Multi-connected dilating catheter

Abstract

The utility model discloses a multi-connection dilating catheter which comprises an outer tube with a closed tip, a guide wire tube and a balloon tube, wherein the guide wire tube and the balloon tube are arranged in the outer tube; the sacculus tube is formed by communicating a sacculus, a pressurizing tube and a pressurizing extension tube; the sacculus is arranged close to the tip end of the outer tube; the whole guide wire tube is in a tube shape with one closed end, and the other end of the guide wire tube is in a funnel shape and used for intervention of a guide wire. The number of the balloon tubes is greater than or equal to 2; the balloon tubes and the guide wire tubes are evenly arranged in the circumferential direction of the axis of the outer tube, the positions of balloons of the different balloon tubes are different, and the balloon tubes are sequentially arranged from the tip end of the outer tube along the axis of the outer tube. And the outer tube is made of a flexible material, so that the outer tube is expanded along with the expansion of the balloon.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a multi-connected dilation catheter. Background Art

[0002] Chronic thromboembolic pulmonary hypertension (CTEPH) is a disease characterized by symptomatic or asymptomatic pulmonary embolism (PE), which leads to fibrous remodeling of the pulmonary artery intima, resulting in mechanical pulmonary artery stenosis or occlusion, and inducing varying degrees of remodeling of small pulmonary arteries in non-obstructed areas. These factors, combined, lead to elevated pulmonary artery pressure (PAP) and pulmonary vascular resistance (PVR), leading to progressive right heart failure and resulting in disability and mortality. For most patients, the only available treatment options are balloon pulmonary angioplasty (BPA) and drug therapy. However, drug therapy has variable efficacy and is expensive (currently, the only drug indicated for CTEPH, Levofloxacin, is very expensive). Therefore, BPA has become an important and effective treatment for this group of patients.

[0003] In the existing technology, balloon catheters used for pulmonary hypertension are mostly designed with a single balloon. When dealing with pulmonary blood vessels of different diameters, doctors need to perform repeated operations multiple times and frequently replace catheters of different specifications. This not only increases the complexity of the surgical operation, but also prolongs the operation time. At the same time, it exposes doctors to more X-ray radiation, bringing considerable risks to both patients and doctors.

[0004] In addition, although the conical balloon dilatation catheter can adapt to blood vessels of different diameters to a certain extent, due to its shape characteristics, it may cause uneven expansion of blood vessels and even increase the risk of blood vessel rupture, posing a hidden danger to surgical safety.

[0005] To this end, we propose a multi-link dilation catheter to solve the above problems. Utility Model Content

[0006] In response to the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a multi-expansion catheter, which aims to solve the problem that the balloon catheters used for pulmonary hypertension in the prior art are mostly designed with a single balloon. When facing pulmonary blood vessels of different diameters, doctors need to perform repeated operations multiple times and frequently replace catheters of different specifications. This not only increases the complexity of the surgical operation, but also prolongs the operation time. At the same time, it exposes doctors to more X-ray radiation, bringing considerable risks to both patients and doctors.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A multi-link dilatation catheter comprises an outer tube 1 with a closed tip, a guidewire tube 2 and a balloon tube 3 arranged inside the outer tube 1; the balloon tube 3 is composed of a balloon 7, a pressurizing tube 8, and a pressurizing extension tube, and the balloon 7 is arranged near the tip of the outer tube 1; the guidewire tube 2 is generally tubular with one end closed, and the other end of the guidewire tube 2 is funnel-shaped for use as an interventional guidewire; the number of the balloon tubes is ≥2; the balloon tubes 3 and guidewire tubes 2 are uniformly arranged circumferentially along the axis of the outer tube 1, and the balloons of different balloon tubes 3 have different positions and are arranged sequentially along the axis of the outer tube 1 from the tip of the outer tube 1; the outer tube 1 is made of flexible material so that the outer tube 1 expands as the balloon 7 expands.

[0009] The pressurized tube 8 is located inside the outer tube 1, and the pressurized tube extension tube is located outside the outer tube 1. It can be integrally formed with the reinforcement tube 8, or can be formed separately and then sleeved or bonded together to form a pipeline.

[0010] This solution utilizes a multi-size, serially connected balloon design, combining several balloons of varying sizes to form a single, integrated pulmonary artery balloon dilation catheter. By adjusting the inflation volume of each balloon, precise dilation of vessels of varying diameters can be achieved.

[0011] Preferably, the balloon 7 is in the shape of a closed sac, and its radial section is annular. The balloon 7 is wrapped around the outer wall of the outer tube 1, and the balloon 7 is fixedly connected to the outer wall of the outer tube 1; the balloon 7 is provided with an inflation hole, and one end of the pressurizing tube 8 passes through the outer wall of the outer tube 1 and is connected to the inflation hole to inflate and deflate the balloon.

[0012] Preferably, the multi-way connector is provided with an air inlet end and several air outlet ends, and the air inlet end and the several air outlet ends are connected to each other; the number of the air outlet ends matches the number of the balloon tubes; one end of the pressurized extension tube is connected to the corresponding pressurized tube, and the other end is connected to any of the air outlet ends; a pressure control device is provided on the pressurized extension tube, and the pressure control device includes a control valve 9 and a Luer connector 10, and the control valve 9 and the Luer connector 10 are sequentially connected in series on the pressurized extension tube.

[0013] The flexible adjustment mechanism for balloon inflation volume allows one pressure pump to control balloons of different specifications, making operation easier and enabling doctors to precisely control the expansion degree of each balloon as needed, thereby achieving precise expansion of blood vessels of different diameters.

[0014] Preferably, the guide wire tube is made of a flexible medical polymer material.

[0015] This material has good biocompatibility and corrosion resistance, ensuring the safety and stability of the catheter during surgery.

[0016] Preferably, it also includes a hypotube 4, a catheter reinforcement and a handle, one end of the hypotube 4 is communicated with the guide wire tube, the other end of the hypotube 4 is fixedly connected to the catheter reinforcement, the two ends of the catheter reinforcement are respectively fixedly connected to the hypotube 4 and the handle, and the middle section of the hypotube 4 is evenly provided with two marking rings made of platinum-iridium alloy, and the distances between the two marking rings and the tip are 90 cm and 100 cm respectively.

[0017] The preferred material of the balloon is polyamide or polyether-block amide, and the inner diameter and length of the balloon are 2.0*10 (mm), 3.0*10 (mm), and 4.0*10 (mm), respectively. The number of balloons can be 2 or 3, any combination of the above specifications.

[0018] Preferably, the outer tube 1, balloon, pressurizing tube and guide wire tube 2 are integrally formed. Such integral forming makes the pressurizing tube and guide wire tube 2 become tubular cavities inside the outer tube 1, which has low design and processing difficulty, and the positions of the cavities are fixed and accurately positioned.

[0019] Compared with the existing technology, the utility model has the following beneficial effects:

[0020] 1. Addressing the existing need for frequent catheter replacement to accommodate vessels of varying diameters, the present invention's multi-size tandem design allows surgeons to precisely dilate vessels of varying diameters by adjusting the inflation volume of balloons of varying sizes without having to change catheters during surgery. This not only reduces surgical time and complexity, but also significantly improves surgical efficiency.

[0021] 2. This innovative design reduces surgical risk. By reducing the number of catheter exchanges, the time doctors and patients are exposed to X-ray radiation is effectively shortened, thereby reducing health risks to both doctors and patients. Furthermore, it avoids the risk of uneven vascular expansion and rupture that can occur with a tapered balloon, further ensuring surgical safety for patients.

[0022] 3. The technical benefits of this invention are also reflected in its enhanced surgical flexibility and adaptability. Due to the diverse balloon specifications, this catheter can adapt to pulmonary vessels of varying diameters. Simultaneously, single-pressure pump control simplifies and facilitates operation, providing the surgeon with greater operational flexibility and precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described in detail below with reference to specific embodiments.

[0024] Figure 1 This is the overall picture of the double expansion tube;

[0025] Figure 2 This is a cross-sectional view of the double expansion pipe pipeline;

[0026] Figure 3 This is a cross-sectional view of the front end of the front double expansion tube;

[0027] Figure 4 This is the overall picture of the triple expansion tube;

[0028] Figure 5 This is a cross-sectional view of the triple expansion tube pipeline;

[0029] Figure 6 This is a cross-sectional view of the front end of the three-end double expansion tube.

[0030] 1 - outer tube; 2 - guidewire tube; 3 - balloon tube; 4 - hypotube; 5 - catheter reinforcement; 6 - handle; 7 - balloon; 71 - development point; 8 - pressurized tube; 9 - control valve; 10 - Luer connector. DETAILED DESCRIPTION

[0031] Example 1:

[0032] like Figure 1-3 The multi-unit dilatation catheter shown includes an outer tube with a closed tip, a guidewire tube disposed within the outer tube, and a balloon tube. The balloon tube is composed of a balloon, a pressurizing tube, and a pressurizing extension tube, with the balloon disposed near the tip of the outer tube. The guidewire tube is tubular with one end closed and the other end funnel-shaped for use as an interventional guidewire. There are two balloon tubes, each uniformly arranged along the axis of the outer tube. The balloons of the two balloon tubes are positioned differently and arranged sequentially along the axis of the outer tube from the tip. The outer tube is made of a flexible material, allowing it to expand as the balloon expands. The guidewire tube is made of a compliant medical polymer material with excellent biocompatibility and corrosion resistance, ensuring the safety and stability of the catheter during surgery.

[0033] The balloon is designed as a sealed sac, with a circular radial cross-section. It wraps around the outer wall of the outer tube and is fixedly connected to it. The balloon has an inflation hole, and one end of the pressurized tube passes through the outer wall of the outer tube and connects to the inflation hole for inflation and deflation. The inner diameter and length of the balloon are 2.0*10 (mm) and 3.0*10 (mm), respectively.

[0034] The three-way connector is provided with an air inlet end and two air outlet ends, and the air inlet end and the two air outlet ends are connected to each other; one end of the pressurized extension tube is connected to the corresponding pressurized tube, and the other end is connected to any air outlet end; a pressure control device is provided on the pressurized extension tube, and the pressure control device includes a control valve and a Luer connector, and the control valve and the Luer connector are connected in series on the pressurized extension tube in sequence.

[0035] The device also includes a hypotube, a catheter reinforcement, and a handle. The outer tube, hypotube, and catheter reinforcement are integrally formed. One end of the hypotube is connected to the guidewire tube, and the other end is fixedly connected to the catheter reinforcement. The ends of the catheter reinforcement are respectively fixedly connected to the hypotube and the handle. Two platinum-iridium alloy marker rings are evenly arranged in the middle section of the hypotube, and the two marker rings are respectively 90 cm and 100 cm away from the tip.

[0036] Example 2:

[0037] like Figure 4-6 The multi-unit dilatation catheter shown includes an outer tube with a closed tip, a guidewire tube disposed within the outer tube, and a balloon tube. The balloon tube is composed of a balloon, a pressurizing tube, and a pressurizing extension tube, with the balloon disposed near the tip of the outer tube. The guidewire tube is tubular with one end closed and the other end funnel-shaped for use as an interventional guidewire. There are two balloon tubes, each uniformly arranged along the axis of the outer tube. The balloons of the two balloon tubes are positioned differently and arranged sequentially along the axis of the outer tube from the tip. The outer tube is made of a flexible material, allowing it to expand as the balloon expands. The guidewire tube is made of a compliant medical polymer material with excellent biocompatibility and corrosion resistance, ensuring the safety and stability of the catheter during surgery.

[0038] The balloon is designed as a sealed sac, with a circular radial cross-section. It wraps around the outer wall of the outer tube and is fixedly connected to it. The balloon has an inflation hole, and one end of the pressurized tube passes through the outer wall of the outer tube and connects to the inflation hole for inflation and deflation. The inner diameter and length of the balloon are 2.0*10 (mm), 3.0*10 (mm), and 4.0*10 (mm), respectively.

[0039] The multi-way connector is provided with an air inlet end and three air outlet ends, and the air inlet end and the three air outlet ends are connected to each other; one end of the pressurized extension tube is connected to the corresponding pressurized tube, and the other end is connected to any air outlet end; a pressure control device is provided on the pressurized extension tube, and the pressure control device includes a control valve and a Luer connector, and the control valve and the Luer connector are connected in series on the pressurized extension tube in sequence.

[0040] The device also includes a hypotube, a catheter reinforcement, and a handle. The outer tube, hypotube, and catheter reinforcement are integrally formed. One end of the hypotube is connected to the guidewire tube, and the other end is fixedly connected to the catheter reinforcement. The ends of the catheter reinforcement are respectively fixedly connected to the hypotube and the handle. Two platinum-iridium alloy marker rings are evenly arranged in the middle section of the hypotube, and the two marker rings are respectively 90 cm and 100 cm away from the tip.

[0041] The above embodiments of the present invention are merely examples for illustrating the present invention and are not intended to limit the manner in which the present invention may be implemented. A person skilled in the art will readily appreciate that other variations and modifications based on the above description are possible. An exhaustive list of all possible embodiments is not possible here. Any obvious variations or modifications arising from the technical solution of the present invention remain within the scope of protection of the present invention.

Claims

1. A multi-link dilatation catheter comprising an outer tube (1) with a closed tip, a guide wire tube (2) and a balloon tube (3) arranged inside the outer tube (1); characterized in that: The balloon tube (3) is composed of a balloon (7), a pressurizing tube (8), and a pressurizing extension tube, and the balloon (7) is arranged near the tip of the outer tube (1); the guide wire tube (2) is in the shape of a tube with one end closed, and the other end of the guide wire tube (2) is funnel-shaped and is used for interventional guide wire; the number of the balloon tubes is ≥2; the balloon tube (3) and the guide wire tube (2) are evenly arranged along the circumference of the axis of the outer tube (1), and the positions of the balloons of different balloon tubes (3) are different, and are arranged in sequence from the tip of the outer tube (1) along the axis of the outer tube (1); the outer tube (1) is made of flexible material so that the outer tube (1) expands as the balloon (7) expands.

2. The multi-link dilatation catheter according to claim 1, characterized in that: The balloon (7) is in the shape of a closed sac, and its radial section is annular. The balloon (7) is wrapped around the outer wall of the outer tube (1), and the balloon (7) is fixedly connected to the outer wall of the outer tube (1); the balloon (7) is provided with an inflation hole, and one end of the pressurizing tube (8) passes through the outer wall of the outer tube (1) and is connected to the inflation hole for inflating and deflation of the balloon.

3. The multi-link dilatation catheter according to claim 1, characterized in that: It also includes a multi-way connector, which is provided with an air inlet end and a plurality of air outlet ends, and the air inlet end and the plurality of air outlet ends are connected to each other; the number of the air outlet ends matches the number of the balloon tubes; one end of the pressurized extension tube is connected to the corresponding pressurized tube, and the other end is connected to any of the air outlet ends; a pressure control device is provided on the pressurized extension tube, and the pressure control device includes a control valve (9) and a Luer connector (10), and the control valve (9) and the Luer connector (10) are sequentially connected in series on the pressurized extension tube.

4. The multi-link dilatation catheter according to claim 1, characterized in that: The guide wire tube (2) is made of a flexible medical polymer material.

5. The multi-link dilatation catheter according to claim 1, characterized in that: The invention also includes a hypotube (4), a catheter reinforcement and a handle, one end of the hypotube (4) is connected to the guide wire tube, the other end of the hypotube (4) is fixedly connected to the catheter reinforcement, the two ends of the catheter reinforcement are respectively fixedly connected to the hypotube (4) and the handle, and the middle section of the hypotube (4) is evenly provided with two marking rings made of platinum-iridium alloy, and the distances between the two marking rings and the tip are 90 cm and 100 cm respectively.

6. The multi-link dilatation catheter according to claim 1, characterized in that: The material of the balloon (7) is polyamide or polyether segment polyether block amide, the inner diameter of the balloon is 2.0 mm, 3.0 mm or 4.0 mm; and the length of the balloon is 10 mm.

7. The multi-link dilatation catheter according to claim 1, characterized in that: The outer tube (1), the balloon, the pressurizing tube, and the guide wire tube (2) are integrally formed.

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