A matrix balloon dilation system

Abstract

The application provides a matrix balloon expansion system, belonging 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 a position of the catheter close to a distal end at a set distance; the balloon assembly has multiple columns of balloon units arranged along the axial direction of the catheter; each balloon unit has multiple sub-balloon bodies arranged in the circumferential direction of the catheter; each sub-balloon body is used for independent inflation or deflation; the filling medium storage part is connected to the proximal end of the catheter and is used for providing filling medium into each sub-balloon body; the flow control part is connected to the filling medium storage part and is used for controlling the inflation or deflation of each sub-balloon body according to the pressure in the balloon assembly; and the system is mainly used for solving the technical problems that the shape of the whole balloon cannot be flexibly adjusted, normal blood vessels are easily damaged, and patients are obviously uncomfortable in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of balloon catheter technology, and specifically relates to a matrix balloon dilation system. Background Technology

[0002] Interventional treatment of intracranial vascular diseases is a minimally invasive therapy primarily used to treat intracranial aneurysms, cerebral vascular malformations, and cerebral artery stenosis. Methods such as intracranial vascular stenting, endovascular thrombectomy, and aspiration have brought significant therapeutic effects to numerous patients. During interventional treatment, when dealing with narrowed blood vessels, a balloon dilation catheter is typically used to pre-dilate the narrowed area.

[0003] Balloon dilatation catheters, as a key tool in endovascular angioplasty, have been widely used in percutaneous transluminal angioplasty and percutaneous transluminal coronary angioplasty. Currently, most commercially available balloon catheters employ a structure with a single dilatationable balloon at the distal end of the catheter. By inflating the balloon, the lesion in the blood vessel is opened, achieving the therapeutic goal.

[0004] However, existing balloon dilation catheters still have many shortcomings: when inflating, the balloon can only expand around the center axis, making it difficult to flexibly adjust its shape according to actual needs; the balloon is large in size, occupying too much non-lesion area during treatment; the large surface area of ​​the balloon after inflation leads to frequent friction with the vessel wall, which can easily damage normal blood vessels; at the same time, the large amount of fluid required for balloon inflation can cause patients to experience a strong feeling of distension and heaviness, resulting in significant discomfort.

[0005] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0006] The purpose of this invention is to provide a matrix balloon dilation system to solve the technical problems in the prior art, such as the inflexible adjustment of the overall inflation shape of the balloon, easy damage to normal blood vessels, and significant patient discomfort.

[0007] To achieve the above objectives, the matrix-type balloon dilation system of the present invention provides the following technical solution:

[0008] A matrix-type balloon dilation system, comprising:

[0009] catheter;

[0010] The balloon assembly is positioned at a predetermined distance from the distal end of the catheter. The balloon assembly has multiple rows of balloon units arranged along the axial direction of the catheter. Each balloon unit has multiple sub-balloons arranged circumferentially around the catheter. Each sub-balloon is used for individual inflation or deflation.

[0011] A filling medium storage unit, wherein the filling medium storage unit is connected to the proximal end of a conduit for providing filling medium into each sub-balloon;

[0012] A flow control unit, which is connected to an inflation medium storage unit, is used to control the inflation or deflation of each sub-balloon according to the pressure in the balloon assembly.

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

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

[0015] As a further optimized technical solution, the overall radial dimension of the balloon units at both ends gradually decreases from the balloon unit near the middle to the balloon unit away from the middle.

[0016] As a further optimized technical solution, any one of the sub-balloons 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, any two adjacent balloon units are offset by a set angle along the circumference, so that the sub-balloon bodies between any two adjacent balloon units are arranged in a circumferentially staggered manner.

[0018] As a further optimized technical solution, the flow control unit includes a pressure monitoring component and a flow pump unit. The pressure monitoring component is used to monitor the pressure inside each sub-balloon, and the flow pump unit controls the inflation or deflation of each sub-balloon individually based on the pressure feedback result from 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 set at the communication position between each filling channel and the sub-balloon body. The pressure sensor is connected to the input end of the signal processing unit to transmit 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 flow pump unit to operate according to the processing result.

[0020] As a further optimized technical solution, the balloon assembly has 8 rows, and each row of balloon units has 6 sub-balloons.

[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 around the guidewire channel in the circumference.

[0022] Beneficial effects:

[0023] The balloon assembly of this invention has multiple rows of balloon units arranged along the catheter axis. Each balloon unit has multiple individually inflatable or expandable sub-balloons arranged circumferentially around the catheter. That is, the sub-balloons are arranged in a matrix to form the overall balloon assembly. This design effectively breaks the traditional single inflation mode of balloons, thereby enabling the rational determination of complex lesion morphologies such as stenosis and malformation within the blood vessel based on the internal pressure feedback when each sub-balloon is inflated. Furthermore, it allows for the scientific planning of the inflation combination of the sub-balloons based on the pressure values ​​within the sub-balloons, and real-time adjustment of the three-dimensional structure of the balloon assembly. The contoured design allows for precise expansion of irregular lesions, targeting the affected area while minimizing impact on normal blood vessels. Compared to traditional large-volume balloons, this system allows for selective inflation of sub-balloons, effectively controlling the contact area between the balloon and the vessel wall, reducing friction and preventing damage to normal blood vessels. Furthermore, because the sub-balloons can be individually controlled and inflated as needed, the required amount of fluid is significantly reduced, significantly alleviating the patient's feeling of fullness and heaviness during treatment, improving the patient's treatment experience and comfort, and significantly enhancing the targeting and effectiveness of the treatment.

[0024] Furthermore, the flow control unit consists of a pressure monitoring component and a flow pump unit, which work together. The pressure monitoring component monitors the pressure of each sub-balloon in real time, and the flow pump unit controls the flow rate of the filling channel individually based on the pressure feedback, so as to achieve precise control of the inflation or deflation of the sub-balloons. Compared with traditional balloon dilation systems, this design can avoid balloon dilation shape deviation or local over-dilation caused by uneven pressure. It can flexibly and accurately shape the balloon according to the specific needs of different vascular lesions, improve the treatment effect while reducing the risk of damage to normal vascular tissue.

[0025] Furthermore, by designing the pressure monitoring component to include a pressure sensor and a signal processing unit, and clarifying their connection relationship and workflow, the pressure sensor is positioned at a key connection point, enabling it to acquire pressure data within each sub-balloon in real time and accurately, and transmit it to the signal processing unit promptly. After analyzing and processing the pressure signal, the signal processing unit precisely controls the operation of the flow pump unit, forming a complete closed-loop control system. This gives the balloon dilation system intelligent adjustment capabilities. Faced with complex and ever-changing vascular environments, the system can quickly respond and automatically adjust the inflation or deflation state of the sub-balloons, ensuring that the balloon maintains ideal pressure and shape throughout the dilation process. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein:

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

[0028] Figure 2 This is a schematic diagram of a cross-section 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 of the balloon assembly in one embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram from multiple perspectives of one of the balloon units located in the middle of the balloon assembly according to an 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 diagram of the structure of one of the sub-balloon bodies according to an embodiment of the present invention;

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

[0033] Figure 7 This is a schematic diagram of the inflation 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 a connector assembly according to an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of a first connector from multiple perspectives according to an embodiment of the present invention, wherein, Figure 9 (c) is the front view of the first connector. Figure 9 (a) is Figure 9 (c) Sectional view along the AA direction, Figure 9 (d) is the left view of the first connector. Figure 9 (b) is a perspective view of the first connector;

[0036] Figure 10 This is a schematic diagram of the second connector from multiple perspectives according to an embodiment of the present invention, wherein, Figure 10 (a) is the front view of the second connector. Figure 10 (b) is a left view of the second connector. Figure 10 (c) is a top view of the second connector. Figure 10 (d) is a perspective view of the second connector;

[0037] Figure 11 This is a schematic diagram of a third connector from multiple perspectives according to an embodiment of the present invention, wherein, Figure 11 (a) is a sectional view of the first connector along the axial direction. Figure 11 (b) is a perspective view of the third connector.

[0038] In the diagram: 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 connector; 720, second connector; 730, third connector. Detailed Implementation

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0040] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. Furthermore, the term "proximal end" uniformly refers to the end closer to the operator, while "distal end" refers to the end farther from the operator.

[0041] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0042] The shapes and sizes of the components in the accompanying drawings do not reflect the actual proportions of the product; they are only intended to illustrate the content of the invention.

[0043] This invention provides a matrix balloon dilation system, comprising a catheter 100, a balloon assembly 200, an inflation medium storage unit 300, and a flow control unit. The balloon assembly 200 is located near the distal end of the catheter 100 and consists of multiple rows of balloon units 210, each containing multiple individually inflatable and expandable sub-balloons 211. The inflation medium storage unit 300 connects to the proximal end of the catheter 100 and serves as the inflation / deflation 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 precisely controls the flow rate of the inflation channel based on pressure feedback, enabling individual inflation or expansion / contraction of the sub-balloons 211. This invention solves the problems of traditional balloon dilation catheters having unadjustable shapes, easily damaging normal blood vessels, and causing significant patient discomfort. It allows for flexible shaping according to vascular lesions, reducing the impact on normal blood vessels, decreasing the amount of fluid required, and alleviating patient discomfort, demonstrating promising clinical application prospects and widespread value.

[0044] Example 1

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

[0046] The catheter 100 serves as the delivery carrier for the balloon assembly 200, and has a guidewire channel 120 arranged coaxially inside for the guidewire to pass through and guide the catheter 100 to the lesion site. The guidewire channel 120 has multiple axially extending filling channels 110 evenly spaced around its circumference. The distal ends of the filling channels 110 are connected to the balloon assembly 200 and are used to allow filling medium to pass through to inflate or deflate the balloon assembly 200.

[0047] The balloon assembly 200 is positioned at a predetermined distance from the distal end of the catheter 100 to form a tip structure (commonly referred to as a "TIP") at the distal end of the catheter 100. This tip structure reduces resistance as the catheter 100 travels within the blood vessel, allowing it to smoothly traverse tortuous vessels along the guidewire and precisely reach the lesion site. The balloon assembly 200 comprises eight rows of balloon units 210 arranged axially along the catheter 100, each row of balloon units 210 containing six sub-balloon bodies 211 arranged circumferentially around the catheter 100. The balloon units 210 are numbered sequentially from the distal end to the proximal end of the catheter 100. The most distal one is the first row of balloon units 210, and the six sub-balloons 211 within 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 proximal one is the eighth row of balloon units 210, and the six sub-balloons 211 within the eighth row of balloon units 210 are numbered 8-1, 8-2, 8-3, 8-4, 8-5, 8-6. For the arrangement of the inflation channel 110, please refer to [reference needed]. Figure 2 , Figure 3 Each sub-balloon 211 is connected to an inflation channel 110. Specifically, the distal end of the inflation channel 110 extends into the interior of the sub-balloon 211 through a vertically outwardly bent connection port 111, thereby enabling the deformation of each sub-balloon 211 to be controlled individually.

[0048] The filling medium storage unit 300 is connected to the proximal end of the catheter 100 via the delivery tube 600 for supplying filling medium into each sub-balloon 211. In this embodiment, the filling medium is a contrast agent.

[0049] The flow control unit 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 211, and the flow pump unit 500 is used to individually control the inflation or deflation of each sub-balloon 211 based on the pressure feedback result from the pressure monitoring component 400. That is, the pressure monitoring component 400 and the flow pump unit 500 work together to achieve precise control over the overall deformation of the balloon assembly 200.

[0050] In this embodiment, to control the deformation of the balloon assembly 200 more accurately and intelligently, the pressure monitoring component 400 includes a pressure sensor 410 and a signal processing unit 420. For example... Figure 5 , Figure 7 As shown, the pressure sensor 410 uses a high-precision, miniature ring-shaped pressure sensing chip. The pressure sensing chip is located at the communication position between each filling channel 110 and the sub-balloon 211. Specifically, the pressure sensing chip is located at the filling medium inlet 212 of each sub-balloon 211. Each pressure sensor 410 is connected to a transmission line 411 at its distal end. The transmission line 411 extends axially along the conduit 100 and extends outward from the proximal end of the conduit 100. Then, 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 conduit 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 flow pump unit 500 to operate according to 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 conduit 100 using an aviation connector.

[0051] In this embodiment, to facilitate control of the deformation of each sub-balloon 211, the flow pump unit 500 can use a group of flow pumps for joint control, with each flow pump individually controlling one sub-balloon 211. Taking a plunger pump as an example, each plunger pump corresponds to an inflation channel 110 and operates independently. When the signal processing unit 420 issues a flow control command, it can directly and quickly control the motor of each plunger pump, adjusting the plunger's stroke and reciprocating frequency to precisely achieve flow control of the corresponding sub-balloon 211. With this configuration, the inflation and deflation operations of each sub-balloon 211 do not interfere with each other, resulting in a faster response speed and more accurately meeting the differentiated control requirements of different sub-balloons 211 during the treatment of complex lesions.

[0052] Furthermore, such as Figure 1 , Figure 6 As shown, the balloon units 210 located at both ends of the balloon assembly 200 are conical in shape after inflation, and the overall radial dimension of the balloon units 210 at both ends gradually decreases from the balloon unit 210 near the middle to the balloon unit 210 away from the middle. This design helps the balloon assembly 200 to advance more smoothly in the blood vessel and reduces 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, after inflation, takes on a cylindrical shape, providing stable expansion force and conforming to the vascular lesion site. The sub-balloons 211 within the middle balloon unit 210 have a fan-shaped structure, and all fan-shaped sub-balloons 211 have equal volumes. This design ensures that the equal-volume fan-shaped sub-balloons 211 allow the flow control unit to operate precisely using standardized control parameters during inflation and deflation. It also facilitates the calculation and control of the required inflation medium flow rate for each sub-balloon 211 based on a preset treatment plan. Through independent control of each sub-balloon 211, the overall shape and expansion degree of the balloon assembly 200 can be precisely adjusted. This standardized design simplifies the operation process, reduces the difficulty of surgical procedures, and improves the controllability and safety of the surgery.

[0054] Furthermore, in the balloon unit 210 located in the middle of the balloon assembly 200, any two adjacent balloon units 210 are offset by a set angle along the circumference, so that the sub-balloon bodies 211 between any two adjacent balloon units 210 are arranged in a staggered manner along the circumference. This design facilitates the folding of the balloon assembly 200. During the folding process, there is a certain amount of room for movement and angular margin between the staggered sub-balloon bodies 211, avoiding mutual interference and obstruction. Each sub-balloon body 211 can adjust its position and shape more freely, and smoothly complete the folding action. At the same time, this design makes the balloon assembly 200 more evenly stressed during folding, preventing damage to the balloon assembly 200 due to local stress concentration, and ensuring the integrity and reliability of the balloon assembly 200 during multiple folding uses.

[0055] Furthermore, to ensure that each filling channel 110 inside the catheter 100 is sealed and locked after the delivery tube 600 is connected to the catheter 100, preventing contrast agent leakage and thus achieving precise filling and expansion or depressurization and contraction of each sub-balloon 211, the delivery tube 600 and the catheter 100 are connected via a connecting joint 700. For example... Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown, the connector 700 has a first connector 710 for fixedly mounted on the conduit 100, a second connector 720 for fixedly connected to the delivery pipe 600, and a third connector 730 for connecting the first connector 710 and the second connector 720. The second connector 720 has extension tubes in the same number as the filling channels 110. When connected to the delivery pipe 600, each extension tube connects to each filling medium delivery channel within the delivery pipe 600, and then mates with each filling channel 110 within the conduit 100. Finally, the second connector 720 and the third connector 730 are fixed together by the third connector 730. In this embodiment, the connector 700 can be an aviation plug that meets the usage requirements.

[0056] Specifically, during the surgical procedure, firstly, in the surgical preparation phase, medical staff conduct a comprehensive inspection and debugging of the system. They confirm that the filling medium storage unit 300 has sufficient filling medium; simultaneously, based on the patient's preoperative cerebral angiography images, they input parameters such as the location, degree of stenosis, and diameter of the lesion vessel into the system operating interface to determine the optimal expansion plan for the balloon assembly 200, including the combination of sub-balloons 211 to be inflated and the target pressure value for each sub-balloon 211.

[0057] After the surgery 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 slowly along the blood vessel path until the balloon assembly 200 reaches the stenotic site of the intracranial artery.

[0058] Once the balloon assembly 200 reaches the predetermined position, medical personnel issue an inflation command to the signal processing unit 420 and input the inflation plan of the balloon assembly 200 into the signal processing unit 420. After receiving the command, the signal processing unit 420 confirms the preset inflation plan and sends a start command to the flow pump unit 500 according to the target pressure value of each sub-balloon 211. The flow pump unit 500 starts according to the command, extracts inflation media from the inflation media storage unit 300, and delivers contrast agent to the designated sub-balloon 211 through the corresponding inflation channel 110 in the catheter 100.

[0059] During inflation, pressure sensor 410 monitors the pressure changes within each sub-balloon 211 in real time and promptly feeds back the pressure signal to signal processing unit 420 via transmission line 411. Signal processing unit 420 analyzes and processes the pressure signal in real time. Through this real-time dynamic adjustment, it ensures that each sub-balloon 211 accurately reaches the target pressure value, enabling balloon assembly 200 to form an expansion shape that conforms to the shape of the diseased blood vessel, effectively opening the narrowed area.

[0060] After successful dilation of the narrowed blood vessel, medical staff issue a scaling command to the signal processing unit 420 for the balloon assembly 200. The signal processing unit 420 controls the flow pump unit 500 to pump the filling medium from the sub-balloon 211 back to the filling medium storage unit 300 through the filling channel 110. Similarly, during scaling, the pressure sensor 410 continuously monitors the pressure within the sub-balloon 211, and the signal processing unit 420 adjusts the pump flow rate based on the pressure signal to ensure smooth and complete contraction of the balloon assembly 200. Finally, the catheter 100 is safely removed from the patient's blood vessel, completing the procedure.

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

[0062] The above are merely 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 shall be within the scope of protection of the pending claims of the present invention.

Claims

1. A matrix-type balloon dilation system, characterized in that, include: Catheter (100); A balloon assembly (200) is positioned at a predetermined distance from the distal end of a catheter (100). The balloon assembly (200) has multiple rows of balloon units (210) arranged axially along the catheter (100). Each balloon unit (210) has multiple sub-balloon bodies (211) arranged circumferentially around the catheter (100). Each sub-balloon body (211) is used for individual inflation or deflation. In the balloon unit (210) located in the middle of the balloon assembly (200), any two adjacent balloon units (210) are offset circumferentially at a predetermined angle so that the sub-balloon bodies (211) between any two adjacent balloon units (210) are staggered circumferentially. A filling medium storage unit (300) is connected to the proximal end of a conduit (100) for supplying filling medium into each sub-balloon (211); A flow control unit, which is connected to an inflation medium storage unit (300), is used to control the inflation or deflation of each sub-balloon (211) according to the pressure in the balloon assembly (200).

2. The matrix-type balloon dilation system according to claim 1, characterized in that, The catheter (100) has multiple filling channels (110) arranged axially inside, and each sub-balloon (211) is connected to at least one of the filling channels (110).

3. The matrix-type balloon dilation system according to claim 2, characterized in that, The balloon units (210) located at both ends of the balloon assembly (200) are conical when inflated, and the balloon unit (210) located in the middle of the balloon assembly (200) is cylindrical when inflated.

4. The matrix-type balloon dilation system according to claim 3, characterized in that, The overall radial dimension of the balloon unit (210) at both ends gradually decreases from the balloon unit (210) near the middle to the balloon unit (210) away from the middle.

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

6. The matrix-type balloon dilation 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 inside each sub-balloon (211), and the flow pump unit (500) controls the inflation or deflation of each sub-balloon (211) individually based on the pressure feedback result of the pressure monitoring component (400).

7. The matrix-type balloon dilation system according to claim 6, characterized in that, The pressure monitoring component (400) includes a pressure sensor (410) and a signal processing unit (420). The pressure sensor (410) is located at the communication position between each filling channel (110) and the sub-balloon body (211). The pressure sensor (410) is connected to the input end of the signal processing unit (420) 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 flow pump unit (500) to operate according to the processing result.

8. The matrix-type balloon dilation system according to any one of claims 1-7, characterized in that, The balloon assembly (200) has 8 rows, and each row of balloon units (210) has 6 sub-balloon bodies (211).

9. The matrix-type balloon dilation system according to any one of claims 2-7, characterized in that, The catheter (100) has a guidewire channel (120) in the middle, and all the filling channels (110) are evenly arranged around the guidewire channel (120).

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