Double-cavity opening catheter

Abstract

The double-cavity opening catheter comprises a catheter body and a Y-shaped connector, the catheter body comprises an inner cavity tube and an outer cavity tube, the inner cavity tube is sleeved with the outer cavity tube, an annular cavity channel is formed between the outer wall of the inner cavity tube and the inner wall of the outer cavity tube, and a plurality of side holes are formed in the far end of the outer cavity tube; in conclusion, by integrating the functions of radiography, perfusion, opening and the like, the angiographic catheter has the functions of a conventional angiographic catheter on the market at present, a more efficient and safer solution is provided for interventional operations, and the angiographic catheter is expected to bring important changes in the field of vascular interventional therapy.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a double-lumen opening catheter. Background Art

[0002] Angiography catheters are key devices for percutaneous angiography. They have appropriate hardness, elasticity, softness and torque, and should also have good X-ray transparency. Their main function is to provide a guide so that contrast agents can be smoothly introduced into blood vessels to produce angiography effects; perfusion catheters are a medical device used to inject drugs or other liquids into the human body during surgery or treatment. They are widely used in various medical fields, such as surgery, tumor treatment, anesthesia and first aid; opening catheters are medical devices used in interventional surgery to restore or improve the patency of narrowed or blocked blood vessels and ducts (such as bile ducts and urinary ducts); the angiography catheters, perfusion catheters, and opening catheters currently used in clinical practice are all single-lumen structures with a single function. During a complex operation, it is necessary to switch back and forth multiple times between catheters with different functions for surgical treatment, which is cumbersome to operate. Summary of the Invention

[0003] The present invention aims to provide a dual-lumen opening catheter that adopts a coaxial dual-lumen structure and integrates multiple functions such as angiography, opening, and drug injection. It avoids the frequent replacement of catheters in traditional surgery, greatly shortens the operation time, and reduces the physiological burden and risks that may increase on patients due to prolonged surgery. At the same time, reducing catheter exchanges also reduces the risk of infection and the possibility of vascular damage, thereby improving the overall safety of the operation.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: The double-lumen opening catheter includes a catheter body and a Y-shaped connector. The catheter body includes an inner lumen tube and an outer lumen tube. The outer lumen tube is sleeved outside the inner lumen tube to form an annular lumen between the outer wall of the inner lumen tube and the inner wall of the outer lumen tube. The distal end of the outer lumen tube is provided with a plurality of side holes. The Y-shaped connector is connected to the proximal end of the catheter body. The Y-shaped connector is provided with a first connecting port and a second connecting port. The first connecting port is connected to the proximal end of the inner cavity tube, and the second connecting port is connected to the proximal side wall of the outer cavity tube, and the second connecting port is communicated with the annular cavity.

[0005] Furthermore, the first connection port and the second connection port are both Luer interfaces.

[0006] Furthermore, the inner cavity tube is made of polymer material.

[0007] Furthermore, the outer cavity tube is composed of a metal catheter and a polymer material catheter, the metal catheter is formed by winding a metal belt, and the polymer material catheter is adhered to the outer wall of the metal catheter.

[0008] Compared with the prior art, the present invention has the following beneficial effects: (1) Improve the ability of the catheter to penetrate blood clots: The catheter has sufficient hardness, which effectively improves the support of the catheter during the operation. At the same time, the catheter has a certain degree of flexibility, which enables the product to better adapt to various curved blood vessels; (2) The dual-lumen structure improves surgical efficiency and safety: it reduces the number of catheter exchanges during surgery, effectively shortens the operation time, and reduces the exposure time of medical workers to X-rays; (3) For patients, the cost of surgery: The inner cavity of this product can be used for high-pressure angiography injection and has the function of angiography catheter, and the outer cavity can be used for micro-injection of thrombolytic drugs and has the function of thrombolytic catheter. The catheter has sufficient support to effectively solve the problem of stubborn thrombus and establish a life channel.

[0009] (4) Innovation in materials and structure: The inner lumen is made of polymer material, which has sufficient elasticity. The lumen of the catheter can be expanded during high-pressure injection of contrast agents. When injecting drugs in the annular lumen, the inner lumen can be squeezed to a certain extent to expand the injection space of the outer lumen. The outer lumen is made of a combination of metal and plastic materials, and is wrapped with stainless steel tape to enhance its strength and flexibility. This not only ensures the support of the catheter, but also facilitates flexible operation in complex vascular pathways, reducing damage to the vascular wall. (5) During the initial examination phase, contrast agents can be injected through a catheter. If severe blood vessel blockage is found, a catheter can be used; In summary, the present invention integrates the functions of opening, angiography, and perfusion into one, while also possessing the functions of conventional angiography catheters currently on the market, providing a more efficient and safe solution for interventional surgery, and is expected to bring about important changes in the field of vascular interventional treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic structural diagram of the double-lumen opening catheter of the present invention; Figure 2 Schematic diagram of the structure of the catheter body; Figure 3 is a cross-sectional view of the catheter body; Figure 4 It is a structural diagram of the Y-type connector; Figure 5 for Figure 1 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0012] The present invention is described in further detail below with reference to the examples.

[0013] A specific embodiment of a double-lumen opening catheter provided by the present invention: like Figure 1-5 As shown, a double-lumen opening catheter includes a catheter body 1 and a Y-shaped connector 2. The catheter body 1 includes an inner lumen tube 3 and an outer lumen tube 4. The inner lumen tube 3 is made of a polymer material to ensure safety during injection of contrast agent. The polymer material is polyurethane, polycarbonate or polyether block amide. The outer lumen tube 4 is composed of a metal tube and a polymer material tube. The metal tube is wound with a stainless steel belt. The polymer material tube is adhered to the outer wall of the metal tube through a high-temperature heat shrinkage process to ensure sufficient support force. The stainless steel belt is used to wrap it to enhance its strength and flexibility, which not only ensures the support of the catheter, but also facilitates flexible operation in complex vascular pathways and reduces damage to the vascular wall.

[0014] like Figure 4 As shown, a stress diffusion tube 7 is provided between the end of the Y-type connector 2 and the outer wall of the outer cavity tube 4. The stress diffusion tube 7 is made of a polymer elastic material and can effectively prevent the catheter from being broken at the connector connection position when the tube body is bent.

[0015] The Y-shaped connector 2 is connected to the proximal end of the catheter body 1. The Y-shaped connector 2 is provided with a first connection port 5 and a second connection port 6. The first connection port 5 and the second connection port 6 are both Luer interfaces, which can be used in conjunction with other equipment with standard interfaces. The first connection port 5 is connected to the proximal end of the inner cavity tube 3, and the second connection port 6 is connected to the proximal side wall of the outer cavity tube 4, and the second connection port 6 is connected to the annular cavity 8. A stress diffusion tube 7 is provided between the end of the Y-shaped connector 2 and the outer wall of the outer cavity tube 4. The stress diffusion tube 7 is also made of a polymer elastic material, which can effectively prevent the catheter from being broken at the connector connection position when the tube body is bent. The Y-shaped connector 2 is provided with a first connection port 5 and a second connection port 6. The first connection port 5 and the second connection port 6 are both standard Luer interfaces, which can be used in conjunction with other equipment with standard interfaces. The first connection port 5 is connected to the proximal end of the inner cavity tube 3.

[0016] It should be noted that, in this document, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0017] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. Double-lumen opening catheter, characterized in that: The catheter body comprises a catheter body and a Y-shaped connector. The catheter body comprises an inner cavity tube and an outer cavity tube. The outer cavity tube is sleeved outside the inner cavity tube. An annular cavity is formed between the outer wall of the inner cavity tube and the inner wall of the outer cavity tube. The distal end of the outer cavity tube is provided with a plurality of side holes. The Y-shaped connector is connected to the proximal end of the catheter body. The Y-shaped connector is provided with a first connection port and a second connection port. The first connection port is connected to the proximal end of the inner cavity tube, and the second connection port is connected to the proximal side wall of the outer cavity tube, and the second connection port is communicated with the annular cavity.

2. The double-lumen opening catheter according to claim 1, characterized in that: The first connection port and the second connection port are both Luer interfaces.

3. The double-lumen opening catheter according to claim 2, characterized in that: The inner lumen tube is made of polymer material.

4. The double-lumen opening catheter according to claim 3, characterized in that: The outer cavity tube is composed of a metal catheter and a polymer material catheter. The metal catheter is formed by winding a metal belt, and the polymer material catheter is adhered to the outer wall of the metal catheter.

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