Balloon catheter

Abstract

This utility model belongs to the field of medical devices, and specifically relates to a balloon catheter. The balloon catheter includes: a balloon; a first tube body, one end of which is connected to the balloon, and the other end of the first tube body away from the balloon forming an inflation port for inflating the balloon; a second tube body disposed within the first tube body; one end of the second tube body extending out of the first tube body and located on the side of the balloon to form an output port for delivering materials or drugs, and the other end of the second tube body away from the output port extending out of the first tube body to form an input port for delivering materials or drugs; and a third tube body connected to the end of the balloon body away from the first tube body. In this utility model, when performing chemical ablation, this balloon catheter does not need to be inserted into the target blood vessel, allowing for drug delivery and ablation of branch blood vessels that cannot be reached by other medical devices. Simultaneously, it can ablate the opening of the target blood vessel, resulting in more complete ablation and reducing the recurrence rate of the disease.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, and specifically relates to a balloon catheter. Background Technology

[0002] Chemical ablation, a minimally invasive surgical technique, aims to induce necrosis in a target area of ​​the heart by precisely injecting ablation agents (such as anhydrous ethanol) into specific blood vessels. Its applications are wide-ranging. It can be used to inject anhydrous ethanol into the septal branch of the coronary artery to cause necrosis of the ventricular septum in that blood-supplying area, relieving left ventricular outflow tract obstruction and mitral regurgitation, thereby improving symptoms of heart failure. It can also be performed via the Marshall vein to improve the success rate of catheter ablation in persistent atrial fibrillation. See also Figure 1-3 During this process, the blood vessel is sealed using an OTW balloon inflation method to ensure that anhydrous ethanol acts only on the predetermined site and avoids unnecessary damage to the surrounding healthy tissue. However, this therapy also faces challenges: when the guidewire is difficult to reach the target location, it will directly hinder the execution of the chemical ablation operation; or due to the limitation of the length of the balloon catheter itself, complete ablation cannot be achieved at the opening of the blood vessel, thereby increasing the risk of disease recurrence. Utility Model Content

[0003] To address the aforementioned problems, the present invention aims to provide a balloon catheter that, during operation, eliminates the need to insert the balloon catheter into the target blood vessel. Instead, it only requires confirming that the balloon catheter outlet is located at the opening of the target blood vessel to inflate the balloon and inject medication into the target blood vessel through the outlet.

[0004] Another objective of this invention is to provide a balloon catheter that can also ablate the opening of a target blood vessel, thereby reducing the recurrence rate of the disease.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows.

[0006] A balloon catheter comprising:

[0007] balloon;

[0008] A first tube, one end of which is connected to the balloon, and the other end of the first tube away from the balloon has an inflation port for inflating the balloon.

[0009] The second tube is disposed inside the first tube; one end of the second tube extends out of the first tube and is located on the side of the balloon to form an outlet for outputting materials or drugs, and the other end of the second tube away from the outlet extends out of the first tube to form an inlet for inputting materials or drugs.

[0010] A third tube is used to pass through the guidewire, the third tube being connected to the end of the balloon away from the first tube.

[0011] In this balloon catheter, through the structural cooperation of the first tube body, the second tube body, and the balloon, the balloon catheter simultaneously functions as a delivery catheter and a balloon catheter, which reduces the number of instruments that doctors need to operate during treatment and can effectively reduce the difficulty of operation for doctors.

[0012] In practice, there is no need to insert the balloon catheter into the target blood vessel. Simply ensure the outlet of the balloon catheter is aligned with the opening of the target blood vessel before inflating the balloon. Then, chemical ablation drugs are injected directly into the target blood vessel through this outlet to perform the chemical ablation procedure. This allows for effective drug ablation of branch vessels that are difficult to access with other medical devices, and enables targeted ablation of the target blood vessel opening, thereby improving the thoroughness of the ablation and reducing the recurrence rate.

[0013] Furthermore, a filling cavity for filling is formed in the gap between the first tube and the second tube, and the two ends of the filling cavity are respectively connected to the filling port and the balloon; a delivery cavity for inputting materials or drugs is provided in the second tube, and the two ends of the delivery cavity are respectively connected to the input port and the output port.

[0014] Furthermore, a guidewire lumen is formed within the third tube body. One end of the guidewire lumen penetrates the side of the third tube body to form a guidewire outlet, and the other end of the guidewire lumen penetrates the end of the third tube body away from the balloon to form a guidewire inlet. The guidewire is inserted from the guidewire inlet into the guidewire lumen and exits from the guidewire outlet, allowing the third tube body to move with the guidewire, thereby guiding the balloon catheter to the target location of the designated blood vessel.

[0015] Furthermore, the balloon catheter also includes a support wire, which is located within the filling lumen, the delivery lumen, or the wall of the second tubing. The support wire is used to support the balloon catheter.

[0016] Furthermore, the balloon catheter also includes a catheter hub, which includes a first port, a second port, and a third port. The first and second tube bodies both extend into the catheter hub from the first port. The inflation port is located at the second port, and the inlet port is located at the third port. Materials or drugs can be introduced through the inlet port at the third port; the balloon can be inflated through the inflation port at the second port.

[0017] Furthermore, the two ends of the support wire correspond to the guide tube seat and the third tube body, respectively.

[0018] Furthermore, the balloon catheter also includes a stress-relieving tube, which is disposed at the first port and sleeved outside the first tube body.

[0019] Furthermore, a marker is provided at the balloon.

[0020] Furthermore, the marking element is a marking ring.

[0021] The beneficial effects of this invention are that, through the structural cooperation of the first tube body, the second tube body, and the balloon, the balloon catheter simultaneously functions as both a delivery catheter and a balloon catheter, reducing the number of instruments required by the doctor during treatment and effectively lowering the difficulty of the procedure. Furthermore, it allows for effective drug ablation of difficult-to-access branch vessels and can target the opening of the target vessel for ablation, thereby improving the thoroughness of ablation and reducing the recurrence rate of the disease. Attached Figure Description

[0022] Figure 1 This is a schematic diagram illustrating the difficulty of guidewires entering branch vessels.

[0023] Figure 2 This is a schematic diagram of a conventional chemical ablation method.

[0024] Figure 3 This is a schematic diagram showing how conventional chemical ablation can prevent the opening area from being ablated.

[0025] Figure 4 This diagram illustrates how this structure can be used to ablate blood vessel openings.

[0026] Figure 5 This is a schematic diagram of the structure of this utility model.

[0027] Figure 6 When the support wire is located inside the wall of the second tube body Figure 4 A-A cross-sectional view.

[0028] Figure 7 When the support wire is located inside the filling cavity Figure 4 A-A cross-sectional view.

[0029] Figure 8 When the support wire is located inside the delivery chamber Figure 4 A-A cross-sectional view.

[0030] Figure 9 This is a schematic diagram illustrating the structure of the support wire and the third tube.

[0031] Figure 10 It is a schematic diagram illustrating the structure of the support wire, guide tube seat, first tube body, and second tube body.

[0032] Figure 11 When the support wire is located inside the second tube Figure 10 BB cross-sectional view.

[0033] Figure 12 When the support wire is located inside the filling cavity Figure 10 BB cross-sectional view.

[0034] Figure 13 When the support wire is located inside the delivery chamber Figure 10 BB cross-sectional view.

[0035] Figure 14 When the support wire is located inside the second tube Figure 10 CC section view.

[0036] Figure 15 When the support wire is located inside the catheter seat Figure 10 CC section view.

[0037] Figure 16 When the support wire is located inside the delivery chamber Figure 10 CC section view.

[0038] Figure 17 This is a schematic diagram of the first embodiment of the marking ring position.

[0039] Figure 18 This is a schematic diagram of the second embodiment of the marking ring position.

[0040] Figure 19 This is a schematic diagram of the third embodiment of the marking ring position.

[0041] 1. First tube body; 11. Filling port; 12. Filling cavity;

[0042] 2. Second tube body; 21. Inlet; 22. Outlet; 23. Conveying chamber;

[0043] 3. Balloon;

[0044] 4. Third tube body; 41. Guide wire outlet; 42. Guide wire inlet; 43. Guide wire cavity;

[0045] 5. Support wire;

[0046] 6. Guide tube seat; 61. First seat port; 62. Second seat port; 63. Third seat port;

[0047] 7. Stress-relieving tube;

[0048] 8. Marking ring;

[0049] 9. Aneurysm;

[0050] 10. Guide wire. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0052] See Figure 4-19 A balloon catheter comprising:

[0053] First tube body 1;

[0054] second tube body 2;

[0055] Balloon 3;

[0056] The third tube 4 is used to pass through the guide wire 10;

[0057] One end of the first tube 1 is connected to the balloon 3. The other end of the first tube 1 away from the balloon 3 has an inflation port 11 for inflating the balloon 3. The second tube 2 is disposed inside the first tube 1. One end of the second tube 2 extends out of the first tube 1 and has an output port 22 for delivering materials or drugs at the middle position on the side of the balloon 3. The other end of the second tube 2 away from the output port 22 extends out of the first tube 1 and has an input port 21 for delivering materials or drugs. The third tube 4 is connected to the end of the balloon 3 away from the first tube 1. The balloon catheter can be moved with the guidewire 10 through the third tube 4 to be guided to the target site of the designated blood vessel.

[0058] In this embodiment, the balloon catheter can be specifically used for chemical ablation therapy. Chemical ablation drugs are introduced through the inlet 21 and discharged through the outlet 22 to ablate the target blood vessel and its opening. The chemical ablation drugs can be anhydrous ethanol or other drugs. In addition, the balloon catheter can also be used for other treatments and applications, and can also introduce and discharge other types of materials (such as embolization coils) or drugs (such as contrast agents, embolization agents, etc.).

[0059] In this embodiment, the second tube 2 is sleeved inside the first tube 1, and a filling cavity 12 for filling is formed in the gap between the first tube 1 and the second tube 2. The two ends of the filling cavity 12 are respectively connected to the filling port 11 and the balloon 3. A delivery cavity 23 for inputting materials or drugs is provided inside the second tube 2. The two ends of the delivery cavity 23 are respectively connected to the input port 21 and the output port 22.

[0060] In this embodiment, a guidewire cavity 43 is formed inside the third tube 4. One end of the guidewire cavity 43 penetrates the side of the third tube 4 to form a guidewire outlet 41, and the other end of the guidewire cavity 43 penetrates the end of the third tube 4 away from the balloon 3 to form a guidewire inlet 42.

[0061] In this embodiment, the balloon catheter further includes a support wire 5, which is located within the filling cavity 12, the delivery cavity 23, or the wall of the second tube body 2. It should be emphasized that when the support wire 5 is located within the filling cavity 12 or the delivery cavity 23, the support wire 5 is fixed at the output port 22 to support the output port 22. This fixing method includes bonding, welding, or other fixing methods.

[0062] In this embodiment, the balloon catheter also includes a catheter seat 6, which includes a first seat port 61, a second seat port 62 and a third seat port 63. The first tube body 1 and the second tube body 2 both extend into the catheter seat 6 from the first seat port 61, and the filling port 11 is located at the second seat port 62 and the inlet port 21 is located at the third seat port 63.

[0063] In this embodiment, the two ends of the support wire 5 correspond to the guide seat 6 and the third tube body 4, respectively.

[0064] There are two ways in which the two ends of the support wire 5 correspond to the catheter hub 6 and the third tube body 4, respectively: 1. The two ends of the support wire 5 can be close to the catheter hub 6 and the third tube body 4, respectively, to provide support; 2. The two ends of the support wire 5 can be fixed to the catheter hub 6 and the third tube body 4, respectively, to provide support. Specifically, for the second method, one end of the support wire 5 is fixed to the catheter hub 6, and the other end of the support wire 5 passes through the balloon 3 and is fixed to the third tube body 4 to achieve its support function.

[0065] In this embodiment, the balloon catheter also includes a stress relief tube 7, which is disposed at the first seat 61 and sleeved on the outside of the first tube body 1.

[0066] In this embodiment, a marker is provided at the balloon 3; specifically, the marker is preferably a marker ring 8, which is fixed on the support wire 5 by bonding, forging, welding or other fixing methods.

[0067] It's worth noting that the number of marking rings (8) can be one, two, or three, and can be set as needed. See also: Figure 17 Two marking rings 8 are used, one at each end of the balloon 3; see also Figure 18 The marking ring 8 can be three, with two positioned at both ends of the balloon 3 and the other positioned in the middle of the balloon 3 to correspond to the output port 22, or directly positioned at the output port 22; see [link to relevant documentation]. Figure 19 The marking ring 8 can be a single ring, located in the middle of the balloon 3 to correspond to the output port 22, or it can be directly set at the output port 22.

[0068] Working principle and usage:

[0069] First, guided by the third tube body 4, the balloon catheter is delivered along the guidewire 10 to the opening of the blood vessel where chemical ablation is required.

[0070] Next, the balloon catheter inflates the balloon 3 through the inflation port 11 to seal the vascular opening. Then, contrast agent is injected into the inlet port 21, and the contrast agent is discharged from the outlet port 22 through the delivery chamber 23 to confirm whether the outlet port 22 is completely sealed. If the seal is incomplete and contrast agent reflux occurs, the balloon is inflated again until complete closure is achieved.

[0071] Subsequently, the chemical ablation drug is introduced through the inlet 21 and discharged through the delivery chamber 23 from the outlet 22, thereby performing chemical ablation treatment.

[0072] Finally, after the chemical ablation treatment was completed, the pressure balloon 3 was depressurized, the device was withdrawn, and the operation was completed.

[0073] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A balloon catheter, characterized in that, The balloon catheter includes: balloon; A first tube, one end of which is connected to the balloon, and the other end of the first tube away from the balloon has an inflation port for inflating the balloon. The second tube body is disposed within the first tube body; One end of the second tube extends out of the first tube and forms an outlet for outputting materials or drugs on the side of the balloon; the other end of the second tube, away from the outlet, extends out of the first tube and forms an inlet for inputting materials or drugs. A third tube is used to pass through the guidewire, the third tube being connected to the end of the balloon away from the first tube.

2. The balloon catheter according to claim 1, characterized in that, The gap between the first tube and the second tube forms a filling cavity for filling, and the two ends of the filling cavity are respectively connected to the filling port and the balloon; the second tube is provided with a delivery cavity for inputting materials or drugs, and the two ends of the delivery cavity are respectively connected to the input port and the output port.

3. A balloon catheter according to claim 1, characterized in that, A guidewire cavity is formed within the third tube. One end of the guidewire cavity passes through the side of the third tube to form a guidewire outlet, and the other end of the guidewire cavity passes through the end of the third tube away from the balloon to form a guidewire inlet.

4. A balloon catheter according to claim 2, characterized in that, The balloon catheter also includes a support wire located within the filling cavity, the delivery cavity, or the wall of the second tube.

5. A balloon catheter according to claim 4, characterized in that, The balloon catheter also includes a catheter hub, which includes a first port, a second port and a third port. The first tube body and the second tube body both extend into the catheter hub from the first port, and the filling port is located at the second port, while the inlet port is located at the third port.

6. A balloon catheter according to claim 5, characterized in that, The two ends of the support wire correspond to the guide seat and the third tube body, respectively.

7. A balloon catheter according to claim 6, characterized in that, The two ends of the support wire are respectively close to the catheter seat and the third tube body; or, the two ends of the support wire are respectively fixed to the catheter seat and the third tube body.

8. A balloon catheter according to claim 5, characterized in that, The balloon catheter also includes a stress-relieving tube, which is disposed at the first port and sleeved outside the first tube body.

9. A balloon catheter according to any one of claims 1-8, characterized in that, A marker is provided at the balloon.

10. A balloon catheter according to claim 9, characterized in that, The number of markers is one, and it is located at the output port; Alternatively, there may be two markers, located at both ends of the balloon; Alternatively, the number of markers may be three or more, located at the output port and both ends of the balloon, respectively.

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