Perfusion balloon assembly

Abstract

An embodiment of the present invention discloses an infusion balloon assembly. The infusion balloon assembly includes a catheter. The catheter includes an inner tube and an outer tube sleeved outside the inner tube. A first notch is provided on the side wall of the catheter. A second notch is provided on the side of the first notch away from the distal end of the catheter. The first notch is configured to cooperate with the opening at the distal end of the inner tube so that blood can flow through the inner tube. The second notch is for a guide wire to pass through. A balloon, the balloon is communicated with the outer tube. The balloon is located on the side of the first notch close to the distal end of the inner tube. The distal end of the inner tube extends out through the balloon. And an infusion device for injecting liquid into the balloon. An anti-blood coagulation mechanism is provided between the first notch and the second notch. The anti-blood coagulation mechanism is configured to cooperate with the guide wire and can prevent the blood in the inner tube from coagulating under the drive of the guide wire.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular, to an infusion balloon assembly. Background Art

[0002] An infusion balloon is used to locally dilate blood vessels during the treatment of vascular diseases. The infusion balloon assembly includes a catheter. The catheter has a guide wire lumen and a liquid injection lumen. The liquid injection lumen is in communication with the infusion balloon to inject liquid into the infusion balloon to cause the infusion balloon to expand. The guide wire lumen enables the catheter to be sleeved on the guide wire, and the guide wire acts as a guide rail to guide the catheter to a set position.

[0003] After the existing infusion balloon is dilated in a blood vessel, it will block the blood vessel, resulting in a situation where blood does not flow;

[0004] In addition, when blood enters the inner tube of the catheter, the non-flowing blood will quickly coagulate inside the inner tube. Summary of the Invention

[0005] An object of the present invention is to provide a new technical solution for an infusion balloon assembly.

[0006] In the present invention, an infusion balloon assembly is provided. The infusion balloon assembly includes a catheter. The catheter includes an inner tube and an outer tube sleeved outside the inner tube. The inner tube and the outer tube are sealed. The distal end of the inner tube has an opening. A first notch is provided on the side wall of the catheter. A second notch is provided on the side of the first notch away from the distal end of the catheter. The first notch is configured to cooperate with the opening at the distal end of the inner tube so that blood can flow through the inner tube. The second notch is for the guide wire to pass through.

[0007] A balloon, the balloon is in communication with the outer tube. The balloon is located on the side of the first notch close to the distal end of the inner tube. The distal end of the inner tube extends out through the balloon; and

[0008] An injection device for injecting liquid into the balloon;

[0009] An anti-blood coagulation mechanism is provided between the first notch and the second notch. The anti-blood coagulation mechanism is configured to cooperate with the guide wire and can prevent the blood in the inner tube from coagulating under the drive of the guide wire.

[0010] Optionally, the anti-blood coagulation mechanism includes a first stop portion, a second stop portion and a sealing device. The first stop portion and the second stop portion are spaced apart and are respectively fixedly connected to the inner wall of the inner tube along the radial direction of the inner tube. The sealing device is configured to be movable between the first stop portion and the second stop portion;

[0011] When the guide wire moves in the first direction, the sealing device moves in the first direction driven by the guide wire, and the first stop portion can form a stop fit with the sealing device;

[0012] When the guide wire moves in the second direction, the sealing device moves in the second direction driven by the guide wire, and the second stop portion can form a stop fit with the sealing device.

[0013] Optionally, the sealing device is an O-ring, and the outer peripheral surface of the O-ring is slidably connected to the inner wall of the inner tube.

[0014] Optionally, a first gap and a second gap are correspondingly arranged in the first stop portion and the second stop portion;

[0015] The first stop portion divides the inner tube into a first blood chamber and a second blood chamber. The side of the first stop portion close to the distal end of the inner tube is the first blood chamber, and a second blood chamber is formed between the first stop portion and the sealing device;

[0016] When the sealing device moves in the first direction, the blood in the second blood chamber is pressed into the first blood chamber through the first gap;

[0017] When the sealing device moves in the second direction, the blood in the first blood chamber is sucked into the second blood chamber through the first gap.

[0018] Optionally, the sizes of the first gap and the second gap are the same or different, and the inner diameters of the first gap and the second gap are larger than the inner diameter of the guide wire.

[0019] Optionally, the inner diameters of the first gap and the second gap are between 0.5 mm and 10 mm.

[0020] Optionally, the thickness of the O-ring along the axial direction of the inner tube is between 0.5 mm and 5 mm, and the distance between the first stop portion and the second stop portion along the axial direction of the inner tube is greater than or equal to 10 mm.

[0021] Optionally, the second notch is located on the side wall of the catheter.

[0022] Optionally, a sealing film is arranged on the second notch, and the sealing film is used to block the second notch.

[0023] Optionally, the sealing device is a polymer.

[0024] By positioning the balloon between the distal end of the inner tube and the first opening, it is possible to establish conduction on both sides of the inflated balloon, thereby avoiding the occurrence of blood vessel blockage caused by balloon inflation. At the same time, by placing the anticoagulation mechanism between the first notch and the second notch, the blood flow inside the inner tube is increased, effectively preventing blood coagulation inside the inner tube.

[0025] Other features and advantages of this specification will become clear from the following detailed description of the exemplary embodiments of this specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings incorporated in and constituting a part of this specification illustrate embodiments of this specification and, together with the description, are used to explain the principles of this specification.

[0027] Figure 1 is a schematic structural diagram of the perfusion balloon assembly in an embodiment of the present invention;

[0028] Figure 2 is in an embodiment of the present invention Figure 1 a partial enlarged view of part A therein;

[0029] Figure 3 is in an embodiment of the present invention Figure 1 a partial enlarged view of part B therein;

[0030] Figure 4 is a partial structural schematic diagram of the perfusion balloon assembly in an embodiment of the present invention;

[0031] Figure 5 is in an embodiment of the present invention Figure 1 a partial enlarged view of part C therein.

[0032] DESCRIPTION OF THE REFERENCE NUMERALS

[0033] 100, first notch; 110, slope; 200, second notch; 210, sealing film; 220, sealing device; 300, inner tube; 310, first cavity; 320, retaining wall; 330, first blood cavity; 340, second blood cavity; 350, first stop; 351, first gap; 360, second stop; 361, second gap; 400, outer tube; 410, second cavity; 500, balloon; 600, adapter; 700, guide wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0035] The terms "first", "second" in the description and claims of the present invention may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. 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.

[0038] According to an embodiment of the present invention, as Figures 1-5As shown in the figure, a perfusion balloon 500 assembly is provided. The perfusion balloon 500 assembly includes a catheter, a balloon 500, and a liquid injection device. The catheter includes an inner tube 300 and an outer tube 400 sleeved outside the inner tube 300, and the inner tube 300 is sealed with the outer tube 400. The distal end of the inner tube 300 has an opening. A first notch 100 is provided on the side wall of the catheter. A second notch 200 is provided on the side of the first notch 100 away from the distal end of the catheter. The first notch 100 is configured to cooperate with the opening at the distal end of the inner tube 300 so that blood can flow through the inner tube 300. The second notch 200 is for a guide wire 700 to pass through. The balloon 500 is in communication with the outer tube 400. The balloon 500 is located on the side of the first notch 100 close to the distal end of the inner tube 300, and the distal end of the inner tube 300 extends out through the balloon 500. The liquid injection device is used to inject liquid into the balloon 500. Between the first notch 100 and the second notch 200, an anti-blood coagulation mechanism is provided. The anti-blood coagulation mechanism is configured to cooperate with the guide wire 700 and, driven by the guide wire 700, can prevent the blood in the inner tube 300 from coagulating.

[0039] As Figure 1 shown, the proximal end of the catheter is a hand-held end, and the balloon 500 is located at a position on the catheter close to the distal end of the catheter. The end with the balloon 500 is pushed into the blood vessel of the human body along the track of the guide wire 700. The liquid injection device is located at the proximal end of the catheter to be able to inject liquid into the balloon 500. For example, the catheter includes an inner tube 300 and an outer tube 400. The inner tube 300 is located inside the outer tube 400, and the inner tube 300 extends along the axial direction of the outer tube 400. A first cavity 310 is provided inside the inner tube 300, and a second cavity 410 is formed between the inner wall of the outer tube 400 and the outer wall of the inner tube 300. The first cavity 310 and the second cavity 410 are isolated from each other.

[0040] As Figure 1As shown, the proximal end of the catheter is the handheld end, and the balloon 500 is located on the catheter near the distal end of the catheter. The end with the balloon 500 is pushed into the blood vessel of the human body along the track of the guide wire 700. The liquid injection device is located at the proximal end of the catheter to be able to inject liquid into the balloon 500. For example, the catheter includes an inner tube 300 and an outer tube 400. The inner tube 300 is located inside the outer tube 400 and extends axially along the outer tube 400. The inner tube 300 has a first cavity 310, and the inner wall of the outer tube 400 and the outer wall of the inner tube 300 enclose a second cavity 410. The first cavity 310 and the second cavity 410 are isolated from each other. The second notch 200 can be located on the end face of the proximal end of the catheter or on the side wall of the catheter. In the technical solution of the present application, the first cavity 310 enclosed by the inner tube 300 and the second cavity 410 enclosed by the outer wall of the inner tube 300 and the inner wall of the outer tube 400 are isolated from each other. The second cavity 410 is used to inject liquid into the balloon 500, and the first cavity 310 is used to allow the guide wire 700 to pass through and to allow blood to flow, that is, the first cavity 310 and the second cavity 410 are not connected.

[0041] For example, both the first notch 100 and the second notch 200 are located on the side of the balloon 500 away from the distal end of the catheter, and the second notch 200 is located on the side of the first notch 100 close to the proximal end of the catheter. When the balloon 500 is located in the blood vessel and in an inflated state, the balloon 500 causes local blood flow to stop, the pressure in the blood vessel rises, and the blood is pressed into the inner tube 300 from the opening at the end of the inner tube 300 and flows out from the first notch 100. Or it flows into the inner tube 300 from the first notch 100 and flows out from the opening at the distal end of the inner tube 300. In this way, the way that the balloon 500 is located between the distal end of the inner tube 300 and the first opening can make the two sides of the balloon 500 in the inflated state conduct, thus avoiding the occurrence of blood vessel blockage caused by the inflation of the balloon 500.

[0042] In an example of the present invention, the second notch 200 is located on the side wall of the catheter. During actual use, for example, in one embodiment, the distal end of the guide wire 700 can be first placed at a set position in the blood vessel, and the proximal end of the guide wire 700 is inserted into the inner tube 300 from the distal end of the inner tube 300 and extends out of the inner tube 300 through the second notch 200 from the side wall of the catheter. The catheter is guided along the track of the guide wire 700, and the balloon 500 is set at a set position in the blood vessel under the guidance of the guide wire 700. The liquid injection device injects liquid into the balloon 500. After the balloon 500 is inflated, the blood keeps flowing through the first notch 100. The proximal end of the guide wire 700 extends out of the inner tube 300 through the second notch 200 from the side wall of the catheter. By pulling the proximal end of the guide wire 700, the guide wire 700 can be withdrawn from the inner tube 300.

[0043] In this way, by pulling the guide wire 700 out of the second notch 200 on the side wall of the catheter and keeping the second notch 200 away from the injection device located at the proximal end of the outer tube 400, the situation of accidentally touching the injection device when operating the guide wire 700 is avoided, thereby improving the user experience.

[0044] like Figure 5 As shown, an anti-coagulation mechanism is provided between the first notch 100 and the second notch 200, and the anti-coagulation mechanism can cooperate with the guide wire 700, and can drive the anti-coagulation mechanism to move when the guide wire 700 is pulled in the inner tube 300. Thus, the anti-coagulation mechanism can drive the blood in the inner tube 300 to flow, thus effectively avoiding the situation that the blood flowing into the blood vessel does not move for a long time and causes blood coagulation.

[0045] For example, blood flowing into the blood vessel from the opening at the distal end of the inner tube 300 will fill the first cavity 310. When the first cavity 310 is filled, the pressure in the first cavity 310 rises, and the blood is pressed out of the inner tube 300 from the first notch 100, so that the blood on both sides of the balloon 500 can flow, avoiding blood vessel blockage. In addition, after many experiments, it was found that the blood flow efficiency between the first notch 100 and the second notch 200 is slow. Due to the fast coagulation speed of blood, the blood between the first notch 100 and the second notch 200 will coagulate. In order to avoid blood coagulation, the anti-coagulation mechanism is located between the first notch 100 and the second notch 200 to increase the blood fluidity at this position, which can effectively avoid the blood coagulation in the inner tube 300.

[0046] In an example, Figure 5 As shown, the anti-coagulation mechanism includes a first stopper 350, a second stopper 360 and a sealing device 220. The first stopper 350 and the second stopper 360 are spaced apart and are respectively fixedly connected to the inner wall of the inner tube 300 along the radial direction of the inner tube 300. The sealing device 220 is configured to be able to move between the first stopper 350 and the second stopper 360. When the guide wire 700 moves along the first direction, the sealing device 220 moves along the first direction driven by the guide wire 700, and the first stopper 350 can form a stopper match with the sealing device 220. When the guide wire 700 moves along the second direction, the sealing device 220 moves along the second direction driven by the guide wire 700, and the second stopper 360 can form a stopper match with the sealing device 220.

[0047] like Figure 5As shown, the first stop portion 350 can be a continuous ring shape, or formed by teeth protruding from the inner wall of the inner tube 300 partially towards the central axis direction of the inner tube 300. There can be multiple teeth. The multiple teeth are arranged at intervals and are arranged in a circumferential direction around the inner wall of the inner tube 300. The first stop portion 350 and the second stop portion 360 are arranged at intervals along the axial direction of the inner tube 300. The distance between the first stop portion 350 and the second stop portion 360 along the axial direction of the inner tube 300 is greater than or equal to 10 mm. The longer the distance between the first stop portion 350 and the second stop portion 360, the better the effect of preventing blood coagulation. For example, the distance between the first stop portion 350 and the second stop portion 360 is 6 mm, 8 mm or 10 mm. In this way, the effect of effectively preventing blood coagulation can be achieved.

[0048] For example, the first stop portion 350 and the second stop portion 360 can be integrally formed with the inner tube 300, or the first stop portion 350 and the second stop portion 360 can be connected to the inner wall of the inner tube 300 by welding or gluing. Both the first stop portion 350 and the second stop portion 360 are perpendicular to the central axis of the inner tube 300.

[0049] For example, the sealing device 220 is an O-ring, and the outer peripheral surface of the O-ring is slidably connected to the inner wall of the inner tube 300. The sealing device 220 is, for example, an O-ring with a set thickness, and the outer peripheral surface of the O-ring is in interference fit with the inner wall of the inner tube 300. When the guide wire 700 enters the inner tube 300 from the opening at the distal end of the inner tube 300, it passes through the O-ring and extends out from the second notch 200. When the guide wire 700 moves relative to the inner tube 300, a frictional force is generated between the O-ring and the guide wire 700. When the frictional force between the O-ring and the guide wire 700 is greater than the frictional force between the outer peripheral surface of the O-ring and the inner wall of the inner tube 300, the guide wire 700 can drive the O-ring to move in the same direction as it. When the O-ring and the guide wire 700 are moving, when the O-ring contacts the first stop portion 350 or the second stop portion 360, a stop fit will be formed with the first stop portion 350 or the second stop portion 360.

[0050] For example, a first gap 351 and a second gap 361 are correspondingly arranged in the first stop portion 350 and the second stop portion 360, and the first gap 351 and the second gap 361 are used to enable blood to circulate in the inner tube 300.

[0051] Such as Figure 5As shown, the shapes of the first gap 351 and the second gap 361 are determined by the shapes of the first stop 350 and the second stop 360. When both the first stop 350 and the second stop 360 are continuous rings, the first gap 351 and the second gap 361 are circular holes. When the first stop 350 and the second stop 360 are gear-shaped, the first gap 351 and the second gap 361 are gear-shaped. The sizes of the first gap 351 and the second gap 361 are the same or different, and the inner diameters of the first gap 351 and the second gap 361 are greater than the inner diameter of the guide wire 700. The guide wire 700 can move smoothly between the first gap 351 and the second gap 361. The first stop 350 is located on the side of the second stop 360 closer to the balloon 500, and the second stop 360 is located on the side of the first stop 350 farther from the balloon 500. The first gap 351 is used to allow the guide wire 700 and blood to pass through to increase the fluidity of the blood, and the second gap 361 is used to allow the guide wire 700 to pass through. Those skilled in the art can set the shapes of the first gap 351 and the second gap 361 according to their uses.

[0052] As Figure 5 shown, the first direction is the direction from the second stop 360 towards the first stop 350. When the sealing device 220 moves from the second stop 360 towards the direction closer to the first stop 350, it is the sealing device 220 moving in the first direction. When the guide wire 700 moves in the first direction, the sealing device 220 moves in the first direction. The second direction is the direction opposite to the first direction, which is the direction from the first stop 350 towards the second stop 360. When the sealing device 220 moves from the first stop 350 towards the direction closer to the second stop 360.

[0053] For example, the first stop 350 divides the inner tube 300 into a first blood chamber 330 and a second blood chamber 340. The side of the first stop 350 closer to the distal end of the inner tube 300 is the first blood chamber 330, and a second blood chamber 340 is formed between the first stop 350 and the sealing device 220. When the sealing device 220 moves in the first direction, the blood in the second blood chamber 340 is pressed into the first blood chamber 330 through the first gap 351. When the sealing device 220 moves in the second direction, the blood in the first blood chamber 330 is sucked into the second blood chamber 340 through the first gap 351. The guide wire 700 is also allowed to pass through the first blood chamber 330 and the second blood chamber 340. The first blood chamber 330 and the second blood chamber 340 are in communication.

[0054] As Figure 5As shown, the size of the first gap 351 of the first stop 350 determines the flow rate of blood from the second blood chamber 340 into the first blood chamber 330. The smaller the size of the first gap 351, the higher the flow rate of the blood. Those skilled in the art can set it according to their needs. The blood located inside the inner tube 300 can flow in the first blood chamber 330 and the second blood chamber 340 through the sealing device 220 driven by the guide wire 700 and the first gap 351. At the same time, the size of the first gap 351 can adjust the flow velocity in the first blood chamber 330 and the second blood chamber 340. Thereby, it can further increase the flow rate of the blood inside the inner tube 300 and avoid the situation of blood coagulation inside the inner tube 300.

[0055] For example, the inner diameters of the first gap 351 and the second gap 361 are between 0.5 mm and 10 mm. It can be that the inner diameters of both the first gap 351 and the second gap 361 are 3 mm, or the inner diameter of the first gap 351 is 0.5 mm and the inner diameter of the second gap 361 is 4 mm.

[0056] Preferably, when the inner diameter of the first gap 351 is 2.5 mm - 4 mm, it can ensure that the time for blood to flow from the first blood chamber 330 into the second blood chamber 340 is shorter, and the pressure and flow rate are greater when the blood flows from the second blood chamber 340 into the first blood chamber 330.

[0057] Optionally, the thickness of the sealing ring along the axial direction of the inner tube 300 is 0.5 mm to 5 mm, and the distance between the first stop 350 and the second stop 360 along the axial direction of the inner tube 300 is greater than or equal to 10 mm.

[0058] Those skilled in the art can set the thickness of the sealing ring and the distance between the first stop 350 and the second stop 360 according to the actual situation based on the volume of the second blood chamber 340 and the frictional force between the guide wire 700 and the sealing ring.

[0059] For example, as Figure 2 shown, by welding the inner tube 300 and the outer tube 400 at the first notch 100 and the second notch 200, the first chamber 310 and the second chamber 410 are isolated.

[0060] As Figure 2 shown, the wall of the inner tube 300 at the position where the first notch 100 is located is welded to the outer tube 400, thereby preventing the first chamber 310 and the second chamber 410 from communicating at the position of the first notch 100. The welding method can be hot melt welding, and of course, it can also be adhesive bonding.

[0061] For example, the cross-sectional shape of the first notch 100 can be of any shape. The first notch 100 forms openings at local parts of the side walls of the inner tube 300 and the outer tube 400 respectively, and the openings can be circular, elliptical or irregular in shape. When the opening is circular, the blood flow resistance can be effectively reduced.

[0062] It can be understood that in order to prevent the first cavity 310 and the second cavity 410 from communicating at the second notch 200, the inner tube 300 and the outer tube 400 at the position of the second notch 200 are also welded.

[0063] In this way, it can effectively prevent the first cavity 310 and the second cavity 410 from conducting when an opening is formed in the side wall of the catheter.

[0064] During actual use, blood will flow through the end opening of the inner tube 300 and the first notch 100, and part of the blood will also flow along the inner tube 300 to the second notch 200. To prevent blood leakage at the second notch 200, a sealing film 210 is provided on the second notch 200, and the sealing film 210 seals the second notch 200.

[0065] For example, the sealing film 210 is made of materials such as rubber or silica gel. The sealing film 210 is, for example, the sealing film 210. The outer edge of the sealing film 210 is bonded or welded inside the second notch 200 to prevent blood from leaking out of the second notch 200. The guide wire 700 passes through the sealing film 210 and extends outside the inner tube 300.

[0066] Optionally, the sealing film 210 has elasticity. After the guide wire 700 passes through the sealing film 210, the sealing film 210 squeezes and wraps the outer wall of the guide wire 700, so that no blood leakage occurs at the position where the guide wire 700 passes through the sealing film 210.

[0067] In one example, as Figure 3 and Figure 4 shown, in order to reduce the retention of blood in the inner tube 300 and facilitate the guide wire 700 to extend out of the second notch 200 more conveniently.

[0068] For example, the second notch 200 is located at the proximal end of the inner tube 300. That is to say, at the proximal end of the inner tube 300, that is, near the end of the inner tube 300, the second notch 200 is opened, and the second notch 200 is in the direction perpendicular to the end of the inner tube 300. One side of the second notch 200 close to the proximal end of the inner tube 300 abuts against the end face of the proximal end of the inner tube 300.

[0069] In this way, when the guide wire 700 passes through the inner tube 300, the proximal end of the guide wire 700 will first abut against the end face of the proximal end of the inner tube 300. Since the end face of the proximal end blocks the tip of the guide wire 700, the guide wire 700 will bend to extend out from the second notch 200. In addition, the situation of space waste caused by the proximal end of the inner tube 300 exceeding the position where the second notch 200 is located is avoided, and the amount of blood in the inner tube 300 is also reduced.

[0070] For example, in order to avoid the situation where the proximal end of the guide wire 700 bends away from the second notch 200, resulting in a reduction in the extraction efficiency of the guide wire 700 and causing inconvenience to the operator. The end face of the proximal end of the guide wire 700 is a slope 110 to form a retaining wall 320. As Figure 3 shown, the inner tube 300 includes a tube body and a retaining wall 320, and the retaining wall 320 is bent from the tube body toward the direction close to the second notch 200. The retaining wall 320 is welded to the inner peripheral surface of the second notch 200. The retaining wall 320 is inclined along the central axis of the inner tube 300 and is inclined from the direction close to the distal end of the inner tube 300 toward the direction close to the proximal end of the inner tube 300. The distance between the retaining wall 320 and the second notch 200 or the distance from the sealing ring gradually decreases from the side close to the distal end of the inner tube 300 toward the side close to the proximal end of the inner tube 300.

[0071] In this way, when the guide wire 700 abuts against the retaining wall 320, the end of the guide wire 700 is guided to the second notch 200 under the guidance of the retaining wall 320. In this way, the extraction efficiency of the guide wire 700 can be improved, and the user experience can be further enhanced.

[0072] Optionally, the retaining wall 320 extends from the side wall of the outer tube 400, and the second notch 200 is located at the proximal end of the inner tube 300. In this way, the proximal end of the inner tube 300 is higher than the height of the inner tube 300 body. In this way, the accumulation of blood at the proximal end position of the inner tube 300 can be avoided, and the situation of blood leakage from the second notch 200 can be further avoided.

[0073] In one example, the second notch 200 is located at the end of the retaining wall 320. A sealing structure is arranged at the position of the proximal end of the inner tube 300.

[0074] In order to make the retaining wall 320 have a better guiding effect, the bending angle of the retaining wall 320 is between 90° and 180°. That is, greater than 90° and less than 180°. The angle formed between the retaining wall 320 and the inner wall of the inner tube 300 body is greater than 90°. For example, it is 120° or 150°.

[0075] This can play a better guiding role.

[0076] In one example, in order to install other devices at the proximal end of the inner tube 300, a conversion joint 600 is connected to the proximal end of the inner tube 300. Specifically, as Figure 4 shown, a conversion joint 600 is installed at the end of the retaining wall 320 that extends out of the catheter.

[0077] As Figure 4 shown, the conversion joint 600 is, for example, a Luer connector. A hemostatic device or a sealing film 210, etc. can be installed on the Luer connector, and those skilled in the art can select according to their needs.

[0078] In one example of the present application, the first notch 100 is used to allow blood to flow through. In order to reduce the resistance of blood flow, the inner wall of the first notch 100 is a slope surface 110, and the slope surface 110 is inclined axially from a position close to the balloon 500 towards a position away from the balloon 500.

[0079] For example, the inner tube 300 is made of plastic, and the outer tube 400 is also made of plastic. The first notch 100 and the second notch 200 can be formed by cutting or hot melting, etc. The sealing device 220 is a polymer, such as silica gel or rubber, etc. The sealing device 220 is a material or structure that enables the guide wire 700 to pass through. For example, the end of the guide wire 700 can pierce the sealing device 220 and the sealing film 210, or it can be other ways, and those skilled in the art can select by themselves.

[0080] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0081] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A perfusion balloon assembly, characterized in that, Comprising: A catheter, the catheter includes an inner tube and an outer tube sleeved outside the inner tube, the inner tube is sealed with the outer tube, the distal end of the inner tube has an opening, a first notch is provided on the side wall of the catheter, and a second notch is provided on the side away from the distal end of the catheter. The first notch is configured to cooperate with the opening at the distal end of the inner tube so that blood can flow through the inner tube, and the second notch is for a guide wire to pass through. A balloon, the balloon is communicated with the outer tube, the balloon is located on the side of the first notch close to the distal end of the inner tube, and the distal end of the inner tube extends out through the balloon. And An injection device for injecting liquid into the balloon. An anti-coagulation mechanism is arranged between the first notch and the second notch. The anti-coagulation mechanism is configured to cooperate with the guide wire and can prevent the blood in the inner tube from coagulating under the drive of the guide wire. The anti-coagulation mechanism includes a first stop portion, a second stop portion and a sealing device. The first stop portion and the second stop portion are spaced apart and are respectively fixedly connected to the inner wall of the inner tube along the radial direction of the inner tube. The sealing device is configured to be able to move between the first stop portion and the second stop portion. When the guide wire moves in the first direction, the sealing device moves in the first direction under the drive of the guide wire, and the first stop portion can form a stop fit with the sealing device. When the guide wire moves in the second direction, the sealing device moves in the second direction under the drive of the guide wire, and the second stop portion can form a stop fit with the sealing device.

2. The perfusion balloon assembly according to claim 1, wherein The sealing device is an O-ring, and the outer peripheral surface of the O-ring is slidably connected to the inner wall of the inner tube.

3. The perfusion balloon assembly according to claim 1, wherein A first gap and a second gap are correspondingly provided on the first stop portion and the second stop portion. The first stop portion divides the inner tube into a first blood cavity and a second blood cavity. The side of the first stop portion close to the distal end of the inner tube is the first blood cavity, and a second blood cavity is formed between the first stop portion and the sealing device. When the sealing device moves in the first direction, the blood in the second blood cavity is pressed into the first blood cavity through the first gap. When the sealing device moves in the second direction, the blood in the first blood cavity is sucked into the second blood cavity through the first gap.

4. The perfusion balloon assembly according to claim 3, characterized in that, The sizes of the first gap and the second gap are the same or different, and the inner diameters of the first gap and the second gap are larger than the inner diameter of the guide wire.

5. The perfusion balloon assembly according to claim 4, wherein The inner diameters of the first gap and the second gap are 0.5 mm to 10 mm.

6. The infusion balloon assembly according to claim 2, wherein, The thickness of the O-ring along the axial direction of the inner tube is 0.5 mm to 5 mm, and the distance between the first stop portion and the second stop portion along the axial direction of the inner tube is greater than or equal to 10 mm.

7. The perfusion balloon assembly according to any one of claims 1-6, characterized in that, The second notch is located on the side wall of the catheter.

8. The infusion balloon assembly according to claim 7, wherein, A sealing film is provided on the second notch for sealing the second notch.

9. The perfusion balloon assembly according to claim 1, wherein The sealing device is a polymer.

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