Matrix type balloon dilatation system

Abstract

The invention provides a matrix type balloon dilatation system, and belongs to the technical field of balloon catheters. The system comprises a catheter, a balloon assembly, a filling medium storage part and a flow control part, the balloon assembly is arranged at the position, close to the far end by a set distance, of the catheter, the balloon assembly is provided with a plurality of rows of balloon units arranged in the axial direction of the catheter, and each balloon unit is provided with a plurality of sub-balloon bodies arranged in the circumferential direction of the catheter; each sub-balloon body is used for independently filling or scaling; the filling medium storage part is communicated with the near end of the catheter and is used for providing a filling medium for each sub-balloon body; the flow control part is communicated with the filling medium storage part and is used for controlling filling or scaling of each sub-balloon body according to the pressure in the balloon assembly; 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 balloon dilation system. Background Art

[0002] Interventional therapy for intracranial vascular diseases is a minimally invasive treatment primarily used to treat conditions such as intracranial aneurysms, cerebral vascular malformations, and cerebral artery stenosis. Methods such as intracranial stenting, intravascular thrombectomy, and aspiration therapy have achieved significant results for numerous patients. During interventional therapy, when encountering stenotic vessels, a balloon dilatation catheter is often used to pre-dilate the stenosis.

[0003] Balloon dilatation catheters, as key tools in intravascular angioplasty, have been widely used in percutaneous transluminal angioplasty and percutaneous transluminal coronary angioplasty. Currently, most balloon catheters on the market use a single expandable balloon at the distal end of the catheter. The balloon is inflated and expanded to dilate the vascular lesion, achieving the therapeutic goal.

[0004] However, existing balloon dilatation catheters still have many shortcomings: when the balloon 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 treatment; the posterior area of ​​the balloon is large after filling, and it rubs frequently with the blood vessel wall, which can easily cause damage to normal blood vessels; at the same time, the amount of fluid required to fill the balloon is large, which will cause the patient to have a strong sense 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 expansion system 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 dilation system of the present invention provides the following technical solutions:

[0008] A matrix balloon dilatation system, comprising:

[0009] catheter;

[0010] A balloon assembly is disposed at a predetermined distance from the distal end of the catheter, the balloon assembly comprising a plurality of rows of balloon units arranged axially along the catheter, each balloon unit comprising a plurality of sub-balloon bodies arranged circumferentially around the catheter, each sub-balloon body being configured to be independently inflated or deflated;

[0011] a filling medium storage portion, the filling medium storage portion being connected to the proximal end of the catheter and being used to provide a filling medium into each daughter balloon;

[0012] A flow control unit is communicated with the filling medium storage unit and is used to control the filling or scaling of each daughter balloon body according to the pressure in the balloon assembly.

[0013] As a further optimized technical solution, a plurality of filling channels are arranged axially in the catheter, and each sub-balloon is connected to at least one of the filling channels.

[0014] As a further optimized technical solution, the balloon units located at both ends of the balloon assembly are in a conical shape after being filled, and the balloon unit located in the middle of the balloon assembly is in a cylindrical shape after being filled.

[0015] As a further optimized technical solution, 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, any one of the sub-balloon bodies located in the middle of the balloon assembly is fan-shaped.

[0017] As a further optimized technical solution, in the balloon unit located in the middle of the balloon assembly, 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.

[0018] As a further optimized technical solution, the flow control part includes a pressure monitoring component and a flow pump unit. The pressure monitoring component is used to monitor the pressure in each sub-balloon body, and the flow pump unit individually controls the filling or scaling of each sub-balloon body according to the pressure feedback result of the pressure monitoring component.

[0019] As a further optimized technical solution, the pressure monitoring component includes a pressure sensor and a signal processing unit. The pressure sensor is arranged at the connecting position between each filling channel and the sub-balloon body. The pressure sensor is connected to the input end of the signal processing unit for transmitting the pressure signal to the signal processing unit. The output end of the signal processing unit is connected to the flow pump unit. The signal processing unit processes the pressure signal and controls the action of the flow pump unit according to the processing result.

[0020] As a further optimized technical solution, the balloon assembly has 8 columns, and each column of balloon units has 6 sub-balloon bodies.

[0021] As a further optimized technical solution, a guidewire channel is provided in the middle of the catheter, and all the filling channels are evenly arranged circumferentially around the guidewire channel.

[0022] Beneficial effects:

[0023] The balloon assembly of the present invention has multiple rows of balloon units arranged along the axial direction of the catheter, and each balloon unit has multiple sub-balloons arranged circumferentially around the catheter that can be inflated or scaled individually, that is, the sub-balloons are arranged in a matrix to form an overall balloon assembly. This design of the balloon assembly effectively breaks the single expansion mode of the traditional balloon, so that the complex pathological forms such as stenosis and deformity in the blood vessels can be reasonably obtained based on the internal pressure feedback of each sub-balloon when it is inflated, and the filling combination of the sub-balloons can be scientifically planned according to the pressure value inside the sub-balloons, and the three-dimensional shape of the balloon assembly can be adjusted in real time. Contour, to achieve fitted expansion of irregular lesions, accurately act on the lesions, and reduce the impact on normal blood vessels. At the same time, compared with traditional large-volume balloons, this system can effectively control the contact area between the balloon and the blood vessel wall by selectively filling the sub-balloons, reduce friction, and avoid damage to normal blood vessels. In addition, because the sub-balloons can be controlled individually 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 significantly improves the targetedness and effectiveness of the treatment.

[0024] Furthermore, the flow control part is composed of a pressure monitoring component and a flow pump unit, and the two work together. The pressure monitoring component monitors the pressure of each sub-balloon in real time, and the flow pump unit independently controls the filling channel flow according to the pressure feedback, thereby realizing precise regulation of the filling or scaling of the sub-balloon. Compared with the traditional balloon expansion system, this design can avoid balloon expansion shape deviation or local over-expansion caused by uneven pressure, and can flexibly and accurately shape the balloon shape according to the specific needs of different vascular lesions, thereby improving the treatment effect while reducing the risk of damage to normal vascular tissue.

[0025] Furthermore, by designing the pressure monitoring component to have a pressure sensor and a signal processing unit, and clarifying the connection relationship and work flow between the two, the pressure sensor is set at a key connection position, which can obtain the pressure data in each sub-balloon in real time and accurately, and transmit it to the signal processing unit in a timely manner. After the signal processing unit analyzes and processes the pressure signal, it accurately controls the action of the flow pump unit to form a complete closed-loop control system. This gives the balloon expansion system intelligent adjustment capabilities. Faced with complex and changeable vascular environments, the system can respond quickly and automatically adjust the filling or scaling state of the sub-balloon to ensure that the balloon always maintains the ideal pressure and shape during the expansion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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:

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0028] Figure 2 A schematic cross-sectional view of a catheter according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the catheter structure at the location where the balloon assembly is installed according to one embodiment of the present invention;

[0030] Figure 4 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 4 (a) is a schematic diagram of the end face of the balloon unit. Figure 4 (b) is a three-dimensional schematic diagram of the balloon unit;

[0031] Figure 5 This is a schematic structural diagram of one of the daughter balloons according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the three-dimensional structure of one of the balloon units located at the end of the balloon assembly according to one embodiment of the present invention;

[0033] Figure 7 FIG. 1 is a schematic diagram of the filling channel distribution of a balloon unit according to an embodiment of the present invention, wherein: Figure 7 (a) is a schematic diagram of the end face of the catheter; Figure 7 (b) is a schematic diagram of the catheter from another perspective;

[0034] Figure 8 This is a schematic diagram of the assembly of a connecting joint according to an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of multiple viewing angles of a first connecting member according to an embodiment of the present invention, wherein: Figure 9 (c) is a front view of the first connecting member, Figure 9 (a) Figure 9 (c) Cross-sectional view along the AA direction, Figure 9 (d) is a left side view of the first connecting member, Figure 9 (b) is a perspective view of the first connecting member;

[0036] Figure 10 This is a schematic diagram of multiple viewing angles of a second connecting member according to an embodiment of the present invention, wherein: Figure 10 (a) is the front view of the second connecting member, Figure 10 (b) is a left side view of the second connecting member, Figure 10 (c) is a top view of the second connecting member, Figure 10 (d) is a perspective view of the second connecting member;

[0037] Figure 11 This is a schematic diagram of multiple viewing angles of a third connecting member according to an embodiment of the present invention, wherein: Figure 11 (a) is a cross-sectional view of the first connecting member along the axial direction, Figure 11 (b) is a three-dimensional view of the third connecting member.

[0038] In the figure: 100, catheter; 110, filling channel; 111, connection port; 120, guidewire channel; 200, balloon assembly; 210, balloon unit; 211, sub-balloon body; 212, filling medium inlet; 300, filling medium storage unit; 400, pressure monitoring component; 410, pressure sensor; 411, transmission line; 420, signal processing unit; 500, flow pump unit; 600, delivery tube; 700, connecting joint; 710, first connecting piece; 720, second connecting piece; 730, third connecting piece. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] The present invention provides a matrix balloon dilatation system, which includes a catheter 100, a balloon assembly 200, a filling medium storage unit 300 and a flow control unit. The balloon assembly 200 is arranged near the distal end of the catheter 100 and is composed of multiple rows of balloon units 210. Each balloon unit 210 contains multiple sub-balloons 211 that can be individually inflated and scalable. The filling medium storage unit 300 is connected to the proximal end of the catheter 100 and is used to fill and release the medium for the sub-balloons 211. The flow control unit includes a pressure monitoring component 400 and a flow pump unit 500. The pressure monitoring component 400 monitors the pressure of the sub-balloons 211 in real time, and the flow pump unit 500 accurately controls the flow of the filling channel based on pressure feedback to achieve independent filling or scaling of the sub-balloons 211. The present invention solves the problems of traditional balloon dilatation catheters that are non-adjustable in shape, easily damage normal blood vessels, and cause obvious discomfort to patients. It can be flexibly shaped according to vascular lesions, reduce the impact on normal blood vessels, reduce the amount of filling, and alleviate patient discomfort. It has good clinical application prospects and promotion value.

[0044] Example 1

[0045] like Figure 1 As shown, the matrix balloon dilatation system includes a catheter 100, a balloon assembly 200, a filling medium storage unit 300 and a flow control unit.

[0046] Catheter 100 serves as a delivery vehicle for balloon assembly 200. A guidewire channel 120 is coaxially arranged within the catheter 100 for passing a guidewire to guide catheter 100 to the lesion site. Guidewire channel 120 is evenly spaced circumferentially along a plurality of axially extending filling channels 110. The distal ends of these filling channels 110 connect to balloon assembly 200, allowing the passage of a filling medium to inflate or deflate balloon assembly 200.

[0047] The balloon assembly 200 is positioned at a predetermined distance from the distal end of the catheter 100, forming a tip structure (commonly referred to as a "TIP") at the distal end of the catheter 100. This tip structure reduces resistance during intravascular navigation, enabling the catheter 100 to smoothly navigate tortuous vessels along a guidewire and precisely reach the lesion. The balloon assembly 200 comprises eight rows of balloon units 210 arranged axially along the catheter 100. Each row of balloon units 210 comprises six sub-balloon bodies 211 arranged circumferentially around the catheter 100. The balloon units 210 are numbered in sequence from the distal end to the proximal end of the catheter 100. The most distal balloon unit 210 is the first column, and the six sub-balloon bodies 211 corresponding to the first column of balloon units 210 are numbered 1-1, 1-2, 1-3, 1-4, 1-5, and 1-6, respectively. By analogy, the most proximal balloon unit 210 is the eighth column, and the six sub-balloon bodies 211 corresponding to the eighth column of balloon units 210 are numbered 8-1, 8-2, 8-3, 8-4, 8-5, and 8-6, respectively. For the arrangement of the filling channel 110, please refer to Figure 2 、 Figure 3 Each sub-balloon body 211 is connected to a filling channel 110. Specifically, the distal end of the filling channel 110 penetrates into the interior of the sub-balloon body 211 through a vertically outwardly bent connection port 111, so that each sub-balloon body 211 can be individually controlled to deform.

[0048] The filling medium storage portion 300 is connected to the proximal end of the catheter 100 through the delivery tube 600 for providing a filling medium to each daughter balloon 211. In this embodiment, the filling medium is a contrast agent.

[0049] The flow control part consists of a pressure monitoring component 400 and a flow pump unit 500. The pressure monitoring component 400 is used to monitor the pressure inside each sub-balloon body 211, and the flow pump unit 500 is used to individually control the filling or scaling of each sub-balloon body 211 according to the pressure feedback result of the pressure monitoring component 400. That is, the pressure monitoring component 400 and the flow pump unit 500 work together to achieve precise control of the specific overall deformation of the balloon assembly 200.

[0050] In this embodiment, in order to more accurately and intelligently control the deformation of the balloon assembly 200, the pressure monitoring component 400 includes a pressure sensor 410 and a signal processing unit 420. Figure 5 、 Figure 7 As shown, the pressure sensor 410 uses a high-precision, miniature annular pressure sensor chip. The pressure sensor chip is arranged at the connection position between each filling channel 110 and the sub-balloon body 211. Specifically, the pressure sensor chip is arranged at the filling medium inlet 212 of each sub-balloon body 211. Each pressure sensor 410 is connected to a transmission line 411 at the distal end. The transmission line 411 extends axially along the catheter 100 and passes through the catheter 100 at the proximal end of the catheter 100. After that, all the lines are wound into 48 cores and connected to the input end of the signal processing unit 420 from the proximal end of the catheter 100 to transmit the pressure signal to the signal processing unit 420. The output end of the signal processing unit 420 is connected to the flow pump unit 500. The signal processing unit 420 processes the pressure signal and controls the operation of the flow pump unit 500 based on the processing result. In order to ensure that each transmission line 411 can transmit the signal smoothly, the transmission line 411 is connected to the signal processing unit 420 at the proximal end of the catheter 100 using an aviation plug.

[0051] In this embodiment, in order to more conveniently control the deformation of each sub-balloon body 211, the flow pump unit 500 can select a group of flow pumps for joint control, and each flow pump is used to control a sub-balloon body 211 separately. Taking the plunger pump as an example, each plunger pump corresponds to a filling channel 110 and works independently. When the signal processing unit 420 issues a flow control instruction, it can directly and quickly control the motor of each plunger pump separately, adjust the stroke and reciprocating frequency of the plunger, and accurately realize the flow control of the corresponding sub-balloon body 211. Under this configuration, the filling and scaling operations of each sub-balloon body 211 do not interfere with each other, the response speed is faster, and it can more accurately meet the differentiated control requirements of different sub-balloon bodies 211 during the treatment of complex lesions.

[0052] Further, if Figure 1 、 Figure 6 As shown, the balloon units 210 at both ends of the balloon assembly 200 are conical in shape after being inflated, 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. This design helps the balloon assembly 200 to advance more smoothly within the blood vessel and reduce friction with the blood vessel wall.

[0053] like Figure 4 、 Figure 5 As shown, the balloon unit 210 located in the middle of the balloon assembly 200 is cylindrical in shape after being filled, which can provide a stable expansion force and fit the vascular lesion site. The sub-balloon body 211 in the middle balloon unit 210 is a fan-shaped structure, and all the fan-shaped sub-balloon bodies 211 have the same volume. The purpose of this design is that the fan-shaped sub-balloon bodies 211 with equal volume enable the flow control unit to use a unified control parameter standard for precise operation during the filling and scaling process. At the same time, it can also more conveniently calculate and control the filling medium flow required for each sub-balloon body 211 according to the preset treatment plan. By independently controlling each sub-balloon body 211, the overall shape and expansion degree of the balloon assembly 200 can be accurately adjusted. This standardized design simplifies the operation process, reduces the difficulty of surgical operation, and improves the controllability and safety of the operation.

[0054] Furthermore, in the balloon unit 210 located in the middle of the balloon assembly 200, 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. This design facilitates the folding of the balloon assembly 200. During the folding process, there is a certain amount of activity space and angular margin between the staggered sub-balloon bodies 211, which avoids mutual interference and obstruction. Each sub-balloon body 211 can adjust its position and shape more freely and successfully complete the folding action. At the same time, this design makes the balloon assembly 200 more evenly stressed during folding, 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 uses.

[0055] Furthermore, in order to ensure that after the delivery tube 600 is connected to the catheter 100, each filling channel 110 inside the catheter 100 is sealed to achieve locking and sealing, thereby preventing leakage of contrast agent and thus achieving accurate filling, expansion or pressure relief and contraction of each sub-balloon 211, the delivery tube 600 is connected to the catheter 100 via a connecting joint 700. Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 As shown, the connector 700 includes a first connector 710 for being fixedly mounted on the catheter 100, a second connector 720 for being fixedly connected to the delivery tube 600, and a third connector 730 for connecting the first connector 710 and the second connector 720. The second connector 720 includes the same number of extension tubes as the number of filling channels 110. When the extension tubes are connected to the delivery tube 600, each extension tube connects to each filling medium delivery channel in the delivery tube 600 and then docks with each filling channel 110 in the catheter 100. The second connector 720 and the third connector 730 are then docked and fixed together by the third connector 730. In this embodiment, the connector 700 can use an aviation plug that meets the requirements of use.

[0056] Specifically, during the surgical preparation phase, medical staff conduct a comprehensive inspection and debugging of the system. They confirm that the filling medium reservoir 300 contains sufficient filling medium. Furthermore, based on the patient's preoperative cerebral angiography, the system user interface inputs parameters such as the location of the diseased vessel, the degree of stenosis, and the vessel diameter. This determines the optimal expansion plan for the balloon assembly 200, including the combination of sub-balloons 211 to be filled and the target pressure for each sub-balloon 211.

[0057] After the operation begins, the medical staff inserts the catheter 100 into the patient's blood vessel along the guide wire. The guide wire guides the catheter 100 to move slowly along the blood vessel path until the balloon assembly 200 reaches the diseased intracranial artery stenosis site.

[0058] When the balloon assembly 200 reaches the predetermined position, the medical staff issues an expansion command to the signal processing unit 420 and inputs the expansion plan for the balloon assembly 200 into the signal processing unit 42. After receiving the command, the signal processing unit 420 confirms the preset expansion plan and sends a start command to the flow pump unit 500 based on the target pressure value for each daughter balloon 211. The flow pump unit 500 starts according to the command, draws filling medium from the filling medium storage unit 300, and delivers the contrast agent to the designated daughter balloon 211 through the corresponding filling channel 110 in the catheter 100.

[0059] During the inflation process, the pressure sensor 410 monitors the pressure changes within each daughter balloon 211 in real time and promptly feeds the pressure signal back to the signal processing unit 420 via the transmission line 411. The signal processing unit 420 analyzes and processes the pressure signal in real time. Through this real-time dynamic adjustment, it ensures that each daughter balloon 211 can accurately reach the target pressure value, allowing the balloon assembly 200 to form an expanded shape that adapts to the shape of the diseased blood vessel, effectively expanding the stenosis.

[0060] After the stenosis of the blood vessel is successfully expanded, the medical staff issues a scaling instruction to the signal processing unit 420 for the balloon assembly 200. The signal processing unit 420 controls the flow pump unit 500 to operate, and draws the filling medium in the sub-balloon body 211 back to the filling medium storage unit 300 through the filling channel 110. Similarly, during the scaling process, the pressure sensor 410 continuously monitors the pressure in the sub-balloon body 211, and the signal processing unit 420 adjusts the pumping flow of the flow pump unit 500 according to the pressure signal to ensure that the balloon assembly 200 is smoothly and completely deflated. Finally, the catheter 100 is safely removed from the patient's blood vessel, and the operation is completed.

[0061] It will be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0062] 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 system, characterized in that: include: a catheter (100); A balloon assembly (200), the balloon assembly (200) being arranged at a predetermined distance from the distal end of the catheter (100), the balloon assembly (200) comprising a plurality of rows of balloon units (210) arranged axially along the catheter (100), each balloon unit (210) comprising a plurality of sub-balloon bodies (211) arranged circumferentially around the catheter (100), each sub-balloon body (211) being configured to be independently inflated or deflated; A filling medium storage portion (300), the filling medium storage portion (300) being connected to the proximal end of the catheter (100) and used for providing a filling medium into each daughter balloon body (211); A flow control unit is connected to the filling medium storage unit (300) and is used to control the filling or expansion of each daughter balloon body (211) according to the pressure in the balloon assembly (200).

2. The matrix balloon dilatation system according to claim 1, characterized in that: A plurality of filling channels (110) are arranged axially in the catheter (100), and each sub-balloon body (211) is connected to at least one of the filling channels (110).

3. The matrix balloon dilatation system according to claim 2, characterized in that: The balloon units (210) located at both ends of the balloon assembly (200) are in a conical shape after being filled, and the balloon unit (210) located in the middle of the balloon assembly (200) is in a cylindrical shape after being filled.

4. The matrix balloon dilatation system according to claim 3, characterized in that: 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).

5. The matrix balloon dilatation system according to claim 3, characterized in that: Any one of the sub-balloon bodies (211) located in the middle of the balloon assembly (200) is fan-shaped.

6. The matrix balloon dilatation system according to claim 3, characterized in that: In the balloon unit (210) located in the middle of the balloon assembly (200), 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.

7. The matrix balloon dilatation system according to claim 2, characterized in that: The flow control unit includes a pressure monitoring component (400) and a flow pump unit (500). The pressure monitoring component (400) is used to monitor the pressure in each sub-balloon body (211). The flow pump unit (500) controls the filling or scaling of each sub-balloon body (211) individually according to the pressure feedback result of the pressure monitoring component (400).

8. The matrix balloon dilatation system according to claim 7, characterized in that: The pressure monitoring component (400) includes a pressure sensor (410) and a signal processing unit (420). The pressure sensor (410) is arranged at a connection position between each of the filling channels (110) and the sub-balloon body (211). The pressure sensor (410) is connected to the input end of the signal processing unit (420) for transmitting a pressure signal to the signal processing unit (420). The output end of the signal processing unit (420) is connected to the flow pump unit (500). The signal processing unit (420) processes the pressure signal and controls the operation of the flow pump unit (500) according to the processing result.

9. The matrix balloon dilatation system according to any one of claims 1 to 8, characterized in that: The balloon assembly (200) has 8 columns, and each column of the balloon units (210) has 6 sub-balloon bodies (211).

10. The matrix balloon dilatation system according to any one of claims 2 to 8, characterized in that: A guidewire channel (120) is provided in the middle of the catheter (100), and all the filling channels (110) are evenly arranged circumferentially around the guidewire channel (120).

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