A guiding catheter with an anchoring balloon

Abstract

This utility model discloses a guiding catheter with an anchoring balloon, comprising an inner tube, a catheter seat fitted to the proximal end of the guiding catheter, an outer tube fitted around the periphery of the inner tube, and an anchoring balloon disposed at the distal end of the outer tube. The anchoring balloon has a folded and rolled state and an inflated state. Before the guiding catheter enters the coronary artery and reaches the coronary artery opening, it is in a folded and rolled state to facilitate the distal end of the guiding catheter entering the coronary artery and smoothly reaching the coronary artery opening. After the distal end of the guiding catheter reaches the coronary artery opening, the anchoring balloon is inflated to fix it at the coronary artery opening, preventing the guiding catheter from slipping and causing the distal end of the guiding catheter to detach from the position of the coronary artery opening. This ensures the stability of the guiding catheter within the coronary artery, thereby ensuring that the guiding catheter provides sufficient support and assisting other medical devices to smoothly reach the target lesion location through the guiding catheter.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a guiding tube with an anchoring balloon. Background Technology

[0002] During coronary intervention, medical devices such as guidewires, balloon catheters, and stent systems are delivered to the target lesion site via a guiding catheter. Due to structural limitations, the guiding catheter itself has insufficient support, and the devices encounter resistance from the vessel wall during delivery. The reaction force of pushing the devices can cause the tip of the guiding catheter to leave the coronary ostium, preventing the devices from reaching the target location smoothly. This increases the operation time, may require replacement of the guiding catheter, or may lead to surgical failure. Utility Model Content

[0003] Therefore, this invention aims to solve the problem that the existing guide tubes have insufficient support during the delivery of instruments, which prevents the instruments from reaching the target position smoothly, and thus provides a guide tube with an anchoring balloon.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A guiding tube with an anchoring balloon includes an inner tube, an outer tube sleeved around the outer periphery of the inner tube, and an anchoring balloon disposed at the distal end of the outer tube. The gap between the outer tube and the inner tube forms a medium filling channel. The anchoring balloon communicates with the medium filling channel. After the inner cavity is filled, the anchoring balloon can be radially outward relative to the outer tube and anchored at the target position.

[0006] Furthermore, a developing head end is provided at the distal end of the inner tube;

[0007] The distal end of the anchoring balloon is fixedly connected to the end of the imaging head, and the proximal end of the anchoring balloon is sealed to the distal end of the outer tube; or,

[0008] The distal end of the outer tube is sealed to the end of the developing head. The outer tube is provided with a through hole, which connects the inner cavity of the anchoring balloon and the medium filling channel outside the inner tube.

[0009] Furthermore, the inner tube includes a torsion control section, a flexural resistance section, and a flexible section arranged sequentially from the proximal end to the distal end. The torsion control section is a rigid tube, and the flexible section is a flexible tube.

[0010] Furthermore, the hardness of the torsion control section is greater than that of the bending resistance section, the hardness of the bending resistance section is greater than that of the flexible section, and the hardness of the flexible section is greater than that of the developing head end.

[0011] Furthermore, a developing head end is provided at the distal end of the inner tube, and the hardness of the developing head end is less than that of the soft segment.

[0012] Furthermore, the length of the anchoring balloon is 5mm-15mm.

[0013] Furthermore, the diameter of the inflated anchoring balloon is 1-8 mm.

[0014] Furthermore, the proximal ends of the inner tube and the outer tube are connected to a catheter seat, the catheter seat having a first connector and a second connector, the internal channel of the first connector communicating with the inner tube, and the internal channel of the second connector communicating with the medium filling channel between the outer tube and the inner tube.

[0015] Furthermore, the conduit seat is also provided with a third connector, which is used to connect the outer tube.

[0016] Furthermore, the third connector is fixedly connected to the proximal end of the outer tube by a reinforcing member.

[0017] Furthermore, the outer tube is inserted into the third connector, and the reinforcing member is a rigid pipe sleeved on the outer tube and the third connector.

[0018] The technical solution of this utility model has the following advantages:

[0019] 1. The guiding catheter with an anchoring balloon provided by this utility model, by setting an anchoring balloon with a folded and rolled state and an inflated state, can be in a folded and rolled state before entering the coronary artery and reaching the coronary artery opening, so as to facilitate the distal end of the guiding catheter to enter the coronary artery and reach the coronary artery opening smoothly; after the distal end of the guiding catheter reaches the coronary artery opening, the anchoring balloon is inflated to fix it at the coronary artery opening, preventing the guiding catheter from slipping and causing the distal end of the guiding catheter to leave the position of the coronary artery opening, thus ensuring the stability of the guiding catheter in the coronary artery, thereby ensuring that the guiding catheter provides sufficient support and assisting other medical devices to reach the target lesion location smoothly through the guiding catheter.

[0020] 2. The guiding catheter with an anchoring balloon provided by this utility model has a flexible tube at the imaging tip. This design allows it to better conform to the direction of the blood vessel at its bends, ensuring that the guiding catheter can accurately and non-invasively enter the coronary artery, thus improving the safety and success rate of the procedure.

[0021] 3. The guiding catheter with an anchoring balloon provided by this utility model includes an inner tube comprising a torsion control section, a flexure-resistant section, and a flexible section arranged sequentially from proximal to distal. The torsion control section is a rigid tube, and the flexible section is a flexible tube. This arrangement ensures stable support and torsional strength during device delivery by providing a rigid torsion control section, while the flexible distal end ensures compliance when the guiding catheter enters the coronary artery, reducing rigid stimulation to the blood vessel and lowering the risk of vascular injury.

[0022] 4. The guiding catheter with an anchoring balloon provided by this utility model has a torsion control section with greater rigidity than the anti-bend section, and the anti-bend section with greater rigidity than the flexible section. This design reduces the flexibility of the distal end of the guiding catheter in the flexible section, ensuring gentleness during operation and coaxiality with the blood vessel; the anti-bend section absorbs the torque between the rigid torsion control section and the flexible section, preventing the guiding catheter from bending; and the torsion control section ensures precise torque transmission and provides stable support.

[0023] 5. The guiding catheter with an anchoring balloon provided by this utility model has a contrast-enhancing tip at the distal end of the inner tube, the hardness of which is less than that of the soft segment. This design allows the operator to easily observe and determine whether the instrument has reached the target position; the lower hardness of the contrast-enhancing tip compared to the soft segment allows it to better conform to the vessel's direction at bends, ensuring precise and non-invasive entry into the coronary artery, thus improving surgical safety and success rate.

[0024] 6. The present invention provides a guiding catheter with an anchoring balloon. The catheter seat includes a first connector and a second connector. The first connector communicates with an inner tube, and the second connector communicates with an outer tube. This configuration allows the first connector, connected to the inner tube, to form a channel for delivering the device, while the second connector, connected to the outer tube, forms a channel for delivering filling material to inflate the anchoring balloon. Simultaneously, while delivering the device through the outer tube, the stability of the anchoring balloon's inflation state is ensured, thereby maintaining the stability of the delivered device.

[0025] 7. The guiding catheter with an anchoring balloon provided by this utility model has its distal end of the catheter seat fixedly connected to the proximal end of the outer tube via a reinforcing member. This design effectively avoids twisting and bending of the guiding catheter body at the connection point with the catheter seat, thus improving the controllability of the guiding catheter. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the guiding tube with an anchoring balloon provided by this utility model;

[0028] Figure 2 This is a schematic diagram of the catheter hub structure;

[0029] Figure 3 This is a schematic diagram showing the connection between the inner and outer tubes.

[0030] Explanation of reference numerals in the attached diagram: 1. Inner tube; 2. Outer tube; 3. Catheter hub; 4. Anchoring balloon; 5. Balloon tube foot; 6. First connector; 7. Second connector; 8. Reinforcing member; 9. Torsion control section; 10. Anti-bending section; 11. Soft section; 12. Imaging head end; 13. Third connector. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0035] like Figures 1-3 The guide tube shown includes an inner tube 1, an outer tube 2 sleeved around the outer periphery of the inner tube 1, and an anchoring balloon 4 disposed at the distal end of the outer tube 2. The gap between the outer tube 2 and the inner tube 1 forms a medium filling channel. The anchoring balloon 4 is connected to the medium filling channel. After the inner cavity is filled, the anchoring balloon 4 can be filled radially outward relative to the outer tube 2 and anchored at the target position.

[0036] This type of guiding catheter with an anchoring balloon, by setting an anchoring balloon 4 in both a folded and inflated state, allows the guiding catheter to be in a folded and inflated state before entering the coronary artery and reaching the coronary artery ostium. This facilitates the distal end of the guiding catheter entering the coronary artery and smoothly reaching the coronary artery ostium. After the distal end of the guiding catheter reaches the coronary artery ostium, the anchoring balloon 4 is inflated to fix it at the coronary artery ostium, preventing the guiding catheter from slipping and causing the distal end of the guiding catheter to detach from the coronary artery ostium. This ensures the stability of the guiding catheter within the coronary artery, thereby ensuring that the guiding catheter provides sufficient support and assisting other medical devices to smoothly reach the target lesion location through the guiding catheter.

[0037] In this embodiment, the distal end of the inner tube 1 is provided with a radiopaque tip 12; the distal end of the anchoring balloon 4 is fixedly connected to the radiopaque tip 12, and the proximal end of the anchoring balloon 4 is fixedly connected to the distal end of the outer tube 2. Specifically, the radiopaque tip 12 is a flexible tube. This configuration allows for real-time radiopaque imaging of the radiopaque tip 12 using X-rays during catheter implantation, facilitating precise tracking of the catheter's position and course within the blood vessel by the physician, and preventing accidental entry into other blood vessels.

[0038] In an alternative embodiment, the distal end of the outer tube 2 is fixedly connected to the imaging head end 12. The outer tube 2 has a through hole that connects the inner cavity of the anchoring balloon 4 and the media filling channel outside the inner tube 1. In this embodiment, the inner tube 1 includes a torsion control section 9, a flexure-resistant section 10, and a flexible section 11 arranged sequentially from the proximal end to the distal end. The torsion control section 9 is a rigid tube, and the flexible section 11 is a flexible tube. This arrangement ensures that the rigid torsion control section 9 on the guiding tube provides stable support and torsional strength during device delivery, while the flexible tube at the distal end ensures compliance when the guiding tube enters the coronary artery, reducing rigid stimulation to the blood vessel and lowering the risk of vascular injury.

[0039] Specifically, the rigidity of the torsion control segment 9 is greater than that of the anti-bending segment 10, the rigidity of the anti-bending segment 10 is greater than that of the flexible segment 11, and the rigidity of the flexible segment 11 is greater than that of the imaging tip 12. This configuration ensures that the highly flexible imaging tip 12 allows for precise and non-invasive insertion of the guiding catheter and provides a reliable reference for measuring vessel size. The flexible segment 11 reduces the flexibility of the distal end of the guiding catheter, ensuring gentleness during operation and coaxiality with the vessel. The anti-bending segment 10 absorbs the torque between the rigid torsion control segment 9 and the flexible segment 11, preventing the guiding catheter from bending. The rigidity of the torsion control segment 9 ensures precise torque transmission and provides stable support.

[0040] In one embodiment, the anchoring balloon 4 is integrally formed on the distal end of the outer tube 2, and the distal end of the anchoring balloon 4 is fixed to the outer periphery of the developing head end 12 via balloon feet 5. This arrangement ensures the sealing of the anchoring balloon 4. Specifically, the anchoring balloon 4 is made of low-compliance materials such as nylon, polyethylene, polyethylene terephthalate, and polyurethane, and the outer tube 2 is made of the same material as the anchoring balloon 4; the diameter of the anchoring balloon 4 in its inflated state is 1mm-8mm, and the length of the anchoring balloon 4 in its inflated state is 5mm-10mm. A hydrophilic coating is provided on the outer peripheral wall of the outer tube 2.

[0041] In this embodiment, the catheter hub 3 includes a first connector 6 and a second connector 7. The first connector 6 is connected to the inner tube 1, and the second connector 7 is connected to the outer tube 2. This arrangement allows the first connector 6 to connect with the inner tube 1 to form a channel for delivering the device, and the second connector 7 to connect with the outer tube 2 to form a channel for delivering filling material to inflate the anchoring balloon 4. While delivering the device through the outer tube 2, the stability of the inflated state of the anchoring balloon 4 is ensured, thereby maintaining the stability of the device delivery.

[0042] Specifically, the catheter hub 3 is a Y-type three-way connector, supported by high-polymer materials such as PC / ABS / PP. The proximal end of the first connector 6 is suitable for inserting or delivering instruments, and the proximal end of the second connector 7 is suitable for connecting a pressure pump. Specifically, the spaced gap between the inner tube 1 and the outer tube 2 facilitates the injection of filling fluids such as saline into the anchoring balloon 4 to ensure the anchoring balloon 4 is inflated.

[0043] In this embodiment, the catheter seat 3 also includes a third connector 13 connected to the outer tube 2, and the third connector 13 is fixedly connected to the proximal end of the outer tube 2 via a reinforcing member 8. Specifically, the outer tube 2 is inserted into the distal end of the third connector 13, and the reinforcing member 3 is a rigid pipe sleeved on the outside of the outer tube 2 and the third connector 13. With this arrangement, the rigid pipe of the reinforcing member 8 can effectively prevent twisting and bending at the connection between the outer tube 2 and the third connector 13, thereby effectively improving the controllability of the catheter.

[0044] In this embodiment, the distal end of the catheter seat 3 is fixedly connected to the proximal end of the outer tube 2 via a reinforcing member 8. This arrangement prevents the guide tube body from twisting or bending at the connection point with the catheter seat 3 during the guiding process. Specifically, the inner tube 1 and the catheter seat 3 are fixed together with instant adhesive, and the outer tube 2 and the catheter seat 3 are also fixed together with instant adhesive. In an alternative embodiment, the reinforcing member 8 is made of heat-shrinkable material, which can shrink its inner and outer diameters (heat shrinkage ratio of 1.5-3:1) after heating to 100-150 degrees Celsius, thereby sealing the connection between the catheter seat 3 and the outer tube 2.

[0045] In summary, this type of guiding catheter with an anchoring balloon, by setting the anchoring balloon 4 in both a folded and inflated state, allows the guiding catheter to be in a folded and inflated state before entering the coronary artery and reaching the coronary artery ostium. This facilitates the distal end of the guiding catheter entering the coronary artery and smoothly reaching the coronary artery ostium. After the distal end of the guiding catheter reaches the coronary artery ostium, the anchoring balloon 4 is inflated to fix it at the coronary artery ostium, preventing the guiding catheter from slipping and causing the distal end of the guiding catheter to detach from the coronary artery ostium. This ensures the stability of the guiding catheter within the coronary artery, thereby ensuring that the guiding catheter provides sufficient support and assisting other medical devices to smoothly reach the target lesion location through the guiding catheter.

[0046] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A guiding catheter with an anchoring balloon, characterized in that, It includes an inner tube (1), an outer tube (2) sleeved around the outer periphery of the inner tube (1), and an anchoring balloon (4) disposed at the distal end of the outer tube (2). The gap between the outer tube (2) and the inner tube (1) forms a medium filling channel. The anchoring balloon (4) is connected to the medium filling channel. After the inner cavity is filled, the anchoring balloon (4) can be filled radially outward relative to the outer tube (2) and anchored at the target position.

2. The guiding tube with an anchoring balloon according to claim 1, characterized in that, The inner tube (1) is provided with a developing head end (12) at its distal end; The distal end of the anchoring balloon (4) is sealed to the imaging head end (12), and the proximal end of the anchoring balloon (4) is sealed to the distal end of the outer tube (2); or, The distal end of the outer tube (2) is sealed to the developing head end (12). The outer tube (2) is provided with a through hole, which connects the inner cavity of the anchoring balloon (4) and the medium filling channel outside the inner tube (1).

3. The guiding tube with an anchoring balloon according to claim 2, characterized in that, The inner tube (1) includes a torsion control section (9), a flexural section (10), and a flexible section (11) arranged sequentially from the proximal end to the distal end. The torsion control section (9) is a rigid tube, and the flexible section (11) is a flexible tube.

4. The guiding tube with an anchoring balloon according to claim 3, characterized in that, The hardness of the torsion control section (9) is greater than that of the bending resistance section (10), the hardness of the bending resistance section (10) is greater than that of the soft section (11), and the hardness of the soft section (11) is greater than that of the developing head end (12).

5. The guiding tube with an anchoring balloon according to claim 1, characterized in that, The length of the anchoring balloon (4) is 5-15 mm.

6. The guiding tube with an anchoring balloon according to claim 1, characterized in that, The diameter of the anchoring balloon (4) after inflation is 1-8 mm.

7. The guiding tube with an anchoring balloon according to claim 1, characterized in that, The proximal ends of the inner tube (1) and the outer tube (2) are connected to a conduit seat (3). The conduit seat (3) is provided with a first connector (6) and a second connector (7). The internal channel of the first connector (6) is connected to the inner tube (1), and the internal channel of the second connector (7) is connected to the medium filling channel between the outer tube (2) and the inner tube (1).

8. The guiding tube with an anchoring balloon according to claim 7, characterized in that, The conduit seat (3) is also provided with a third connector (13), which is used to connect the outer tube (2).

9. The guiding tube with an anchoring balloon according to claim 8, characterized in that, The third connector (13) is fixedly connected to the proximal end of the outer tube (2) via a reinforcing member (8).

10. The guiding tube with an anchoring balloon according to claim 9, characterized in that, The outer tube (2) is inserted into the third connector (13), and the reinforcing member (8) is a rigid pipe sleeved on the outer tube (2) and the third connector (13).

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