Matrix type balloon dilatation catheter

Abstract

The invention provides a matrix type balloon dilatation catheter, and belongs to the technical field of balloon catheters. The balloon dilatation catheter comprises a catheter body and a balloon assembly, wherein a guide tip is arranged at the far end of the catheter body; the balloon assembly is arranged at the far end of the catheter body, the far end of the balloon assembly is adjacent to the near end of the guide tip, the balloon assembly is provided with a plurality of rows of balloon units arranged in the axial direction of the catheter body, each balloon unit is provided with a plurality of sub-balloon bodies arranged in the circumferential direction of the catheter body, and each sub-balloon body is used for being independently filled or contracted. The balloon assembly has a plurality of filling shapes; the technical problems that in the prior art, the overall filling shape of a balloon cannot be flexibly adjusted, normal blood vessels are prone to being damaged, and a patient feels uncomfortable obviously are mainly solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of balloon catheters, and in particular relates to a matrix-type balloon dilatation catheter. Background Art

[0002] With the rapid development of modern medicine, minimally invasive interventional therapy has become a highly sought-after technology in the field of cardiovascular and cerebrovascular diseases, thanks to its advantages of minimal trauma, rapid recovery, and significant efficacy. Traditional surgical procedures face challenges such as high risks and long recovery periods, but the emergence of minimally invasive interventional therapy has brought new hope to patients. In recent years, with the collaborative innovation of materials science, imaging technology, and medical device research and development, interventional treatment technologies for intracranial vascular diseases have achieved remarkable progress.

[0003] Taking intracranial stent angioplasty as an example, this technology implants stents in narrowed or blocked blood vessels to restore blood vessels to normal state, effectively reducing the risk of serious complications such as stroke and cerebral hemorrhage; intravascular thrombectomy and aspiration therapy can accurately remove blood clots in blood vessels, playing a key role within the golden treatment time window of acute ischemic stroke, greatly improving the patient's prognosis.

[0004] However, in the actual operation of interventional treatment, when facing stenotic blood vessels, it is usually necessary to use a balloon dilatation catheter to pre-dilate the stenotic area. As a key tool for intravascular angioplasty, balloon dilatation catheters have been widely used in percutaneous transluminal angioplasty and percutaneous transluminal coronary angioplasty. Most existing balloon dilatation catheters adopt a structure with a single expandable balloon at the distal end of the catheter. By inflating and expanding the balloon, the vascular lesion area is expanded to achieve the treatment purpose. However, the above-mentioned balloon dilatation catheters still have many shortcomings: when the balloon body is inflated, it can only expand unidirectionally with the center as the axis, and it is difficult to flexibly adjust the shape according to actual needs; the balloon is large in size and will occupy too much non-lesion area during the treatment process; the balloon body has a large area after inflation, and it rubs frequently with the blood vessel wall, which can easily cause damage to normal blood vessels; at the same time, the balloon requires a large amount of liquid to be filled, which will cause the patient to have a strong feeling of distension and weight, causing obvious discomfort.

[0005] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Summary of the Invention

[0006] The purpose of the present invention is to provide a matrix balloon dilatation catheter to solve the technical problems in the prior art that the overall filling shape of the balloon cannot be flexibly adjusted, normal blood vessels are easily damaged, and patients suffer obvious discomfort.

[0007] In order to achieve the above objectives, the matrix balloon dilatation catheter of the present invention provides the following technical solutions:

[0008] A matrix-type balloon dilatation catheter, comprising:

[0009] a catheter body, wherein a guide tip is provided at the distal end of the catheter body;

[0010] A balloon assembly is arranged at the distal end of the catheter body, and the distal end of the balloon assembly is arranged adjacent to the proximal end of the guide tip. The balloon assembly has multiple rows of balloon units arranged axially along the catheter body, and each balloon unit has multiple sub-balloon bodies arranged circumferentially around the catheter body. Each of the sub-balloon bodies is used to be individually inflated or scaled so that the balloon assembly has a variety of inflation shapes.

[0011] As a further optimized technical solution, the catheter body has a plurality of filling channels arranged along the axial direction, and each of the sub-balloons is connected to at least one of the filling channels.

[0012] As a further optimized technical solution, the number of the filling channels is the same as the number of the daughter balloons, and each of the filling channels is used to connect to one of the daughter balloons.

[0013] As a further optimized technical solution, a filling hole is provided between each of the sub-balloon bodies and the corresponding filling channel, and each of the filling channels controls the deformation of the corresponding sub-balloon body through the filling hole.

[0014] As a further optimized technical solution, a monitoring component for monitoring the internal pressure of the daughter balloon is provided in each of the filling holes.

[0015] As a further optimized technical solution, the balloon units at both ends of the balloon assembly are conical in shape after being filled, and the overall radial dimensions of the balloon units at both ends gradually decrease from close to the middle balloon unit to away from the middle balloon unit.

[0016] As a further optimized technical solution, the balloon units located at both ends of the balloon assembly are arranged symmetrically.

[0017] As a further optimized technical solution, all balloon units between the balloon units at both ends of the balloon assembly are cylindrical in shape after being filled.

[0018] As a further optimized technical solution, any one of the sub-balloon bodies between the balloon units at both ends of the balloon assembly is fan-shaped.

[0019] As a further optimized technical solution, in all the balloon units, an angle is set between any two adjacent balloon units along the circumferential offset, so that the sub-balloon bodies between any two adjacent balloon units are staggered along the circumferential direction.

[0020] Beneficial effects:

[0021] The matrix balloon dilatation catheter of the present invention has a balloon assembly with multiple rows of balloon units arranged axially along the catheter body, and each balloon unit has multiple sub-balloons arranged circumferentially around the catheter body that can be individually inflated or scaled, thereby making it possible to flexibly adjust the filling shape of the balloon assembly and accurately adapt to different vascular lesions. Whether it is a complex stenosis at a vascular bifurcation or an irregular vascular blockage, the filling of specific sub-balloons can be controlled to form a shape that fits the lesion area, reducing the impact on normal blood vessels, achieving targeted expansion, and greatly improving the treatment effect. Compared with traditional single balloons, the balloon assembly of the present invention effectively controls the contact area between the balloon and the vascular cavity wall by selectively filling the sub-balloons, reducing friction and avoiding damage to normal blood vessels. In addition, since the sub-balloons can be individually controlled and can be filled on demand, the required amount of filling is greatly reduced, which significantly reduces the patient's feeling of bloating and weight during treatment, improves the patient's treatment experience and comfort, and further improves the accuracy and safety of treatment.

[0022] Furthermore, the monitoring component installed in the filling hole can monitor the internal pressure of the sub-balloon in real time. The doctor can adjust the filling volume in time according to the pressure data to ensure safe treatment. Once abnormal pressure occurs, measures can be taken quickly to prevent blood vessel damage or balloon rupture due to excessive pressure.

[0023] Furthermore, the balloon units at both ends of the balloon assembly are conical in shape after being inflated, and the overall radial dimensions of the balloon units at both ends gradually decrease from close to the middle balloon unit to away from the middle balloon unit. This structural design allows the balloon assembly to pass more smoothly when entering and exiting the vascular lesion site, reducing resistance and irritation to the blood vessel wall.

[0024] Furthermore, an angle is set between any two adjacent balloon units along the circumferential offset, so that the sub-balloon bodies between any two adjacent balloon units are arranged in a circumferentially staggered manner. In this way, during the folding process of the balloon assembly, there is a certain amount of movement space and angular margin between the staggered sub-balloon bodies, avoiding interference and obstruction between them. Each sub-balloon body can adjust its position and shape more freely and successfully complete the folding action. At the same time, this design makes the balloon assembly more evenly stressed during folding, and will not be damaged by local stress concentration, thereby ensuring the integrity and reliability of the balloon assembly during multiple folding and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings and the accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. Among them:

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0027] Figure 2 This is a schematic structural diagram of a balloon assembly according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the catheter body at the location where the balloon assembly is installed according to one embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the assembly of a balloon unit located at the distal end of a balloon assembly according to one embodiment of the present invention;

[0030] Figure 5 Schematic diagram of multiple perspectives of a balloon unit at the end of a balloon assembly according to an embodiment of the present invention, wherein: Figure 5 (a) is a schematic diagram of the end face of the balloon unit. Figure 5 (b) is a schematic diagram of the main view of the balloon unit, Figure 5 (c) is a three-dimensional schematic diagram of the balloon unit;

[0031] Figure 6 This is a schematic diagram of the assembly of one of the balloon units located in the middle of the balloon assembly according to one embodiment of the present invention;

[0032] Figure 7 Schematic diagram of multiple viewing angles of one of the balloon units located in the middle of the balloon assembly according to one embodiment of the present invention, wherein: Figure 7 (a) is a schematic diagram of the end face of the balloon unit. Figure 7 (b) is a three-dimensional schematic diagram of the balloon unit;

[0033] Figure 8 A schematic cross-sectional view of a catheter body according to an embodiment of the present invention;

[0034] Figure 9 A schematic end view of a connecting joint according to an embodiment of the present invention.

[0035] In the figure: 100, catheter body; 110, guide tip; 120, filling channel; 130, guidewire channel; 200, balloon assembly; 210, balloon unit; 211, daughter balloon body; 212, filling hole; 300, connecting joint. DETAILED DESCRIPTION

[0036] The following is a clear and complete description of 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 are within the scope of protection of the present invention.

[0037] In the description of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. In addition, the term "proximal end" refers to the end close to the operator, and "distal end" refers to the end away from the operator.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0039] The shapes and sizes of the components in the drawings do not reflect the actual proportions of the products, and are only intended to illustrate the contents of the present invention.

[0040] The present invention provides a matrix-type balloon dilatation catheter, wherein a guide tip 110 is provided at the distal end of the catheter body 100, and a balloon assembly 200 is located at the distal end of the catheter body 100 adjacent to the guide tip 110. The balloon assembly 200 includes multiple rows of balloon units 210 arranged axially along the catheter body 100, and each balloon unit 210 is composed of multiple sub-balloon bodies 211 arranged circumferentially around the catheter body 100 and can be individually inflated or scaled; the catheter body 100 has multiple filling channels 120, and each sub-balloon body 211 is individually controlled to deform through the filling channels 120; the balloon units 210 at both ends of the balloon assembly 200 are conical after being inflated, and the middle balloon unit 210 is cylindrical, and the sub-balloon bodies 211 between adjacent balloon units 210 are staggered. The present invention achieves flexible adjustment of the shape of the balloon assembly 200 by relatively independently controlling the filling of each sub-balloon body 211, can accurately adapt to the site of vascular lesions, reduce the impact on normal blood vessels, reduce the amount of filling and the patient's discomfort, and improve the targetedness and effectiveness of treatment. It has good application prospects in the field of vascular interventional treatment.

[0041] Example 1

[0042] like Figure 1 As shown, the matrix balloon dilatation catheter includes a catheter body 100 and a balloon assembly 200 .

[0043] The catheter body 100 serves as the delivery vehicle for the balloon assembly 200 into the patient's body. A guidewire channel 130 is coaxially arranged internally for the passage of a guidewire to guide the catheter body 100 to the lesion site. The guidewire channel 130 is evenly spaced circumferentially with multiple axially extending filling channels 120. The distal ends of the filling channels 120 connect to the balloon assembly 200 and are used to allow a filling medium (such as saline or contrast agent) to pass through to inflate or deflate the balloon assembly 200. A guide tip 110 is provided at the distal end of the catheter body 100. This guide tip 110 is made of a medical-grade, ultra-smooth material and features a streamlined, curved distal end that effectively reduces resistance to passage within the blood vessel, guiding the catheter body 100 smoothly into the blood vessel and to the lesion site.

[0044] like Figure 2 As shown, the balloon assembly 200 is disposed at the distal end of the catheter body 100, adjacent to the proximal end of the guide tip 110. The balloon assembly 200 comprises multiple rows of balloon units 210 arranged axially along the catheter body 100. Each balloon unit 210 comprises multiple sub-balloons 211 arranged circumferentially around the catheter body 100. Each sub-balloon 211 is independently inflated or deflated, thereby enabling the balloon assembly 200 to be formed to conform to the lesion area for targeted dilation in response to different vascular lesions. For example, if a stenotic vascular lesion presents an irregular shape, only the sub-balloons 211 that match the stenotic shape can be inflated, avoiding unnecessary compression of surrounding normal vascular tissue.

[0045] Furthermore, the catheter body 100 has a plurality of filling channels 120 arranged along the axial direction, and each sub-balloon body 211 is connected to at least one filling channel 120, providing a liquid transmission channel for the filling of the sub-balloon body 211. Preferably, the number of filling channels 120 is the same as the number of sub-balloon bodies 211, and each filling channel 120 is used to connect a sub-balloon body 211, so that independent and precise filling control of each sub-balloon body 211 can be achieved. A filling hole 212 is set between each sub-balloon body 211 and the corresponding filling channel 120, and each filling channel 120 controls the deformation of the corresponding sub-balloon body 211 through the filling hole 212, so that the filling medium can flow into or out of the sub-balloon body 211 smoothly. In order to ensure the stability and sealing of the filling medium transmission, a medical-grade silicone rubber sealing ring can be arranged at the filling hole 212 to effectively prevent the leakage of the filling medium. In addition, each filling hole 212 is provided with a monitoring component for monitoring the internal pressure of the sub-balloon body 211. The monitoring component is a miniature pressure sensor with the characteristics of high precision and fast response. It can feed back the pressure data to the external control terminal through the preset signal transmission line in the catheter body 100 in real time. The doctor can adjust the filling volume in a timely and accurate manner based on the monitored pressure data, providing strong guarantee for safe treatment.

[0046] In this embodiment, the balloon assembly 200 is composed of 8 rows of balloon units 210 arranged axially along the catheter body 100, and each row of balloon units 210 includes 6 sub-balloon bodies 211 arranged circumferentially around the catheter body 100. The balloon units 210 are numbered in sequence from the distal end to the proximal end of the catheter body 100. The farthest end is the first row of balloon units 210, and the 6 sub-balloon bodies 211 corresponding to the first row of balloon units 210 are numbered 1-1, 1-2, 1-3, 1-4, 1-5, 1-6, and so on. The most proximal balloon unit 210 is the eighth row, and the 6 sub-balloon bodies 211 corresponding to the eighth row of balloon units 210 are numbered 8-1, 8-2, 8-3, 8-4, 8-5, and 8-6, respectively. The arrangement of each sub-balloon body 211 corresponding to the filling channel 120 is as follows: Figure 3 、 Figure 4 and Figure 8 shown.

[0047] Furthermore, if Figure 4 、 Figure 5 As shown, the balloon units 210 at both ends of the balloon assembly 200 assume a conical shape when inflated, with the overall radial dimensions of the balloon units 210 at both ends gradually decreasing from the center balloon unit 210 toward the center balloon unit 210. This shape design facilitates smooth entry and exit of the balloon assembly 200 into and out of vascular lesions, particularly when navigating bends in blood vessels, by reducing collision and friction with the vessel wall. The symmetrical arrangement of the balloon units 210 at both ends of the balloon assembly 200 helps maintain balance and stability during operation.

[0048] like Figure 6 、 Figure 7 As shown, all balloon units 210 between the balloon units 210 at both ends of the balloon assembly 200 are cylindrical in shape after filling. Any sub-balloon body 211 between the balloon units 210 at both ends of the balloon assembly 200 is fan-shaped. And all fan-shaped sub-balloon bodies 211 have equal volumes. The purpose of this design is that the fan-shaped sub-balloon bodies 211 with equal volumes can be precisely operated using a unified control parameter standard during the filling and scaling process. At the same time, according to the preset treatment plan, the filling medium flow required for each sub-balloon body 211 can be more conveniently calculated and controlled. By independently controlling each sub-balloon body 211, the overall shape and expansion degree of the balloon assembly 200 can be precisely adjusted. This standardized design simplifies the operating process, reduces the difficulty of surgical operation, and improves the controllability and safety of the operation.

[0049] Furthermore, among all the balloon units 210, an angle is set between any two adjacent balloon units 210 along the circumferential offset, so that the sub-balloon bodies 211 between any two adjacent balloon units 210 are arranged in a circumferential staggered manner. The purpose of this design is to facilitate the folding of the balloon assembly 200. Specifically, during the folding process, there is a certain amount of activity space and angular margin between the staggered sub-balloon bodies 211, which avoids interference and obstruction between each other. Each sub-balloon body 211 can adjust its position and shape more freely and complete the folding action smoothly. At the same time, this design makes the balloon assembly 200 more evenly stressed when folded, and will not cause damage to the balloon assembly 200 due to local stress concentration, thereby ensuring the integrity and reliability of the balloon assembly 200 during multiple folding and use. In addition, in the present embodiment, the balloon unit 210 and the sub-balloon body 211 are made of high-strength, high-elasticity medical-grade polyurethane material, which has good pressure resistance while ensuring flexibility, so that each sub-balloon body 211 can withstand multiple filling and scaling operations.

[0050] Furthermore, if Figure 1 、 Figure 9 As shown, the proximal end of the catheter body 100 is provided with a connecting joint 300 for connecting to an external device for supplying filling medium. The connecting joint 300 has connecting holes corresponding to all the filling channels 120 to ensure sufficient supply of filling medium in each filling channel 120.

[0051] Specifically, during the surgical procedure, first, during the surgical preparation phase, the doctor obtains detailed imaging data of the patient's blood vessels through angiography to determine the length, diameter, and specific morphology of the stenotic area. Then, the matrix-type balloon dilatation catheter is slowly introduced through the patient's radial artery or femoral artery puncture point. Under the real-time monitoring of the X-ray angiography system, the medical staff delivers the catheter body 100 into the patient's blood vessels along the guide wire. The guide wire guides the catheter body 100 to slowly advance along the vascular path until the balloon assembly 200 reaches the stenotic area of ​​the lesion. At this time, the doctor operates the filling channel 120 control switch connected to the specific sub-balloon body 211 on the external control terminal according to the specific situation of the stenosis. The balloon assembly 200 is formed into a locally convex shape to perform targeted dilation of the stenotic area. During the filling process, the micro pressure sensor in the filling hole 212 monitors the internal pressure of the sub-balloon body 211 in real time. After the expansion is completed, the doctor opens the reflux valve of the corresponding filling channel 120 through the control terminal to extract the liquid in the sub-balloon body 211. The balloon assembly 200 quickly returns to its original shape under the elastic action of the medical-grade polyurethane material, and then slowly withdraws the catheter body 100 from the blood vessel. The entire treatment process has minimal impact on the normal parts of the patient's blood vessels, effectively reducing the risk of postoperative complications.

[0052] In summary, the matrix balloon dilatation catheter provided by the present invention effectively solves the problems in the prior art through its unique structural design and has good application prospects in the field of vascular interventional treatment.

[0053] It will be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A matrix balloon dilatation catheter, characterized in that: include: A catheter body (100), wherein a guide tip (110) is provided at the distal end of the catheter body (100); A balloon assembly (200) is provided at the distal end of a catheter body (100), the distal end of the balloon assembly (200) being arranged adjacent to the proximal end of a guide tip (110), the balloon assembly (200) having a plurality of rows of balloon units (210) arranged axially along the catheter body (100), each balloon unit (210) having a plurality of sub-balloon bodies (211) arranged circumferentially around the catheter body (100), each of the sub-balloon bodies (211) being used for being individually inflated or scaled, so that the balloon assembly (200) has a plurality of inflated shapes.

2. The matrix balloon dilatation catheter according to claim 1, characterized in that: The catheter body (100) has a plurality of filling channels (120) arranged along the axial direction, and each of the sub-balloon bodies (211) is connected to at least one of the filling channels (120).

3. The matrix balloon dilatation catheter according to claim 2, characterized in that: The number of the filling channels (120) is the same as the number of the daughter balloon bodies (211), and each of the filling channels (120) is used to communicate with one of the daughter balloon bodies (211).

4. The matrix balloon dilatation catheter according to claim 3, characterized in that: A filling hole (212) is provided between each sub-balloon body (211) and the corresponding filling channel (120), and each filling channel (120) controls the deformation of the corresponding sub-balloon body (211) through the filling hole (212).

5. The matrix balloon dilatation catheter according to claim 4, characterized in that: A monitoring component for monitoring the internal pressure of the daughter balloon body (211) is provided in each of the filling holes (212).

6. The matrix balloon dilatation catheter according to any one of claims 1 to 5, characterized in that: The balloon units (210) at both ends of the balloon assembly (200) are conical in shape after being filled, and the overall radial dimensions of the balloon units (210) at both ends gradually decrease from the direction close to the middle balloon unit (210) to the direction away from the middle balloon unit (210).

7. The matrix balloon dilatation catheter according to claim 6, characterized in that: The balloon units (210) located at both ends of the balloon assembly (200) are arranged symmetrically.

8. The matrix balloon dilatation catheter according to claim 6, characterized in that: All balloon units (210) located between the balloon units (210) at both ends of the balloon assembly (200) are cylindrical in shape after being filled.

9. The matrix balloon dilatation catheter according to claim 8, characterized in that: Any one of the sub-balloon bodies (211) between the balloon units (210) at both ends of the balloon assembly (200) is fan-shaped.

10. The matrix balloon dilatation catheter according to any one of claims 1 to 5, characterized in that: In all the balloon units (210), any two adjacent balloon units (210) are offset along the circumferential direction at a set angle so that the sub-balloon bodies (211) between any two adjacent balloon units (210) are staggered along the circumferential direction.

Images