Balloon-assisted adjustable catheter and guide wire

Abstract

The balloon-assisted adjustable catheter comprises an outer tube and a balloon guide wire, an inner tube is arranged in the outer tube, an inclined tube is arranged at the tail end of the outer tube, a first balloon is arranged at the front end of the outer tube, a deformable area is arranged at the front end of the first balloon, and the front end of the deformable area is connected with a hard portion and a catheter end. The balloon guide wire comprises a wire tube, a second balloon is arranged at the front end of the wire tube, and a guide wire end is arranged at the front end of the second balloon. The outer tube and the inner tube can be anchored to the inner wall of a blood vessel by controlling expansion of the first balloon, the wire tube can be anchored to the hard portion of the outer tube by controlling expansion of the second balloon, acting force is applied to the hard portion through the wire tube and the second balloon, then the deformable area is bent, the direction of the catheter end is adjusted, and the catheter end can penetrate into the blood vessel conveniently. The camber and orientation of the catheter can be flexibly adjusted, the head end of the catheter is stretched and lengthened, the catheter can conveniently stretch into a blood vessel, and the surgical operation difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a balloon-assisted adjustable catheter and guidewire. Background Technology

[0002] In neurovascular interventional therapy, catheters and guidewires need to be inserted along the nerves and blood vessels. The catheter is then delivered to the lesion area, and the testing equipment is delivered to the lesion area through the catheter for testing. Traditional catheters and guidewires are too simple in structure and do not have bending capabilities. During intervention, the doctor can only rely on his skillful technique to perform the intervention. However, because blood vessels are intertwined, the catheter is easy to get stuck in the blood vessel crossing or deformable area when it is inserted, which increases the difficulty of the operation, prolongs the operation time, and increases the risk of the operation. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a balloon-assisted adjustable catheter and guidewire to solve problems such as the overly simple structure of existing catheters and guidewires, lack of bending function, easy obstruction of catheters in vascular crossings or deformable areas, increased surgical difficulty, prolonged operation time, and increased surgical risks.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a balloon-assisted adjustable catheter and guidewire, comprising an outer tube open at both ends and a balloon guidewire. An inner tube is coaxially disposed within the outer tube, and both ends of the inner tube are sealed and bonded to the inner wall of the outer tube. The inner tube contains a first cavity, and the gap between the inner tube and the outer tube forms a second cavity. An inclined tube is disposed at the end of the outer tube, communicating with the second cavity. A first balloon is disposed at the front end of the outer tube, and a deformable region fixedly connected to the outer tube is disposed at the front end of the first balloon. A rigid part and a catheter tip are fixedly connected to the front end of the deformable region.

[0005] The balloon guidewire includes a tubing, with a second balloon at the front end of the tubing, and a guidewire tip fixedly connected to the tubing at the front end of the second balloon.

[0006] Preferably, the front end of the inner tube is close to the deformable region, and the rear end of the inner tube is close to the rear end of the outer tube.

[0007] Preferably, the outer tube is recessed inward near the deformable region to form three recesses, which are evenly distributed in a ring. The first balloon is fixed in the recesses, and a first through hole is provided at the bottom of the recesses to connect the first balloon and the second cavity. By providing the first through hole, the first balloon is connected to the second cavity, so that liquid can be injected into or extracted into the first balloon through the second cavity, thereby controlling the expansion and contraction of the first balloon.

[0008] Preferably, the deformable region is a woven mesh structure made of deformable stainless steel wire or nickel-titanium wire. This design allows the deformable region to bend under external force, enabling the conduit port to rotate and facilitating the insertion of the outer tube.

[0009] Preferably, the second balloon has a second through hole communicating with the tubing. By providing the second through hole, the second balloon can communicate with the inner lumen of the tubing, allowing liquid to be injected into or extracted from the second balloon through the lumen of the tubing, thereby controlling the expansion and contraction of the second balloon.

[0010] This invention provides a balloon-assisted adjustable catheter and guidewire, which has the following advantages:

[0011] This invention controls the expansion of the first balloon to anchor the outer and inner tubes to the inner wall of the blood vessel. By controlling the expansion of the second balloon, the wire can be anchored to the rigid part of the outer tube. The wire and the second balloon apply force to the rigid part, causing the deformable area to bend and thus adjusting the direction of the catheter tip, facilitating the insertion of the catheter tip. This device can flexibly adjust the curvature and orientation of the catheter, stretch and extend the catheter tip, making it easier for the catheter to enter the blood vessel, reducing the difficulty of the surgical operation, and reducing the operation time and risk. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the outer tube and inner tube of this utility model;

[0014] Figure 3 This is a schematic diagram of the balloon guidewire of this utility model;

[0015] Figure 4 This is a schematic diagram of the front end of the outer tube of this utility model;

[0016] Figure 5 This is a schematic diagram of the front end of the balloon guidewire of this utility model.

[0017] In the picture:

[0018] 1. Outer tube; 2. Inner tube; 3. First cavity; 4. Second cavity; 5. Inclined tube; 6. Recessed part; 7. First balloon; 8. First through hole; 9. Deformable area; 10. Rigid part; 11. Catheter tip; 12. Wire tube; 13. Second balloon; 14. Guidewire tip; 15. Second through hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-5 This utility model provides a technical solution: a balloon-assisted adjustable catheter and guidewire, including an outer tube 1 with openings at both ends and a balloon guidewire. An inner tube 2 is coaxially arranged inside the outer tube 1. The two ends of the inner tube 2 are sealed and bonded to the inner wall of the outer tube 1. The inner tube 2 has a first cavity 3. The gap between the inner tube 2 and the outer tube 1 is a second cavity 4. An inclined tube 5 is provided at the end of the outer tube 1. The inclined tube 5 communicates with the second cavity 4. A first balloon 7 is provided at the front end of the outer tube 1. A deformable area 9 is provided at the front end of the first balloon 7 and is fixedly connected to the outer tube 1. A rigid part 10 and a catheter tip 11 are fixedly connected at the front end of the deformable area 9.

[0021] The balloon guidewire includes a tubing 12, with a second balloon 13 at the front end of the tubing 12, and a guidewire tip 14 fixedly connected to the tubing 12 at the front end of the second balloon 13.

[0022] In this embodiment, the front end of the inner tube 2 is close to the deformable region 9, and the rear end of the inner tube 2 is close to the rear end of the outer tube 1.

[0023] In this embodiment, the outer tube 1 is recessed inward near the deformable region 9 to form three recesses 6. The recesses 6 are evenly distributed in a ring. The first balloon 7 is fixed in the recesses 6, and the bottom of the recesses 6 is provided with a first through hole 8 for connecting the first balloon 7 and the second cavity 4. By providing the first through hole 8, the first balloon 7 is connected to the second cavity 4, so that liquid can be injected or extracted into the first balloon 7 through the second cavity 4, thereby controlling the expansion and contraction of the first balloon 7.

[0024] In this embodiment, the deformable region 9 is a woven mesh structure made of deformable stainless steel wire or nickel-titanium wire. This design allows the deformable region 9 to bend when subjected to external forces, enabling the conduit port to turn and facilitating the insertion of the outer tube 1.

[0025] In this embodiment, the second balloon 13 has a second through hole 15 communicating with the tubing 12. By providing the second through hole 15, the second balloon 13 can communicate with the inner cavity of the tubing 12, thereby allowing liquid to be injected into or extracted from the second balloon 13 through the cavity of the tubing 12, thus controlling the expansion and contraction of the second balloon 13.

[0026] Working principle:

[0027] In practical use, two syringes filled with liquid are connected to the rear ends of the inclined tube 5 and the wire tube 12 via a three-way connector. Then, a femoral artery puncture is performed, and a catheter sheath is inserted into the femoral artery. The outer tube 1 is then inserted into the blood vessel through the catheter sheath. When the catheter tip 11 of the outer tube 1 encounters a vascular intersection or a tortuous vessel and cannot proceed further, liquid is injected into the inclined tube 5 through the syringe. The liquid passes through the second cavity 4 and the first through-hole 8 into the first balloon 7, causing the first balloon 7 to inflate until it adheres tightly to the vessel wall. The first balloon 7 is used as an anchor point to fix the outer tube 1. The balloon guidewire is then inserted into the first cavity 3. If the balloon guidewire can directly ascend through the vascular intersection or tortuous vessel, the liquid is aspirated using the injected fluid, causing the first balloon 7 to contract, allowing the outer tube 1 to ascend along the balloon guidewire to reach the next... If the balloon guidewire has difficulty ascending and cannot pass through the blood vessel intersection or tortuous blood vessel, the second balloon 13 is extended to the rigid part 10 of the outer tube 1. Liquid is injected into the wire tube 12 through the syringe. The liquid enters the second balloon 13 through the second through hole 15, causing the second balloon 13 to inflate until it is tightly attached to the rigid part 10. The second balloon 13 is used as an anchor point to fix the balloon guidewire. Different pushing and pulling forces are applied to the rigid part 10 through the wire tube 12 and the second balloon 13 to deform the deformable area 9 until the catheter tip 11 faces the direction of the blood vessel to be penetrated. At the same time, the first balloon 7 is contracted using the syringe. During the bending process of the outer tube 1, the outer tube 1 is directly extended deeper. Then, the second balloon 13 is contracted using the syringe, allowing the outer tube 1 to continue to penetrate deeper along the blood vessel.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A balloon-assisted adjustable catheter and guidewire, characterized in that: The device includes an outer tube (1) with openings at both ends and a balloon guidewire. An inner tube (2) is coaxially arranged inside the outer tube (1). The two ends of the inner tube (2) are sealed and bonded to the inner wall of the outer tube (1). The inner tube (2) contains a first cavity (3). The gap between the inner tube (2) and the outer tube (1) is a second cavity (4). An inclined tube (5) is provided at the end of the outer tube (1). The inclined tube (5) communicates with the second cavity (4). A first balloon (7) is provided at the front end of the outer tube (1). A deformable area (9) is provided at the front end of the first balloon (7) and is fixedly connected to the outer tube (1). A rigid part (10) and a catheter tip (11) are fixedly connected at the front end of the deformable area (9). The balloon guidewire includes a tubing (12), and a second balloon (13) is provided at the front end of the tubing (12). The front end of the second balloon (13) is provided with a guidewire tip (14) that is fixedly connected to the tubing (12).

2. The balloon-assisted adjustable catheter and guidewire according to claim 1, characterized in that: The front end of the inner tube (2) is close to the deformable region (9), and the rear end of the inner tube (2) is close to the rear end of the outer tube (1).

3. The balloon-assisted adjustable catheter and guidewire according to claim 1, characterized in that: The outer tube (1) is recessed inward near the deformable area (9) to form three recesses (6). The recesses (6) are evenly distributed in a ring. The first balloon (7) is fixed in the recesses (6). The bottom of the recesses (6) is provided with a first through hole (8) for connecting the first balloon (7) and the second cavity (4).

4. The balloon-assisted adjustable catheter and guidewire according to claim 1, characterized in that: The deformable region (9) is a woven mesh structure made of deformable stainless steel wire or nickel-titanium wire.

5. The balloon-assisted adjustable catheter and guidewire according to claim 1, characterized in that: The second balloon (13) has a second through hole (15) that communicates with the wire tube (12).

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