Balloon dilatation device for cardiovascular interventional therapy

Abstract

The invention provides a balloon dilatation device for cardiovascular interventional therapy, and belongs to the technical field of medical tools. Comprising an inflation mechanism, the inflation mechanism comprises an inflator pump, a push rod and a pressure pump, and the end, away from the push rod, of the inflator pump is fixedly connected with a catheter; and the expansion assembly is used for expanding the narrow and occluded blood vessel. According to the balloon dilatation device, by arranging the expansion assembly, medical staff can select the guiders of different shapes to conduct dilatation treatment on the blood vessels of a patient according to the blood vessels of different shapes, and then the balloon dilatation device provided by the technical scheme can conduct dilatation treatment on the blood vessels of Y-shaped contours, T-shaped contours and L-shaped contours; the length of the two inclined tubes of the inflated and expanded Y-shaped guider is increased, the blood vessel with the Y-shaped outline of a patient can be fully expanded, the blood vessel cannot be excessively deformed at the bending position in the expansion process, therefore, the blood vessel cannot be torn, and the safety of surgical treatment is improved.

Description

Technical Field

[0001] This invention relates to the field of medical instrument technology, and in particular to a balloon dilation device for cardiovascular interventional therapy. Background Technology

[0002] Cardiovascular interventional therapy is a technique that, under the guidance of imaging methods, enters the heart chambers or blood vessels through vascular puncture to perform diagnosis or treatment. Balloon dilation devices are widely used in cardiovascular interventional therapy, mainly for the treatment of coronary heart disease, congenital heart disease, and other diseases. During the treatment, a catheter with a balloon is inserted to the site of stenosis or occlusion of the blood vessel, and then the balloon is inflated to compress the plaque, causing the blood vessel wall to dilate, thereby relieving stenosis and improving myocardial blood supply and other cardiovascular diseases.

[0003] Conventional balloons are linear in shape. However, due to the diverse structural types of cardiovascular vessels, such as Y-shaped, T-shaped, and L-shaped vessels, these uniquely shaped vessels are more complex than conventional ones. Therefore, conventional linear balloons cannot adequately support the complex vessel walls, resulting in poor plaque compression. To address this issue, currently, flexible balloons are commonly used to compress and dilate these uniquely shaped vessels. After inflation, these balloons can conform to different contours based on the shape of the vessel wall. Compared to conventional linear balloons, these balloons are larger and require more precise inflation. However, in actual use, placing flexible balloons at vessel bends is difficult, and inflation can easily cause significant deformation of the tortuous vessel, potentially leading to vascular tearing. This increases the difficulty and reduces the safety of the procedure. Therefore, this invention provides a balloon dilation device for cardiovascular interventional therapy to meet these needs. Summary of the Invention

[0004] The technical problem this invention aims to solve is to provide a balloon dilation device for cardiovascular interventional therapy. By setting up an expansion component, medical personnel can select different shaped guides to dilate the patient's blood vessels according to different shapes. This allows the balloon dilation device provided by this technical solution to dilate Y-shaped, T-shaped, and L-shaped blood vessels. Taking the Y-shaped guide as an example, before catheter inflation, the two oblique tubes on the Y-shaped guide are short, allowing medical personnel to easily insert the Y-shaped guide into the patient's blood vessel, improving the efficiency of Y-shaped guide insertion. After catheter inflation, the length of the two oblique tubes of the inflated Y-shaped guide increases, allowing for sufficient dilation of the patient's "Y"-shaped blood vessel. Furthermore, the dilation process does not cause excessive deformation of the blood vessel at the bend, thus preventing vascular tearing and improving the safety of the surgical treatment. This design solves the problem that current balloon dilation devices, when used to treat bends, often cause significant deformation of the bend after inflation, easily leading to vascular tearing, which increases the difficulty of the surgery and reduces its safety.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A balloon dilation device for cardiovascular interventional therapy includes an inflation mechanism comprising an inflation cylinder, a push rod, and a pressure pump. The push rod is inserted into the inflation cylinder, and the pressure pump is fixedly connected to the end of the inflation cylinder. A catheter is fixedly connected to the end of the inflation cylinder away from the push rod, and a first guidewire positioning tube is fixedly connected inside the catheter. An expansion assembly is also included, used to dilate a compressed and tortuous blood vessel, and the expansion assembly is connected to the catheter.

[0006] Optionally, the expansion assembly includes a Y-shaped guide, a T-shaped guide, and an L-shaped guide fixedly connected to the end of the catheter. The Y-shaped guide includes a Y-shaped guide cylinder and a first connecting tube. The first connecting tube is fixedly connected to the bottom of the Y-shaped guide cylinder. The Y-shaped guide cylinder has a "Y"-shaped profile and a first balloon is fixedly connected to its outer wall. A second balloon is fixedly connected to the outer wall of the first connecting tube. The T-shaped guide includes a T-shaped guide cylinder and a second connecting tube. The second connecting tube is fixedly connected to the bottom of the T-shaped guide cylinder. The T-shaped guide cylinder has a "T"-shaped profile and a first balloon is fixedly connected to its outer wall. There is a third balloon, and a fourth balloon is fixedly connected to the outer wall of the second connecting tube; the L-shaped guide includes an L-shaped guide cylinder and a third connecting tube, the third connecting tube is fixedly connected to the bottom of the L-shaped guide cylinder, the L-shaped guide cylinder has an "L" shaped outline, and a fifth balloon is fixedly connected to its outer wall, and a sixth balloon is fixedly connected to the outer wall of the third connecting tube; the Y-shaped guide cylinder, the T-shaped guide cylinder and the L-shaped guide cylinder are all slidably connected to an adjusting rod inside, one end of the adjusting rod is fixedly connected to a piston, the other end of the adjusting rod is fixedly connected to a top plate, and the top of the piston is fixedly connected to a spring.

[0007] Optionally, a sealing gasket is fixedly connected to the outer wall of the piston, and the sealing gasket is made of rubber.

[0008] Optionally, the ends of the Y-shaped guide cylinder, the T-shaped guide cylinder, and the L-shaped guide cylinder are all provided with receiving grooves, and the receiving grooves are concave tapered profiles.

[0009] Optionally, the adjusting rod is inserted through the storage slot, and the bottom of the top plate is attached to the bottom inner wall of the storage slot.

[0010] Optionally, a limiting cylinder is fixedly connected to the inner wall of the top end of the Y-shaped guide cylinder, the T-shaped guide cylinder, and the L-shaped guide cylinder. The limiting cylinder is sleeved on the outside of the spring. One end of the spring is fixed to the piston, and the other end of the spring is fixed to the top of the limiting cylinder. The height of the limiting cylinder is the same as the length of the spring after it is contracted.

[0011] Optionally, the Y-shaped guide cylinder, the T-shaped guide cylinder, and the L-shaped guide cylinder are all provided with a second air inlet, and the distance between the second air inlet and the bottom of the limiting cylinder is the same as the thickness of the piston.

[0012] Optionally, the conduit is threadedly connected to the first connecting tube, the second connecting tube, and the third connecting tube.

[0013] Optionally, a second guide wire positioning tube, a third guide wire positioning tube, and a fourth guide wire positioning tube are fixedly connected inside the first connecting tube, the second connecting tube, and the third connecting tube, respectively, and the second guide wire positioning tube, the third guide wire positioning tube, and the fourth guide wire positioning tube are all inserted into the inner wall of the first guide wire positioning tube.

[0014] Optionally, the first connecting pipe, the second connecting pipe, and the third connecting pipe are respectively provided with a first inflation hole, a third inflation hole, and a fourth inflation hole.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, by setting up an expansion component, medical personnel can select different shaped guides to perform vasodilation and compression therapy on blood vessels of different shapes. This allows the balloon dilation device provided by this technical solution to perform compression therapy on Y-shaped, T-shaped, and L-shaped blood vessels. Taking a Y-shaped blood vessel as an example, medical personnel select a Y-shaped guide for treatment. The Y-shaped guide has two usage states: before catheter inflation, the two inclined tubes on the Y-shaped guide tube are shorter, allowing medical personnel to easily insert the Y-shaped guide into the patient's blood vessel, improving the efficiency of Y-shaped guide insertion. After the catheter is inflated, the first balloon, which was originally folded and stored in the storage slot, is pushed out and unfolded by the top plate and adjusting rod. This allows the first balloon to expand outward while inflating. After inflation, the length of the two oblique tubes of the Y-shaped guide increases, which can fully expand and compress the patient's "Y"-shaped blood vessels. Moreover, the compression process will not cause excessive deformation of the blood vessels at the bends, thus preventing vascular tearing and improving the safety of surgical treatment. Furthermore, the Y-shaped guide is adapted to the contour of the patient's blood vessels, which can improve the efficiency of medical staff in placing the Y-shaped guide, thereby improving the efficiency and success rate of the surgery. Attached Figure Description

[0016] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0017] Figure 1 A three-dimensional structural diagram of a balloon dilation device for cardiovascular interventional therapy; Figure 2 Enlarged 3D structural diagram of the Y-shaped guide before inflation; Figure 3 A three-dimensional cross-sectional view of the Y-shaped guide before inflation; Figure 4 A cross-sectional three-dimensional structural diagram of the Y-shaped guide tube before inflation and its assembly with the expansion components; Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 Enlarged 3D structural diagram of the Y-shaped guide after inflation; Figure 7 A cross-sectional three-dimensional structural diagram of the Y-shaped guide after inflation; Figure 8 A cross-sectional three-dimensional structural diagram of the Y-shaped guide tube after inflation and its assembly with the expansion components; Figure 9 Enlarged 3D structural diagram of the T-shaped guide before inflation; Figure 10 A three-dimensional cross-sectional view of the T-shaped guide before inflation; Figure 11 Enlarged 3D structural diagram of the T-shaped guide after inflation; Figure 12 A cross-sectional three-dimensional structural diagram of the T-shaped guide after inflation; Figure 13 Enlarged 3D structural diagram of the L-shaped guide before inflation; Figure 14 A three-dimensional cross-sectional view of the L-shaped guide before inflation; Figure 15 Enlarged 3D structural diagram of the L-shaped guide after inflation; Figure 16 A cross-sectional three-dimensional structural diagram of the L-shaped guide after it has been inflated.

[0018] Figure label: 1. Inflation mechanism; 101. Inflation cylinder; 102. Push rod; 103. Pressure pump; 2. Guide tube; 201. First guide wire positioning tube; 3. Y-shaped guide; 301. Y-shaped guide cylinder; 302. First balloon; 303. First connecting tube; 304. Second balloon; 305. First inflation port; 306. Second guide wire positioning tube; 4. Adjusting rod; 401. Piston; 402. Sealing gasket; 403. Top plate; 404. Spring; 405. Storage 406. Groove; 407. Limiting cylinder; 408. Second inflation port; 5. T-shaped guide; 501. T-shaped guide cylinder; 502. Third balloon; 503. Second connecting tube; 504. Fourth balloon; 505. Third inflation port; 506. Third guide wire positioning tube; 6. L-shaped guide; 601. L-shaped guide cylinder; 602. Fifth balloon; 603. Third connecting tube; 604. Sixth balloon; 605. Fourth inflation port; 606. Fourth guide wire positioning tube.

[0019] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0020] The present invention provides a balloon dilation device for cardiovascular interventional therapy, which is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0021] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0022] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0023] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0024] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly. Example

[0025] like Figure 1 As shown, an embodiment of the present invention provides a balloon dilation device for cardiovascular interventional therapy, including an inflation mechanism 1. The inflation mechanism 1 includes an inflation cylinder 101, a push rod 102, and a pressure pump 103. The push rod 102 is inserted into the inflation cylinder 101, and the pressure pump 103 is fixedly connected to the end of the inflation cylinder 101. A catheter 2 is fixedly connected to the end of the inflation cylinder 101 away from the push rod 102. A first guidewire positioning tube 201 is fixedly connected inside the catheter 2. The operator presses the push rod 102 to pump air from the inflation cylinder 101 into the catheter 2, and then uses the air in the catheter 2 to inflate the balloon. The pressure pump 103 on the inflation cylinder 101 is used to detect the air pressure in the catheter 2 in real time, and then feeds it back to the medical staff to remind them of the air pressure value in the catheter 2, so as to facilitate the medical staff to adjust the size of the balloon. In this technical solution, the working principle of the inflation mechanism 1 is disclosed as prior art, and therefore will not be described in detail.

[0026] Furthermore, during the process of inserting catheter 2 into the patient's body, angiography is required to determine the location of the cardiovascular disease. Then, under ultrasound guidance, the guidewire is inserted into the disease location of the patient's blood vessel, and catheter 2 is then inserted into the patient's body along the guidewire using the first guidewire positioning tube 201.

[0027] As one implementation method in this embodiment, such as Figures 1 to 8 As shown, the expansion assembly is used to expand and compress tortuous blood vessels. The expansion assembly is connected to the catheter 2. The expansion assembly includes a Y-shaped guide 3 fixedly connected to the end of the catheter 2. The Y-shaped guide 3 includes a Y-shaped guide cylinder 301 and a first connecting tube 303. The first connecting tube 303 is fixedly connected to the bottom of the Y-shaped guide cylinder 301. The Y-shaped guide cylinder 301 has a "Y" shaped outline and a first balloon 302 is fixedly connected to its outer wall. A second balloon 304 is fixedly connected to the outer wall of the first connecting tube 303.

[0028] In the above structure, the Y-shaped guide tube 301 is a circular tube structure with a "Y"-shaped outline. The first balloon 302 is installed on the outer wall of the two inclined tubes at the top, and the straight tube at the bottom is fixed to the first connecting tube 303. This arrangement allows the entire outer wall of the Y-shaped guide tube 301 to be equipped with balloons. Medical personnel can insert the Y-shaped guide 3 into the patient's blood vessels. When the first balloon 302 and the second balloon 304 are inflated, they can expand and compress the "Y"-shaped blood vessels in the patient's body. This arrangement allows the Y-shaped guide 3 to be structurally adapted to the patient's "Y"-shaped blood vessels, thereby reducing excessive compression on the patient's blood vessels after balloon inflation, preventing excessive deformation of the tortuous blood vessels after balloon inflation, and thus improving the patient's safety during treatment and the effectiveness of balloon compression therapy.

[0029] In this embodiment, as Figures 3 to 8 As shown, an adjusting rod 4 is slidably connected inside the Y-shaped guide cylinder 301. One end of the adjusting rod 4 is fixedly connected to a piston 401, and the other end of the adjusting rod 4 is fixedly connected to a top plate 403. A spring 404 is fixedly connected to the top of the piston 401, and a sealing gasket 402 made of rubber is fixedly connected to the outer wall of the piston 401. A receiving groove 405 is provided at the end of the Y-shaped guide cylinder 301. The receiving groove 405 has a concave concave tapered profile. The adjusting rod 4 is inserted through the receiving groove 405, and the bottom of the top plate 403 is attached to the receiving groove 405. On the bottom inner wall of 05, a limiting cylinder 406 is fixedly connected to the top inner wall of the Y-shaped guide cylinder 301. The limiting cylinder 406 is sleeved on the outside of the spring 404. One end of the spring 404 is fixed to the piston 401 and the other end is fixed to the top of the limiting cylinder 406. The height of the limiting cylinder 406 is the same as the length of the spring 404 after it is contracted. A second air hole 407 is opened on the Y-shaped guide cylinder 301. The distance between the second air hole 407 and the bottom of the limiting cylinder 406 is the same as the thickness of the piston 401. A first air hole 305 is opened on the first connecting pipe 303.

[0030] In this technical solution, the outer circumference of the piston 401 matches the inner circumference of the Y-shaped guide cylinder 301. Before inflation, the top plate 403 of the Y-shaped guide cylinder 301 abuts against the storage groove 405 under the elastic force of the spring 404. At this time, under the sealing action of the sealing gasket 402, the piston 401 is tightly attached to the inner wall of the Y-shaped guide cylinder 301. One end of the outer wall of the first balloon 302 is fixed to the outer wall of the Y-shaped guide cylinder 301, and the other end is in a closed and sealed state, with its center fixed to the top plate 403. Therefore, the balloon is pulled and folded by the top plate 403 and stored in the storage groove 405 (e.g., Figure 3 and Figure 4As shown), when medical personnel inflate air into catheter 2, the piston 401 moves towards the top plate 403 under the pressure of the gas. During the movement of piston 401, the adjusting rod 4 pushes the top plate 403 to move synchronously with piston 401. This causes the first balloon 302, which is folded and stored in the storage slot 405, to be pushed out and unfolded by the top plate 403 and adjusting rod 4. At the same time, piston 401 pushes the air in the Y-shaped guide tube 301 into the first balloon 302 through the second inflation hole 407, causing the first balloon 302 to inflate and expand as it unfolds. During the continuous movement of piston 401, spring 404 is compressed and stored in the limiting tube 406 until piston 401... When the top of piston 401 touches the bottom of the limiting cylinder 406, piston 401 cannot move further due to the blocking effect of the limiting cylinder 406. Since the height of the limiting cylinder 406 is the same as the length of the spring 404 after compression, the fully compressed spring 404 is folded and stored inside the limiting cylinder 406. Since the distance between the second inflation port 407 and the bottom of the limiting cylinder 406 is the same as the thickness of piston 401, when piston 401 touches the bottom of the limiting cylinder 406, the air in the Y-shaped guide cylinder 301 is connected to the air in the first balloon 302. The operator can synchronously adjust the air pressure in the first balloon 302 and the second balloon 304 through the inflation mechanism 1 (e.g., Figure 7 and Figure 8 As shown in the figure, this improves the ease of operation and ensures the consistency of the internal air pressure adjustment of the first balloon 302 and the second balloon 304.

[0031] In summary, the Y-shaped guide 3 has two operating states: Before medical personnel inflate the catheter 2, the first balloon 302 and the second balloon 304 are in a deflated state. At this time, the two oblique tubes on the Y-shaped guide tube 301 are short, allowing medical personnel to easily insert the Y-shaped guide 3 into the patient's blood vessel. When the Y-shaped guide 3 reaches the location of the affected blood vessel, the two oblique tubes of the Y-shaped guide 3 are aligned with the two oblique sides of the "Y"-shaped contour blood vessel, and then air can be inflated into the catheter 2, causing the Y-shaped guide 3 to be inflated. Specifically, the air in the catheter 2 first enters the second balloon 304 through the first inflation port 305, and then the second balloon 304 is inflated and expanded. After the second balloon 304 is inflated, the gas continues to... Squeezing the piston 401 along the Y-shaped guide tube 301 causes the piston 401 to move toward the top plate 403. At this time, the first balloon 302, which was originally folded and stored in the storage slot 405, is pushed out and unfolded by the top plate 403 and the adjusting rod 4. This causes the first balloon 302 to inflate as it unfolds outward. After inflation, the length of the two oblique tubes of the Y-shaped guide 3 increases, which can fully expand and compress the blood vessels in the patient's "Y"-shaped contour. Moreover, the compression process will not cause excessive deformation of the blood vessels at the bend, thus preventing vascular tearing and improving the safety of the surgical treatment. Furthermore, the Y-shaped guide 3 is adapted to the contour of the patient's blood vessels, which can improve the efficiency of medical personnel in inserting the Y-shaped guide 3, thereby improving the efficiency and success rate of the surgery.

[0032] In this embodiment, as Figure 3 and Figure 7 As shown, the catheter 2 and the first connecting tube 303 are connected together by threads. The second guidewire positioning tube 306 is fixedly connected inside the first connecting tube 303. The second guidewire positioning tube 306 is inserted into the inner wall of the first guidewire positioning tube 201. The first connecting tube 303 is used to connect and fix the Y-shaped guide 3 and the catheter 2 together. The catheter 2 and the first connecting tube 303 are fixed by screw connection, which not only has good sealing performance but also makes the operation simple and convenient. After the first connecting rod is assembled with the catheter 2, the second guidewire positioning tube 306 is inserted into the first guidewire positioning tube 201. This setting allows the Y-shaped guide 3 to be smoothly implanted into the patient's blood vessel along the guidewire. Example

[0033] As one implementation method in this embodiment, such as Figures 9 to 16As shown, the expansion assembly also includes a T-shaped guide 5 and an L-shaped guide 6 fixedly connected to the end of the catheter 2. The T-shaped guide 5 includes a T-shaped guide cylinder 501 and a second connecting tube 503, with the second connecting tube 503 fixedly connected to the bottom of the T-shaped guide cylinder 501. The T-shaped guide cylinder 501 has a "T"-shaped profile, and a third balloon 502 is fixedly connected to its outer wall. A fourth balloon 504 is fixedly connected to the outer wall of the second connecting tube 503. The L-shaped guide 6 includes an L-shaped guide cylinder 601 and a third connecting tube 603, with the third connecting tube 603 fixedly connected to the L-shaped guide cylinder 601. At the bottom of 1, the L-shaped guide cylinder 601 has an "L" shaped outline, and a fifth balloon 602 is fixedly connected to its outer wall. A sixth balloon 604 is fixedly connected to the outer wall of the third connecting tube 603. An adjusting rod 4 is slidably connected inside both the T-shaped guide cylinder 501 and the L-shaped guide cylinder 601. A storage groove 405 is opened at the end of both the T-shaped guide cylinder 501 and the L-shaped guide cylinder 601. A limiting cylinder 406 is fixedly connected to the inner wall of the top of both the T-shaped guide cylinder 501 and the L-shaped guide cylinder 601. A second inflation hole 407 is opened on both the T-shaped guide cylinder 501 and the L-shaped guide cylinder 601.

[0034] In this technical solution, by setting T-shaped guides 5 and L-shaped guides 6, expansion and compression can be applied to the "T"-shaped and "L"-shaped blood vessels of the patient, thereby meeting the needs of different types of surgery. Among them, the T-shaped guide 5 has a "T"-shaped outline and two third balloons 502 are symmetrically arranged at the top. The T-shaped guide cylinder 501 at the position of the third balloons 502 is equipped with structures such as adjusting rod 4, piston 401, top plate 403 and spring 404. The end of the T-shaped guide cylinder 501 is provided with a receiving groove 405. This structure allows the fourth balloon 504 outside the second connecting tube 503 to inflate first after the catheter 2 is inflated. Then, the third balloons 502 at both ends of the top of the T-shaped guide 5 will also extend and inflate. Thus, the inflated third balloons 502 and fourth balloons 504 expand and compress the inner wall of the patient's blood vessels to achieve the therapeutic effect.

[0035] Furthermore, the L-shaped guide 6 has an "L"-shaped outline, and a fifth balloon 602 is installed on one side of the top. The L-shaped guide tube 601 at the position of the fifth balloon 602 is equipped with an adjusting rod 4, a piston 401, a top plate 403, and a spring 404. The end of the L-shaped guide tube 601 is provided with a receiving groove 405. This structure allows the sixth balloon 604 outside the third connecting tube 603 to inflate first after the catheter 2 is inflated. Then, the fifth balloon 602 at the top of the L-shaped guide 6 will also extend and inflate. Thus, the inflated fifth balloon 602 and sixth balloon 604 can expand and compress the inner wall of the patient's blood vessels to achieve a therapeutic effect.

[0036] Furthermore, the T-shaped guide 5 and L-shaped guide 6 work on the same principle as the Y-shaped guide 3, both having two operating states and the switching principle between the two states is also the same. Medical personnel can select different shaped guides to expand and compress the patient's blood vessels for different shapes, thereby improving the practicality of this device.

[0037] In this embodiment, as Figures 9 to 16 As shown, the catheter 2 is connected to the second connecting tube 503 and the third connecting tube 603 by threads. The second connecting tube 503 and the third connecting tube 603 are respectively fixedly connected to the third guidewire positioning tube 506 and the fourth guidewire positioning tube 606. The third guidewire positioning tube 506 and the fourth guidewire positioning tube 606 are inserted into the inner wall of the first guidewire positioning tube 201. The second connecting tube 503 and the third connecting tube 603 are respectively provided with a third inflation hole 505 and a fourth inflation hole 605. The catheter 2 is fixed to the T-shaped guide 5 by the second connecting tube 503, and the catheter 2 is fixed to the L-shaped guide 6 by the third connecting tube 603. This fixing method is consistent with the connection method of the Y-shaped guide 3 and the catheter 2, so that the assembly operation is consistent when medical personnel select guides.

[0038] The working principle of the technical solution provided by this invention is as follows: In use, medical personnel first select a suitable guide device based on the type of the patient's blood vessels. Taking a "Y"-shaped blood vessel as an example, the medical personnel select a Y-shaped guide device 3 and screw it to the end of the catheter 2 via the first connecting tube 303. First, angiography is used to determine the location of the cardiovascular disease. Then, under ultrasound guidance, a guidewire is inserted into the affected area of ​​the patient's blood vessel. The catheter 2 and the Y-shaped guide device 3 are then simultaneously inserted into the patient's body along the guidewire. When the Y-shaped guide device 3 reaches the affected blood vessel, the two oblique tubes of the Y-shaped guide device 3 are aligned with the two oblique sides of the "Y"-shaped blood vessel. Air is then inflated into the catheter 2. The air in the catheter 2 first enters the second balloon 304 through the first inflation port 305. Then, the second balloon 304 is inflated and expanded. After the second balloon 304 expands, the gas continues to press the piston 401 along the Y-shaped guide cylinder 301, causing the piston 401 to move towards the top plate 403. During the movement of the piston 401, the adjusting rod 4 pushes the top plate 403 to move synchronously with the piston 401, so that the first balloon 302, which is folded and stored in the storage slot 405, is pushed out by the top plate 403 and the adjusting rod 4 and unfolds. At the same time, the piston 401 pushes the air in the Y-shaped guide cylinder 301 into the first balloon 302 along the second inflation hole 407, causing the first balloon 302 to inflate and expand while unfolding. During the continuous movement of the piston 401, the spring 404 is compressed and stored in the limiting cylinder 406 until the piston 402... When the top of piston 401 touches the bottom of the limiting cylinder 406, piston 401 cannot move further due to the blocking effect of the limiting cylinder 406. Since the height of the limiting cylinder 406 is the same as the length of the spring 404 after compression, the fully compressed spring 404 is folded and stored inside the limiting cylinder 406. Since the distance between the second inflation port 407 and the bottom of the limiting cylinder 406 is the same as the thickness of piston 401, when piston 401 touches the bottom of the limiting cylinder 406, the air in the Y-shaped guide cylinder 301 is connected to the air in the first balloon 302. The operator can adjust the air pressure in the first balloon 302 and the second balloon 304 simultaneously through the inflation mechanism 1. The lengths of the two inclined tubes of the Y-shaped guide 3 after inflation change. The device is large enough to dilate and compress blood vessels in the patient's "Y"-shaped contour, thereby achieving the therapeutic purpose. After treatment, the gas in catheter 2 is first expelled. During the gas expulsion process, piston 401 will automatically reset under the elastic force of spring 404. During the resetting of piston 401, the air inside the first balloon 302 will enter the Y-shaped guide tube 301 through the second inflation port 407. At this time, the first balloon 302 and the second balloon 304 will gradually deflate. After piston 401 returns to its initial position, medical personnel will use ultrasound to observe whether the air inside the first balloon 302 and the second balloon 304 has been completely expelled. If not, the air can be continuously aspirated from the second balloon 304 by creating negative pressure in catheter 2 through inflation mechanism 1.After negative pressure is generated, the piston 401 moves in the opposite direction, which also draws air from the first balloon 302. Once the air in the first balloon 302 and the second balloon 304 is emptied, medical personnel can use a guidewire to remove the catheter 2 and the Y-shaped guide 3 from the patient's body. Finally, the guidewire is removed, completing the surgery.

[0039] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A balloon dilatation device for cardiovascular intervention, comprising an inflation mechanism, characterized in that, The inflation mechanism includes an inflation cylinder, a push rod, and a pressure pump. The push rod is inserted into the inflation cylinder, and the pressure pump is fixedly connected to the end of the inflation cylinder. A conduit is fixedly connected to the end of the inflation cylinder away from the push rod, and a first guide wire positioning tube is fixedly connected inside the conduit. An expansion component for dilating narrowed or occluded blood vessels, the expansion component being connected to the catheter.

2. The balloon dilation device for cardiovascular interventions according to claim 1, characterized in that The expansion assembly includes a Y-shaped guide, a T-shaped guide, and an L-shaped guide fixedly connected to the end of the catheter. The Y-shaped guide includes a Y-shaped guide cylinder and a first connecting tube. The first connecting tube is fixedly connected to the bottom of the Y-shaped guide cylinder. The Y-shaped guide cylinder has a "Y"-shaped outline and a first balloon is fixedly connected to its outer wall. A second balloon is fixedly connected to the outer wall of the first connecting tube. The T-shaped guide includes a T-shaped guide cylinder and a second connecting tube. The second connecting tube is fixedly connected to the bottom of the T-shaped guide cylinder. The T-shaped guide cylinder has a "T" shaped outline and a third balloon is fixedly connected to its outer wall. A fourth balloon is fixedly connected to the outer wall of the second connecting tube. The L-shaped guide includes an L-shaped guide cylinder and a third connecting tube. The third connecting tube is fixedly connected to the bottom of the L-shaped guide cylinder. The L-shaped guide cylinder has an "L" shaped outline and a fifth balloon is fixedly connected to its outer wall. A sixth balloon is fixedly connected to the outer wall of the third connecting tube. The Y-shaped guide cylinder, the T-shaped guide cylinder, and the L-shaped guide cylinder are all slidably connected to an adjusting rod. One end of the adjusting rod is fixedly connected to a piston, and the other end of the adjusting rod is fixedly connected to a top plate. A spring is fixedly connected to the top of the piston.

3. The balloon dilation device for cardiovascular interventional therapy according to claim 2, characterized in that, A sealing gasket, made of rubber, is fixedly connected to the outer wall of the piston.

4. The balloon dilation device for cardiovascular interventional therapy according to claim 2, characterized in that, The ends of the Y-shaped guide cylinder, the T-shaped guide cylinder and the L-shaped guide cylinder are all provided with a receiving groove, and the receiving groove is a concave tapered profile.

5. The balloon dilation device for cardiovascular interventional therapy according to claim 4, characterized in that, The adjusting rod is inserted through the storage slot, and the bottom of the top plate is attached to the bottom inner wall of the storage slot.

6. The balloon dilation device for cardiovascular interventional therapy according to claim 2, characterized in that, Limiting cylinders are fixedly connected to the inner walls of the top ends of the Y-shaped guide cylinder, the T-shaped guide cylinder, and the L-shaped guide cylinder. The limiting cylinders are sleeved on the outside of the spring. One end of the spring is fixed to the piston, and the other end of the spring is fixed to the top of the limiting cylinder. The height of the limiting cylinder is the same as the length of the spring after it is contracted.

7. The balloon dilation device for cardiovascular interventional therapy according to claim 6, characterized in that, The Y-shaped guide cylinder, the T-shaped guide cylinder, and the L-shaped guide cylinder are all provided with a second air inlet. The distance between the second air inlet and the bottom of the limiting cylinder is the same as the thickness of the piston.

8. The balloon dilation device for cardiovascular interventional therapy according to claim 2, characterized in that, The conduit is connected to the first connecting tube, the second connecting tube, and the third connecting tube by threads.

9. The balloon dilation device for cardiovascular interventional therapy according to claim 2, characterized in that, A second guide wire positioning tube, a third guide wire positioning tube, and a fourth guide wire positioning tube are fixedly connected inside the first connecting tube, the second connecting tube, and the third connecting tube, respectively. The second guide wire positioning tube, the third guide wire positioning tube, and the fourth guide wire positioning tube are all inserted into the inner wall of the first guide wire positioning tube.

10. The balloon dilation device for cardiovascular interventional therapy according to claim 2, characterized in that, The first connecting pipe, the second connecting pipe, and the third connecting pipe are respectively provided with a first inflation hole, a third inflation hole, and a fourth inflation hole.

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