Heart defect plugging system
By designing the delivery cable and stapler structure of the heart defect occlusion system, the problems of poor fit and high residual shunt rate of existing occluders are solved. It provides a simple operation and good fit occlusion effect, supports re-insertion and adjustment, and reduces the complexity of operation and shunt risk.
Patent Information
- Application Number
- CN202423064937.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2026-03-17
- Estimated Expiration
- 2034-12-12
AI Technical Summary
Existing foramen ovale occluders suffer from poor fit, slow endothelialization, and high residual shunt rates. Furthermore, absorbable occluders are expensive, complex to operate, and still have relatively high residual shunt rates.
A cardiac defect closure system was designed, comprising a delivery cable, a stapler, and a loading sheath. The delivery cable is formed by a spiral of steel wire and is used in conjunction with steel wire. The stapler is composed of steel claws. Through the refinement and reinforcement of the delivery structure, easy operation and good fit are achieved, and the stapler can be re-inserted.
It achieves a simple structure and easy operation. After the oval hole is pinned, the double-layer structure fits well, reducing residual diversion. The pinning device can be inserted again to adjust the angle and improve the sealing effect.
Smart Images
Figure CN223994923U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical equipment technology, and more specifically, to a heart defect closure system. Background Technology
[0002] Patent foramen ovale (PFO) is currently the most common congenital heart disease. Treatment for PFO-related stroke, migraine, slump syndrome, and orthostatic hypoxemia typically involves PFO closure. However, conventional occluders often suffer from poor fit, slow endothelialization, and a high rate of residual shunts. Existing absorbable occluders are expensive, complex to operate, and still have a relatively high residual shunt rate. Utility Model Content
[0003] This invention provides a heart defect closure system. The system has a simple structure and is easy to operate. After the foramen ovale is pinned, the double-layer structure fits well, which can reduce residual shunt. If the residual shunt is large, it can be re-inserted.
[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:
[0005] A heart defect closure system, comprising,
[0006] The conveying steel cable is formed by spirally winding steel wires, and steel wires are also provided inside the conveying steel cable along its axial direction, with the two ends of the steel wires extending to the two ends of the conveying steel cable respectively.
[0007] A stapler is connected to the conveying steel cable. The stapler includes several steel claws, one end of each steel claw is connected to the center of the stapler, and the other end of each steel claw is bent in the same direction.
[0008] The loading sheath, which is hollow inside, is used to load and accommodate the transport cable and the stapler.
[0009] As a further improvement, the diameter of the steel wire is 0.4-0.6 mm.
[0010] As a further improvement, the outer diameter of the transmission cable is 1-1.5 mm.
[0011] As a further improvement, several of the steel claws are arranged in an array around the center of the fastener.
[0012] As a further improvement, the bending arc of the steel claw is greater than or equal to 180°.
[0013] As a further improvement, the loading sheath is a PVC hose, with one end connected to a fixing connector and the other end connected to a hemostatic valve.
[0014] As a further improvement, the hemostatic valve is also connected to a tubing for venting air and injecting saline solution.
[0015] As a further improvement, the end of the hose away from the hemostatic valve is connected to a three-way valve, which also includes a first outlet and a second outlet.
[0016] As a further improvement, a second connecting joint is provided at the center of the stapler, and a first connecting joint is provided at one end of the conveying steel cable. The first connecting joint and the second connecting joint are connected by a threaded engagement.
[0017] As a further improvement, the end of the conveying cable away from the first connecting joint is connected to a handle.
[0018] Compared with the prior art, the technical solution provided by this utility model has the following advantages:
[0019] (1) The cardiac defect closure system of this utility model has a simple structure and is easy to operate. The stapler is retracted into the loading sheath, thereby delivering the stapler to the required position. After the stapler is engaged, the rotating delivery structure disengages the first and second connecting joints. In addition, if there is a large residual flow after the stapler is engaged, the thinner delivery structure allows for the insertion of another stapler.
[0020] (2) The heart defect closure system of this utility model uses a combination of steel cable and steel wire to form a conveying structure. On the one hand, the conveying structure can be made thinner, so that the conveying structure can turn arbitrarily during the conveying process; on the other hand, the strength of the conveying structure is improved, and the angle of the stapler is easy to adjust. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the steel cable transmission structure;
[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0023] Figure 3 This is a schematic diagram of the loading sheath structure;
[0024] Figure 4 This is a schematic diagram of the fastener structure.
[0025] Label Explanation:
[0026] 1. Conveyor cable; 11. Steel wire; 12. First connecting joint; 2. Handle; 3. Loading sheath; 31. Fixing joint; 4. Hose; 5. Hemostatic valve; 6. T-connector; 61. First outlet; 62. Second outlet; 7. Stapling device; 71. Steel claw; 72. Second connecting joint. Detailed Implementation
[0027] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.
[0028] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0029] Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this utility model. In addition to indicating orientation or positional relationships, some of the aforementioned terms may also have other meanings; for example, the term "upper" may, in certain circumstances, indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate for the embodiments of this application described herein.
[0031] Combination Figure 1-4 As shown, this embodiment provides a heart defect closure system, including a delivery cable 1, a stapler 7, and a loading sheath 3.
[0032] Specifically, such as Figure 1 and Figure 2 As shown, the conveying steel cable 1 is formed by spirally winding steel wires, which can be made of materials such as stainless steel. The conveying steel cable 1 has internal space for installation, allowing steel wires 11 to be arranged along its axial direction inside the cable. The two ends of each steel wire 11 extend to both ends of the conveying steel cable 1. The material of the steel cable 1 is the same as that used for the conveying steel cable 1.
[0033] The stapler 7 is connected to the conveying steel cable 1. As the conveying steel cable 1 moves, it carries the stapler 7 to the designated position. For example... Figure 4As shown, the stapler 7 specifically includes several steel claws 71, one end of each steel claw 71 is connected to the center of the stapler 7, and the other end of each steel claw 71 is bent in the same direction.
[0034] The interior of the loading sheath 3 is hollow, used to load and accommodate the conveying steel cable 1 and the stapler 7.
[0035] In this design, the conveying steel cable 1 and the steel wire 11 are used together to form a conveying structure. The diameter of the steel wire 11 is 0.4-0.6 mm, for example, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, or 0.6 mm. The outer diameter of the conveying steel cable 1 is 1-1.5 mm, for example, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, or 1.5 mm. By combining the conveying steel cable 1 and the steel wire 11, the conveying structure can be made thinner, allowing it to turn freely during the conveying process; on the other hand, the strength of the conveying structure is improved, facilitating the adjustment of the angle of the stapler 7.
[0036] Combined Figure 4 As shown, several steel claws 71 are arranged in an array around the center of the stapler 7. Preferably, two steel claws 71 are provided. More preferably, three steel claws 71 are provided. Even more preferably, four steel claws 71 are provided. The oval hole is specifically slit-shaped. When two steel claws 71 are provided, the angle of the stapler 7 needs to be adjusted so that the steel claws 71 grip both sides of the oval hole respectively. When three steel claws 71 are provided, the gripping force on both sides of the oval hole is easily uneven. When four steel claws 71 are provided, on the one hand, it is easier to ensure that steel claws 71 are gripping both sides of the oval hole, and on the other hand, the gripping force on both sides of the oval hole is more uniform. In other cases, more steel claws 71 can also be provided.
[0037] Preferably, the bending arc of the steel claw 71 is greater than or equal to 180°, so that the steel claw 71 can better grip.
[0038] Combined Figure 3 As shown, the loading sheath 3 is a PVC flexible tube, with one end connected to a fixing connector 31 and the other end connected to a hemostatic valve 5. The hemostatic valve 5 is also connected to a flexible tube 4, which is used for venting air and injecting saline solution. Specifically, the end of the flexible tube 4 furthest from the hemostatic valve 5 is connected to a three-way valve 6. The three-way valve 6 includes a first outlet 61 and a second outlet 62. The first outlet 61 can be connected to a syringe or similar device for injecting saline solution; the second outlet 62 is connected to the outside environment. The fixing connector 31 is made of stainless steel.
[0039] A second connecting joint 72 is provided at the center of the stapler 7, and a first connecting joint 12 is provided at one end of the conveying steel cable 1. The first connecting joint 12 and the second connecting joint 72 are connected by a threaded engagement, thereby connecting the stapler 7 and the conveying steel cable 1. Preferably, the stapler 7 is made of titanium alloy shape memory metal.
[0040] For ease of operation, the end of the conveying cable 1 away from the first connecting joint 12 is connected to the handle 2.
[0041] In this scheme, the occlusion system operates as follows: the end of the delivery cable 1 furthest from the handle 2 enters the loading sheath 3 through the hemostatic valve 5 and extends out of the loading sheath 3. This end of the delivery cable 1, after extending from the loading sheath 3, connects to the stapler 7. Then, pulling the delivery cable 1 retracts the stapler 7 into the loading sheath 3. It should be noted that after the stapler 7 is retracted into the loading sheath 3, the tip of the steel claw 71 must be located at the fixed connector 31 to facilitate subsequent extension of the stapler 7 from the loading sheath 3. During the delivery of the stapler 7, physiological saline is injected through the first outlet 61, and air in the occlusion system is expelled through the second outlet 62.
[0042] This sealing system has a simple structure and is easy to operate. After the oval aperture is pinned, the double-layer structure fits well, reducing residual flow. If the residual flow is large, another pin can be inserted. The conveying cable 1 and steel wire 11 combine to form a conveying structure. After conveying the pinner 7 to the required position, the pinner 7 extends from the loading sheath 3, releasing the steel claws 71 of the pinner 7, which return to their arc shape. Because the conveying structure is strong enough to support the pinner 7, it can be better adjusted. For example, the steel claws 71 of the pinner 7 can be adjusted to be close to the intersepta on both sides of the oval aperture, so that the steel claws 71 can better grip. After the pinner 7 is in place, the conveying structure is rotated to disengage the first connecting joint 12 and the second connecting joint 72. In addition, if there is a large residual flow after the pinner 7 is engaged, the thinner conveying structure allows for the insertion of another pinner 7.
[0043] The terms “installation,” “setup,” “equipped with,” and “connection” used herein should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0044] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A heart defect occlusion system, characterized by: The utility model relates to a kind of medical devices and methods, including, Transportation cable (1) is formed by spiral winding of steel wire, and steel wire (11) is further provided in the transportation cable (1) along its axial direction, and the two ends of the steel wire (11) extend to the two ends of the transportation cable (1) respectively; Nailer (7) is connected with the transportation cable (1), and the nailer (7) includes a plurality of steel claws (71), one end of the steel claw (71) is connected to the center of the nailer (7), and the other end of the steel claw (71) is bent towards the same direction; Loading sheath (3) is hollow inside, used for loading to contain the transportation cable (1) and nailer (7).
2. The heart defect closure system of claim 1, wherein: The diameter of the steel wire (11) is 0.4-0.6mm.
3. The heart defect closure system of claim 2, wherein: The outer diameter of the transportation cable (1) is 1-1.5mm.
4. The heart defect closure system according to any one of claims 1-3, characterized in that: A plurality of steel claws (71) are arrayed around the center of the nailer (7).
5. The cardiac defect closure system according to claim 4, characterized in that: The bending arc of the steel claw (71) is greater than or equal to 180°.
6. The cardiac defect closure system of claim 4, wherein: The loading sheath (3) is a PVC hose, one end of which is connected to a fixed connector (31), and the other end is connected to a hemostatic valve (5).
7. The heart defect closure system of claim 6, wherein: The hemostatic valve (5) is also connected to a hose (4), which is used for exhaust and injection of physiological saline.
8. The heart defect closure system of claim 7, wherein: The end of the hose (4) away from the hemostatic valve (5) is connected to a tee (6), which also includes a first outlet (61) and a second outlet (62).
9. The heart defect closure system of claim 5, wherein: The center of the nailer (7) is provided with a second connecting connector (72), and one end of the transportation cable (1) is provided with a first connecting connector (12), and the first connecting connector (12) and the second connecting connector (72) are connected by thread cooperation.
10. The heart defect closure system of claim 9, wherein: The end of the transportation cable (1) away from the first connecting connector (12) is connected to a handle (2).