Inferior vena cava drainage tube for cardiac surgery extracorporeal circulation operation

Abstract

The utility model discloses an inferior vena cava drainage tube for cardiac surgery extracorporeal circulation operation, which belongs to the technical field of medical instruments and comprises a drainage tube body, a plurality of external connection blocks are fixedly connected to the rear end of the outer wall of the drainage tube body at equal intervals, and guide grooves are formed in the inner walls of the external connection blocks. The left end and the right end of the inner wall of the guide groove are slidably connected with limiting blocks, the left end and the right end of the outer wall of each limiting block are fixedly connected with magnetic plates, and a flow guide mechanism is arranged in the middle of the inner wall of the drainage tube body and comprises a one-way valve installed in the middle of the inner wall of the drainage tube body. The inner wall of each external connection block is designed to be one sixth of that of a pipe body, the limiting blocks are rotated after the drainage pipe is clamped into a connector of the extracorporeal circulation machine, the limiting blocks in the two different external connection blocks can be attracted through the magnetic plates on the outer walls of the limiting blocks, and therefore a closed loop is formed, and the connection stability of the external connection blocks is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to an inferior vena cava drainage tube for extracorporeal circulation surgery in cardiac surgery. Background Technology

[0002] In cardiac cardiopulmonary bypass surgery, most procedures require the insertion of venous drainage tubes into the superior and inferior vena cava to allow for the opening of the right atrium or atrial septum, enabling open-heart surgery.

[0003] Chinese Patent Publication No. CN211611238U discloses an inferior vena cava drainage tube for cardiopulmonary bypass surgery in cardiac surgery. The design includes a tube body, one end of which is an external end that protrudes through the skin and connects to the cardiopulmonary bypass machine, and the other end of which is an internal end that connects to the inferior vena cava. The external end has a beveled structure, and a flexible sealing membrane that can fold upwards is provided at the end of the beveled structure. The internal end is conical, and several drainage holes are provided on the conical shape. This invention facilitates the inferior vena cava drainage tube's protrusion through the skin and avoids the entry of fat particles and other tissues into the tube during the protrusion process, greatly reducing the possibility of tube embolism. This helps to ensure a smooth and successful completion of the surgery and improves surgical safety. However, in actual use, the device is prone to displacement and blood backflow, resulting in certain limitations in its operation.

[0004] Therefore, a superior vena cava drainage tube for cardiopulmonary bypass surgery in cardiac surgery is proposed to address the above problems. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide an inferior vena cava drainage tube for cardiac cardiopulmonary bypass surgery. It can achieve the following by designing the inner wall of the external connecting block to be one-sixth of the tube body. After the drainage tube is inserted into the interface of the cardiopulmonary bypass machine, the limiting block is rotated. The magnetic plate on the outer wall of the limiting block can attract the limiting blocks in two different external connecting blocks, thereby forming a closed loop and ensuring the stability of the connection.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A lower vena cava drainage tube for cardiopulmonary bypass surgery includes a drainage tube body. Multiple external blocks are fixedly connected at equal intervals to the rear end of the outer wall of the drainage tube body. A guide groove is formed on the inner wall of each external block. Limiting blocks are slidably connected to the left and right ends of the inner wall of the guide groove. Magnetic plates are fixedly connected to the left and right ends of the outer wall of each limiting block. A flow guiding mechanism is provided in the middle of the inner wall of the drainage tube body.

[0010] Furthermore, the flow guiding mechanism includes a one-way valve, which is installed in the middle of the inner wall of the drainage tube body. A valve disc is fixedly connected to the outer wall of the one-way valve, and an inner connecting ring is fixedly connected to the right end of the middle of the inner wall of the drainage tube body. The inner connecting ring matches the size of the valve disc.

[0011] Furthermore, the drainage tube body is made of a flexible material.

[0012] Furthermore, the outer wall of the drainage tube body has multiple drainage holes equidistantly opened at the front end, and the drainage holes are arranged radially.

[0013] Furthermore, a fixing block is fixedly connected to the front end of the outer wall of the limiting block.

[0014] Furthermore, multiple fixed wings are fixedly connected at equal intervals to the rear end of the outer wall of the drainage tube near the outer connecting block.

[0015] 3. Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] (1) This solution designs the inner wall of the external block to be one-sixth of the tube body. After inserting the drainage tube into the interface of the extracorporeal circulation machine, the limiting block is rotated. The magnetic plate on the outer wall of the limiting block can attract the limiting blocks in the two different external blocks, thereby forming a closed loop and ensuring the stability of the connection.

[0018] (2) This solution can be used according to the blood flow direction in actual use by using a combination of one-way valve, valve disc and inner ring, while avoiding blood backflow that may affect patient safety. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a partial cross-sectional view of the present invention.

[0021] Figure 3 This is a partial structural schematic diagram of the present invention.

[0022] Explanation of the labels in the diagram:

[0023] 1. Drainage tube body; 2. Flow guiding mechanism; 201. Check valve; 202. Valve disc; 203. Inner connecting ring; 3. Outer connecting block; 4. Guide groove; 5. Limiting block; 6. Magnetic plate; 7. Fixing block; 8. Drainage hole; 9. Fixing wing. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Example:

[0028] Please see Figure 1 and Figure 3 A lower vena cava drainage tube for cardiopulmonary bypass surgery includes a drainage tube body 1. Multiple external blocks 3 are fixedly connected at equal intervals to the rear end of the outer wall of the drainage tube body 1. The inner wall of the external blocks 3 is provided with a guide groove 4. Limiting blocks 5 are slidably connected to the left and right ends of the inner wall of the guide groove 4. Magnetic plates 6 are fixedly connected to the left and right ends of the outer wall of the limiting blocks 5. A flow guiding mechanism 2 is provided in the middle of the inner wall of the drainage tube body 1. The drainage tube body 1 is made of flexible material.

[0029] This solution allows for the rotation of the limiting block 5 by personnel after it is inserted into the circulation machine through the connection of multiple external blocks 3. The magnetic attraction between the magnetic plates 6 can connect two adjacent limiting blocks 5. When the limiting blocks 5 in two different external blocks 3 are connected, the whole can form a closed loop, thereby ensuring the stability of the connection between the drainage tube body 1 and the circulation machine. When the limiting block 5 in the same external block 3 is attracted, it can ensure that its size matches the external block 3, without affecting the insertion or removal of the drainage tube from the circulation machine. The drainage tube is made of flexible material, which can adapt to the physiological curvature of the inferior vena cava.

[0030] Please see Figure 1 and Figure 2 The flow guiding mechanism 2 includes a one-way valve 201, which is installed in the middle of the inner wall of the drainage pipe body 1. A valve disc 202 is fixedly connected to the outer wall of the one-way valve 201. An inner ring 203 is fixedly connected to the right end of the middle of the inner wall of the drainage pipe body 1. The inner ring 203 matches the size of the valve disc 202.

[0031] This solution involves installing a one-way valve 201 inside the drainage tube body 1. The one-way valve 201 can drain blood while preventing backflow, thus ensuring the patient's safety and facilitating surgical procedures for medical staff, thereby increasing the success rate of the surgery.

[0032] Please see Figure 1 and Figure 3 The outer wall of the drainage tube body 1 has multiple drainage holes 8 at equal intervals at the front end, and the drainage holes 8 are arranged radially; the outer wall of the limiting block 5 is fixedly connected to the front end of the limiting block 5; the outer wall of the drainage tube body 1 has multiple fixed wings 9 at equal intervals near the outer connecting block 3 at the rear end of the outer wall.

[0033] This solution increases the drainage area and improves the drainage effect by opening multiple drainage holes 8 at the front end of the outer wall of the drainage tube; the fixing block 7 makes it easy for personnel to control the rotation of the limiting block 5; and the fixing wing 9 is fixedly connected to the outer wall of the drainage tube body 1 to fix the drainage tube in a proper position and prevent it from shifting.

[0034] Working principle: When the device is in use, the front end of the drainage tube body 1 is inserted into the vein, and the rear end of the drainage tube is connected to the interface of the extracorporeal circulation machine. Multiple external blocks 3 are fixedly connected to the outer wall of the drainage tube body 1. The bottom wall of the external block 3 accounts for one-sixth of the outer diameter of the drainage tube. Therefore, the distance between every two external blocks 3 is just enough to fit one external block 3. After the external block 3 is inserted into the circulation machine, medical staff can pull the fixed block 7 to drive the limiting block 5 to slide in the guide groove 4. The magnetic attraction between the magnetic plates 6 can connect the limiting blocks 5 in two different external blocks 3. Since the interval between two external blocks 3 is just the size of one external block 3, it can be ensured that all the limiting blocks 5 form a closed loop after attraction, ensuring the tightness of the connection between the drainage tube and the circulation machine. At the same time, by setting a one-way valve 201, blood backflow can be avoided during drainage, which may affect the patient's safety.

[0035] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. An inferior vena cava drainage tube for cardiopulmonary bypass surgery in cardiac surgery, comprising a drainage tube body (1), characterized in that: Multiple external blocks (3) are fixedly connected at equal intervals to the rear end of the outer wall of the drainage tube body (1). The inner wall of the external block (3) is provided with a guide groove (4). The left and right ends of the inner wall of the guide groove (4) are slidably connected with limit blocks (5). The left and right ends of the outer wall of the limit blocks (5) are fixedly connected with magnetic plates (6). A flow guiding mechanism (2) is provided in the middle of the inner wall of the drainage tube body (1).

2. The inferior vena cava drainage tube for cardiopulmonary bypass surgery according to claim 1, characterized in that: The flow guiding mechanism (2) includes a one-way valve (201), which is installed in the middle of the inner wall of the drainage pipe body (1). A valve disc (202) is fixedly connected to the outer wall of the one-way valve (201). An inner ring (203) is fixedly connected to the right end of the middle of the inner wall of the drainage pipe body (1). The inner ring (203) matches the size of the valve disc (202).

3. The inferior vena cava drainage tube for cardiopulmonary bypass surgery according to claim 1, characterized in that: The drainage tube body (1) is made of flexible material.

4. The inferior vena cava drainage tube for cardiopulmonary bypass surgery according to claim 1, characterized in that: The outer wall of the drainage tube body (1) is provided with multiple drainage holes (8) at equal intervals at the front end, and the drainage holes (8) are arranged radially.

5. The inferior vena cava drainage tube for cardiopulmonary bypass surgery according to claim 1, characterized in that: A fixing block (7) is fixedly connected to the front end of the outer wall of the limiting block (5).

6. The inferior vena cava drainage tube for cardiopulmonary bypass surgery according to claim 1, characterized in that: Multiple fixed wings (9) are fixedly connected at equal intervals at the rear end of the outer wall of the drainage tube body (1) near the outer connecting block (3).

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