Counter-pulsation balloon catheter and counter-pulsation balloon catheter system

Abstract

The invention provides a counterpulsation balloon catheter and a counterpulsation balloon catheter system. The counterpulsation balloon catheter comprises a catheter body, a balloon and an exhaust regulator. The catheter is provided with a liquid filling cavity and an exhaust cavity, and the balloon is respectively communicated with the liquid filling cavity and the exhaust cavity; the exhaust regulator is arranged in an area, extending out of the body, of the exhaust cavity and has an exhaust state and a blocking state; when the exhaust regulator is in the exhaust state, the exhaust cavity is allowed to be communicated with the external atmosphere; when the exhaust regulator is in the blocked state, the exhaust cavity is sealed, so that the exhaust cavity is isolated from the external atmosphere; the balloon is configured in the mode that when the exhaust regulator is in the exhaust state, the liquid filling cavity is filled with filling liquid, and gas is exhausted from the exhaust cavity. When the exhaust regulator is in the blocking state, the liquid filling cavity is filled with filling liquid to achieve expansion or the filling liquid is pumped out to achieve contraction.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to an anti - pulsation balloon catheter and an anti - pulsation balloon catheter system. Background Art

[0002] The blockage of the coronary artery may cause local ischemic injury to a part of the myocardium. Myocardial ischemia mainly affects the microcirculation system of the coronary artery. The abnormality of the microcirculation system causes a part of the myocardium to enter a state of hibernation, suspended animation or even death, thus triggering a serious acute myocardial infarction. The treatment method for insufficient perfusion of the microcirculation system is to block the blood flow in the venous sinus, increase the blood vessel pressure, and make the blood flow back to perfuse into the microcirculation system. And due to the increase in pressure, the refluxed blood also plays a role in flushing.

[0003] The anti - pulsation balloon catheter system is a current method for treating microcirculation obstruction. This method places the balloon of the anti - pulsation balloon catheter in the coronary sinus, and through the anti - pulsation device, the balloon is repeatedly inflated and deflated in adaptation to the heart rhythm, intermittently blocking the venous sinus to achieve the effect of driving blood reflux and flushing.

[0004] After the anti - pulsation balloon catheter is implanted, the volume of the gas existing in its medium passage will expand and contract as the pressure changes. Therefore, the amount of gas in the medium passage seriously affects the control of the balloon volume by the anti - pulsation device, and if the balloon accidentally ruptures, the gas overflowing into the blood vessel will pose a potential risk of air embolism.

[0005] In the prior art, only the exhaust at the anti - pulsation device is considered, and it is difficult to fully remove the gas trapped at the distal balloon. Summary of the Invention

[0006] The purpose of the present invention is to provide an anti - pulsation balloon catheter and an anti - pulsation balloon catheter system to solve the problem that it is difficult to remove the gas trapped at the distal end of the existing anti - pulsation balloon catheter.

[0007] To solve the above - mentioned technical problems, the present invention provides an anti - pulsation balloon catheter, which includes a catheter, a balloon, and an exhaust regulator; The catheter has a liquid - filling cavity and an exhaust cavity, and the balloon is respectively communicated with the liquid - filling cavity and the exhaust cavity; The exhaust regulator is arranged in the area where the exhaust cavity extends out of the body, and has an exhaust state and a blocking state; when the exhaust regulator is in the exhaust state, it allows the exhaust cavity to communicate with the external atmosphere; when the exhaust regulator is in the blocking state, it forms a seal for the exhaust cavity to isolate it from the external atmosphere; The balloon is configured to be filled with a filling liquid from the liquid filling chamber and discharge gas from the exhaust chamber when the exhaust regulator is in the exhaust state; when the exhaust regulator is in the blocking state, it is expanded by filling the filling liquid through the liquid filling chamber or contracted by extracting the filling liquid.

[0008] Optionally, the exhaust regulator further has an acceleration state; when the exhaust regulator is in the acceleration state, the exhaust chamber forms a second communication different from that inside the balloon with the liquid filling chamber through the exhaust regulator; The balloon is configured to be expanded by filling the filling liquid through the liquid filling chamber and the exhaust chamber or contracted by extracting the filling liquid when the exhaust regulator is in the acceleration state.

[0009] Optionally, the catheter has a connection port extending out of the body, and the liquid filling chamber and the exhaust chamber respectively have a first opening and a second opening formed on the connection port; the exhaust regulator is movably arranged on the connection port; When the exhaust regulator moves along the connection port to the first position, the second opening is exposed, and the exhaust regulator is in the exhaust state; When the exhaust regulator moves along the connection port to the second position, the second opening is blocked, and the exhaust regulator is in the blocking state; When the exhaust regulator moves along the connection port to the third position, the second opening communicates with the first opening through the exhaust regulator, and the exhaust regulator is in the acceleration state.

[0010] Optionally, the first opening is axially formed along the connection port, and the second opening is radially formed on the outer wall of the connection port; the exhaust regulator includes an annular member and a sealing member arranged inside the annular member, and the annular member is movably sleeved on the connection port through the sealing member and is hermetically connected to the outer wall of the connection port; when the sealing member covers the second opening, the exhaust regulator is in the second position.

[0011] Optionally, the first position, the second position, and the third position are arranged in sequence from the proximal end to the distal end along the axis of the connection port.

[0012] Optionally, the liquid filling chamber and the exhaust chamber are arranged side by side along the axis of the connection port.

[0013] Optionally, the liquid filling chamber and the exhaust chamber are arranged side by side or coaxially inside and outside in the catheter; or the catheter includes independent liquid filling branch pipes and exhaust branch pipes, and the liquid filling chamber and the exhaust chamber are respectively formed in the liquid filling branch pipes and the exhaust branch pipes.

[0014] Optionally, the liquid filling cavity communicates with the proximal region of the balloon; the exhaust cavity communicates with the distal region of the balloon.

[0015] Optionally, the catheter is used to define that a part of the exhaust cavity extends into the distal region of the balloon and is open in the distal region of the balloon, so that the exhaust cavity communicates with the balloon; alternatively, the catheter is used to define that a part of the exhaust cavity extends into the distal region of the balloon and is connected to the distal end of the balloon, and the exhaust cavity communicates with the balloon through a communication hole opened on the side wall of the catheter.

[0016] To solve the above technical problems, the present invention further provides an intra-aortic balloon pump catheter system, which includes: an intra-aortic balloon pump device and the intra-aortic balloon pump catheter as described above; the intra-aortic balloon pump device is connected to the catheter and is used to fill or extract the filling liquid through the catheter.

[0017] In summary, in the intra-aortic balloon pump catheter and the intra-aortic balloon pump catheter system provided by the present invention, the intra-aortic balloon pump catheter includes a catheter, a balloon, and an exhaust regulator; the catheter has a liquid filling cavity and an exhaust cavity, and the balloon communicates with the liquid filling cavity and the exhaust cavity respectively; the exhaust regulator is arranged in the region where the exhaust cavity extends out of the body and has an exhaust state and a blocking state; when the exhaust regulator is in the exhaust state, it allows the exhaust cavity to communicate with the external atmosphere; when the exhaust regulator is in the blocking state, it seals the exhaust cavity to isolate it from the external atmosphere; the balloon is configured to, when the exhaust regulator is in the exhaust state, be filled with the filling liquid from the liquid filling cavity and discharge the gas from the exhaust cavity; when the exhaust regulator is in the blocking state, expand or contract by filling or extracting the filling liquid through the liquid filling cavity.

[0018] With such a configuration, through the setting of the exhaust cavity, the gas in the distal balloon can be effectively discharged, improving the accuracy of balloon control and the safety of use. Further, through the setting of the exhaust regulator, the processes of exhaust and filling can be effectively controlled, realizing effective control in different working states and linkage with the intra-aortic balloon pump device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Those of ordinary skill in the art will understand that the provided drawings are used to better understand the present invention and do not constitute any limitation to the scope of the present invention.

[0020] Figure 1 is a schematic diagram of an intra-aortic balloon pump catheter system.

[0021] Figure 2 is a schematic diagram of the intra-aortic balloon pump catheter according to an embodiment of the present invention.

[0022] Figure 3It is a schematic diagram of the exhaust process of the counterpulsation balloon catheter according to an embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the exhaust regulator in the exhaust state according to an embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram of the exhaust regulator in the blocked state according to an embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the exhaust regulator in the acceleration state according to an embodiment of the present invention.

[0026] Figure 7a It is a schematic diagram of the exhaust regulator in the exhaust state according to another embodiment of the present invention.

[0027] Figure 7b It is a schematic diagram of the exhaust regulator in the blocked state according to another embodiment of the present invention.

[0028] Figure 7c It is a schematic diagram of the exhaust regulator in the acceleration state according to another embodiment of the present invention.

[0029] Figure 8 It is a schematic diagram of the catheter arranged in a double - chamber side - by - side manner according to an embodiment of the present invention.

[0030] Figure 9 It is a schematic diagram of the catheter arranged in a double - chamber coaxial inner - outer manner according to an embodiment of the present invention.

[0031] Figure 10 It is a schematic diagram of the catheter including two independent branch pipes according to an embodiment of the present invention.

[0032] In the drawings: 01 - counterpulsation balloon catheter; 02 - counterpulsation device; 03 - catheter; 04 - balloon; 05 - exhaust device; 10 - catheter; 11 - liquid - filling chamber; 110 - first opening; 12 - exhaust chamber; 120 - second opening; 13 - connection port; 14 - liquid - filling branch pipe; 15 - exhaust branch pipe; 16 - communication hole; 17 - guide wire chamber; 20 - balloon; 30 - exhaust regulator; 31 - annular member; 32 - seal. Detailed implementation manners

[0033] To make the objectives, advantages, and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are in a very simplified form and not drawn to scale, only for facilitating and clearly assisting in explaining the objectives of the embodiments of the present invention. In addition, the structures shown in the drawings are often part of the actual structures. In particular, the emphasis to be shown in each drawing is different, and sometimes different scales are used.

[0034] As used in the present invention, the singular forms "a", "an", "one" and "the" include plural referents, the term "or" is generally used in the sense of including "and / or", the term "several" is generally used in the sense of including "at least one", the term "at least two" is generally used in the sense of including "two or more". In addition, the terms "first", "second", "third" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", "third" may explicitly or implicitly include one or at least two of such features. "One end" and "the other end", as well as "proximal end" and "distal end" generally refer to two corresponding parts, which include not only the endpoints. The terms "proximal end" and "distal end" are defined herein with respect to an intra-aortic balloon catheter that has one end for insertion into the human body and a control end extending outside the body. The term "proximal end" refers to a position closer to the control end of the intra-aortic balloon catheter extending outside the body, and the term "distal end" refers to a position closer to the end of the intra-aortic balloon catheter inserted into the human body and thus farther from the control end of the intra-aortic balloon catheter. Optionally, in a manual or hand-operated application scenario, the terms "proximal end" and "distal end" are defined herein with respect to an operator such as a surgeon or clinician. The term "proximal end" refers to a position closer to the operator, and the term "distal end" refers to a position closer to the intra-aortic balloon catheter and thus farther from the operator. In addition, as used in the present invention, "mounted", "connected", "coupled", an element "disposed" on another element should be understood in a broad sense, generally only indicating that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the two elements can be directly or indirectly connected, coupled, cooperated or transmitted through an intermediate element, rather than being construed as indicating or implying a spatial position relationship between the two elements, that is, an element can be in any position such as inside, outside, above, below or on one side of another element, unless the content clearly indicates otherwise. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, directional terms such as above, below, up, down, upward, downward, left, right, etc. are used with respect to exemplary embodiments as shown in the figures, with the upward or upper direction towards the top of the corresponding figure and the downward or lower direction towards the bottom of the corresponding figure.

[0035] The object of the present invention is to provide an intra-aortic balloon catheter and an intra-aortic balloon catheter system to solve the problem that it is difficult to remove the trapped gas at the distal end of the existing intra-aortic balloon catheter. The following is a description with reference to the accompanying drawings.

[0036] Please refer to Figure 1, which shows a counterpulsation balloon catheter system, including a counterpulsation balloon catheter 01 and a counterpulsation device 02, wherein the counterpulsation balloon catheter 01 includes a catheter 03 and a device located at the distal end of the catheter 03 ( Figure 1 In application, the distal end of the counterpulsation balloon catheter 01 is used to be delivered to a predetermined part of the heart, such as the coronary sinus region, through vascular intervention, and the proximal end of the catheter 03 ( Figure 1 The right end of the balloon 04 extends out of the body and is connected to the counterpulsation device 02. The counterpulsation device 02 is used to fill the balloon 04 with a filling liquid (such as saline solution, etc.) or extract the filling liquid through the catheter 03, so as to control the expansion or contraction of the balloon 04. It can be understood that, in an ideal state, when the balloon 04 and the catheter 03 are filled with the filling liquid, the counterpulsation device 02 can accurately control the expansion and contraction of the balloon 04 by driving the filling or extraction of the filling liquid. The expansion and contraction of the balloon 04 is adapted to the counterpulsation demand, that is, according to the rhythm of the heart, the blood flow of the coronary sinus is intermittently blocked, thereby achieving the purpose of controlling the intermittent increase and decrease of the blood pressure of the coronary sinus.

[0037] After the counterpulsation balloon catheter 01 is inserted and delivered into place with the balloon 04 , the catheter 03 and the balloon 04 need to be vented first. Figure 1 In the counterpulsation balloon catheter system shown, the counterpulsation device 02 includes an exhaust device 05, which can exhaust the counterpulsation balloon catheter 01. However, due to the location of the exhaust device 05, the exhaust effect of the exhaust device 05 is better for the proximal part of the catheter 03, but the exhaust effect of the distal part of the catheter 03 and the balloon 04 is poor, and some gas is easily trapped at the distal end of the counterpulsation balloon catheter 01 and is difficult to be discharged.

[0038] Please refer to Figure 2 and Figure 3 In order to solve the above technical problems, the present invention provides a counterpulsation balloon catheter, which includes: a catheter 10, a balloon 20 and an exhaust regulator 30; the catheter 10 has a liquid filling chamber 11 and an exhaust chamber 12, and the balloon 20 is connected to the liquid filling chamber 11 and the exhaust chamber 12 respectively; the exhaust regulator 30 is arranged in the area where the exhaust chamber 12 extends out of the body, and has an exhaust state and a blocking state; when the exhaust regulator 30 is in the exhaust state, the exhaust chamber 12 is allowed to communicate with the external atmosphere; when the exhaust regulator 30 is in the blocking state, the exhaust chamber 12 is sealed to isolate it from the external atmosphere; the balloon 20 is configured to, when the exhaust regulator 30 is in the exhaust state, fill the liquid filling chamber 11 with filling liquid and exhaust gas from the exhaust chamber 12; when the exhaust regulator 30 is in the blocking state, the filling chamber 11 is filled with filling liquid to achieve expansion or the filling liquid is extracted to achieve contraction.

[0039] In this embodiment, the catheter 10 of the counterpulsation balloon catheter includes an independent liquid filling cavity 11 and an exhaust cavity 12, and both the liquid filling cavity 11 and the exhaust cavity 12 extend distally to communicate with the balloon 20. The proximal end of the liquid filling cavity 11 is used to connect to the counterpulsation device. Thus, during exhaust, the liquid filling cavity 11 can be filled with the filling liquid, and at the same time, the exhaust cavity 12 is used to discharge the gas (the flow directions of the filling liquid and the gas are as shown by the arrows in Figure 3 ), effectively exhausting the gas in the distal balloon 20, improving the accuracy of balloon 20 control and the safety of use.

[0040] Furthermore, through the setting of the exhaust regulator 30, the processes of exhaust and filling can be effectively controlled. Specifically, during the exhaust process, the exhaust regulator 30 is configured in the exhaust state, and the exhaust cavity 12 communicates with the external atmosphere outside the body. When switching to the usage process after the exhaust is completed, the exhaust regulator 30 can be configured in the blocking state, thereby sealing the exhaust cavity 12 and isolating it from the external atmosphere, ensuring that the balloon 20 can be quickly and accurately controlled for inflation and deflation through the liquid filling cavity 11, achieving effective control in different working states and linkage with the counterpulsation device.

[0041] Please refer to Figures 3 to 6 , optionally, the catheter 10 has a connection port 13 extending outside the body, and the liquid filling cavity 11 and the exhaust cavity 12 respectively have a first opening 110 and a second opening 120 opened on the connection port 13; the exhaust regulator 30 is movably arranged on the connection port 13; when the exhaust regulator 30 moves along the connection port 13 to the first position (refer to the position shown in Figure 4 ), the second opening 120 is exposed, and the exhaust regulator 30 is in the exhaust state; when the exhaust regulator 30 moves along the connection port 13 to the second position (refer to the position shown in Figure 5 ), the second opening 120 is blocked, and the exhaust regulator 30 is in the blocking state.

[0042] In an alternative exemplary embodiment, the liquid filling cavity 11 and the exhaust cavity 12 are arranged side by side along the axial direction of the connection port 13, the first opening 110 is opened along the axial direction of the connection port 13, and the second opening 120 is opened radially on the outer wall of the connection port 13 along the connection port 13; the exhaust regulator 30 includes an annular member 31 and a sealing member 32 arranged inside the annular member 31, and the annular member 31 is movably sleeved on the connection port 13 through the sealing member 32 and is hermetically connected to the outer wall of the connection port 13; when the sealing member 32 covers the second opening 120, the exhaust regulator 30 is in the second position.

[0043] In Figure 4 andFigure 5 In the illustrated exemplary embodiment, the exhaust regulator 30 is a sliding device sleeved outside the connection port 13. By moving along the connection port 13, it can cover and block the second opening 120 or expose the second opening 120. Optionally, the movement mode of the exhaust regulator 30 is translational along the axial direction of the connection port 13, and the first position is located on the proximal side of the second position. Please refer to Figure 4 , which shows that the exhaust regulator 30 is in the first position (proximal position), and the second opening 120 is exposed. At this time, the exhaust chamber 12 is in communication with the external atmosphere through the exposed second opening 120, and exhaust can be carried out. It can be understood that during exhaust, if it is found that the filling liquid emerges from the second opening 120, it can be considered that the exhaust is basically completed at this time.

[0044] Please refer to Figure 5 , when the exhaust regulator 30 moves distally to the second position, the seal 32 covers the second opening 120, and the exhaust chamber 12 is sealed. At this time, when the balloon 20 is inflated and deflated through the liquid filling chamber 11, the filling liquid will not leak from the second opening 120. Optionally, the seal 32 for sealing the second opening 120 needs to withstand a pressure of not less than 3 atm without failure to ensure the sealing reliability during the inflation and deflation of the balloon 20. Optionally, a Luer connector can be provided at the proximal end of the annular member 31, which is used to connect to the counterpulsation device, so that the liquid filling chamber 11 can be conveniently connected to the counterpulsation device.

[0045] Please refer to Figure 6, Further optionally, the exhaust regulator 30 further has an acceleration state; when the exhaust regulator 30 is in the acceleration state, the exhaust chamber 12 forms a second communication with the liquid filling chamber 11 through the exhaust regulator 30, which is different from that inside the balloon 20; the balloon 20 is configured to be inflated by filling the liquid filling chamber 11 and the exhaust chamber 12 with the filling liquid or deflated by extracting the filling liquid when the exhaust regulator 30 is in the acceleration state. In some embodiments, in addition to being able to switch between the exhaust state and the blocking state, the exhaust regulator 30 can also be switched to the acceleration state. When the exhaust regulator 30 is in the acceleration state, the exhaust chamber 12 and the liquid filling chamber 11 are connected through the exhaust regulator 30 at the proximal end. In this way, the exhaust chamber 12 and the liquid filling chamber 11 actually form two parallel paths, which can be used together in the filling or extraction process of the filling liquid. The exhaust chamber 12 is equivalent to increasing the flow cross-sectional area of the filling liquid, so the effect of accelerating filling or extraction can be achieved. It can be understood that the exhaust process may only need to be performed once or a limited number of times after the entire counterpulsation balloon catheter is inserted and delivered. After the exhaust is completed and the exhaust regulator 30 is switched to the blocking state, the exhaust chamber 12 is actually idle. By setting the exhaust regulator 30 to be switched to the acceleration state, the exhaust chamber 12 can be reused as a flow channel for the filling liquid, improving the cross-sectional utilization rate of the entire catheter 10. Under certain conditions, the cross-sectional area of the catheter 10 can be reduced, and the passing performance of the catheter 10 can be improved.

[0046] Optionally, when the exhaust regulator 30 is moved along the connection port 13 to the third position, the second opening 120 communicates with the first opening 110 through the exhaust regulator 30, and the exhaust regulator 30 is in the acceleration state. In Figure 6 the exemplary example shown, the third position is located on the distal side of the second position, that is, the first position, the second position, and the third position are arranged in sequence from proximal to distal along the axial direction of the connection port 13. When the exhaust regulator 30 moves from Figure 5 the second position to the third position further distally, the seal 32 passes over the second opening 120, and the second opening 120 is exposed inside the annular member 31 and communicates with the first opening 110 through the inner space of the annular member 31.

[0047] It should be noted that Figures 4 to 6The exemplary examples shown are merely one example of the cooperation between the exhaust regulator 30 and the connection port 13, rather than a limitation on the exhaust regulator 30 and the connection port 13. In an alternative example, the exhaust regulator 30 can be configured to rotate circumferentially around the connection port 13, so as to switch between the first position, the second position, and the third position. That is, the exhaust regulator 30 is not limited to moving axially along the connection port 13. It can also be achieved by circumferential rotation to expose, block, and connect the second opening 120.

[0048] Furthermore, the opening directions of the first opening 110 and the second opening 120 on the connection port 13 are not limited to those Figures 4 to 6 shown. Please refer to Figures 7a to 7c . In another alternative example, the first opening 110 and the second opening 120 are arranged at 90° on the connection port 13, and the exhaust regulator 30 is configured to be rotatably arranged around the extension intersection point of the first opening 110 and the second opening 120, forming a form similar to a three-way valve. At this time, the first position, the second position, and the third position refer to different rotation angles of the exhaust regulator 30. Figures 7a to 7c In [reference], the pipeline on the left side of the exhaust regulator 30 is connected to the external atmosphere, and the pipeline below the connection port 13 is connected to the counterpulsation device. It can be understood that Figure 7a as shown, the exhaust regulator 30 is in the first position, and the exhaust cavity 12 is connected to the external atmosphere through the second opening 120, and it is in the exhaust state. Figure 7b As shown, the exhaust regulator 30 is in the second position, and the second opening 120 is sealed and blocked by the exhaust regulator 30, and it is in the blocking state. Figure 7c As shown, the exhaust regulator 30 is in the third position, and the second opening 120 is connected to the first opening 110 through the exhaust regulator 30, and it is in the acceleration state.

[0049] Please refer to Figures 8 to 10 . The liquid filling cavity 11 and the exhaust cavity 12 are arranged in parallel or coaxially inside and outside in the catheter 10; or the catheter 10 includes independent liquid filling branch pipes 14 and exhaust branch pipes 15, and the liquid filling cavity 11 and the exhaust cavity 12 are respectively formed in the liquid filling branch pipes 14 and the exhaust branch pipes 15. In some embodiments, the catheter 10 can be a double-chamber tube including the liquid filling cavity 11 and the exhaust cavity 12. Optionally, the catheter 10 can also include other lumens (such as a guide wire lumen) to form a multi-chamber tube. In the cross-sectional arrangement of the double-chamber or multi-chamber tube, the liquid filling cavity 11 and the exhaust cavity 12 can be arranged in parallel or coaxially inside and outside. In other embodiments, the liquid filling cavity 11 and the exhaust cavity 12 can be respectively formed in the liquid filling branch pipes 14 and the exhaust branch pipes 15, that is, the catheter 10 includes two independent branch pipes, and each branch pipe can be a single-chamber tube or a multi-chamber tube including other channels.

[0050] Preferably, the liquid filling cavity 11 communicates with the proximal region of the balloon 20; the exhaust cavity 12 communicates with the distal region of the balloon 20. The balloon 20 has a certain length in the axial direction of the catheter 10. For example, in one exemplary embodiment, the axial length of the balloon 20 along the catheter 10 can be 10 mm to 25 mm. Within the axial length range of the balloon 20, the region of its proximal 30% can be referred to as the proximal region, and the region of its distal 30% can be referred to as the distal region. Thus, arranging the communication ports of the liquid filling cavity 11 and the exhaust cavity 12 in the balloon 20 in the proximal region and the distal region respectively is conducive to gas-liquid separation during exhaust and facilitates exhausting air.

[0051] In some embodiments, the part of the catheter 10 that defines the exhaust cavity 12 extends into the distal region of the balloon 20 and opens in the distal region of the balloon 20, so that the exhaust cavity 12 communicates with the balloon 20. The part of the catheter 10 that defines the exhaust cavity 12 can be, for example, the exhaust branch pipe 15 (as Figure 2 shown), a part of the catheter 10 (in a side-by-side arrangement form), or the entire catheter 10 (in a coaxial inner and outer arrangement form). It can be understood that at this time, the part of the catheter 10 that defines the exhaust cavity 12 may not contact the distal end of the balloon 20, but only extend into the distal region inside the balloon 20 and open.

[0052] In other embodiments, the part of the catheter 10 that defines the exhaust cavity 12 extends into the distal region of the balloon 20 and is connected to the distal end of the balloon 20, and the exhaust cavity 12 communicates with the balloon 20 through a communication hole 16 opened on the side wall of the catheter 10. In other embodiments, the part of the catheter 10 that defines the exhaust cavity 12 can be connected to the distal end of the balloon 20, such as by welding. At this time, the exhaust cavity 12 can communicate with the balloon 20 through the communication hole 16 opened on the side wall of the catheter 10 (as Figures 8 to 10 shown). It should be noted that the opening position of the communication hole 16 here should be in the distal region of the balloon 20.

[0053] Optionally, the liquid filling cavity 11 directly communicates with the proximal end of the balloon 20, that is, the part of the catheter 10 that defines the liquid filling cavity 11 (such as the liquid filling branch pipe 14) may not extend into the inside of the balloon 20, but directly communicate with the balloon 20 at the proximal end of the balloon 20.

[0054] Optionally, the catheter 10 further includes a guide wire cavity 17, which can be used as a guide wire channel during interventional delivery for guiding the guide wire to penetrate, and its inner cavity can be compatible with guide wires of 0.018 in to 0.038 in. During the application process after implantation, the guide wire cavity 17 can also be used for pressure detection. Its interior is filled with liquid (such as blood or normal saline), and the proximal end of the guide wire cavity 17 extending out of the body can be connected to a pressure sensor to facilitate monitoring of the venous sinus blood pressure.

[0055] To solve the above technical problems, the present invention further provides an anti - pulsation balloon catheter system, which includes: an anti - pulsation device and the anti - pulsation balloon catheter as described above; the anti - pulsation device is connected to the catheter 10 for filling or extracting the filling liquid through the catheter 10.

[0056] Optionally, the anti - pulsation device has a charging and discharging driving part. The power source of the charging and discharging driving part can be selected from compressed air, oil pressure, electricity, etc. The specific driving structure of the charging and discharging driving part can adopt an air pump, an engine, a motor, etc. to achieve the filling or suction of the filling liquid. The specific structure and principle of the anti - pulsation device can refer to the prior art and will not be elaborated here.

[0057] In summary, in the anti - pulsation balloon catheter and the anti - pulsation balloon catheter system provided by the present invention, the anti - pulsation balloon catheter includes a catheter, a balloon, and an exhaust regulator; the catheter has a liquid - filling cavity and an exhaust cavity, and the balloon is respectively communicated with the liquid - filling cavity and the exhaust cavity; the exhaust regulator is arranged in the area where the exhaust cavity extends out of the body and has an exhaust state and a blocking state; when the exhaust regulator is in the exhaust state, it allows the exhaust cavity to communicate with the external atmosphere; when the exhaust regulator is in the blocking state, it seals the exhaust cavity to isolate it from the external atmosphere; the balloon is configured to, when the exhaust regulator is in the exhaust state, be filled with the filling liquid from the liquid - filling cavity and discharge the gas from the exhaust cavity; when the exhaust regulator is in the blocking state, be filled with the filling liquid through the liquid - filling cavity to achieve expansion or extract the filling liquid to achieve contraction. With such a configuration, through the setting of the exhaust cavity, the gas in the distal balloon can be effectively excluded, improving the accuracy of balloon control and the safety of use. Further, through the setting of the exhaust regulator, the processes of exhaust and filling can be effectively controlled, achieving effective control in different working states and linkage with the anti - pulsation device.

[0058] It should be noted that the above - mentioned several embodiments can be combined with each other. The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the technical field of the present invention based on the above disclosure belong to the protection scope of the present invention.

Claims

1. A counterpulsation balloon catheter, characterized in that: including a catheter, a balloon, and an exhaust regulator; The catheter has a liquid filling cavity and an exhaust cavity, and the balloon is communicated with the liquid filling cavity and the exhaust cavity respectively; The exhaust regulator is arranged in the area where the exhaust cavity extends out of the body, and has an exhaust state and a blocking state; when the exhaust regulator is in the exhaust state, the exhaust cavity is allowed to communicate with the external atmosphere; when the exhaust regulator is in the blocking state, the exhaust cavity is sealed to isolate it from the external atmosphere; The balloon is configured such that, when the exhaust regulator is in the exhaust state, the filling liquid is filled into the filling cavity and gas is discharged from the exhaust cavity; when the exhaust regulator is in the blocking state, the filling liquid is filled into the filling cavity to achieve expansion or the filling liquid is extracted to achieve contraction.

2. The counterpulsation balloon catheter according to claim 1, characterized in that: The exhaust regulator also has an acceleration state; when the exhaust regulator is in the acceleration state, the exhaust chamber is connected to the liquid filling chamber through the exhaust regulator to form a second connection different from the inside of the balloon; The balloon is configured to expand by filling the filling liquid into the filling chamber and the exhaust chamber or to contract by extracting the filling liquid when the exhaust regulator is in the accelerated state.

3. The counterpulsation balloon catheter according to claim 1, characterized in that: The conduit has a connection port extending out of the body, the liquid filling chamber and the exhaust chamber have a first opening and a second opening respectively opened on the connection port; the exhaust regulator is movably arranged on the connection port; When the exhaust regulator moves to the first position along the connection port, the second opening is exposed, and the exhaust regulator is in the exhaust state; When the exhaust regulator moves to the second position along the connection port, the second opening is blocked, and the exhaust regulator is in the blocking state; When the exhaust regulator moves to the third position along the connection port, the second opening is communicated with the first opening through the exhaust regulator, and the exhaust regulator is in an accelerated state.

4. The counterpulsation balloon catheter according to claim 3, characterized in that: The first opening is opened along the axial direction of the connection port, and the second opening is opened along the radial direction of the connection port on the outer wall of the connection port; the exhaust regulator includes an annular member and a sealing member arranged on the inner side of the annular member, and the annular member can be movably mounted on the connection port through the sealing member and is sealed and connected to the outer wall of the connection port; when the sealing member covers the second opening, the exhaust regulator is in the second position.

5. The counterpulsation balloon catheter according to claim 3, characterized in that: The first position, the second position and the third position are arranged in sequence from the proximal end to the distal end along the axial direction of the connection port.

6. The counterpulsation balloon catheter according to claim 3, characterized in that: The liquid filling chamber and the exhaust chamber are arranged in parallel along the axial direction of the connecting port.

7. The counterpulsation balloon catheter according to claim 1, characterized in that: The liquid filling chamber and the exhaust chamber are arranged in parallel or coaxially inside and outside in the conduit; or the conduit includes a liquid filling branch pipe and an exhaust branch pipe that are independent of each other, and the liquid filling chamber and the exhaust chamber are formed in the liquid filling branch pipe and the exhaust branch pipe respectively.

8. The counterpulsation balloon catheter according to claim 1, characterized in that: The liquid filling cavity is connected to the proximal region of the balloon; and the exhaust cavity is connected to the distal region of the balloon.

9. The counterpulsation balloon catheter according to claim 8, characterized in that: The catheter is used to define a portion of the exhaust cavity that extends into the distal region of the balloon and is open at the distal region of the balloon to communicate with the exhaust cavity; or, the catheter is used to define a portion of the exhaust cavity that extends into the distal region of the balloon and is connected to the distal end of the balloon, and the exhaust cavity is communicated with the balloon via a connecting hole provided in the side wall of the catheter.

10. A counterpulsation balloon catheter system, characterized in that: include: A counterpulsation device and a counterpulsation balloon catheter according to any one of claims 1 to 9; The counterpulsation device is connected to the catheter and is used to fill or extract the filling fluid through the catheter.

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