Partial occlusion bailout balloon

Abstract

The utility model relates to a kind of partial plugging first-aid balloon, including catheter and balloon assembly, balloon assembly includes multiple balloon petals distributed along the circumference of catheter;Balloon petal includes first bag part when initial folding and sticking state, and second bag part located outside first bag part, first bag part includes first bag outer layer membrane, second bag part includes second bag outer layer membrane, second bag inner layer membrane located inside second bag outer layer membrane, the side edge of B side of first bag outer layer membrane is fixedly connected with catheter outer wall, the side edge of A side is connected with the side edge of A side of second bag inner layer membrane, the side edge of B side of second bag inner layer membrane is connected with the side edge of B side of second bag outer layer membrane, the side edge of A side of second bag outer layer membrane is fixed with catheter outer wall;Adjacent two balloon petals form blood passage for blood flow between when balloon petal is inflated after filling fluid medium and is in inflation working condition;Catheter is equipped with filling cavity and filling port, and the inner cavity of each balloon petal is respectively communicated with at least one filling port.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a partially occluded emergency balloon. Background Technology

[0002] Resuscitative endovascular balloon occlusion of the aorta (REBOA) is a surgical procedure that typically involves percutaneously inserting a balloon catheter device into the blood vessel and then inflating it to control bleeding. Over the past decade, REBOA has been increasingly used to improve hemodynamic stability by increasing systolic blood pressure, while simultaneously controlling life-threatening bleeding before and / or during explicit surgical or endovascular interventional procedures.

[0003] In clinical practice, REBOA (Resuscitation on the Aorta) occlusion typically involves complete aortic occlusion for more than 20 minutes. Studies have shown that prolonged occlusion can have adverse effects on patients, such as organ necrosis due to insufficient blood supply. Therefore, a new application of REBOA has emerged in recent years: P-REBOA (partial resuscitative endovascular balloon occlusion of the aorta). This technique allows partial blood flow through the occluded site while simultaneously restricting blood flow to downstream organs and tissues, thus mitigating the risk of ischemia. Partial blood perfusion via the P-REBOA balloon can concentrate or direct most of the blood flow to vital organs such as the brain, heart, lungs, or other upstream organs. Simultaneously, by providing at least partial blood flow to downstream organs (such as the liver, digestive tract, kidneys, and legs), it can potentially increase the time the occlusion balloon can remain in the body.

[0004] Current P-REBOA balloon technologies mostly involve directly reducing the inflation volume of a fully inflated REBOA balloon, making the balloon smaller and resulting in incomplete occlusion within the aorta, allowing some blood flow. However, this approach presents various problems: the outer surface of the balloon may not completely adhere to the vessel wall, risking detachment from the occlusion site under blood flow and leading to occlusion failure; furthermore, directly reducing the balloon inflation volume makes it difficult to control the amount of inflation, which can vary between individual patients. Other existing technologies increase the amount of membrane used in the balloon body, allowing excess membrane to form folds even when the balloon fully inflates the vessel, further utilizing these folded channels to allow some blood flow. However, these folded channels are generally relatively narrow, making them prone to thrombosis, and the protrusions of the folds can also damage the vessel, causing secondary injury to the patient.

[0005] Because the P-REBOA balloon appeared relatively late and the related technology is still in its early stages of development, there are many technical problems that urgently need to be solved: it is easy to fall off during partial occlusion, the inflation volume is not easy to control, it is easy to generate thrombi, and it can cause damage to blood vessels. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide a partially occluded emergency balloon that allows some blood to flow through the blocked blood vessel, while the balloon is in a stable position and does not damage the blood vessel.

[0007] To achieve the above objectives, this utility model provides a partial occlusion emergency balloon, including a catheter and a balloon assembly disposed on the catheter. The balloon assembly includes multiple balloon flaps distributed circumferentially along the catheter. Before being inflated with a fluid medium, each balloon flap is in an initial folded state, including a first balloon portion connected to the outer wall of the catheter and a second balloon portion located outside the first balloon portion. The first balloon portion includes a first outer membrane and a first cavity located between the inner side of the first outer membrane and the outer wall of the catheter. The second balloon portion includes a second outer membrane, a second inner membrane located inside the second outer membrane, and a second cavity between the second outer membrane and the second inner membrane. The two sides of the balloon flaps along the circumference of the catheter are designated as side A and side B, respectively. On one side, the B side of the first outer membrane is fixedly connected to the outer wall of the catheter, the A side of the first outer membrane is connected to the A side of the second inner membrane, the B side of the second inner membrane is connected to the B side of the second outer membrane, and the A side of the second outer membrane is fixed to the outer wall of the catheter. The first and second cavities are connected on the A side. After the balloon valve is filled with fluid medium, it is in an expanded working state, and a blood channel for blood to flow is formed between two adjacent balloon valves when in the expanded working state. The inner cavities of each balloon valve in the balloon assembly are independent of each other. The catheter is provided with an filling cavity, and multiple filling ports communicating with the filling cavity are provided on the tube wall. The inner cavity of each balloon valve is connected to at least one filling port.

[0008] Furthermore, the balloon flap is made of compliant or semi-compliant materials, including but not limited to polyamide, thermoplastic polyester elastomer and polyether block polyamide.

[0009] Furthermore, the balloon flaps of the balloon assembly are equally distributed around the catheter circumferentially.

[0010] Furthermore, the balloon assembly has 2 to 6 balloon flaps.

[0011] Furthermore, the balloon flap also includes a fixing strip, and the A side of the second outer membrane and the B side of the first outer membrane are both fixedly connected to the fixing strip, which is fixedly connected to the outer wall of the catheter.

[0012] Furthermore, it also includes an inner tube fixedly disposed within the catheter, the space between the inner tube and the catheter forming a filling cavity, and the front end of the catheter used for insertion into the blood vessel is sealed with the front end of the inner tube, the front end of the inner tube being open.

[0013] Furthermore, the material of the catheter includes, but is not limited to, polyether block amide elastomer and nylon.

[0014] Furthermore, the material of the inner tube includes, but is not limited to, stainless steel SUS304, nickel-titanium materials, nylon, and polyether block polyamide.

[0015] Furthermore, it also includes a connecting mechanism, which includes a connecting seat, an filling connecting tube, and a guidewire connecting tube. The connecting seat is fixedly connected to the rear end of the catheter. One end of the filling connecting tube is installed on the connecting seat and communicates with the filling cavity inside the catheter, while the other end forms a filling interface. One end of the guidewire connecting tube is installed on the connecting seat and communicates with the inside of the inner tube, while the other end forms a guidewire inlet.

[0016] Furthermore, it also includes a contrast ring disposed on the catheter and located within the balloon assembly.

[0017] As described above, the partially occluded emergency balloon of this invention has the following beneficial effects:

[0018] 1. By setting up a balloon assembly composed of multiple balloon flaps, the balloon is in an initial folded state before entering the blood vessel. The balloon flaps are folded and adhere to the outer wall of the catheter, which is small in size and has a smooth surface, making it easy to enter the blood vessel. After entering the blood vessel, each balloon flap is independently inflated. The balloon flaps expand evenly and stably. After inflation, the balloon flaps can stably press against the inner wall of the blood vessel, thus being stably placed in the blood vessel and not easy to move. The blood channel formed between the balloon flaps allows some blood to pass through, achieving partial occlusion. Moreover, the blood channel is stable and does not have small channels like folds, so it is not easy to form thrombi.

[0019] 2. Because the balloons are processed and fixed on the outer layer of the catheter from the inside, the surface of the balloon flap is smooth after inflation. The contact position between the entire balloon assembly and the blood vessel is smooth, without any processing marks, and there will be no hard structural damage to the patient's blood vessels, thus avoiding secondary injury to the patient.

[0020] 3. When the balloon valve is made of elastic compliant or semi-compliant material, when the balloon valve is inflated and pressed against the inner wall of the blood vessel, the position of the edge of the balloon valve on side A and side B can be adjusted by adjusting the degree of inflation of the balloon valve. In other words, the size of the blood channel can be adjusted to a certain extent, thereby partially controlling the degree of occlusion. It is flexible and convenient to use.

[0021] 4. By placing an inner tube in the catheter, it is convenient for the guidewire to guide the catheter into the blood vessel, and the blood pressure can be monitored through the inner tube after the guidewire is withdrawn. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the partially occluded emergency balloon of this utility model when the balloon flap is in its initial folded state.

[0023] Figure 2 for Figure 1 CC-direction sectional view.

[0024] Figure 3This is a schematic diagram of the balloon flap in the initial folded state of this utility model.

[0025] Figure 4 This is a schematic diagram of the structure of the partially occluded emergency balloon of this utility model when the balloon flap is inflated and in working condition.

[0026] Figure 5 for Figure 4 A half-section view.

[0027] Figure 6 for Figure 4 MM-directed sectional view.

[0028] Figure 7 This is a schematic diagram of the balloon assembly, which includes four balloon flaps, working in a blood vessel according to this invention.

[0029] Explanation of icon numbers

[0030] 1. Catheter

[0031] 11. Filling cavity

[0032] 12 Filling port

[0033] 13 Pointed head

[0034] 2. Balloon flap

[0035] 21 First sac

[0036] 211 First outer membrane

[0037] 212 First cystic cavity

[0038] 22 Second sac

[0039] 221 Second outer membrane

[0040] 222 Second inner capsule membrane

[0041] 223 Second cystic cavity

[0042] 23 Fixing strip

[0043] 3. Blood channels

[0044] 4 Inner tube

[0045] 5. Connecting Mechanism

[0046] 51 Connector

[0047] 52 Filler connecting pipe

[0048] 53 Guide wire connecting tube

[0049] 6. Blood vessels Detailed Implementation

[0050] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0051] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0052] See Figures 1 to 7 This invention provides a partial occlusion emergency balloon, including a catheter 1 and a balloon assembly disposed on the catheter 1. The balloon assembly is specifically disposed at a suitable position near the front end (the end for insertion into a blood vessel 6) of the catheter 1. The balloon assembly includes multiple balloon flaps 2 distributed circumferentially along the catheter 1. Before being filled with a fluid medium, the balloon flaps 2 are in an initial folded state, including a first balloon portion 21 connected to the outer wall of the catheter 1 and a second balloon portion 22 located outside the first balloon portion 21. The first balloon portion 21 includes a first outer membrane 211 and a first cavity 212 located inside the first outer membrane 211, that is, the space between the first outer membrane 211 and the outer wall of the catheter 1 forms a second cavity 223. The second balloon portion 22 includes a second outer membrane 221 and a second cavity 212 located inside the second balloon portion 211. The second inner layer membrane 222 inside the outer membrane 221, and the second cavity 223 between the second outer membrane 221 and the second inner membrane 222, the balloon flap 2 has sides A and B along the circumference of the catheter 1, respectively. The side B of the first outer membrane 211 is fixedly connected to the outer wall of the catheter 1, the side A of the first outer membrane 211 is connected to the side A of the second inner membrane 222, the side B of the second inner membrane 222 is connected to the side B of the second outer membrane 221, and the side A of the second outer membrane 221 is fixed to the outer wall of the catheter 1. The first cavity 212 and the second cavity 223 are connected on side A, together forming the closed inner cavity of the balloon flap 2. In the initial folded state, the balloon flap 2 is shaped like a folded "<". See [reference needed]. Figure 2 and Figure 3As shown; after the balloon flap 2 is filled with fluid medium, it is in an expanded working state, and in the expanded working state, a blood channel 3 for blood flow is formed between adjacent balloon flaps 2, see [reference]. Figure 4 and Figure 5 As shown; the inner cavities of each balloon flap 2 in the balloon assembly are independent and not connected to each other; the catheter 1 is provided with an filling cavity 11 and multiple filling ports 12 connected to the filling cavity 11 are provided on the catheter wall. The interior of each balloon flap 2 is connected to at least one filling port 12. Specifically, the first balloon cavity 212 of the balloon flap 2 in the initial folded state is connected to the filling port 12.

[0053] The main working principle of the partial occlusion emergency balloon of this utility model is as follows: The partial occlusion emergency balloon is used for partial occlusion of blood vessel 6, especially for partial occlusion of arterial blood vessel 6 during P-REBOA procedure. When in use, before being inserted into blood vessel 6, the balloon flaps 2 of the balloon assembly are not filled with fluid medium and are in an initial folded state, attached to the catheter 1. The entire balloon assembly is small in size, and the outer surface is a second outer layer membrane 221 with an arc shape. The outer surface of the entire balloon assembly can be basically flat and smooth, reducing wrinkles and making it less likely to damage the inner wall of blood vessel 6 during insertion into blood vessel 6. After the balloon assembly is inserted into the designated occlusion location in blood vessel 6 via catheter 1, a suitable fluid medium is injected externally into the filling cavity 11 of catheter 1. The fluid medium enters the inner lumen of balloon flap 2 through filling port 12, and balloon flap 2 gradually inflates. Since each balloon flap 2 is independently inflated with fluid medium, and preferably the number and size of the filling ports connected to each balloon flap 2 are consistent, the balloon flaps 2 can be synchronously and uniformly inflated. After the balloon flap 2 is fully inflated in blood vessel 6, it will contact the inner wall of blood vessel 6. See [link to relevant documentation]. Figure 6 and Figure 7As shown, once inflation is complete, balloon flap 2 is in an inflated working state. This allows each balloon flap 2 of the balloon assembly to fit evenly and tightly against the inner wall of the blood vessel 6, preventing it from being washed away from the occlusion area by blood flow. Furthermore, the contact areas between balloon flap 2 and blood vessel 6 are smooth surfaces. When the fluid medium enters the balloon flap 2, the balloon assembly does not inflate into a complete spherical shape, but instead forms gaps between adjacent balloon flaps 2. These gaps constitute blood channels 3 for blood flow, thus achieving a partial occlusion effect. During occlusion, the balloon assembly allows partial blood flow, reducing the risk of ischemia in downstream organs and thus appropriately extending the occlusion treatment time, providing rescue personnel with more time for rescue. After treatment, the fluid medium in the balloon flap 2 is returned through the inflation port 12 and inflation cavity 11 of the catheter 1 via aspiration. Finally, the balloon flap 2 retracts completely, and the catheter 1 is withdrawn from the patient's body. This invention relates to a partial occlusion emergency balloon, which can be stably placed in blood vessel 6 without easily shifting, allowing some blood to pass through to achieve partial occlusion. The balloon assembly is unlikely to damage the patient's blood vessel 6, reducing secondary injury. Furthermore, when the balloon flap is made of an elastic, compliant or semi-compliant material, when the balloon flap 2 is inflated to the outer side against the inner wall of blood vessel 6, it is constrained by the inner wall of blood vessel 6. By adjusting the inflation degree of the balloon flap, the edge position of the balloon flap on sides A and B can be adjusted, which means that the size of the blood passage can be adjusted to a certain extent. This allows for partial control of the degree of occlusion, making it flexible and convenient to use.

[0054] See Figures 1 to 7 The present invention will be further described below with reference to a specific embodiment:

[0055] In this embodiment, as a preferred design, the balloon flap 2 is a thin film structure blown from a semi-compliant or compliant material. The film is preferably transparent, and specifically, its material includes, but is not limited to, polyamide (PA), thermoplastic polyester elastomer (TPU), and polyether block polyamide (PEBAX). The balloon flap 2 can also be made of a non-compliant material.

[0056] In this embodiment, as a preferred design, see [reference needed]. Figure 6 and Figure 7 The number of balloon flaps 2 in the balloon assembly can be set according to actual needs, preferably 2 to 6, and more preferably 3 to 4, and more preferably 4. The balloon flaps 2 are evenly distributed around the catheter 1. In the folded state, the orientation of each balloon flap 2 is preferably the same, that is, multiple balloon flaps 2 are arranged in a ring in the catheter 1.

[0057] In this embodiment, see Figure 6 and Figure 7 The balloon flap 2 is composed of a single, complete thin-film structure. Before entering the blood vessel 6, the lumen is aspirated and folded to achieve an initial folded state. The entire thin-film structure consists of a first outer membrane 211, a second outer membrane 221, and a second inner membrane 222. After inflation, the entire thin-film structure of the balloon flap 2 is in an extended and expanded state. Therefore, in the initial folded state, there are no fold marks between the first outer membrane 211, the second outer membrane 221, and the second inner membrane 222, and the entire surface of the balloon flap 2 is smooth, preventing damage to the blood vessel 6. More preferably, the thin-film structure of all balloon flaps 2 can also be a single, integrated structure, i.e., a large, complete thin-film structure connected to the outer wall of the catheter 1, forming multiple balloon flaps 2. The thin-film structure at the junction of two adjacent balloon flaps 2 is sealed to the outer wall of the catheter 1, thereby ensuring that the lumens of each balloon flap 2 are independent of each other. When all balloon flaps 2 are in the initial folded state, the outer surface of the balloon assembly can remain very smooth and flat. In other embodiments, the membrane structures of different balloon flaps 2 can also be independent of each other and connected to the outer wall of the catheter 1 respectively. In this case, two adjacent balloon flaps 2 are preferably close to each other.

[0058] In this embodiment, as a preferred design, see [reference needed]. Figure 3 The balloon flap 2 also includes a fixing strip 23. The A-side of the second outer membrane 221 and the B-side of the first outer membrane 211 are fixedly connected to the fixing strip 23, and the connection is sealed. The fixing strip 23 is fixedly connected to the outer wall of the catheter 1, and the connection is sealed. Preferably, the fixing strip 23 is fixed by adhesive bonding, which is convenient for installation; simply attach the two fixing strips 23 on the A and B sides to the outer wall of the catheter 1. In this embodiment, in the initial folded state, the inner side of the first balloon cavity 212 is the outer wall surface of the catheter 1, meaning the first balloon cavity 212 is directly formed by the first outer membrane 211 and the outer wall surface of the catheter 1. In other embodiments, the first balloon portion 21 may also have a first inner membrane abutting against the outer wall surface of the catheter 1. The first inner membrane and the first outer membrane 211 form the first balloon cavity 212, and the first inner membrane has an opening connected to the filling port 12.

[0059] In this embodiment, see Figure 2 and Figure 5As a preferred design, it also includes an inner tube 4 fixedly disposed within the catheter 1. The two are preferably coaxially arranged to form a double-layered tube structure. The space between the inner tube 4 and the catheter 1 constitutes an inflation cavity 11. The tip of the catheter 1, used for insertion into the blood vessel 6, seals the tip of the inner tube 4, ensuring the front end of the inflation cavity 11 is closed and does not contact the blood in the blood vessel 6. The front end of the inner tube 4 is open. In use, a guidewire is passed through the inner tube 4 to guide the catheter 1 into the blood vessel 6, allowing the catheter 1 and balloon assembly to reach the designated occlusion site. Once the balloon assembly reaches the designated position within the blood vessel 6, the guidewire is withdrawn, and the blood in the blood vessel 6 flows through the inner tube 4 to the external balloon unit. A pressure sensor can be installed within the balloon unit to monitor blood pressure in real time. The sensor detects the pressure within the blood vessel 6 through the inner tube 4 to determine the inflation status of the balloon assembly. If the pressure sensor changes, the degree or magnitude of the change can be used to determine whether the balloon assembly is incompletely inflated or has shifted.

[0060] In this embodiment, as a preferred design, the material of catheter 1 includes, but is not limited to, metallic or polymeric materials, specifically, polyether block amide elastomer (Pebax) and nylon. The outer diameter of catheter 1 can be set according to actual needs, generally about 1 / 10 of the inner diameter of blood vessel 6. Catheter 1 has a pointed tip 13 at its front end, the outer diameter of which gradually narrows from back to front, facilitating catheter 1 insertion. The front end of the pointed tip 13 is sealed, preventing the filling lumen 11 from communicating with the blood in blood vessel 6. The material of inner tube 4 includes, but is not limited to, metallic or polymeric materials, specifically, stainless steel SUS304, nickel-titanium alloy (Niti), nylon, polyether block polyamide (Pebax), etc. The outer diameter of inner tube 4 is smaller than that of catheter 1, and both its outer and inner diameters can be selected appropriately according to specific circumstances.

[0061] In this embodiment, see Figure 4 and Figure 5As a preferred design, a connecting mechanism 5 is also included. The connecting mechanism 5 includes a connecting seat 51, an inflation connecting tube 52, and a guidewire connecting tube 53. The connecting seat 51 is fixedly connected to the rear end of the catheter 1. One end of the inflation connecting tube 52 is installed on the connecting seat 51 and communicates with the inflation cavity 11 inside the catheter 1, while the other end forms an inflation interface. One end of the guidewire connecting tube 53 is installed on the connecting seat 51 and communicates with the inside of the inner tube 4, while the other end forms a guidewire inlet. The inflation connecting tube 52 and the guidewire connecting tube 53 are two independent tubes. In use, the connecting mechanism 5 is located outside the body and is used to connect with the balloon host. Specifically, the inflation interface of the inflation connecting tube 52 is used to connect with the inflation output interface in the balloon host. The fluid medium inside the balloon host is transmitted to the catheter 1 by the power device (pump) in the balloon host through the inflation interface. The guidewire inlet of the guidewire connecting tube 53 can only be connected to the sensor interface of the host after the guidewire guides the balloon assembly to the designated position and withdraws. In another embodiment, the filling connection tube 52 and the guide wire connection tube 53 can also be coaxially arranged to form a double-layer tube structure. In this case, the guide wire inlet and the filling output interface are located at one place, forming an inner and outer double-layer tube structure. Correspondingly, the sensor interface and the filling output interface are set as coaxial double-layer interfaces in the host. When in use, the guide wire inlet and the filling interface can only be connected to the host together after the guide wire is withdrawn.

[0062] In this embodiment, as a preferred design, a contrast ring (not shown in the figures) is also included, which is disposed on the catheter 1 and located within the balloon assembly. The contrast ring is made of tantalum / platinum-iridium. Preferably, two contrast rings are provided, located on both sides of the balloon assembly along the axial direction of the catheter 1, so as to facilitate in vitro monitoring of whether the balloon assembly has reached the occlusion site.

[0063] As can be seen from the above, the partial occlusion emergency balloon involved in this utility model has the following beneficial effects:

[0064] 1. By setting up a balloon assembly consisting of multiple balloon flaps 2, the balloon flaps 2 are initially folded before entering the blood vessel 6. The balloon flaps 2 are folded and attached to the outer wall of the catheter 1. They are small in size and have a smooth surface, which facilitates entry into the blood vessel 6. After entering the blood vessel 6, each balloon flap 2 is independently inflated. The balloon flaps 2 expand evenly and stably. After inflation, the balloon flaps 2 can stably abut against the inner wall of the blood vessel 6, thus being stably placed in the blood vessel 6 and not easily moving. The blood channel 3 formed between the balloon flaps 2 allows some blood to pass through, achieving partial occlusion. Moreover, the blood channel 3 is stable and does not have small channels like folds, so it is not easy to form thrombi.

[0065] 2. Because the balloons are all processed and fixed on the outer layer of the catheter, the surface of the balloon flap 2 is smooth after inflation. The contact position between the entire balloon assembly and the blood vessel 6 is smooth, without any processing marks, and there will be no hard structural damage to the patient's blood vessel 6, thus avoiding secondary injury to the patient.

[0066] 3. When balloon valve 2 is made of elastic compliant or semi-compliant material, when balloon valve 2 is filled and abuts against the inner wall of the blood vessel, the position of the edge of balloon valve 2 on side A and side B can be adjusted by adjusting the degree of filling of balloon valve 2. That is, the size of blood channel 3 can be adjusted to a certain extent, thereby partially controlling the degree of occlusion. It is flexible and convenient to use.

[0067] 4. By setting an inner tube 4 in the catheter 1, the guidewire can guide the catheter 1 into the blood vessel 6. After the guidewire is withdrawn, the blood pressure can be monitored through the inner tube 4.

[0068] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0069] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A partially occluding bailout balloon, characterized by: The device includes a catheter (1) and a balloon assembly disposed on the catheter (1). The balloon assembly includes multiple balloon flaps (2) distributed circumferentially along the catheter (1). The balloon flaps (2) are in an initial folded state before being filled with a fluid medium. They include a first balloon portion (21) connected to the outer wall of the catheter (1) and a second balloon portion (22) located outside the first balloon portion (21). The first balloon portion (21) includes a first outer membrane (211) and a first cavity (212) located between the inner side of the first outer membrane (211) and the outer wall of the catheter (1). The second balloon portion (22) includes a second outer membrane (221), a second inner membrane (222) located inside the second outer membrane (221), and a second cavity (223) between the second outer membrane (221) and the second inner membrane (222). The balloon flaps (2) have sides A and B on both sides along the circumference of the catheter (1). The B-side of the outer membrane (211) is fixedly connected to the outer wall of the catheter (1); the A-side of the first outer membrane (211) is connected to the A-side of the second inner membrane (222); the B-side of the second inner membrane (222) is connected to the B-side of the second outer membrane (221); the A-side of the second outer membrane (221) is fixed to the outer wall of the catheter (1); and the first cyst cavity (212) and the second cyst cavity (223) are connected on the A-side. The balloon flap (2) is in an expanded working state after being filled with fluid medium, and a blood channel (3) for blood to flow is formed between two adjacent balloon flaps (2) when in the expanded working state; the inner cavities of each balloon flap (2) of the balloon assembly are independent of each other; the catheter (1) is provided with a filling cavity (11), and multiple filling ports (12) communicating with the filling cavity (11) are provided on the tube wall, and the inner cavity of each balloon flap (2) is respectively connected to at least one filling port (12).

2. The partial occlusion bailout balloon of claim 1, wherein: The balloon flap (2) is made of compliant or semi-compliant materials, including polyamide, thermoplastic polyester elastomer and polyether block polyamide.

3. The partial occlusion bailout balloon of claim 1, wherein: The balloon flaps (2) of the balloon assembly are evenly distributed around the catheter (1).

4. The partial occlusion bailout balloon of any one of claims 1 to 3, wherein: The balloon assembly has 2 to 6 balloon flaps (2).

5. The partial occlusion bailout balloon of claim 1, wherein: The balloon flap (2) also includes a fixing strip (23), and the A side of the second outer membrane (221) and the B side of the first outer membrane (211) are fixedly connected to the fixing strip (23), which is fixedly connected to the outer wall of the catheter (1).

6. The partial occlusion bailout balloon of claim 1, wherein: It also includes an inner tube (4) fixedly disposed inside the catheter (1), the space between the inner tube (4) and the catheter (1) forming a filling cavity (11), and the front end of the catheter (1) used to insert into the blood vessel (6) is sealed with the front end of the inner tube (4), the front end of the inner tube (4) being open.

7. The partial occlusion bailout balloon of claim 1 or 6, wherein: The materials of the catheter (1) include polyether block amide elastomer and nylon.

8. The partial occlusion bailout balloon of claim 6, wherein: The inner tube (4) is made of stainless steel SUS304, nickel-titanium materials, nylon and polyether block polyamide.

9. The partial occlusion bailout balloon of claim 6, wherein: It also includes a connecting mechanism (5), which includes a connecting seat (51), a filling connecting tube (52) and a guide wire connecting tube (53). The connecting seat (51) is fixedly connected to the rear end of the catheter (1). One end of the filling connecting tube (52) is installed on the connecting seat (51) and communicates with the filling cavity (11) inside the catheter (1), and the other end forms a filling interface. One end of the guide wire connecting tube (53) is installed on the connecting seat (51) and communicates with the inside of the inner tube (4), and the other end forms a guide wire inlet.

10. The partial occlusion bailout balloon of claim 1, wherein: It also includes a radiopaque ring disposed on the catheter (1) and located within the balloon assembly.

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