Angiographic catheter with pressure relief function

Abstract

The utility model belongs to the technical field of angiographic catheters, and particularly relates to an angiographic catheter with a pressure relief function, which comprises an injection head, the lower end of the injection head is fixedly connected with a catheter body, the inner wall of a hard tube of the catheter body is slidably connected with a mounting cylinder, and the inclined surface of the injection head is fixedly connected with a fixing frame. The inner wall of the fixing frame is slidably connected with a sliding block, the end face of the sliding block is fixedly connected with a limiting plate, the limiting plate is slidably connected with the fixing frame, the lower end of the sliding block is fixedly connected with an inserting rod, and the inserting rod is slidably connected with the mounting cylinder. Under the action of the second spring and the plug, the space between the mounting cylinder and the catheter body can be plugged for use, and after a contrast agent is injected, the plug can push the second spring to deform under the change of internal and external pressure, so that the mounting cylinder is in a circulating state, and the catheter body is automatically decompressed for use.

Description

Technical Field

[0001] This utility model relates to the field of angiography catheter technology, specifically an angiography catheter with pressure relief function. Background Technology

[0002] As is well known, angiography catheters are medical devices used to inject contrast agents during medical imaging, helping doctors to observe blood vessels and cavities more clearly. These include cardiovascular angiography (such as coronary angiography), cerebral angiography (such as intracranial angiography), and urinary system angiography (such as pyelography).

[0003] A utility model patent with patent authorization announcement number CN211132628U discloses an imaging catheter, including a handle, a catheter body, and a catheter tip. The handle is connected to one end of the catheter body, and the catheter tip is connected to the other end of the catheter body. The inner peripheral wall of the catheter body is axially covered with a stainless steel braided mesh that can be visualized under X-ray. The catheter tip is made of a flexible plastic material, and the flexible plastic material is mixed with a visualizer material that can be visualized under X-ray. A metal visualizer ring that can be visualized under X-ray is embedded on the inner peripheral wall of the catheter tip.

[0004] However, existing contrast catheters also have certain shortcomings. When contrast agents are injected, the pressure difference between the inside and outside of the catheter can cause the catheter to expand and become damaged. Utility Model Content

[0005] The purpose of this invention is to provide an angiography catheter with pressure relief function, which solves the problem that existing angiography catheters are prone to expansion and damage due to pressure changes caused by pressure differences between the inside and outside of the catheter when contrast agents are injected.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an angiography catheter with pressure relief function, comprising an injection head, a catheter body fixedly connected to the lower end of the injection head, an installation cylinder slidably connected to the rigid inner wall of the catheter body, a fixing frame fixedly connected to the inclined surface of the injection head, a slider slidably connected to the inner wall of the fixing frame, a limit plate fixedly connected to the end face of the slider, the limit plate slidably connected to the fixing frame, an insertion rod fixedly connected to the lower end of the slider, the insertion rod slidably connected to the installation cylinder, and a pressure relief mechanism provided on the installation cylinder.

[0007] Preferably, a spring is welded to the upper end of the slider, and the other end of the spring is welded to the fixed frame. The slider can be connected and used by means of the spring.

[0008] Preferably, two limiting plates are provided, which are symmetrically distributed on the slider. By setting the limiting plates, the slider can be moved and limited.

[0009] Preferably, the pressure relief mechanism includes a flow hole. The right end of the mounting cylinder has a flow hole, and a plug is slidably connected to the inner wall of the flow hole. The plug is slidably connected to the mounting cylinder. Two evenly distributed blocks are fixedly connected to the inner wall of the mounting cylinder. A telescopic rod is slidably connected between the two blocks. The telescopic rod is fixedly connected to the plug. A connecting plate is fixedly connected to the left end of the telescopic rod. The connecting plate contacts the mounting cylinder. A second spring is provided on the outer side of the telescopic rod. Through the setting of the second spring and the plug, the mounting cylinder can be sealed.

[0010] Preferably, the vertical part of the plug is fixedly connected to two evenly distributed guide blocks, each of which is slidably connected to the mounting cylinder. The plug can be moved and guided by the guide blocks.

[0011] Preferably, one end of the second spring is welded to the stop block, and the other end of the second spring is welded to the connecting plate. The connecting plate can be connected and used by setting the second spring.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model pushes the installation cylinder into the rigid tube part of the conduit body. Under the deformation of the spring, the slider can drive the insertion rod to insert into the installation cylinder, limiting the installation cylinder and making the installation cylinder in a stable connection, which is convenient for operators to install and use quickly.

[0014] 2. This utility model can seal the space between the installation cylinder and the conduit body under the action of the spring and the plug. After the contrast agent is injected, the change in internal and external pressure will cause the plug to push the spring to deform, thereby putting the installation cylinder into a flow state and automatically depressurizing the conduit body. Attached Figure Description

[0015] Figure 1 This is a perspective view of the overall structure of this utility model;

[0016] Figure 2 For the present utility model Figure 1 Side view;

[0017] Figure 3 For the present utility model Figure 1 A front sectional view;

[0018] Figure 4 For the present utility model Figure 2 Enlarged view of point A;

[0019] Figure 5 For the present utility model Figure 3 Enlarged view of the pressure relief structure.

[0020] In the diagram: 1. Injection head; 2. Catheter body; 3. Mounting cylinder; 4. Fixing frame; 5. Slider; 6. Spring 1; 7. Limiting plate; 8. Insert rod; 9. Pressure relief mechanism; 91. Flow hole; 92. Plug; 93. Guide block; 94. Stop block; 95. Telescopic rod; 96. Connecting plate; 97. Spring 2. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 An angiography catheter with pressure relief function includes an injection head 1. The lower end of the injection head 1 is fixedly connected to a catheter body 2. The rigid inner wall of the catheter body 2 is slidably connected to an installation cylinder 3. The inclined surface of the injection head 1 is fixedly connected to a fixing frame 4. The inner wall of the fixing frame 4 is slidably connected to a slider 5. The end face of the slider 5 is fixedly connected to a limiting plate 7. The limiting plate 7 is slidably connected to the fixing frame 4. The lower end of the slider 5 is fixedly connected to an insertion rod 8. The insertion rod 8 is slidably connected to the installation cylinder 3.

[0023] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 A spring 6 is welded to the upper end of the slider 5, and the other end of the spring 6 is welded to the fixed frame 4. The slider 5 can be connected and used through the setting of the spring 6. There are two limit plates 7, which are symmetrically distributed on the slider 5. The slider 5 can be moved and limited through the setting of the limit plates 7.

[0024] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5The mounting cylinder 3 is equipped with a pressure relief mechanism 9, which includes a flow hole 91. The right end of the mounting cylinder 3 has a flow hole 91, and a plug 92 is slidably connected to the inner wall of the flow hole 91. The plug 92 is slidably connected to the mounting cylinder 3. The inner wall of the mounting cylinder 3 is fixedly connected with two evenly distributed blocks 94. A telescopic rod 95 is slidably connected between the two blocks 94. The telescopic rod 95 is fixedly connected to the plug 92. The left end of the telescopic rod 95 is fixedly connected to a connecting plate 96, which contacts the mounting cylinder 3. A second spring 97 is provided on the outside of the telescopic rod 95. Through the setting of the second spring 97 and the plug 92, the mounting cylinder 3 can be sealed.

[0025] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 The vertical part of the plug 92 is fixedly connected to two evenly distributed guide blocks 93. Each guide block 93 is slidably connected to the mounting cylinder 3. The plug 92 can be moved and guided by the guide blocks 93. One end of the spring 97 is welded to the stop block 94, and the other end of the spring 97 is welded to the connecting plate 96. The connecting plate 96 can be connected and used by the spring 97.

[0026] The specific implementation process of this utility model is as follows: In use, by pushing the limiting plate 7 upward, the limiting plate 7 moves along the surface of the fixed frame 4, thereby driving the slider 5 to slide stably along the inner wall of the fixed frame 4, causing the spring 6 to deform and drive the insertion rod 8 to move. Then, the mounting cylinder 3 is pushed into the guide tube body 2, and the limiting plate 7 is released so that the spring 6 returns to its original deformation, thereby pushing the slider 5 to drive the insertion rod 8 downward, so that the insertion rod 8 is inserted into the mounting cylinder 3, limiting the mounting cylinder 3 and making the mounting cylinder 3 stable.

[0027] Through the deformation of spring 97 and the action of plug 92, the rigid tube between the installation cylinder 3 and the catheter body 2 can be sealed. When contrast agent is injected into the catheter body 2, the pressure difference between the inside and outside of the catheter body 2 will change. Under the pressure, plug 92 can be pushed to the left to move the telescopic rod 95 and the connecting plate 96. Spring 97 deforms, so that the flow hole 91 is in a flow state, thereby automatically depressurizing the catheter body 2 and avoiding the problem of expansion and damage to the catheter body 2.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A contrast catheter with pressure relief function, comprising an injection head (1), characterized in that: The lower end of the injection head (1) is fixedly connected to the catheter body (2), the inner wall of the rigid tube of the catheter body (2) is slidably connected to the mounting cylinder (3), the inclined surface of the injection head (1) is fixedly connected to the fixing frame (4), the inner wall of the fixing frame (4) is slidably connected to the slider (5), the end face of the slider (5) is fixedly connected to the limiting plate (7), the limiting plate (7) is slidably connected to the fixing frame (4), the lower end of the slider (5) is fixedly connected to the insertion rod (8), the insertion rod (8) is slidably connected to the mounting cylinder (3), and the mounting cylinder (3) is provided with a pressure relief mechanism (9).

2. The contrast catheter with pressure relief according to claim 1, wherein: A spring (6) is welded to the upper end of the slider (5), and the other end of the spring (6) is welded to the fixed frame (4).

3. The contrast catheter with pressure relief according to claim 1, wherein: There are two limiting plates (7), which are symmetrically distributed on the slider (5).

4. The angiography catheter with pressure relief function according to claim 1, characterized in that: The pressure relief mechanism (9) includes a flow hole (91). The right end of the mounting cylinder (3) is provided with a flow hole (91). A plug (92) is slidably connected to the inner wall of the flow hole (91). The plug (92) is slidably connected to the mounting cylinder (3). Two evenly distributed blocks (94) are fixedly connected to the inner wall of the mounting cylinder (3). A telescopic rod (95) is slidably connected between the two blocks (94). The telescopic rod (95) is fixedly connected to the plug (92). A connecting plate (96) is fixedly connected to the left end of the telescopic rod (95). The connecting plate (96) is in contact with the mounting cylinder (3). A spring (97) is provided on the outer side of the telescopic rod (95).

5. The contrast catheter with pressure relief according to claim 4, wherein: The vertical part of the plug (92) is fixedly connected to two evenly distributed guide blocks (93), and each guide block (93) is slidably connected to the mounting cylinder (3).

6. The contrast catheter with pressure relief according to claim 4, wherein: One end of the second spring (97) is welded to the stop block (94), and the other end of the second spring (97) is welded to the disc (96).

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