Double-balloon intravascular stent with pre-expansion function
By designing a pre-expanded double balloon vascular stent, combining the guidewire and balloon structure, pre-expanding the vascular stenosis area is achieved, solving the problem of separate operation in the prior art that increases time and risks, and improving surgical efficiency and safety.
Patent Information
- Application Number
- CN202422265442.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-09-14
AI Technical Summary
In the prior art, pre-diffusion and implantation operations are required separately before implantation of the vascular stent, which increases the surgical time and risk.
A double balloon vascular stent with pre-diffusion function is designed, and the pre-diffusion of the lesion area is achieved through a combination of a guidewire, a connecting catheter, a first balloon, a second balloon and a dilated stent, and the effective expansion of the vascular stenosis area is achieved through the setting of a pressurized tube, a regulating cylinder, a stomata and a trachea.
It reduces the surgical operation time, reduces the risk of surgery, and realizes effective expansion of the vascular stenosis area, making it easier to follow-up stent implantation.
Smart Images
Figure CN223248372U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a double-balloon vascular stent with pre-expansion. Background Art
[0002] A vascular stent is an internal stent placed in the diseased segment on the basis of luminal balloon dilatation to support the narrowed and occluded segment of the blood vessel, reduce the elastic recoil and reshaping of the blood vessel, and maintain smooth blood flow in the lumen. Some internal stents also have the function of preventing restenosis. Vascular stents are mainly divided into coronary stents, cerebral vascular stents, renal artery stents, aortic stents, etc. Currently, before the surgical implantation of a vascular stent, it is usually necessary to use a pre-expansion balloon to reach the stenosis of the lesion and apply a certain pressure for pre-expansion to displace the plaque in the lesion area, so as to facilitate the subsequent implantation of the vascular stent. Since the pre-expansion and vascular stent implantation work often need to be performed separately, the time of the surgical operation and the degree of risk during the operation are greatly increased. Utility Model Content
[0003] The purpose of the utility model is to provide a double-balloon vascular stent with pre-expansion, which has the advantages of being able to effectively pre-expand the diseased area before the vascular stent is implanted, thereby reducing the time and risk of surgical operation.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-balloon vascular stent with pre-expansion, comprising a connecting catheter, a guide wire inserted into the middle end of the connecting catheter, a first balloon fixedly connected to the left end of the connecting catheter, a first airway fixedly connected between the upper end of the first balloon and the surface of the connecting catheter, a second balloon fixedly connected to the left end of the connecting catheter and located to the right of the first balloon, an expansion stent sleeved on the outer surface of the second balloon, a second airway fixedly connected between the lower end of the second balloon and the surface of the connecting catheter, an adjusting cylinder fixedly connected between the right end of the first airway and the right end of the second airway, a pressurizing tube fixedly connected to the middle end of the top of the adjusting cylinder, The inner cavity of the adjusting cylinder is movably connected to an air guide seat, and an air guide hole is provided at the upper end of the air guide seat. Both ends of the front surface of the adjusting cylinder are fixedly connected to a limiting plug block, and the middle end of the front surface of the adjusting cylinder is fixedly connected to a sealing sleeve. The inner cavity of the sealing sleeve is movably connected to a rotating frame through a bearing, and a second spring is fixedly connected between the back side of the rotating frame and the front surface of the air guide seat. The four sides of the rotating frame are fixedly connected to guide blocks, and the outer surface of the adjusting cylinder is movably connected to a rotating sleeve. Limited plug holes are provided at both ends of the inner cavity of the rotating sleeve, and the surface of the limiting plug block is movably connected to the surface of the limiting plug hole. Guide grooves are provided around the inner cavity of the rotating sleeve, and the surface of the guide block is movably connected to the surface of the guide groove.
[0005] As a preferred solution, a first rubber ring is fixedly connected to the middle end of the air guide seat, and the surface of the first rubber ring is movably connected to the inner cavity of the regulating cylinder.
[0006] As a preferred solution, a second rubber ring is fixedly connected to the middle end of the rotating frame, there are two second rubber rings, and the surface of the second rubber ring is movably connected to the inner cavity of the sealing sleeve.
[0007] As a preferred solution, both ends of the back surface of the rotating frame are movably connected to sliding rods, and the back surfaces of the sliding rods are fixedly connected to the front surface of the air guide seat.
[0008] As a preferred solution, an anti-slip convex strip is fixedly connected to the outer surface of the rotating sleeve, and the anti-slip convex strip is in a rectangular shape.
[0009] As a preferred solution, a rubber sealing pad is fixedly connected to the back of the air guide seat, and the back of the rubber sealing pad is movably connected to the inner cavity of the regulating cylinder.
[0010] As a preferred solution, a first spring is fixedly connected to the back surface of the guide block, and the back surface of the first spring is fixedly connected to the surface of the guide groove.
[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0012] 1. The utility model provides a guide wire arrangement to facilitate medical personnel to guide the connecting catheter, the first balloon, the second balloon and the expandable stent into the stenotic area of the patient's blood vessel to be expanded during the patient's vascular stent implantation operation. By arranging the pressurized tube, the regulating tube, the air guide hole, the first air guide tube and the first balloon, the stenotic area of the blood vessel can be pre-expanded, thereby facilitating the medical personnel to subsequently implant the expandable stent. By arranging the rotating sleeve, the limiting plug, the limiting plug, the guide groove, the guide block, the rotating frame, the sealing sleeve, the second spring, the air guide seat and the air guide hole, it is convenient for medical personnel to adjust the conduction path between the regulating box and the first air guide tube and the second air guide tube after the pre-expansion of the stenotic area of the blood vessel is completed, so that the pressurized air can pressurize the interior of the second balloon through the second air guide tube, and the second balloon can be implanted into the stenotic area of the blood vessel to be expanded under the action of the pressurized expansion, thereby achieving the effect of dilating the stenotic area of the patient.
[0013] 2. The utility model effectively improves the sealing effect between the periphery of the air guide seat and the adjustment cylinder by providing the first rubber ring. The second rubber ring effectively improves the sealing performance between the sealing sleeve and the rotating frame, preventing the pressurized air inside the adjustment cylinder from leaking to the outside. The sliding rod guides the rotating frame and the air guide seat, ensuring that the rotating frame and the air guide seat can rotate synchronously. The anti-slip ridges effectively improve the anti-slip effect of the rotating sleeve surface, making it easier for personnel to operate the rotating sleeve for rotation. The rubber sealing pad improves the sealing performance between the back of the air guide seat and the adjustment cylinder, preventing the first and second air guide pipes from communicating due to poor sealing. The first spring supports the guide block and the rotating sleeve and compresses the first spring during the movement of the rotating sleeve, causing the first spring to generate tension on the rotating sleeve, so that the rotating sleeve can subsequently move and reset, and the limiting plug can be inserted into the limiting plug hole, thereby maintaining effective positioning of the rotating sleeve. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a three-dimensional diagram of the utility model;
[0015] Figure 2 This is a schematic diagram of a partial cross-sectional view of the front structure of the connecting catheter of the utility model;
[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the right side of the regulating cylinder of the present invention;
[0017] Figure 4 For this utility model Figure 3 A partial enlarged view of point A in the figure.
[0018] In the figure: 1. guide wire; 2. first balloon; 3. second balloon; 4. expansion stent; 5. connecting catheter; 6. first airway tube; 7. second airway tube; 8. pressurizing tube; 9. rotating sleeve; 10. adjusting cylinder; 11. first rubber ring; 12. second rubber ring; 13. sealing sleeve; 14. first spring; 15. rotating frame; 16. guide block; 17. guide groove; 18. limit socket; 19. limit socket; 20. sliding rod; 21. second spring; 22. air guide seat; 23. rubber sealing pad; 24. air guide hole. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.
[0020] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.
[0021] Example 1:
[0022] See also Figures 1-4 As shown, the utility model provides a double-balloon vascular stent with pre-expansion, comprising a connecting catheter 5, a guide wire 1 inserted into the middle end of the connecting catheter 5, a first balloon 2 fixedly connected to the left end of the connecting catheter 5, a first airway 6 fixedly connected between the upper end of the first balloon 2 and the surface of the connecting catheter 5, a second balloon 3 fixedly connected to the left end of the connecting catheter 5 and located to the right of the first balloon 2, an expansion stent 4 sleeved on the outer surface of the second balloon 3, a second airway 7 fixedly connected between the lower end of the second balloon 3 and the surface of the connecting catheter 5, an adjusting cylinder 10 fixedly connected between the right end of the first airway 6 and the right end of the second airway 7, a pressurizing tube 8 fixedly connected to the middle end of the top of the adjusting cylinder 10, and an airway movably connected to the inner cavity of the adjusting cylinder 10 Seat 22, an air guide hole 24 is provided at the upper end of the air guide seat 22, both ends of the front surface of the adjusting cylinder 10 are fixedly connected to the limiting plug 19, the middle end of the front surface of the adjusting cylinder 10 is fixedly connected to the sealing sleeve 13, the inner cavity of the sealing sleeve 13 is movably connected to the rotating frame 15 through a bearing, a second spring 21 is fixedly connected between the back side of the rotating frame 15 and the front surface of the air guide seat 22, the rotating frame 15 is fixedly connected with the guide block 16 on all sides, the outer surface of the adjusting cylinder 10 is movably connected to the rotating sleeve 9, and both ends of the inner cavity of the rotating sleeve 9 are provided with a limiting socket 18, the surface of the limiting plug 19 is movably connected to the surface of the limiting socket 18, and the inner cavity of the rotating sleeve 9 is provided with a guide groove 17, and the surface of the guide block 16 is movably connected to the surface of the guide groove 17.
[0023] In the present technical solution, the setting of the guide wire 1 facilitates the medical staff to guide the connecting catheter 5, the first balloon 2, the second balloon 3 and the expansion stent 4 to the stenosis area of the blood vessel that the patient needs to expand during the vascular stent implantation operation. The setting of the pressurizing tube 8, the adjusting cylinder 10, the air guide hole 24, the first air guide tube 6 and the first balloon 2 can pre-expand the stenosis area of the blood vessel, thereby facilitating the subsequent implantation of the expansion stent 4 by the medical staff. The arrangement of the block 16, the rotating frame 15, the sealing sleeve 13, the second spring 21, the air guide seat 22 and the air guide hole 24 makes it convenient for medical personnel to adjust the conduction path between the adjustment box 10 and the first air guide tube 6 and the second air guide tube 7 after the pre-expansion of the vascular stenosis area is completed, so that the pressurized air can pass through the second air guide tube 7 to pressurize the interior of the second balloon 3, and the second balloon 3 can implant the expansion stent 4 into the area where the blood vessel needs to be expanded under the action of pressurized expansion, thereby achieving the effect of expansion treatment of the patient's vascular stenosis.
[0024] Example 2:
[0025] On the basis of embodiment 1, the present invention is as follows Figures 1-4 As shown, it is disclosed that the middle end of the air guide seat 22 is fixedly connected to the first rubber ring 11, the surface of the first rubber ring 11 is movably connected to the inner cavity of the adjusting cylinder 10, the middle end of the rotating frame 15 is fixedly connected to the second rubber ring 12, the number of the second rubber ring 12 is two, the surface of the second rubber ring 12 is movably connected to the inner cavity of the sealing sleeve 13, both ends of the back side of the rotating frame 15 are movably connected to the sliding rod 20, the back side of the sliding rod 20 is fixedly connected to the front surface of the air guide seat 22, the outer surface of the rotating sleeve 9 is fixedly connected to the anti-slip ridge, the shape of the anti-slip ridge is rectangular, the back side of the air guide seat 22 is fixedly connected to the rubber sealing pad 23, the back side of the rubber sealing pad 23 is movably connected to the inner cavity of the adjusting cylinder 10, the back side of the guide block 16 is fixedly connected to the first spring 14, and the back side of the first spring 14 is fixedly connected to the surface of the guide groove 17.
[0026] In the present technical solution, the provision of the first rubber ring 11 effectively improves the sealing effect between the air guide seat 22 and the regulating cylinder 10. The provision of the second rubber ring 12 effectively improves the sealing performance of the contact between the sealing sleeve 13 and the rotating frame 15, thereby preventing the pressurized air inside the regulating cylinder 10 from leaking to the outside. The provision of the slide rod 20 achieves the purpose of guiding the rotating frame 15 and the air guide seat 22, ensuring that the rotating frame 15 and the air guide seat 22 can rotate synchronously. The provision of the anti-slip rib effectively improves the anti-slip effect of the surface of the rotating sleeve 9, making it convenient for personnel to operate the rotating sleeve 9. The rubber sealing gasket 23 is provided to improve the sealing performance of the contact between the back of the air guide seat 22 and the regulating tube 10, thereby avoiding the communication between the first air guide tube 6 and the second air guide tube 7 due to poor sealing. The first spring 14 is provided to support the guide block 16 and the rotating sleeve 9, and to compress the first spring 14 during the movement of the rotating sleeve 9, so that the first spring 14 can generate tension on the rotating sleeve 9, so that the rotating sleeve 9 can be moved and reset later, and the limiting plug 19 can be inserted into the limiting plug hole 18, thereby maintaining effective limitation of the rotating sleeve 9.
[0027] The working principle of the present invention is as follows: through the setting of the guide wire 1, it is convenient for medical personnel to guide the connecting catheter 5, the first balloon 2, the second balloon 3 and the expansion stent 4 to the patient's vascular stenosis area that needs to be expanded during the patient's vascular stent implantation surgery, and when the stenosis area of the blood vessel needs to be pre-expanded, the pressurizing tube 8 is connected to the balloon expansion pressure pump, and under the action of the balloon expansion pressure pump, the interior of the first balloon 2 can be pressurized through the pressurizing tube 8, the regulating tube 10, the air guide hole 24 and the first air guide tube 6, so that the first balloon 2 can pre-expand the stenosis area of the blood vessel under the action of pressurized expansion, thereby facilitating the subsequent implantation of the expansion stent 4 by medical personnel, and when the pre-expansion of the stenosis part of the blood vessel is completed, the second balloon 3 and the expansion stent 4 are extended to the area where the pre-expansion of the blood vessel is completed, and then the rotating sleeve 9 is pulled to move, so that the limiting plug 19 can be moved from the surface of the limiting plug hole 18 The surface is disengaged, and the limit of the rotating sleeve 9 can be released. Subsequently, the rotating sleeve 9 is operated to rotate, which can drive the guide block 16 and the rotating frame 15 to rotate along the bearing on the sealing sleeve 13 through the guide groove 17. The rotation of the rotating frame 15 can drive the second spring 21, the air guide seat 22 and the air guide hole 24 to rotate, so that the air guide hole 24 can be disengaged from the front of the first air guide tube 6 under the action of rotation, and can be in front of the second air guide tube 7, so that the second air guide tube 7 and the regulating tube 10 can be connected, and the first air guide tube 6 and the regulating tube 10 can be cut off. Then, the balloon expansion pressure pump is started again to pressurize the inside of the second balloon 3 through the pressurizing tube 8, the regulating tube 10, the air guide hole 24 and the second air guide tube 7, so that the second balloon 3 can be pressurized and expanded to implant the expandable stent 4 into the area where the blood vessel needs to be expanded under the action of pressurization, thereby achieving the effect of dilation treatment of the patient's vascular stenosis.
[0028] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.
[0029] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.
Claims
1. A double-balloon vascular stent with pre-expansion, comprising a connecting catheter (5), characterized in that: A guide wire (1) is inserted into the middle end of the connecting catheter (5), the left end of the connecting catheter (5) is fixedly connected to a first balloon (2), the upper end of the first balloon (2) and the surface of the connecting catheter (5) are fixedly connected to a first airway tube (6), the left end of the connecting catheter (5) and located to the right of the first balloon (2) are fixedly connected to a second balloon (3), the outer surface of the second balloon (3) is sleeved with an expansion stent (4), the lower end of the second balloon (3) and the surface of the connecting catheter (5) are fixedly connected to a second airway tube (7), the right end of the first airway tube (6) and the right end of the second airway tube (7) are fixedly connected to an adjusting cylinder (10), the middle end of the top of the adjusting cylinder (10) is fixedly connected to a pressurizing tube (8), the inner cavity of the adjusting cylinder (10) is movably connected to an air guide seat (22), and the upper end of the air guide seat (22) is provided with an air guide seat. The regulating cylinder (10) has an air hole (24), both ends of the front surface of the regulating cylinder (10) are fixedly connected to the limiting plug block (19), the middle end of the front surface of the regulating cylinder (10) is fixedly connected to the sealing sleeve (13), the inner cavity of the sealing sleeve (13) is movably connected to the rotating frame (15) through a bearing, a second spring (21) is fixedly connected between the back surface of the rotating frame (15) and the front surface of the air guide seat (22), the rotating frame (15) is fixedly connected to the guide block (16) on all sides, the outer surface of the regulating cylinder (10) is movably connected to the rotating sleeve (9), the inner cavity of the rotating sleeve (9) is provided with a limiting plug hole (18), the surface of the limiting plug block (19) is movably connected to the surface of the limiting plug hole (18), the inner cavity of the rotating sleeve (9) is provided with a guide groove (17), and the surface of the guide block (16) is movably connected to the surface of the guide groove (17).
2. The pre-expanded double-balloon vascular stent according to claim 1, characterized in that: A first rubber ring (11) is fixedly connected to the middle end of the air guide seat (22), and a surface of the first rubber ring (11) is movably connected to the inner cavity of the regulating cylinder (10).
3. The pre-expanded double-balloon vascular stent according to claim 1, characterized in that: A second rubber ring (12) is fixedly connected to the middle end of the rotating frame (15), the number of the second rubber rings (12) is two, and the surface of the second rubber ring (12) is movably connected to the inner cavity of the sealing sleeve (13).
4. The double-balloon vascular stent with pre-expansion according to claim 1, characterized in that: Both ends of the back side of the rotating frame (15) are movably connected to a sliding rod (20), and the back side of the sliding rod (20) is fixedly connected to the front surface of the air guide seat (22).
5. The pre-expanded double-balloon vascular stent according to claim 1, characterized in that: The outer surface of the rotating sleeve (9) is fixedly connected with an anti-slip convex strip, and the anti-slip convex strip is in a rectangular shape.
6. The pre-expanded double-balloon vascular stent according to claim 1, characterized in that: The back of the air guide seat (22) is fixedly connected to a rubber sealing pad (23), and the back of the rubber sealing pad (23) is movably connected to the inner cavity of the regulating cylinder (10).
7. The pre-expanded double-balloon vascular stent according to claim 1, characterized in that: The back surface of the guide block (16) is fixedly connected to a first spring (14), and the back surface of the first spring (14) is fixedly connected to the surface of the guide groove (17).