Positioning catheter with positioning function for pulmonary vessel intervention guide wire

Abstract

The utility model provides a positioning catheter with a positioning function for a pulmonary vessel intervention guide wire, which comprises a guide wire and a guide wire catheter, the outer side of the guide wire is provided with the positioning catheter positioned on the inner side of the guide wire catheter, and the diameter of the positioning catheter is smaller than that of the guide wire catheter. An inflatable fixing mechanism used for fixing the guide wire is installed on the inner wall of the positioning catheter. By arranging the inflatable fixing mechanism and the positioning sensor, the inflatable fixing mechanism can clamp and fix a guide wire penetrating through the positioning catheter during use, so that when the guide wire penetrates into a blood vessel, the guide wire only needs to carry the positioning catheter to enter the blood vessel; the positioning function can be achieved through the positioning sensor in the positioning catheter, the guide wire catheter does not need to penetrate into a blood vessel together, and the guide wire penetrating difficulty can be lowered while the guide wire is positioned through the positioning sensor.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a positioning catheter with a positioning guide wire for pulmonary vascular intervention. Background Technology

[0002] The pulmonary vascular interventional guidewire is a key instrument in pulmonary vascular interventional surgery. It serves as the vanguard for interventional instruments such as catheters to enter the pulmonary vessels. In pulmonary vascular interventional surgery, the guidewire is first inserted into the blood vessel. The surgeon manipulates the guidewire to explore within the blood vessel, find the appropriate path to reach the target lesion site, and then other instruments such as catheters can be inserted along the guidewire, ensuring accurate placement at the location requiring treatment.

[0003] A search revealed Chinese Patent Utility Model No. 202011276264.1, which discloses a positioning catheter for a pulmonary vascular interventional guiding guidewire with positioning capabilities. The catheter body includes a dual-lumen catheter body, comprising a positioning catheter with flush front and rear ends for placing a positioning sensor, and a guidewire catheter for the guidewire to pass through. The positioning catheter has a sealed front end and an open rear end, while the guidewire catheter has open front and rear ends. The front end of the guidewire extends out of the guidewire catheter and bends backward to form a U-shaped bend. The other end of the guidewire catheter has graduation lines and a guidewire handle. The positioning sensor is a displacement sensor. The positioning sensor is connected to a power supply unit via a sensor plug. The catheter body is fixed to the lesion site by a positioning clamp. This invention features a simple structure, reasonable design, flexible use, and strong practicality. The guiding guidewire can perform both conventional guidewire functions and, under magnetic navigation guidance, can be smoothly guided through complex and tortuous pulmonary vessels. However, the aforementioned patents have the following shortcomings: 1. When inserting the guidewire, both the guidewire catheter and the positioning catheter need to be inserted into the blood vessel together in order to achieve the guidewire positioning function through the positioning sensor inside the positioning catheter, which increases the difficulty of guidewire insertion during use; 2. At the same time, the double-lumen structure increases the outer diameter of the catheter, resulting in reduced permeability. Therefore, this utility model proposes a new solution. Utility Model Content

[0004] The purpose of this invention is to solve the problems of the above-mentioned applications, which require the guidewire catheter and positioning catheter to be inserted into the blood vessel together during guidewire insertion in order to achieve the guidewire positioning function through the positioning sensor in the positioning catheter. This increases the difficulty of guidewire insertion during use, and the double-lumen structure increases the outer diameter of the catheter, resulting in reduced permeability. Therefore, this invention proposes a positioning catheter for pulmonary vascular interventional guidance guidewire with positioning.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A positioning catheter with a positioning guide wire for pulmonary vascular intervention is used to improve the above problems.

[0007] The present invention is as follows:

[0008] The device includes a guidewire and a guidewire conduit. A positioning conduit is located inside the guidewire conduit on the outer side of the guidewire. The diameter of the positioning conduit is smaller than that of the guidewire conduit. An inflatable fixing mechanism for fixing the guidewire is installed on the inner wall of the positioning conduit. The guidewire passes through the inflatable fixing mechanism. A positioning sensor located on one side of the inflatable fixing mechanism is installed inside the positioning conduit.

[0009] As a preferred technical solution of this utility model, the positioning sensor is configured as two, and is symmetrically arranged on both sides of the inflatable fixing mechanism. The positioning sensor is connected to a wire, and the end of the wire is equipped with a plug.

[0010] As a preferred technical solution of this utility model, the positioning conduit includes a tube body and a guide cylinder. The guide cylinder is a hollow conical structure and is fixedly connected to one end of the tube body.

[0011] As a preferred technical solution of this utility model, a first through hole is provided at one end of the tube body, and a second through hole is provided at the end of the guide cylinder. The guide wire passes through the tube body and the guide cylinder through the first through hole and the second through hole. An annular sealing ring is fixedly installed inside the first through hole.

[0012] As a preferred technical solution of this utility model, the inflatable fixing mechanism includes an airbag with an annular cross-section. The airbag is located outside the guide wire, and a connecting block for connecting to the inner wall of the positioning catheter is installed on the outer wall of the airbag.

[0013] As a preferred technical solution of this utility model, an air tube is fixedly connected to the airbag and communicates with its interior, and an inflation head is installed at the end of the air tube away from the airbag.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In the solution of this utility model:

[0016] 1. By setting up an inflatable fixation mechanism and a positioning sensor, the inflatable fixation mechanism can clamp and fix the guidewire passing through the inside of the positioning catheter during use. In this way, when the guidewire is inserted into the blood vessel, only the positioning catheter needs to be inserted into the blood vessel. The positioning sensor inside the positioning catheter can achieve the positioning function without inserting the guidewire and catheter into the blood vessel together. This reduces the difficulty of inserting the guidewire while achieving guidewire positioning through the positioning sensor.

[0017] 2. Compared to the parallel structure of the dual lumen, the coaxial arrangement of the guidewire, positioning catheter and guidewire-catheter is more compact and has a smaller total diameter, reducing the risk of physical stimulation and damage to blood vessels during insertion. At the same time, when positioning the guidewire through the positioning sensor, only the guidewire and positioning catheter need to be inserted into the blood vessel, which can effectively improve the overall passability in the blood vessel. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the positioning catheter with positioning guide wire for pulmonary vascular intervention provided by this utility model;

[0019] Figure 2 A schematic diagram of the internal structure of the positioning catheter with positioning guide wire for pulmonary vascular intervention provided by this utility model;

[0020] Figure 3 A schematic diagram of the balloon structure of the positioning catheter with positioning guide wire for pulmonary vascular intervention provided by this utility model.

[0021] Figure 4 A schematic diagram of the tube structure of the positioning catheter with positioning guide wire for pulmonary vascular intervention provided by this utility model;

[0022] Figure 5 The positioning catheter with positioning guide wire for pulmonary vascular intervention provided by this utility model Figure 2 Enlarged view of the structure at point A.

[0023] The image shows:

[0024] 1. Guide wire; 2. Positioning guide tube; 3. Guide wire guide tube; 4. Inflatable fixing mechanism; 5. Positioning sensor; 6. Wire; 7. Plug; 201. Tube body; 202. First through hole; 203. Sealing ring; 204. Guide tube; 205. Second through hole; 401. Airbag; 402. Connecting block; 403. Air tube; 404. Inflator head. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0026] like Figures 1-5As shown, this embodiment proposes a positioning catheter for a pulmonary vascular interventional guide wire with positioning capability, including a guide wire 1 and a guide wire catheter 3. A positioning catheter 2 is disposed outside the guide wire 1 and inside the guide wire catheter 3. The diameter of the positioning catheter 2 is smaller than the diameter of the guide wire catheter 3. An inflatable fixation mechanism 4 for fixing the guide wire 1 is installed on the inner wall of the positioning catheter 2. The guide wire 1 passes through the inflatable fixation mechanism 4. A positioning sensor 5 is installed inside the positioning catheter 2 and located on one side of the inflatable fixation mechanism 4. By setting the inflatable fixation mechanism 4 and the positioning sensor 5, the inflatable fixation mechanism 4 can clamp and fix the guide wire 1 passing through the inside of the positioning catheter 2 during use. When the guidewire is inserted into the blood vessel, only the positioning catheter 2 needs to be inserted into the blood vessel. The positioning sensor 5 inside the positioning catheter 2 can achieve the positioning function. There is no need to insert the guidewire 1 into the blood vessel together. The positioning sensor 5 can achieve positioning of the guidewire 1 while reducing the difficulty of inserting the guidewire 1. Compared with the dual-lumen parallel structure, the coaxial arrangement of the guidewire 1, positioning catheter 2 and guidewire 3 has a more compact overall structure and a smaller total diameter, which reduces the risk of physical stimulation and damage to the blood vessel during insertion. At the same time, when positioning the guidewire 1 through the positioning sensor 5, only the guidewire 1 and the positioning catheter 2 need to be inserted into the blood vessel, which can effectively improve the overall passability in the blood vessel.

[0027] like Figure 1 and Figure 2 As shown, in a preferred embodiment, based on the above method, two positioning sensors 5 are further provided, symmetrically arranged on both sides of the inflatable fixing mechanism 4. A wire 6 is connected to each positioning sensor 5, and a plug 7 is installed at the end of the wire 6. It should be noted that the positioning sensors 5 and the wire 6 facilitate connection to external power sources and guiding devices.

[0028] like Figure 1 , Figure 2 and Figure 4 As shown, in a preferred embodiment, based on the above method, the positioning catheter 2 further includes a tube body 201 and a guide tube 204. The guide tube 204 is a hollow conical structure and is fixedly connected to one end of the tube body 201. It should be noted that, by providing the guide tube 204, the positioning catheter 2 can be guided as it moves with the guide wire 1, reducing friction on the blood vessel wall when its end turns.

[0029] like Figure 1 , Figure 2 and Figure 4As shown, in a preferred embodiment, based on the above method, a first through hole 202 is further provided at one end of the tube body 201, and a second through hole 205 is provided at the end of the guide tube 204. The guide wire 1 passes through the tube body 201 and the guide tube 204 through the first through hole 202 and the second through hole 205. An annular sealing ring 203 is fixedly installed inside the first through hole 202. It should be noted that by setting the sealing ring 203, the gap between the first through hole 202 and the guide wire 1 can be sealed around the outside of the guide wire 1, thereby reducing the possibility of blood entering the tube body 201.

[0030] like Figures 1-3 As shown, in a preferred embodiment, based on the above method, the inflatable fixing mechanism 4 further includes an airbag 401 with an annular cross-section. The airbag 401 is located outside the guide wire 1. A connecting block 402 for connecting to the inner wall of the positioning conduit 2 is installed on the outer wall of the airbag 401. An air tube 403 communicating with the interior of the airbag 401 is fixedly connected to the airbag 401. An inflation head 404 is installed at the end of the air tube 403 away from the airbag 401. It should be noted that the connecting block 402 facilitates the fixing of the airbag 401. In use, the airbag 401 can be inflated by the inflation head 404 and the air tube 403 to clamp the guide wire 1 passing through its center. At the same time, the inflatable elastic clamping also avoids affecting the flexibility of the guide wire 1. The clamping of the guide wire 1 can be released by withdrawing the gas inside the airbag 401.

[0031] Specifically, the working principle of the positioning catheter of this pulmonary vascular interventional guide wire with positioning is as follows: When in use, the guide wire 1 is passed through the positioning catheter 2, so that its curved part extends out from the end of the positioning catheter 2. Then, the positioning sensor 5 is connected to the external power supply and navigation equipment through the wire 6 and the plug 7. The guide wire 1 is then clamped and fixed by the inflatable fixing mechanism 4 inside the positioning catheter 2. When the guide wire 1 is inserted, it is inserted into the blood vessel together with the positioning catheter 2. The positioning sensor 5 inside the positioning catheter 2 indirectly positions the end position of the guide wire 1. After reaching the designated position, the guide wire catheter 3 is inserted into the blood vessel along the positioning catheter 2.

[0032] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present utility model.

Claims

1. A positioning catheter for a pulmonary vascular interventional guiding guidewire with positioning capability, comprising a guidewire (1) and a guidewire catheter (3), characterized in that, A positioning conduit (2) is provided on the outside of the guidewire (1) and located inside the guidewire conduit (3). The diameter of the positioning conduit (2) is smaller than the diameter of the guidewire conduit (3). An inflatable fixing mechanism (4) for fixing the guidewire (1) is installed on the inner wall of the positioning conduit (2). The guidewire (1) passes through the inflatable fixing mechanism (4). A positioning sensor (5) located on one side of the inflatable fixing mechanism (4) is installed inside the positioning conduit (2).

2. The positioning catheter with a positioning guide wire for pulmonary vascular intervention as described in claim 1, characterized in that, Two positioning sensors (5) are provided and symmetrically arranged on both sides of the inflatable fixing mechanism (4). A wire (6) is connected to the positioning sensor (5), and a plug (7) is installed at the end of the wire (6).

3. The positioning catheter with a positioning guide wire for pulmonary vascular intervention according to claim 1, characterized in that, The positioning conduit (2) includes a tube body (201) and a guide tube (204). The guide tube (204) is a hollow conical structure and is fixedly connected to one end of the tube body (201).

4. The positioning catheter with a positioning guide wire for pulmonary vascular intervention as described in claim 3, characterized in that, One end of the tube body (201) is provided with a first through hole (202), and the end of the guide cylinder (204) is provided with a second through hole (205). The guide wire (1) passes through the tube body (201) and the guide cylinder (204) through the first through hole (202) and the second through hole (205). An annular sealing ring (203) is fixedly installed inside the first through hole (202).

5. A positioning catheter with a positioning guide wire for pulmonary vascular intervention according to claim 4, characterized in that, The inflatable fixing mechanism (4) includes an airbag (401) with an annular cross-section. The airbag (401) is located outside the guide wire (1). A connecting block (402) for connecting to the inner wall of the positioning catheter (2) is installed on the outer wall of the airbag (401).

6. A positioning catheter with a positioning guide wire for pulmonary vascular intervention according to claim 5, characterized in that, An air tube (403) is fixedly connected to the airbag (401) and communicates with its interior. An inflation head (404) is installed at the end of the air tube (403) away from the airbag (401).

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