Balloon in aorta and IAB catheter

Abstract

The utility model discloses an in-aorta balloon and an IAB catheter. The in-aorta balloon comprises a balloon body and a catheter which is located outside the balloon body and connected with the front end of the balloon body. A balloon catheter with the hardness larger than that of the balloon body is arranged in the balloon body. The balloon catheter extends from the front end of the balloon body to the tail end of the balloon body by a preset length; the tail end of the balloon catheter is closed and a plurality of through holes are formed in the surface of the balloon catheter; the inner cavity of the catheter is communicated with the inner cavity of the balloon catheter or the inner cavity of the catheter, the inner cavity of the balloon catheter and the inner cavity of the balloon body are communicated at the same time, and when the front end of the balloon body is sucked to be shrunken, the tail end of the balloon body is sucked to be shrunken through the through holes in the surface of the balloon catheter at the same time. The balloon catheter is arranged, so that rapid deflation of the balloon is achieved, the negative pressure requirements of the rear end driving device and the negative pressure tank are reduced, meanwhile, deflation of the balloon can be accelerated, and the rapid response capacity when the heart rate is high or the heart rate is not stable is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of intra-aortic balloons, in particular to an intra-aortic balloon and an IAB catheter. Background Art

[0002] The existing intra-aortic balloon pump (IABP) is one of the most widely used percutaneous mechanical circulatory support devices. The hemodynamic effects of IABP are to improve coronary blood supply, reduce cardiac afterload and ventricular wall tension, moderately increase cardiac output (CO), maintain blood pressure, etc. IABP has been widely used in the rescue and treatment of critically ill patients such as heart failure.

[0003] In the aortic reverse balloon technique, the RR interval prediction method is used for normal patients, that is, at the end of the left ventricular pumping period, the balloon is inflated to assist pumping and increase the heart's ejection volume; a certain time in advance before the next left ventricular pumping, the balloon is inhaled and deflated to form a negative pressure difference between the artery and the left ventricle, reducing the left ventricular pumping load. The balloon is inhaled and inflated using a positive pressure tank A4 and a negative pressure tank A5, and the start and close depend on the corresponding connected solenoid valve, as shown in the attached figure. Figure 1 As shown. The existing valve closing treatment uses a negative pressure tank A5 to inhale, and the negative pressure is transmitted to the balloon A1 after passing through the safety valve A2. However, during inhalation, the front end of the balloon A1 and the catheter interface are deflated first, and the tail end of the balloon is deflated later. Since the deflation of the front part of the balloon will block the passage at the entrance of the balloon, it takes greater pressure and longer time to deflate the tail end.

[0004] When the patient's heart rate is fast, if the balloon cannot be deflated quickly, the effect of assisting the patient in reducing the left ventricular pumping load will be weakened. When the left ventricular pumping load is not reduced in time, the patient's heart ejection will be hindered, which may seriously threaten the patient's life. Utility Model Content

[0005] 1. Technical problems to be solved:

[0006] In view of the above technical problems, the utility model provides an intra-aortic balloon and an IAB catheter that can achieve rapid balloon inhalation. By making corresponding improvements to the existing intra-aortic balloon and adding a balloon catheter inside the balloon, the front end and the rear end of the balloon can be inhaled simultaneously to achieve rapid deflation of the entire balloon, which is beneficial to the rapid response ability of the balloon at high heart rate or unstable heart rate. At the same time, the rapid deflation of the balloon can also greatly reduce the negative pressure requirement for the negative pressure tank of the rear-end drive device.

[0007] 2. Technical solution:

[0008] According to one aspect of the present application, an intra-aortic balloon is provided, comprising a balloon body, and a catheter located outside the balloon body and connected to the front end of the balloon body; a balloon catheter with a hardness greater than that of the balloon body is arranged inside the balloon body; the balloon catheter extends a predetermined length from the front end of the balloon body to the rear end of the balloon body; the rear end of the balloon catheter is closed and a plurality of through holes are opened on its surface; the inner cavity of the catheter is connected with the inner cavity of the balloon catheter or the inner cavity of the catheter, the inner cavity of the balloon catheter and the inner cavity of the balloon body are connected at the same time, and when the front end of the balloon body is deflated, the rear end of the balloon body is also deflated through the through holes on the surface of the balloon catheter.

[0009] In some embodiments, the balloon catheter extends in the centerline direction of the balloon body, and the length of the balloon catheter is 1 / 10 to 1 times the length of the balloon body.

[0010] In some embodiments, the centerline of the balloon catheter is co-linear with the centerline of the balloon body.

[0011] In some embodiments, the plurality of through holes of the balloon catheter are located near a trailing end of the balloon catheter.

[0012] In some embodiments, the plurality of through holes are evenly distributed on the surface of the balloon catheter.

[0013] In some embodiments, a shaft tube is further disposed in the inner cavity of the balloon body; the head and tail of the shaft tube are respectively connected to the front end and the tail end of the balloon body, and penetrate the hollow part of the balloon catheter and be coaxial with the balloon catheter; the shaft tube is used to form a blood channel connected to an external device.

[0014] In some embodiments, the length of the balloon body is 150~300mm, and its cross-sectional diameter is 14~20mm; the length of the balloon catheter is 150~300mm, and its cross-sectional diameter is 2~3mm; the diameter of the surface through hole of the balloon catheter is 0.5~1.5mm; and the cross-sectional diameter of the shaft tube is 0.5~1.5mm.

[0015] In some embodiments, the balloon body is a soft polyurethane balloon; and the balloon catheter is a hard polyurethane balloon catheter.

[0016] In some embodiments, the thickness of the balloon body is 0.02-0.1 mm; the thickness of the balloon catheter is 0.1-0.8 mm.

[0017] According to another aspect of the present application, an IAB catheter is also provided, wherein the front end of the catheter of the intra-aortic balloon is connected to a sheath sealing sleeve, a cuff, and a Y-type connector in sequence; one end of the Y-type connector is connected to an extracorporeal pipeline, and the other end of the interface is a central lumen interface; the extracorporeal pipeline is connected to a negative pressure generating device.

[0018] 3. Beneficial effects:

[0019] The intra-aortic balloon in the present application has a balloon catheter with a through hole and a hardness greater than that of the balloon body in the cavity formed by the balloon body. When the negative pressure tank is activated to perform negative pressure inhalation, the hardness of the balloon catheter is greater than that of the balloon body. At this time, the front end opening of the balloon body will not be quickly deflated due to the support of the balloon catheter. At the same time, the balloon catheter extending into the balloon body cavity has a through hole on its surface that penetrates the inner cavity of the balloon. The through holes distributed at the rear end of the balloon catheter inhale the rear end of the inner cavity of the balloon, thereby achieving simultaneous inhalation of the front end and the rear end of the balloon. The entire balloon can then be quickly deflated, which is beneficial to improving the rapid response ability of the balloon during high heart rate or unstable heart rate.

[0020] The rapid deflation of the balloon can also significantly reduce the negative pressure requirement for the negative pressure tank of the rear-end drive device, making it possible to miniaturize the size of the IABP device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a device related to the inflation and deflation process of the intra-aortic balloon involved in the present application;

[0022] Figure 2 This is a schematic diagram of the overall structure of the IAB catheter in a specific embodiment of the present application;

[0023] Figure 3 It is an enlarged view of the balloon body when the balloon catheter penetrates the balloon in a specific embodiment;

[0024] Figure 4 It is an enlarged view of the balloon catheter when the balloon catheter is shorter than the balloon in a specific embodiment.

[0025] Figure numerals: balloon body 1, catheter 2, angiography marking point 3, balloon catheter 4, through hole 5, shaft tube 6, sheath sealing sleeve 7, cuff 8, Y-type connector 9, extracorporeal tubing 10, central lumen interface 11, one-way valve 12. DETAILED DESCRIPTION

[0026] The utility model is described in detail below in conjunction with the accompanying drawings.

[0027] According to the first aspect of the present application, an intra-aortic balloon is provided. Figure 1 With attached Figure 2, an intra-aortic balloon, comprising a balloon body, a catheter located outside the balloon body and connected to the front end of the balloon body; a balloon catheter with a hardness greater than that of the balloon body is arranged inside the balloon body; the balloon catheter extends a predetermined length from the front end of the balloon body to the rear end of the balloon body; the rear end of the balloon catheter is closed and a plurality of through holes are opened on its surface; the inner cavity of the catheter is connected with the inner cavity of the balloon catheter or the inner cavity of the catheter, the inner cavity of the balloon catheter and the inner cavity of the balloon body are connected at the same time, and when the front end of the balloon body is deflated, the rear end of the balloon body is also deflated through the through holes on the surface of the balloon catheter.

[0028] In the intra-aortic balloon of the above structure, a balloon catheter with a through hole and a hardness greater than that of the balloon body is arranged in the cavity formed by the balloon body. When the negative pressure tank is activated to perform negative pressure suction on the balloon, since the hardness of the balloon catheter is greater than that of the balloon body, the front end opening of the balloon body will not be quickly deflated due to the support of the balloon catheter. At the same time, the balloon catheter extending into the cavity of the balloon body has through holes on its surface that penetrate the inner cavity of the balloon, and the through holes distributed at the rear end of the balloon catheter suction the rear end of the inner cavity of the balloon, thereby achieving simultaneous suction of the front end and the rear end of the balloon, and the entire balloon can be quickly deflated.

[0029] In some embodiments, the balloon catheter extends in the centerline direction of the balloon body, and the length of the balloon catheter is 1 / 10 to 1 times the length of the balloon body. The balloon catheter can extend to part or all of the inner cavity of the balloon body, and the longer the length of the balloon catheter extending to the inner cavity of the balloon body, the more obvious the deflation effect.

[0030] In some embodiments, the centerline of the balloon catheter is in line with the centerline of the balloon body. When the inner cavity of the balloon body is rapidly deflated by negative pressure, the balloon body will exert a reverse force on the balloon catheter and eventually cover the balloon catheter. The centerlines of the balloon catheter and the balloon body are in line, which will make the surface of the balloon catheter evenly stressed and will not cause large displacement in the radial direction, thus ensuring the stability of the intra-aortic balloon during the deflation process.

[0031] In some embodiments, the plurality of through holes of the balloon catheter are close to the tail end of the balloon catheter. The through holes are arranged at the tail end of the balloon catheter, and the negative pressure can be transmitted to the part of the balloon body close to the tail end, and the front and rear ends of the balloon body are both sucked by the negative pressure, and the overall deflation of the balloon body can be achieved quickly.

[0032] In some embodiments, the plurality of through holes are evenly distributed on the surface of the balloon catheter. The plurality of through holes are evenly distributed, and each spatial orientation around the axis in the inner cavity of the balloon body forms an air suction channel connected to the through hole, and the air suction channels in each direction make the air suction pressure in the inner cavity of the balloon body roughly equal, so that the inner cavity of the balloon body can be quickly and evenly deflated.

[0033] In some embodiments, a shaft tube is further disposed in the inner cavity of the balloon body; the head and tail of the shaft tube are respectively connected to the front end and the tail end of the balloon body, and penetrate the hollow part of the balloon catheter and be coaxial with the balloon catheter; the shaft tube is used to form a blood channel connected to an external device.

[0034] In some embodiments, the length of the balloon body is 150~300mm, and its cross-sectional diameter is 14~20mm; the length of the balloon catheter is 150~300mm, and its cross-sectional diameter is 2~3mm; the diameter of the surface through hole of the balloon catheter is 0.5~1.5mm; and the cross-sectional diameter of the shaft tube is 0.5~1.5mm.

[0035] In some embodiments, the balloon body is a soft polyurethane balloon; and the balloon catheter is a hard polyurethane balloon catheter.

[0036] In some embodiments, the thickness of the balloon body is 0.02-0.1 mm; the thickness of the balloon catheter is 0.1-0.8 mm.

[0037] According to another aspect of the present application, an IAB catheter is also provided, wherein the front end of the catheter of the intra-aortic balloon is connected to a sheath sealing sleeve, a cuff, and a Y-type connector in sequence; one end of the Y-type connector is connected to an extracorporeal pipeline, and the other end of the interface is a central lumen interface; the extracorporeal pipeline is connected to a negative pressure generating device. Specific embodiment:

[0039] like Figure 1 As shown, it is a schematic diagram of the device related to the suction and deflation process of the intra-aortic balloon involved in the prior art. When the negative pressure tank inhales, the balloon body is deflated, and the air pressure collected by the pressure sensor is used to determine whether a preset negative pressure difference has been formed relative to the left ventricle. During the inhalation process, the negative pressure is transmitted to the balloon A1 after passing through the safety valve A2, but during the inhalation, the front end of the balloon A1 and the catheter interface are deflated first, and the tail end of the balloon is deflated later; at this time, because the front part of the balloon is deflated first, the channel is blocked, so it takes greater pressure and longer time to deflate the tail end; for the limited capacity of the negative pressure tank and the patient's heart rate is fast, the heart rate cycle is short, and the time for the gas tank to close the valve and replenish air is short, and the air pressure is relatively easy to be insufficient.

[0040] As attached Figure 2As shown, a schematic diagram of the structure of an IAB catheter provided according to an embodiment of the present application. In this embodiment, the balloon catheter in the intra-aortic balloon passes through the inner cavity of the balloon body, and the centerline of the balloon catheter is colinear with the centerline of the balloon body. During operation, the one-way valve 12 controls the catheter to be connected to a positive pressure tank or a negative pressure tank; the air pressure is transmitted to the Y-type connector 9 through the extracorporeal pipe 10; one path of the Y-type connector 9 is connected to the front end of the balloon body 1 through the sleeve 7 structure and the sheath sealing sleeve 6 pipe, and the balloon catheter 4 in the balloon body 1 is set to achieve communication with the inner cavity of the balloon body. At this time, an enlarged view of the balloon catheter 4 is shown in the attached figure. Figure 3 shown.

[0041] As attached Figure 4 This is an enlarged view of the balloon catheter when the balloon catheter is shorter than the balloon. When the length of the balloon catheter is greater than 1 / 10 of the length of the balloon body, the inflation and deflation of the balloon can be effectively accelerated.

[0042] As attached Figure 3 and 4 As shown, in specific implementation, the through holes distributed on the surface of the balloon catheter can be evenly distributed, or can be densely distributed only at the tail of the balloon catheter. Practice has proved that both through hole distribution methods can achieve simultaneous deflation of the front and rear ends of the balloon.

[0043] It should be noted that the present application does not limit the shape and size of the through hole. As long as the balloon catheter can be connected to the inner cavity of the balloon body, it falls within the protection scope of the present application.

[0044] In specific implementation, the one-way valve of the negative pressure tank is controlled to open and the balloon is deflated; subsequently, when the cardiac contraction signal is identified through electrocardiogram or blood pressure; according to the preset delay control, after the cardiac ejection ends, the positive pressure tank is opened and the balloon is inflated; before the next cardiac ejection period begins, the negative pressure tank is opened and the balloon is deflated, so that the aorta forms a more obvious negative pressure relative to the left ventricle, reducing the cardiac ejection load. When this device is used, the one-way valve of the negative pressure tank opens, the front end of the balloon is deflated, and the rear end of the balloon is quickly deflated through the through hole on the surface of the balloon pipe, reducing the negative pressure requirement for the balloon. Therefore, compared with the existing structure, the intra-aortic balloon using this structure is more suitable for high heart rate or unstable heart rate, and can effectively improve clinical adaptability; it improves general clinical performance, and by achieving faster deflation, the aorta where the balloon is located will form a lower negative pressure than the ventricle, which can more effectively reduce the load of the left ventricle during ejection, and greatly improve the main clinical efficacy of IABP; at the same time, by reducing the negative pressure requirement, the volume requirement of the negative pressure tank can be reduced, making it possible to miniaturize the volume of IABP, reduce power consumption, and reduce noise. It is of great significance for the clinical application of IABP equipment.

[0045] Although the present invention has been disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection defined by the claims of this application.

Claims

1. An intra-aortic balloon, comprising a balloon body, and a catheter located outside the balloon body and connected to the front end of the balloon body; characterized in that: A balloon catheter with a harderness greater than that of the balloon body is arranged inside the balloon body; the balloon catheter extends a predetermined length from the front end of the balloon body to the rear end of the balloon body; the rear end of the balloon catheter is closed and a plurality of through holes are opened on its surface; the inner cavity of the catheter is connected with the inner cavity of the balloon catheter or the inner cavity of the catheter, the inner cavity of the balloon catheter and the inner cavity of the balloon body are connected at the same time, and when the front end of the balloon body is deflated, the rear end of the balloon body is also deflated at the same time through the through holes on the surface of the balloon catheter.

2. An intra-aortic balloon according to claim 1, characterized in that: The balloon catheter extends in the centerline direction of the balloon body, and the length of the balloon catheter is 1 / 10 to 1 times the length of the balloon body.

3. An intra-aortic balloon according to claim 1, characterized in that: The centerline of the balloon catheter is colinear with the centerline of the balloon body.

4. An intra-aortic balloon according to claim 1, characterized in that: The plurality of through holes of the balloon catheter are close to the tail end of the balloon catheter.

5. The intra-aortic balloon according to claim 1, characterized in that: The multiple through holes are evenly distributed on the surface of the balloon catheter.

6. An intra-aortic balloon according to any one of claims 1 to 5, characterized in that: An axle tube is also arranged in the inner cavity of the balloon body; the head and tail of the axle tube are respectively connected to the front end and the tail end of the balloon body, and penetrate the hollow part of the balloon catheter and be coaxial with the balloon catheter; the axle tube is used to form a blood channel connected to an external device.

7. An intra-aortic balloon according to claim 6, characterized in that: The length of the balloon body is 150-300 mm, and its cross-sectional diameter is 14-20 mm; the length of the balloon catheter is 150-300 mm, and its cross-sectional diameter is 2-3 mm; the diameter of the surface through hole of the balloon catheter is 0.5-1.5 mm; and the cross-sectional diameter of the shaft tube is 0.5-1.5 mm.

8. An intra-aortic balloon according to claim 7, characterized in that: The balloon body is a soft polyurethane balloon; and the balloon catheter is a hard polyurethane balloon catheter.

9. An intra-aortic balloon according to claim 8, characterized in that: The thickness of the balloon body is 0.02-0.1 mm; the thickness of the balloon catheter is 0.1-0.8 mm.

10. An IAB catheter, characterized in that: It comprises an intra-aortic balloon as claimed in any one of claims 1 to 9, wherein the front end of the catheter of the intra-aortic balloon is connected to a sheath sealing sleeve, a cuff, and a Y-type connector in sequence; one interface of the Y-type connector is connected to an extracorporeal pipeline, and the other interface is a central lumen interface; the extracorporeal pipeline is connected to a negative pressure generating device.

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