Ureter plugging device
By designing a ureter occluder containing a memory metal filament sealing assembly, the problem of difficulty in using the occluder and the guidewire in the prior art is solved, effective occlusion of stones and stable guidance of the ureteroscope are achieved, and surgical risks are reduced.
Patent Information
- Application Number
- CN202421290311.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-06
AI Technical Summary
In ureteroscopic laser lithotripsy surgery, it is difficult for the prior art to use occluder and guidewire at the same time, resulting in repeated in and out of the operation, increasing the risk of ureteral damage and infection.
A ureter occluder including a sealing assembly and a guide wire is designed. The sealing assembly is composed of a memory metal filament. The sliding of the guide wire makes the sealing member open or close during use of the guide wire to achieve simultaneous use of the sealing and guidance.
By using the simultaneous use of the sealing assembly and guidewire, repeated operations during the operation are reduced, the risk of ureteral injury and infection is reduced, and the safety and efficiency of the operation are improved.
Smart Images
Figure CN222657113U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of medical devices, and in particular to a ureteral occluder. Background Art
[0002] Ureteroscopic laser lithotripsy is a surgical intervention method for treating ureteral stones. During the operation, not only a guide wire is needed to guide the ureteroscope in and out of the ureter, but also an occluder is needed to block the stones in the middle and upper ureter to prevent them from drifting.
[0003] Due to the narrow working environment of the ureteroscope, when the stone blocker is placed, it is necessary to use other structures to expand the stone blocker to achieve the blockage of the stone, so the guide wire needs to be withdrawn, which makes it impossible to guide the ureteroscope; when the stone is crushed, the blocker is retracted, and the guide wire is re-placed to guide the ureteroscope. In other words, due to the limited ureteral channel, the blocker and the guide wire cannot be used at the same time. During the above operation, the blocker and the guide wire need to be repeatedly inserted and removed, which can easily cause ureteral damage and increase the risk of infection during the operation.
[0004] Therefore, the present application studies a ureteral occluder in which an occlusion component and a guide wire can be used simultaneously, so as to reduce the risk of surgery. Utility Model Content
[0005] In order to reduce the risk of surgery, the present application provides a ureteral occluder.
[0006] The present application provides a ureteral occluder, which adopts the following technical solution:
[0007] A ureteral occluder, comprising an occluding assembly and a guide wire, the occluding assembly comprising an occluding piece and a connecting piece, the occluding piece being formed by a plurality of memory metal filaments spaced apart and enclosed, the connecting piece comprising a first connecting piece and a second connecting piece, the two ends of the occluding piece being respectively connected to the first connecting piece and the second connecting piece, the guide wire sequentially passing through the first connecting piece, the occluding piece and the second connecting piece, and extending out of the connecting pieces on both sides of the occluding piece;
[0008] During the first state change, the first connecting member slides relative to the guide wire toward the second connecting member, the second connecting member is stationary relative to the guide wire, the first connecting member drives one end of the blocking member to move toward the second connecting member, and the memory metal filaments are all stretched away from the guide wire to form a three-dimensional mesh structure;
[0009] During the second state change, the first connecting member slides relative to the guide wire in a direction away from the second connecting member, and the second connecting member remains stationary relative to the guide wire, driving the blocking member to move away from the second connecting member, and the memory metal filaments all approach each other in the direction of the guide wire.
[0010] By adopting the above technical solution, the blocking component is used to block the stones, the guide wire is used to guide the ureteroscope, the blocking piece and the guide wire form a whole, and the blocking piece can be expanded or closed during the use of the guide wire, so as to achieve the blocking of the stones; because the blocking piece can be expanded by the guide wire, the guide wire can also be used to guide the ureteroscope during the expansion and use of the blocking piece, so that the blocking component and the guide wire can be used at the same time, and the blocking component and the guide wire do not need to be repeatedly entered and exited, thereby reducing the risk of surgery.
[0011] Optionally, the second connecting member and the guide wire are interference fit.
[0012] By adopting the above technical solution, the first connecting part is pushed, so that the first connecting part can slide and move toward the second connecting part to expand the blocking part. This is because the second connecting part and the guide wire have an interference fit, resulting in a large friction force, and the force pushing the blocking part is smaller than the friction force between the second connecting part and the guide wire. During the expansion of the blocking part, that is, in the first state, the second connecting part can always remain relatively still with the guide wire.
[0013] Optionally, a fixing member is further included, and the first connecting member is provided with a fixing hole, and the fixing hole passes through the wall of the first connecting member. When the first connecting member and the guide wire need to be fixed, the fixing member is inserted into the fixing hole and connected to the guide wire.
[0014] By adopting the above technical solution, the guide wire and the first connecting member can be easily fixed by the fixing member, so that when the blocking member is completed in the first state, the guide wire and the first connecting member can be fixed, thereby better avoiding the blocking member from tending to the second state due to force and the like.
[0015] Optionally, the fixing member includes a fixing portion and a limiting portion, the fixing portion is provided with a snap-in hole and an insertion port, the fixing member is inserted into the fixing hole, the guide wire enters into the snap-in hole along the insertion port and snaps into the fixing portion, and the limiting portion is connected to the wall surface of the first connecting member.
[0016] By adopting the above technical solution, during the process of inserting the fixing member into the first connecting member, the guide wire enters into the clamping hole along the insertion opening, so that the guide wire and the first connecting member can be conveniently fixed.
[0017] Optionally, the outer diameter of the fixing portion is smaller than the outer diameter of the limiting portion, the fixing hole is divided into a first fixing section and a second fixing section, the fixing portion is interference fit with the first fixing section, and the limiting portion is interference fit with the second fixing section.
[0018] By adopting the above technical solution, the insertion depth of the fixing member can be limited, so that the guide wire can be better fixed. At the same time, the interference fit method can make the connection between the fixing member and the first connecting member more stably, so that the guide wire can be fixed more stably.
[0019] Optionally, after the fixing piece is inserted into the fixing hole, a portion of the fixing piece extends out of the fixing hole.
[0020] By adopting the above technical solution, the fixing piece can be conveniently inserted or removed.
[0021] Optionally, the guide wire is interference fit with the fixing member in the clamping hole.
[0022] By adopting the above technical solution, the guide wire can be fixed more stably.
[0023] Optionally, the opening width of the insertion port is smaller than the opening diameter of the clamping hole.
[0024] By adopting the above technical solution, after the guide wire enters into the clamping hole and is fixed, the guide wire can be better limited so that the guide wire can be fixed more stably.
[0025] Optionally, the insertion opening gradually decreases from an opening away from the clamping hole to an opening close to the clamping hole.
[0026] By adopting the above technical solution, a better guiding effect can be formed for the guide wire to enter the clamping hole.
[0027] Optionally, a wall surface of the fixing portion corresponding to the insertion opening is in an arc structure.
[0028] By adopting the above technical solution, the guide wire can be better guided.
[0029] In summary, the present application includes at least one of the following beneficial technical effects:
[0030] 1. The blocking component is used to block stones, and the guide wire is used to guide the ureteroscope. The blocking component and the guide wire form a whole. During the use of the guide wire, the blocking component can also be expanded or closed to achieve the blocking of stones. Since the blocking component can be expanded by the guide wire, the guide wire can also be used to guide the ureteroscope during the expansion and use of the blocking component, so that the blocking component and the guide wire can be used at the same time, and the blocking component and the guide wire do not need to be repeatedly inserted and removed, thereby reducing the risk of surgery;
[0031] 2. Pushing the first connecting piece can make the first connecting piece slide and move toward the second connecting piece to open the blocking piece. This is because the second connecting piece and the guide wire have an interference fit and the friction force is relatively large. The force pushing the blocking piece is smaller than the friction force between the second connecting piece and the guide wire. In the process of opening the blocking piece, that is, in the first state, the second connecting piece can always remain relatively still with the guide wire.
[0032] 3. The guide wire and the first connecting member can be conveniently fixed by the fixing member, so that when the blocking member is in the first state, the guide wire and the first connecting member can be fixed, thereby better preventing the blocking member from tending to the second state due to force and the like. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 is a schematic structural diagram of the ureteral occluder according to an embodiment of the present application when it is in a first state;
[0034] Figure 2 is a schematic structural diagram of the ureteral occluder according to an embodiment of the present application when it is in a second state;
[0035] Figure 3 is a cross-sectional schematic diagram showing the cooperation between the first connecting member and the fixing member in the ureteral occluder of the embodiment of the present application;
[0036] Figure 4 It is a cross-sectional schematic diagram showing the cooperation between the fixing member and the guide wire in the ureteral occluder according to the embodiment of the present application.
[0037] Figure numerals: 1. Sealing component; 11. Sealing member; 12. Connecting member; 121. First connecting member; 122. Second connecting member; 2. Guide wire; 3. Fixing member; 31. Fixing portion; 32. Limiting portion; 4. Fixing hole; 41. First fixing section; 42. Second fixing section; 5. Clamping hole; 6. Insertion port. DETAILED DESCRIPTION
[0038] The following is combined with Figure 1-4 This application is described in further detail.
[0039] The present application embodiment discloses a ureteral occluder. Figure 1The ureteral occluder includes an occluding component 1 and a guide wire 2. The occluding component 1 is used to occlude stones, and the guide wire 2 is used to guide the ureteroscope. The occluding component 1 includes an occluding piece 11 and a connecting piece 12. The occluding piece 11 is used to occlude the part of the stone, and the connecting piece 12 is used to connect with the guide wire 2, so that the occluding piece 11 and the guide wire 2 can be used simultaneously during the operation. The operation is simple, and the problem of ureteral damage caused by repeated replacement of the occluding piece 11 and the guide wire 2 in the prior art can be overcome. It can also better avoid the problem of losing the ureteral channel and stone drifting as much as possible, and reduce the risks of surgical infection and failure.
[0040] The plugging member 11 is formed by a plurality of memory metal filaments spaced apart, and the connecting member 12 includes a first connecting member 121 and a second connecting member 122. In this embodiment, the first connecting member 121 and the second connecting member 122 are tubular structures and are both made of silicone. The two ends of the plugging member 11 are respectively connected to the first connecting member 121 and the second connecting member 122. In this embodiment, the two ends of the plugging member 11 are first fixed and then fixed to the first connecting member 121 and the second connecting member 122. For example, they can be fixed first by a fixing ring such as a metal ring, and then fixed by a clamping connection between the metal ring and the first connecting member 121 and the second connecting member 122.
[0041] The guide wire 2 sequentially passes through the first connecting piece 121, the blocking piece 11 and the second connecting piece 122, and extends out of the connecting pieces 12 on both sides of the blocking piece 11; during the first state change process, the first connecting piece 121 slides toward the second connecting piece 122 relative to the guide wire 2, and the second connecting piece 122 is stationary relative to the guide wire 2. The first connecting piece 121 drives one end of the blocking piece 11 to move toward the second connecting piece 122, and the memory metal filaments are all expanded in the direction away from the guide wire 2 to form a three-dimensional network structure, which is the first state; the three-dimensional network structure of this embodiment is shaped like a lantern after being expanded.
[0042] Reference Figure 2 During the change to the second state, the first connecting member 121 slides relative to the guide wire 2 in a direction away from the second connecting member 122, and the second connecting member 122 is stationary relative to the guide wire 2, driving the blocking member 11 to move in a direction away from the second connecting member 122, and the memory metal filaments all approach each other in the direction of the guide wire 2, which is the second state. After the memory metal filaments in this embodiment approach each other, the memory metal filaments are parallel to each other.
[0043] In some embodiments, the second connector 122 is interference fit with the guide wire 2, so that the second connector 122 and the guide wire 2 are temporarily fixed, and the first connector 121 is pushed within the friction force range to open the blocking member 11. The second connector 122 and the guide wire 2 are relatively stationary, and the opening action of the blocking member 11 can be realized; when the guide wire 2 needs to be replaced or the extension length of the guide wire 2 needs to be changed, it can be realized by simply pulling out the guide wire 2 with force.
[0044] Reference Figure 3 In some embodiments, the ureteral occluder further includes a fixing member 3. In this embodiment, a gap is left between the first connector 121 and the guide wire 2, so that the first connector 121 can push or stretch the occluder. The overall shape of the fixing member 3 is a cylindrical structure. In other embodiments, other structures such as a square structure can be used. The fixing member 3 is used to fix the first connector 121 and the guide wire 2, so that when the connector 12 does not need to slide, the guide wire 2 can be fixed by the fixing member 3. For example, after the occluding member 11 is opened, the first connector 121 and the guide wire 2 are fixed by the fixing member 3, so that the occluding member 11 tends to return to its original state as much as possible, so that the expanded state is maintained more stably to block the stone. The first connector 121 is provided with a fixing hole 4, and the fixing hole 4 runs through the wall of the first connector 121. When the first connector 121 and the guide wire 2 need to be fixed, the fixing member 3 is inserted into the fixing hole 4 and connected to the guide wire 2. It makes it possible to conveniently fix the guide wire 2 to the first connector 121.
[0045] Reference Figure 3 and Figure 4 In some embodiments, the fixing member 3 includes a fixing portion 31 and a limiting portion 32. The fixing portion 31 is provided with a mutually interpenetrating snap-in hole 5 and an insertion port 6. The fixing member 3 is inserted into the fixing hole 4. The guide wire 2 enters the snap-in hole 5 along the insertion port 6 and snaps with the fixing portion 31. The limiting portion 32 is connected to the wall surface of the first connecting member 121. This makes it possible to conveniently fix the guide wire 2. In some embodiments, the guide wire 2 is interference-fitted with the fixing member 3 in the snap-in hole 5. In this embodiment, the guide wire 2 is interference-fitted with the wall surface of the fixing portion 31 corresponding to the snap-in hole 5. Since the fixing member 3 is made of silicone, it is only necessary to make the opening diameter of the snap-in hole 5 slightly smaller than the outer diameter of the guide wire 2 to achieve interference fit of the guide wire 2, so that the guide wire 2 can be fixed more stably.
[0046] Refer again Figure 3 In some embodiments, the outer diameter of the fixing portion 31 is smaller than the outer diameter of the limiting portion 32, the fixing hole 4 is divided into a first fixing section 41 and a second fixing section 42, the fixing portion 31 is interference fit with the first fixing section 41, and the limiting portion 32 is interference fit with the second fixing section 42. The outer diameter of the fixing portion 31 is smaller than the outer diameter of the limiting portion 32, so that the insertion depth of the fixing member 3 can be limited, and at the same time, the fixing member 3 and the first connecting member 121 can be more stably connected through interference fit, so that the guide wire 2 can be more stably fixed.
[0047] In some embodiments, after the fixing member 3 is inserted into the fixing hole 4, the fixing member 3 partially extends out of the fixing hole 4. In this embodiment, the limiting portion 32 partially extends out of the second fixing section 42 away from the first fixing section 41, so that the fixing member 3 can be easily operated.
[0048] Reference Figure 4 In some embodiments, the width of the insertion port 6 is smaller than the diameter of the clamping hole 5. Since the fixing member 3 is made of silicone material and has the ability to deform, when the guide wire 2 is inserted, the silicone material is squeezed, so that it can be inserted into the clamping hole 5 along the insertion port 6, so that after the guide wire 2 is inserted, it can better prevent the guide wire 2 from falling out.
[0049] In some embodiments, the insertion opening 6 gradually decreases from the opening away from the clamping hole 5 to the opening close to the clamping hole 5 , so as to guide the guide wire 2 to enter along the insertion opening 6 .
[0050] In some embodiments, the wall surface of the fixing portion 31 corresponding to the insertion port 6 is an arc structure, so that the guide wire 2 can slide into the clamping hole 5 better along the arc, thus providing a better guide for the guide wire 2 to enter the clamping hole 5.
[0051] In other embodiments, the second connecting member 122 can also be fixed to the guide wire 2 by using the fixing member 3, so that when the guide wire 2 needs to be adjusted, the fixing member 3 can be pulled out to adjust the guide wire, and the fixing member 3 can be inserted to fix the guide wire 2 and the second connecting member 122, thereby realizing the expansion or closing (i.e., parallel state) of the blocking member 11.
[0052] In other embodiments, the guide wire 2 can also be fixed by the friction between it and the first connecting member 121. As long as the inner diameter of the first connecting member 121 is consistent with the outer diameter of the guide wire 2, friction can be generated between the guide wire 2 and the first connecting member 121. Since the friction is only generated by contact, the friction is very small. At this time, the first connecting member 121 can also be slid under the action of the thrust to expand the blocking member 11.
[0053] The implementation principle of a ureteral occluder in an embodiment of the present application is as follows: the occluding component 1 is used to occlude stones, the guide wire 2 is used to guide the ureteroscope, the occluding part 11 and the guide wire 2 form a whole, and during the use of the guide wire 2, the occluding part 11 can also be expanded or closed to achieve the occlusion of stones; because the occluding part 11 can be expanded by the guide wire 2, the guide wire 2 can also be used to guide the ureteroscope during the expansion and use of the occluding part 11, so that the occluding component 1 and the guide wire 2 can be used at the same time to reduce the surgical risk.
[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A ureteral occluder, characterized in that: The device comprises a blocking component and a guide wire, wherein the blocking component comprises a blocking piece and a connecting piece, wherein the blocking piece is formed by a plurality of memory metal filaments spaced apart from each other, wherein the connecting piece comprises a first connecting piece and a second connecting piece, wherein two ends of the blocking piece are respectively connected to the first connecting piece and the second connecting piece, and wherein the guide wire sequentially penetrates the first connecting piece, the blocking piece and the second connecting piece, and extends out of the connecting pieces on both sides of the blocking piece; During the first state change, the first connecting member slides relative to the guide wire toward the second connecting member, the second connecting member is stationary relative to the guide wire, the first connecting member drives one end of the blocking member to move toward the second connecting member, and the memory metal filaments are all stretched away from the guide wire to form a three-dimensional mesh structure; During the second state change, the first connecting member slides relative to the guide wire in a direction away from the second connecting member, and the second connecting member remains stationary relative to the guide wire, driving the blocking member to move away from the second connecting member, and the memory metal filaments all approach each other in the direction of the guide wire.
2. A ureteral occluder according to claim 1, characterized in that: The second connecting member and the guide wire are interference fit.
3. The ureteral occluder according to claim 1, characterized in that: It also includes a fixing piece. The first connecting piece is provided with a fixing hole. The fixing hole passes through the wall of the first connecting piece. When the first connecting piece and the guide wire need to be fixed, the fixing piece is inserted into the fixing hole and connected with the guide wire.
4. A ureteral occluder according to claim 3, characterized in that: The fixing member includes a fixing portion and a limiting portion, the fixing portion is provided with a snap-in hole and an insertion port, the fixing member is inserted into the fixing hole, the guide wire enters into the snap-in hole along the insertion port and snaps into the fixing portion, and the limiting portion is connected to the wall surface of the first connecting member.
5. A ureteral occluder according to claim 4, characterized in that: The outer diameter of the fixing portion is smaller than the outer diameter of the limiting portion, the fixing hole is divided into a first fixing section and a second fixing section, the fixing portion is interference fit with the first fixing section, and the limiting portion is interference fit with the second fixing section.
6. The ureteral occluder according to claim 4, characterized in that: The guide wire is interference-fitted with the fixing member in the clamping hole.
7. The ureteral occluder according to claim 4, characterized in that: The opening width of the insertion port is smaller than the opening diameter of the clamping hole.
8. The ureteral occluder according to claim 4, characterized in that: The insertion opening gradually decreases along an opening away from the clamping hole to a side close to the clamping hole.
9. The ureteral occluder according to claim 4, characterized in that: The wall surface of the fixing portion corresponding to the insertion opening is in an arc structure.
10. The ureteral occluder according to claim 3, characterized in that: After the fixing piece is inserted into the fixing hole, a portion of the fixing piece extends out of the fixing hole.