occluding membrane. Background Art

[0002] Urinary stones are one of the most common urological diseases. Stones can occur in various parts of the urinary system and are classified according to their location into kidney stones, ureteral stones, bladder stones, and urethral stones. Clinically, kidney stones and ureteral stones are the most common. Stone formation has numerous impacts on the human body, and in severe cases, can lead to renal impairment. Treatment options for urinary stones include conservative treatment, open treatment, extracorporeal shock wave lithotripsy (ESWL), percutaneous nephrolithotomy (PCNL), and ureteroscopic lithotripsy (URL). URL lithotripsy through the human body cavity offers minimally invasive and precise stone fragmentation, but it still has operational limitations: stones and stone fragments in the upper and middle ureters are easily displaced back into the renal pelvis or calyces by the instillation water flow or the recoil force of the lithotripsy tool, causing kidney stones, increasing surgical complexity, and resulting in a low intraoperative stone clearance rate.

[0003] Regarding the above-mentioned related technologies, there is a problem that the stone occluder cannot guarantee the sealing performance when facing intraoperative impact. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a stone occluder with a double-layer occluding membrane, aiming to solve the problem that the stone occluder cannot guarantee the occluding performance when facing intraoperative impact.

[0005] The present application provides a stone occluder with a double-layer occluding membrane, which adopts the following technical solution: a stone occluder with a double-layer occluding membrane, comprising:

[0006] gripping piece;

[0007] a first blocking net, arranged on the gripping member;

[0008] a second blocking net connected to the first blocking net, wherein the first blocking net and the second blocking net form a first accommodation space;

[0009] In which, the holding piece forms a second accommodating space, the second accommodating space is connected to the outside world, the first blocking net and the second blocking net can be retracted into or extended from the second accommodating space, the mesh gap of the first blocking net is larger than the mesh gap of the second blocking net, the first blocking net is used to block larger gravel from entering the first accommodating space, and the second blocking net is used to block smaller stone chips from leaving the first accommodating space.

[0010] Optionally, a guide is provided in the second accommodating space, the guide is slidably arranged along the axial direction of the holding member, one end of the guide is connected to the first blocking net, and the guide is used to retract or extend the first blocking net and the second blocking net into or out of the second accommodating space.

[0011] Optionally, the stone occluder with a double-layer occluding membrane includes a visualization guide head and a guide head connecting rod, one end of the guide head connecting rod is connected to the visualization guide head, and the other end passes through the second occluding net and the first occluding net respectively and is connected to the inner wall of the gripping member;

[0012] The first blocking net and the second blocking net are respectively slidably arranged with the guide head connecting rod, and the first blocking net and the second blocking net slide along the rod body of the guide head connecting rod in a direction close to or away from the visualization guide head.

[0013] Optionally, a first frame is provided on the first blocking net, and a plurality of first frames are provided, and the plurality of first frames are arranged to diverge in all directions with the center of the first blocking net as an endpoint;

[0014] The second blocking net is provided with a second frame, and a plurality of the second frames are provided. The plurality of second frames are arranged to diverge from the center of the second blocking net as an end point. The number of the second frames corresponds to the number of the first frames.

[0015] One end of the first frame close to the center of the first blocking net is hinged to the guide member, and the other end of each first frame is hinged to the corresponding second frame.

[0016] Optionally, a sealing gasket is provided at one end of the guide member close to the first skeleton, and the sealing gasket is used to close the second accommodating space. One end of the first skeleton close to the center of the first blocking net is hinged to the sealing gasket.

[0017] Optionally, a slide groove is provided on the gripping member, which is connected to the second accommodating space. A slider that can slide along the axial direction of the gripping member is provided in the slide groove, and the slider at least partially extends into the second accommodating space and is connected to the guide member.

[0018] Optionally, limiting ridges are provided on the side walls on both sides of the slide groove, limiting grooves are provided on both sides of the slider, and the limiting ridges and the limiting grooves are slidably arranged.

[0019] Optionally, isolation pieces are provided on both sides of the slider; the isolation pieces abut against the inner wall of the gripping piece to close the second accommodating space.

[0020] Optionally, a clamping assembly is provided on the holding member, and the clamping assembly is used to clamp or release the guiding member.

[0021] Optionally, the clamping assembly includes a first clamping member and a second clamping member, the first clamping member is arranged opposite to the second clamping member, the first clamping member is arranged in the second accommodating space, and the first clamping member abuts against the guide member;

[0022] The second clamping member is disposed in the second accommodating space, and the second clamping member moves toward or away from the guiding member.

[0023] Compared with the prior art, the embodiment of the present invention has the following advantages:

[0024] After the first sealing net and the second sealing net are sent to the stone position by the operator, and the stone is located in front of the position where the first sealing net and the second sealing net are about to open, the operator performs a lithotripsy operation, and the stone chips after crushing will fall into the first accommodating space. The second sealing net can prevent the stone chips from falling from the first accommodating space, so that the operator can take the stone chips out of the body.

[0025] Because the mesh gaps of the first blocking net are larger than those of the second blocking net, the larger mesh gaps of the first blocking net allow the perfusion water to pass through, reducing the impact on the components and increasing the stability of the device. Larger stones can be blocked outside the first blocking net to prevent escape. The smaller gaps of the second blocking net can prevent smaller stone chips from flowing back into the kidney. This double-safety design can reduce intraoperative impact while also providing good sealing performance, solving the problem of stone occluders being unable to guarantee sealing performance in the face of intraoperative impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 1 is a schematic diagram of the overall structure of the stone occluder with a double-layer occluding membrane in the embodiment of the present application in a working state;

[0028] Figure 2 This is a schematic structural diagram of the first blocking net, the second blocking net, the first frame and the second frame of the stone occluder with a double-layer blocking membrane in an embodiment of the present application;

[0029] Figure 3This is a cross-sectional view of the first blocking net, the second blocking net, the first frame, and the second frame of the stone occluder with a double-layer blocking membrane in an embodiment of the present application;

[0030] Figure 4 This is a schematic structural diagram of the first skeleton and the second skeleton of the stone occluder with a double-layer occluding membrane in an embodiment of the present application;

[0031] Figure 5 1 is a schematic structural diagram of a non-working state of a stone occluder with a double-layer occluding membrane in an embodiment of the present application;

[0032] Figure 6 This is a schematic structural diagram of a visualized guide head and a guide head connecting rod of a stone occluder with a double-layer occluding membrane in an embodiment of the present application;

[0033] Figure 7 is a cross-sectional view of a stone occluder with a double-layer occluding membrane in an embodiment of the present application;

[0034] Figure 8 Schematic diagram of the structure of the guide member and sealing gasket of the stone occluder with a double-layer occluding membrane in an embodiment of the present application;

[0035] Figure 9 Schematic diagram of the structure of the handle of the stone occluder with a double-layer occluding membrane in an embodiment of the present application;

[0036] Figure 10 yes Figure 8 Enlarged view of part A;

[0037] Figure 11 Schematic diagram of the structure of the slider of the stone occluder with a double-layer occluding membrane in an embodiment of the present application;

[0038] Figure 12 is a cross-sectional view of the handle of the stone occluder with a double-layer occluding membrane in an embodiment of the present application;

[0039] Figure 13 It is a structural schematic diagram of the clamping assembly of the stone occluder with a double-layer sealing membrane in an embodiment of the present application.

[0040] Description of reference numerals:

[0041] 1. Gripping part; 11. Inner core; 12. Handle; 121. Slide groove; 1211. Limiting convex strip; 122. Slider; 1221. Limiting groove; 1222. Isolator; 1223. Pushing concave arc; 1224. Inserting limiting hole; 13. Outer sheath; 2. First blocking net; 21. First skeleton; 3. Second blocking net; 31. Second skeleton; 4. Guide; 41. Sealing gasket; 5. Visual guide head; 6. Guide head connecting rod; 61. Guide head fixing part; 611. Inserting part; 612. Fixing part; 7. Clamping assembly; 71. First clamping part; 711. First clamping arc; 712. Fixed base; 72. Second clamping part; 721. Second clamping arc; 722. Guide slide; 723. Screw; 7231. Screw cap. DETAILED DESCRIPTION

[0042] In order to help those skilled in the art better understand the present invention, the following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] The present application is further described in detail below with reference to the accompanying drawings.

[0044] The embodiment of the present application discloses a stone occluder having a double-layer occluding membrane.

[0045] like Figure 1 As shown, a stone occluder with a double-layer sealing membrane includes a gripping member 1, a first sealing net 2 and a second sealing net 3; the first sealing net 2 is arranged on the gripping member 1; the second sealing net 3 is connected to the first sealing net 2, and the first sealing net 2 and the second sealing net 3 form a first accommodating space; wherein, the gripping member 1 forms a second accommodating space, and the second accommodating space is communicated with the outside world, the first sealing net 2 and the second sealing net 3 can be retracted into or extended from the second accommodating space, the mesh gap of the first sealing net 2 is larger than the mesh gap of the second sealing net 3, the first sealing net 2 is used to block larger gravel from entering the first accommodating space, and the second sealing net 3 is used to block smaller stone chips from leaving the first accommodating space.

[0046] After the first blocking net 2 and the second blocking net 3 are sent to the stone position by the operator, and the stone is located in front of the position where the first blocking net 2 and the second blocking net 3 are about to open, the operator performs a stone crushing operation, and the stone chips after crushing will fall into the first accommodating space. The second blocking net 3 can prevent the stone chips from falling from the first accommodating space, so that the operator can take the stone chips out of the body.

[0047] Because the mesh gaps of the first blocking net 2 are larger than those of the second blocking net 3, the larger mesh gaps of the first blocking net 2 allow the irrigation water to pass through, reducing the impact on the components and increasing the stability of the device. Larger stones can be blocked outside the first blocking net 2 to prevent them from escaping. The smaller gaps of the second blocking net 3 can prevent smaller stones from flowing back into the kidney. This double-safety design can reduce intraoperative impact while also providing good sealing performance, solving the problem of stone occluders being unable to guarantee sealing performance when faced with intraoperative impact.

[0048] like Figure 1 and Figure 7 As shown, a guide member 4 is provided in the second accommodation space, and the guide member 4 is slidably provided along the axial direction of the gripping member 1 .

[0049] Specifically, the grip 1 includes an inner core 11, a handle 12 and an outer sheath 13. The outer sheath 13 is arranged between the inner core 11 and the handle 12. The outer sheath 13 connects the inner core 11 and the handle 12 respectively. A second connecting accommodating space is formed inside the inner core 11, the handle 12 and the outer sheath 13.

[0050] The outer shape of the outer sheath tube 13 and the inner core 11 is cylindrical, and the outer shape of the handle 12 is a rectangular parallelepiped. It should be noted that the shapes of the inner core 11, the outer sheath tube 13 and the handle 12 are not limited here, that is, the outer shape of the handle 12 can also be other shapes such as cylindrical.

[0051] The cross-sectional areas of the handle 12 , the outer sheath 13 and the inner core 11 along the axial direction decrease in sequence but are all larger than the axial cross-sectional area of the second accommodating space.

[0052] The guide member 4 is a guide wire or guide rod. The guide member 4 is disposed within the second accommodation space and is coaxial with the second accommodation space. One end of the guide member 4 is located within the second accommodation space where the handle 12 is located, and the other end is located within the second accommodation space where the inner core 11 is located. The guide member 4 can slide back and forth within the second accommodation space along the axial direction of the second accommodation space.

[0053] In one implementation of this embodiment, the guide member 4 is made of memory metal.

[0054] like Figure 1 、 Figure 5 and Figure 6 As shown, the stone occluder with a double-layer sealing membrane includes a visualization guide head 5 and a guide head connecting rod 6, one end of the guide head connecting rod 6 is connected to the visualization guide head 5, and the other end passes through the second sealing net 3 and the first sealing net 2 respectively to be connected to the inner wall of the gripping member 1.

[0055] The first blocking net 2 and the second blocking net 3 are slidably arranged with the guide head connecting rod 6 , and the first blocking net 2 and the second blocking net 3 slide along the rod body of the guide head connecting rod 6 toward or away from the direction of the visual guide head 5 .

[0056] Specifically, the visualization guide head 5 is set at one end of the guide head connecting rod 6, and the other end of the guide head connecting rod 6 is provided with a guide head fixing piece 61, which is used to fix the guide head connecting rod 6 and the visualization guide head 5 at one end of the inner core 11.

[0057] The overall shape of the guide head fixing part 61 is L-shaped. The guide head fixing part 61 includes an extension part 611 and a fixing part 612. One end of the extension part 611 is vertically connected to one end of the fixing part 612. The other end of the extension part 611 is fixed to the end of the guide head connecting rod 6. The other end of the fixing part 612 extends into the second accommodating space of the inner core 11 and is fixedly connected to the inner wall of the inner core 11.

[0058] In order to improve the overall fixation stability of the guide head connecting rod 6 , at least two guide head fixing members 61 are provided, and the plurality of guide head fixing members 61 are arranged around the circumference of the end portion of the guide head connecting rod 6 .

[0059] The distance from the guide head to the inner core 11 is equal to the distance from the top of the second blocking net 3 to the inner core 11 when the first blocking net 2 and the second blocking net 3 are fully opened.

[0060] The visualization guide head 5 is made of a material with good biocompatibility, so that the visualization guide head 5 has a development function, allowing the operator to locate the guide head by observing it under the ureteroscope, thereby improving the accuracy of occlusion.

[0061] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 7 As shown, one end of the guide 4 is connected to the first blocking net 2 , and the guide 4 is used to retract the first blocking net 2 and the second blocking net 3 into or extend them out of the inner core 11 .

[0062] A first frame 21 is provided on the first blocking net 2 . There are multiple first frames 21 , and the multiple first frames 21 are radiated from the center of the first blocking net 2 as an end point.

[0063] A second skeleton 31 is provided on the second blocking net 3 . There are multiple second skeletons 31 , which are radiated from the center of the second blocking net 3 . The number of second skeletons 31 corresponds to the number of first skeletons 21 .

[0064] One end of the first skeleton 21 close to the center of the first blocking net 2 is hinged to the guide 4 , and the other end of each first skeleton 21 is hinged to the corresponding second skeleton 31 .

[0065] Specifically, the first blocking net 2 and the second blocking net 3 are both arc-shaped, the first blocking net 2 and the second blocking net 3 are concentrically arranged, and the edge of the first blocking net 2 is connected to the edge of the second blocking net 3 .

[0066] The first blocking net 2 and the second blocking net 3 have the same upward convex direction, both convexing toward the direction close to the visual guide head 5. When the first blocking net 2 and the second blocking net 3 are fully extended, the distance from the top center of the first blocking net 2 to the plane formed by the edges of the first blocking net 2 is smaller than the distance from the top center of the second blocking net 3 to the plane formed by the edges of the first blocking net 2.

[0067] The mesh gaps of the first blocking net 2 are larger than the mesh gaps of the second blocking net 3 .

[0068] It should be noted that the actual gaps between the meshes of the first blocking net 2 and the actual gaps between the meshes of the second blocking net 3 are adjusted according to the stone chip standard after crushing.

[0069] There are four first frames 21 and four second frames 31. The four first frames 21 are arranged in a radially distributed manner. When the four first frames 21 are fully extended, the four first frames 21 form a slightly concave cross shape. The slightly concave cross shape formed by the four first frames 21 projects in the opposite direction of the first blocking net 2.

[0070] Similarly, four second frames 31 are arranged to radiate outward from the center of the second blocking net 3, and the second blocking net 3 is fixed to the four second frames 31. When the four second frames 31 are fully extended, the overall shape of the four second frames 31 is a slightly concave cross. The slightly concave cross formed by the four second frames 31 protrudes in the same direction as the second blocking net 3.

[0071] One end of the first skeleton 21 close to the other first skeletons 21 is hinged to one end of the guide 4 close to the inner core 11 , and the other end of each first skeleton 21 is hinged to one end of a corresponding second skeleton 31 away from the second blocking net 3 .

[0072] The stone blocker is further provided with a hinge ring, which is sleeved on the guide head connecting rod 6 and can move back and forth along the axial direction of the guide head connecting rod 6.

[0073] One end of each second skeleton 31 close to the center of the second blocking net 3 is hinged to the hinge ring, and four second skeletons 31 are distributed around the circumference of the hinge ring.

[0074] In the non-working state, the first blocking net 2 and the second blocking net 3 are received in the second accommodating cavity where the inner core 11 is located. When work is required, the guide 4 is pushed, and the guide 4 pushes the first skeleton 21 and the second skeleton 31. The hinged ring slides toward the direction close to the guide 4, and the second blocking net 3 and the first blocking net 2 are exposed from the second accommodating cavity in turn. As the guide 4 continues to push, the hinged ring finally abuts against the guide 4. At this time, the first blocking net 2 and the second blocking net 3 are opened to the maximum state, which can protect the patient's ureter to a greater extent and reduce the escape of stone chips.

[0075] It should be noted that since the first blocking net 2 and the second blocking net 3 need to be retracted into the inner cavity, in order to achieve avoidance and prevent the guide head fixing part 61 from limiting the movement of the guide part 4 to the first frame 21 and the second frame 31, the length of the extension part 611 in the inner cavity is at least greater than or equal to the total length of the first frame 21 and the second frame 31.

[0076] like Figure 4 、 Figure 7 and Figure 8 As shown, a sealing gasket 41 is provided at one end of the guide member 4 close to the first frame 21 , and the sealing gasket 41 is used to close the second accommodation space. An end of the first frame 21 close to the center of the first blocking net 2 is hinged to the sealing gasket 41 .

[0077] Specifically, the sealing gasket 41 is circular in shape, and its diameter is equal to the diameter of the second accommodating cavity where the inner core 11 is located. A plurality of first skeletons 21 are circumferentially distributed on the sealing gasket 41 and hinged to the sealing gasket 41 .

[0078] The sealing gasket 41 is further provided with an avoidance hole, and the extending portion 611 is passed through the avoidance hole, and the avoidance hole is used to avoid the extending portion 611.

[0079] The number of the avoidance holes is set corresponding to the number of the extending portions 611 .

[0080] It should be noted that the diameter of the circle surrounded by the plurality of avoidance holes is greater than the diameter of the circle surrounded by the plurality of hinge points between the first frames 21 and the sealing gasket 41 .

[0081] The provision of the sealing gasket 41 isolates the second accommodating space from the outside, thereby improving the sealing performance of the second accommodating space and preventing various foreign objects from entering the second accommodating space during operation of the stone occluder, thereby affecting the service life of the stone occluder.

[0082] like Figure 1 、 Figure 9 and Figure 10As shown, a slide groove 121 is provided on the gripping member 1, and the slide groove 121 is connected to the second accommodating space. A slider 122 that can slide along the axial direction of the gripping member 1 is provided in the slide groove 121, and the slider 122 at least partially extends into the second accommodating space and is connected to the guide member 4.

[0083] Specifically, the sliding groove 121 is in the shape of a strip groove. The sliding groove 121 is provided on the handle 12 , and the length direction of the strip groove extends along the axial direction of the handle 12 .

[0084] The slider 122 is slidably arranged on the strip groove, and the portion of the slider extending into the second accommodating space is provided with a penetration limit hole 1224, through which the guide member 4 passes. The penetration limit hole 1224 is coaxially arranged with the guide member 4, and the guide member 4 is fixed in the penetration limit hole 1224. The provision of the penetration limit hole 1224 is used, on the one hand, to avoid the guide member 4 from being affected by the setting of the slider 122 and the movement of the guide member 4 in the second accommodating space. On the other hand, the provision of the penetration limit hole 1224 can limit the guide member 4, preventing the guide member 4 from being limited or bent during movement, thereby affecting the opening or closing of the first blocking net 2 and the second blocking net 3, thereby improving the stability of the guide member 4 during movement.

[0085] The outer portion of the slider 122 is provided with a push-concave arc 1223. This arc is located on the top surface of the slider 122, facing away from the inner core 11. The push-concave arc 1223 is a curved arc. When the first and second blocking nets 2, 3 need to be pushed out of the inner core 11, the user can press the push-concave arc 1223 with their thumb. The curvature of the push-concave arc 1223 fits the user's finger, making it easier for the user to push the slider 122.

[0086] like Figure 10 As shown, limiting ridges 1211 are provided on the side walls on both sides of the slide groove 121 , and limiting grooves 1221 are provided on both sides of the slider 122 , and the limiting ridges 1211 and the limiting grooves 1221 are slidably arranged.

[0087] Specifically, two limiting ridges 1211 are provided. The two limiting ridges 1211 are respectively provided on the side walls of the sliding groove 121 on both sides along the axial direction of the handle 12 , and the two limiting ridges 1211 are provided opposite to each other.

[0088] The side walls on both sides of the slide groove 121 are respectively provided with limiting grooves 1221 that slide with the limiting protrusion 1211. The limiting grooves 1221 are engaged with the limiting protrusion 1211 to push the slider 122. The slider 122 can slide back and forth along the sliding protrusion on the slide groove 121 along the axial direction of the handle 12.

[0089] The setting of the limiting groove 1221 and the limiting ridge 1211 limits the slider 122 so that the slider 122 can only move back and forth in a straight line, thereby preventing the slider 122 from shaking during the movement in the slide groove 121 and improving the stability of the installation of the slider 122.

[0090] like Figure 10 and Figure 11 As shown, the side walls of the slider 122 on both sides along the radial direction of the handle 12 are respectively provided with isolation members 1222 ; the upper surface of the isolation member 1222 abuts against the inner wall of the handle 12 , and the isolation member 1222 is used to close the second accommodation space.

[0091] The isolation member 1222 is plate-shaped, the surface area of each isolation member 1222 is greater than or equal to the size of the slide groove 121, and the length of each isolation member 1222 along the axial direction of the handle 12 is greater than or equal to the length of the slide groove 121 along the axial direction of the handle 12.

[0092] When the slider 122 slides in the slide groove 121, the isolation pieces 1222 on both sides of the slider 122 can always block the gaps on the slide groove 121 that are not blocked by the slider 122, thereby ensuring that the second accommodation space where the handle 12 is located remains isolated from the outside world, preventing external impurities or dust from entering the second accommodation space.

[0093] like Figure 12 and Figure 13 As shown, a clamping assembly 7 is provided on the gripping member 1 , and the clamping assembly 7 is used to clamp or release the guiding member 4 .

[0094] Specifically, the clamping assembly 7 is set on the handle 12, and the clamping assembly 7 can control the position of the guide 4 in the second accommodating cavity. When it is not working, the guide 4 is clamped by the clamping assembly 7. At this time, the first blocking net 2 and the second blocking net 3 are confined in the second accommodating space where the inner core 11 is located.

[0095] When work is required, the clamping assembly 7 is controlled to loosen the guide 4 and push the slider 122. The guide 4 pushes the first blocking net 2 and the second blocking net 3 out of the inner core 11. As the slider 122 continues to push, the first blocking net 2 and the second blocking net 3 are opened to a greater extent until the first blocking net 2 and the second blocking net 3 are opened to the maximum extent.

[0096] In the process of the slider 122 pushing the first blocking net 2 and the second blocking net 3 to continuously expand their opening degree, the user can freely control the opening degree of the first blocking net 2 and the second blocking net 3 according to actual conditions. When the opening degree of the first blocking net 2 and the second blocking net 3 reaches the degree required for treatment, the clamping assembly 7 is controlled to clamp the guide 4. At this time, the guide 4 will not be able to be pushed, so that the first blocking net 2 and the second blocking net 3 will maintain the current opening state for treatment.

[0097] Controlling the opening and closing degree of the first blocking net 2 and the second blocking net 3 by the clamping assembly 7 can protect the patient's ureter to a greater extent and reduce the escape of stone chips.

[0098] The clamping assembly 7 includes a first clamping member 71 and a second clamping member 72 . The first clamping member 71 and the second clamping member 72 are arranged opposite to each other. The first clamping member 71 is arranged in the second accommodating space where the handle 12 is located, and the first clamping member 71 abuts against the guide member 4 .

[0099] The second clamping member 72 is disposed in the second accommodation space where the handle 12 is located, and the second clamping member 72 moves toward or away from the guide member 4 .

[0100] Specifically, the clamping assembly 7 is disposed on the handle 12 and is disposed away from the inner core 11 relative to the slide groove 121. The first clamping member 71 and the second clamping member 72 are located in the second accommodating space where the handle 12 is located. The first clamping member 71 and the second clamping member 72 are respectively disposed on two opposing inner walls of the handle 12, and the first clamping member 71 and the second clamping member 72 are disposed opposite each other.

[0101] The first clamping member 71 includes a first clamping arch 711 and a fixing base 712. The first clamping arch 711 is fixed to one end of the fixing base 712, and the other end of the fixing base 712 is fixed to the inner wall of the handle 12. The diameter of the first clamping arch 711 is the same as the diameter of the guide member 4, and the first clamping arch 711 abuts against the outer surface of the guide member 4.

[0102] The second clamping member 72 includes a second clamping arch 721, a guide slide 722, and a lead screw 723. One end of the lead screw 723 is disposed on the second clamping arch 721. The guide slide 722 is slidably disposed on the second clamping arch 721 and is disposed parallel to the lead screw 723. Two guide slides 722 are provided, and the two guide slides 722 are disposed on either side of the lead screw 723.

[0103] One end of the two guide slide rods 722 facing away from the second clamping arc 721 is respectively fixed on the inner wall of the handle 12, the rod body of the screw 723 is screwed to the inner wall of the handle 12, and one end of the screw 723 facing away from the second clamping arc 721 extends from the inner wall of the handle 12 to the outside, and the end of the screw 723 close to the second clamping arc 721 is set on the second clamping arc 721 through a bearing.

[0104] The first clamping arc 711 and the second clamping arc 721 are arranged opposite to each other. The diameter of the second clamping arc 721 is the same as the diameter of the guide member 4 . The second clamping arc 721 is used to abut against the surface of the guide member 4 .

[0105] The first clamping arc 711 is always in contact with the guide member 4. When the stone blocker is not working, the second clamping arc 721 also remains in contact with the guide member 4. At this time, the first clamping arc 711 and the second clamping arc 721 are respectively in contact with the two sides of the guide member 4. The guide member 4 is in a clamping state and cannot be pushed.

[0106] When the stone blocker needs to work, the lead screw 723 is rotated in the outside world. Due to the action of the bearing, the second clamping arc 721 will make a linear motion away from the guide member 4 along the guide slide rod 722. At this time, the second clamping arc 721 is no longer in contact with the guide member 4, and the guide member 4 is no longer clamped. The slider 122 can be pushed to move the guide member 4 to push the first blocking net 2 and the second blocking net 3 to the outside world to open and collect stone chips.

[0107] After the opening and closing degree of the first blocking net 2 and the second blocking net 3 is determined, the screw 723 is rotated in the opposite direction again, and the second clamping arc 721 makes a linear motion close to the guide member 4 and finally abuts against the guide member 4, so that the guide member 4 is clamped again and cannot be pushed, and the opening and closing degree of the first blocking net 2 and the second blocking net 3 is fixed.

[0108] The end of the lead screw 723 extending outward is provided with a screw cap 7231, which is shaped like a bullet head, and the cross-sectional area of the cylindrical portion of the screw cap 7231 is larger than the cross-sectional area of the lead screw 723. The provision of the screw cap 7231 makes it convenient for the operator to screw the lead screw 723, facilitating the screwing operation.

[0109] The overall implementation process of the technical solution of this application is as follows:

[0110] When the stone occluder needs to be used, the operator holds the handle 12 to insert the outer sheath 13 and the inner core 11 into the operating hole of the ureteroscope. Under the observation of the ureteroscope, after the visualization guide head 5 reaches the back of the stone, the operator first rotates the screw 723 so that the second clamping member 72 no longer abuts the guide member 4, so that the guide member 4 is no longer clamped by the clamping assembly 7, and then pushes the slider 122 to make the guide member 4 slide in the second accommodating cavity to push the first blocking net 2 and the second blocking net 3 out of the inner core 11.

[0111] When the hinged ring contacts the visual guide head 5 and continues to push the guide member 4, the first blocking net 2 and the second blocking net 3 are gradually opened.

[0112] When the first blocking net 2 and the second blocking net 3 are opened to a suitable size, the screw 723 is screwed in the reverse direction so that the second clamping member 72 abuts against the guide member 4 again, and the guide member 4 is clamped by the clamping assembly 7 again, thereby fixing the opened state of the first blocking net 2 and the second blocking net 3.

[0113] The operator can then perform a stone crushing operation, and the stone chips after crushing remain in the first accommodating space. The operator can now choose to disengage the guide 4 from the clamping of the clamping assembly 7 again and push the slider 122 in the opposite direction, so that the first sealing net 2 and the second sealing net 3 are reduced and opened, so as to bring the stone chips out of the body.

[0114] The above operation can effectively seal the stones and remove the blocked stone chips from the patient's body. The first and second sealing nets 2 and 3 are set with different gaps. The first sealing net 2 with a larger gap allows the irrigation water to flow through, reducing the impact on the components and increasing the stability of the device. Larger stones can be blocked outside the first sealing net 2 to prevent them from escaping. The second sealing net 3 with a smaller gap can prevent smaller stone chips from flowing back into the kidney. This double-safety design can reduce intraoperative impact while also providing good sealing performance.

[0115] To sum up, a stone blocker with a double-layer sealing membrane includes a gripping member 1, a first sealing net 2 and a second sealing net 3; the first sealing net 2 is arranged on the gripping member 1; the second sealing net 3 is connected to the first sealing net 2, and the first sealing net 2 and the second sealing net 3 form a first accommodating space; wherein, the gripping member 1 forms a second accommodating space, and the second accommodating space is connected to the outside world, the first sealing net 2 and the second sealing net 3 can be retracted into or extended from the second accommodating space, the mesh gap of the first sealing net 2 is larger than the mesh gap of the second sealing net 3, the first sealing net 2 is used to block larger gravel from entering the first accommodating space, and the second sealing net 3 is used to block smaller stone chips from leaving the first accommodating space.

[0116] After the first blocking net 2 and the second blocking net 3 are sent to the stone position by the operator, and the stone is located in front of the position where the first blocking net 2 and the second blocking net 3 are about to open, the operator performs a stone crushing operation, and the stone chips after crushing will fall into the first accommodating space. The second blocking net 3 can prevent the stone chips from falling from the first accommodating space, so that the operator can take the stone chips out of the body.

[0117] Because the mesh gaps of the first blocking net 2 are larger than those of the second blocking net 3, the larger mesh gaps of the first blocking net 2 allow the irrigation water to pass through, reducing the impact on the components and increasing the stability of the device. Larger stones can be blocked outside the first blocking net 2 to prevent them from escaping. The smaller gaps of the second blocking net 3 can prevent smaller stones from flowing back into the kidney. This double-safety design can reduce intraoperative impact while also providing good sealing performance, solving the problem of stone occluders being unable to guarantee sealing performance when faced with intraoperative impact.

[0118] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0119] It should be noted that the present invention uses a stone occluder with a double-layer sealing membrane as an example to introduce the specific structure and working principle of the present invention, but the application of the present invention is not limited to a stone occluder with a double-layer sealing membrane, and can also be applied to the production and use of other similar workpieces.

[0120] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stone occluder with a double-layer occluding membrane, characterized in that: include: gripping piece; a first blocking net, arranged on the gripping member; a second blocking net connected to the first blocking net, wherein the first blocking net and the second blocking net form a first accommodation space; In which, the holding piece forms a second accommodating space, the second accommodating space is connected to the outside world, the first blocking net and the second blocking net can be retracted into or extended from the second accommodating space, the mesh gap of the first blocking net is larger than the mesh gap of the second blocking net, the first blocking net is used to block larger gravel from entering the first accommodating space, and the second blocking net is used to block smaller stone chips from leaving the first accommodating space.

2. The stone occluder with a double-layer occluding membrane according to claim 1, characterized in that: A guide is provided in the second accommodating space. The guide is slidably arranged along the axial direction of the gripping member. One end of the guide is connected to the first blocking net. The guide is used to receive or extend the first blocking net and the second blocking net into or out of the second accommodating space.

3. The stone occluder with a double-layer occluding membrane according to claim 2, characterized in that: The stone occluder with a double-layer occluding membrane comprises a visualization guide head and a guide head connecting rod, one end of the guide head connecting rod is connected to the visualization guide head, and the other end passes through the second occluding net and the first occluding net respectively and is connected to the inner wall of the gripping member; The first blocking net and the second blocking net are respectively slidably arranged with the guide head connecting rod, and the first blocking net and the second blocking net slide along the rod body of the guide head connecting rod in a direction close to or away from the visualization guide head.

4. The stone occluder with a double-layer occluding membrane according to claim 3, characterized in that: The first blocking net is provided with a first frame, and the first frame is provided in plurality, and the plurality of first frames are arranged to diverge in all directions with the center of the first blocking net as an endpoint; The second blocking net is provided with a second frame, and a plurality of the second frames are provided. The plurality of second frames are arranged to diverge from the center of the second blocking net as an end point. The number of the second frames corresponds to the number of the first frames. One end of the first frame close to the center of the first blocking net is hinged to the guide member, and the other end of each first frame is hinged to the corresponding second frame.

5. The stone occluder with a double-layer occluding membrane according to claim 4, characterized in that: A sealing gasket is provided at one end of the guide member close to the first frame, and the sealing gasket is used to close the second accommodating space. An end of the first frame close to the center of the first blocking net is hinged to the sealing gasket.

6. The stone occluder with a double-layer occluding membrane according to claim 2, characterized in that: The gripping member is provided with a slide groove, which is connected to the second accommodating space. A slider which can slide along the axial direction of the gripping member is provided in the slide groove. The slider at least partially extends into the second accommodating space and is connected to the guide member.

7. The stone occluder with a double-layer occluding membrane according to claim 6, characterized in that: Limiting convex strips are provided on the side walls on both sides of the sliding groove, and limiting grooves are provided on both sides of the sliding block. The limiting convex strips and the limiting grooves are slidably arranged.

8. The stone occluder with a double-layer occluding membrane according to claim 6, characterized in that: Isolators are provided on both sides of the slider; the isolators abut against the inner wall of the gripping member to close the second accommodating space.

9. The stone occluder with a double-layer occluding membrane according to claim 6, characterized in that: The holding member is provided with a clamping assembly, and the clamping assembly is used to clamp or release the guiding member.

10. The stone occluder with a double-layer occluding membrane according to claim 9, characterized in that: The clamping assembly includes a first clamping member and a second clamping member, the first clamping member is arranged opposite to the second clamping member, the first clamping member is arranged in the second accommodating space, and the first clamping member abuts against the guide member; The second clamping member is disposed in the second accommodating space, and the second clamping member moves toward or away from the guiding member.

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