Pulmonary artery multi-stage conveying catheter

Abstract

The utility model relates to the technical field of medical instruments, in particular to a pulmonary artery multistage conveying catheter. The pulmonary artery multistage conveying catheter comprises an outer sheath tube, a middle catheter and a working catheter, a first balloon is arranged on the outer wall of one end of the outer sheath tube, a first airflow cavity channel penetrating out of the side wall of the other end of the outer sheath tube is formed in the outer sheath tube, one end of the first airflow cavity channel is communicated with the first balloon, and the other end of the first airflow cavity channel is communicated with the working catheter. The middle catheter penetrates through one end of the outer sheath tube, a second balloon is arranged on the outer wall of one end of the middle catheter, a second airflow cavity channel penetrating out of the side wall of the other end of the middle catheter is formed in the middle catheter, one end of the second airflow cavity channel is communicated with the second balloon, and the working catheter penetrates through one end of the middle catheter. The utility model has the advantages of simple and reasonable structural design, can be specially used for the vast majority of operations of pulmonary vessels, greatly saves the operation time, and reduces the consumable cost of patients.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a pulmonary artery multi-stage delivery catheter. Background Art

[0002] Currently, there are no dedicated catheters for pulmonary blood vessels on the market. Clinically, for pulmonary vascular lesion detection or other related surgeries, dedicated catheters for peripheral blood vessels are used. Medical staff select catheters of appropriate sizes from these peripheral catheters based on the patient's condition and repeatedly attempt to insert them into the pulmonary blood vessels. This leads to increased consumables used during surgery and poor catheter matching. This increases surgical time and costs. In addition, traditional catheters do not have a vascular occlusion effect during use. Therefore, after contrast agents are injected into the blood vessels, the contrast agents are prone to reflux. The large amount of contrast agents used will inevitably increase the patient's excretion volume, which will affect the patient's renal function. At the same time, the reflux of contrast agents will interfere with the doctor's surgery and invisibly prolong the exposure time under X-ray. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a pulmonary artery multi-stage delivery catheter, which effectively overcomes the defects of the prior art.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] A pulmonary artery multi-stage delivery catheter comprises an outer sheath, an intermediate catheter and a working catheter, wherein a first balloon is provided on the outer wall of one end of the outer sheath, a first airflow lumen is provided in the outer sheath through the side wall of the other end thereof, one end of the first airflow lumen is communicated with the first balloon, the intermediate catheter passes through one end of the outer sheath, a second balloon is provided on the outer wall of one end of the intermediate catheter, a second airflow lumen is provided in the intermediate catheter through the side wall of the other end thereof, one end of the second airflow lumen is communicated with the second balloon, and the working catheter passes through one end of the intermediate catheter.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the other end of the outer sheath is provided with a first connector with a valve, and the other end of the intermediate conduit passes through the first connector.

[0008] Furthermore, the other end of the intermediate conduit is provided with a second connector with a valve, and the other end of the working conduit passes through the second connector.

[0009] Furthermore, one end of the working conduit is provided with an elastic elbow.

[0010] Furthermore, the diameter of the outer sheath tube is FF, and the diameter of the intermediate catheter tube is FF.

[0011] Furthermore, a first air path connector is provided at the other end of the first air flow cavity, and a second air path connector is provided at the other end of the second air flow cavity.

[0012] Furthermore, one end of the outer sheath tube, one end and the tube body of the intermediate catheter, and one end and the tube body of the working catheter are respectively provided with a developing ring.

[0013] The beneficial effects of the utility model are: simple and reasonable structural design, can be used exclusively for most surgical operations on pulmonary blood vessels, greatly saves surgical time, and reduces the patient's consumables costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of the pulmonary artery multi-stage delivery catheter of the present invention;

[0015] Figure 2 This is a structural schematic diagram of another embodiment of the pulmonary artery multi-stage delivery catheter of the present invention.

[0016] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0017] 1. Outer sheath; 2. Intermediate catheter; 3. Working catheter; 11. First balloon; 12. First airflow channel; 13. First connector; 21. Second balloon; 22. Second airflow channel; 23. Second connector; 31. Elbow. DETAILED DESCRIPTION

[0018] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0019] Example: Figure 1 As shown, the pulmonary artery multi-stage delivery catheter of this embodiment includes an outer sheath 1, an intermediate catheter 2 and a working catheter 3. The outer wall of one end of the outer sheath 1 is provided with a first balloon 11, and the outer sheath 1 is provided with a first airflow lumen 12 passing through the side wall of the other end thereof. One end of the first airflow lumen 12 is communicated with the first balloon 11, the intermediate catheter 2 passes through one end of the outer sheath 1, and the outer wall of one end of the intermediate catheter 2 is provided with a second balloon 21. The intermediate catheter 2 is provided with a second airflow lumen 22 passing through the side wall of the other end thereof, and one end of the second airflow lumen 22 is communicated with the second balloon 21, and the working catheter 3 passes through one end of the intermediate catheter 2.

[0020] The usage process is as follows:

[0021] After the puncture, the guide wire is sent into the pulmonary blood vessel, and the outer sheath tube 1 in the whole device is sent into the large blood vessel along the guide wire. After reaching the target position, the first balloon 11 is inflated through the first air flow channel 12, so that the first balloon 11 expands and squeezes against the inner wall of the large blood vessel, so that the outer sheath tube 1 is better positioned by the first balloon 11. Then, the intermediate catheter 2 is sent into the blood vessel branch along the guide wire. During the sending process, one end of the intermediate catheter 2 passes through one end of the outer sheath tube 1. After one end of the intermediate catheter 2 reaches the target position of the blood vessel branch, the second balloon 21 is inflated through the second air flow channel 22, so that the second balloon 21 expands and squeezes against the inner wall of the blood vessel branch, so that the intermediate catheter 2 is passed through the blood vessel branch. After achieving better positioning through the second balloon 21, the working catheter 3 is then advanced along the guidewire into the tertiary vascular branch until it reaches the lesion site. The working catheter 3 is connected to relevant instruments to perform relevant operations on the lesion site (such as drug administration, blood pressure testing, etc.). The entire process is performed under X-ray exposure. Contrast agent is injected into the blood vessel through the outer sheath 1, intermediate catheter 2, and working catheter 3. Because the first balloon 11 and the second balloon 21 respectively block the blood vessels, the injected contrast agent will not flow back. In other words, the effective use of contrast agent is increased, which directly reduces the amount of contrast agent used, reduces the patient's spontaneous excretion of contrast agent, and significantly reduces damage to renal function. It is particularly emphasized that during the operation, due to the inflation of the first balloon 11 and the second balloon 21, they squeeze and position themselves against the corresponding blood vessel walls, allowing the outer sheath 1 and intermediate catheter 2 to stabilize in the target position after entering the blood vessel. During the detection process, the final operation step only requires controlling the working catheter 3 to move and transport within the blood vessel to perform relevant detection and drug administration.

[0022] As a preferred embodiment, Figure 2 As shown, the other end of the outer sheath tube 1 is provided with a first connector 13 with a valve, and the other end of the intermediate catheter 2 passes through the first connector 13 .

[0023] In the above embodiment, by assembling the first connector 13 at the other end of the outer sheath tube 1 , the other end of the outer sheath tube 1 can be conveniently connected to other instruments or pipelines via the first connector 13 .

[0024] As a preferred embodiment, the other end of the intermediate conduit 2 is provided with a second joint 23 with a valve, and the other end of the working conduit 3 passes through the second joint 23 .

[0025] In the above embodiment, by assembling the second connector 23 at the other end of the intermediate conduit 2 , the other end of the intermediate conduit 2 can be easily connected to other instruments or pipelines through the second connector 23 .

[0026] It should be noted that the first connector 13 and the second connector 23 can both be conventional catheter connectors, and the specific models can be flexibly selected according to actual needs. Since the connectors are products of the existing technology, their structure and use will not be described in detail here.

[0027] As a preferred embodiment, one end of the working conduit 3 is provided with an elastic elbow 31 .

[0028] In the above embodiment, since the working catheter 3 is transported and moved in a thinner branch blood vessel, the design of the elastic elbow 31 is conducive to the working catheter 3 to adaptively adjust the angle and orientation along the direction of the branch blood vessel, which is conducive to the smooth transportation of the working catheter 3.

[0029] In this embodiment, the diameter of the outer sheath tube 1 is 8F-10F, and the diameter of the intermediate catheter 2 is 5F-7F.

[0030] As a preferred embodiment, a first air path connector is provided at the other end of the first air flow channel 12 , and a second air path connector is provided at the other end of the second air flow channel 22 .

[0031] In the above embodiment, the other end of the first air flow cavity 12 is connected to the first air path connector adapted thereto, through which it can be well connected to the inflation device. Similarly, the other end of the second air flow cavity 22 is connected to the second air path connector adapted thereto, through which it can be well connected to the inflation device.

[0032] It should be noted that the first gas path connector and the second gas path connector can both be gas medium connectors commonly used in pipelines of medical equipment, which are common in other types of catheters. In actual use, the adapter model can be flexibly and reasonably selected according to needs. Since the connectors are all products of existing technology, their structure and use will not be described in detail here.

[0033] As a preferred embodiment, one end of the outer sheath tube 1, one end and the tube body of the intermediate catheter 2, and one end and the tube body of the working catheter 3 are respectively provided with a developing ring.

[0034] In the above embodiment, the design of the developing ring is conducive to visualization under the instrument, providing the doctor with an indication of the position of the catheter, and effectively saving operation time.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0040] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention. The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pulmonary artery multi-stage delivery catheter, characterized in that: The invention comprises an outer sheath tube (1), an intermediate catheter (2) and a working catheter (3), wherein the outer wall of one end of the outer sheath tube (1) is provided with a first balloon (11), the outer sheath tube (1) is provided with a first airflow channel (12) passing through the side wall of the other end thereof, one end of the first airflow channel (12) is communicated with the first balloon (11), the intermediate catheter (2) passes through one end of the outer sheath tube (1), the outer wall of one end of the intermediate catheter (2) is provided with a second balloon (21), the intermediate catheter (2) is provided with a second airflow channel (22) passing through the side wall of the other end thereof, one end of the second airflow channel (22) is communicated with the second balloon (21), and the working catheter (3) passes through one end of the intermediate catheter (2).

2. A pulmonary artery multi-stage delivery catheter according to claim 1, characterized in that: The other end of the outer sheath tube (1) is provided with a first connector (13) with a valve, and the other end of the intermediate conduit (2) passes through the first connector (13).

3. A pulmonary artery multi-stage delivery catheter according to claim 2, characterized in that: The other end of the intermediate conduit (2) is provided with a second joint (23) with a valve, and the other end of the working conduit (3) passes through the second joint (23).

4. The pulmonary artery multi-stage delivery catheter according to claim 1, characterized in that: One end of the working conduit (3) is provided with an elastic elbow (31).

5. The pulmonary artery multi-stage delivery catheter according to claim 1, characterized in that: The diameter of the outer sheath tube (1) is 8F-10F, and the diameter of the intermediate catheter (2) is 5F-7F.

6. The pulmonary artery multi-stage delivery catheter according to claim 1, characterized in that: The other end of the first air flow cavity (12) is provided with a first air path connector, and the other end of the second air flow cavity (22) is provided with a second air path connector.

7. The pulmonary artery multi-stage delivery catheter according to claim 1, characterized in that: One end of the outer sheath tube (1), one end and the tube body of the intermediate catheter (2), and one end and the tube body of the working catheter (3) are respectively provided with developing rings.

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