Bubble adsorption device for extracorporeal circulation pipeline connection

Abstract

The utility model discloses a bubble adsorption device for extracorporeal circulation pipeline connection, which comprises an arc-shaped connecting pipe, an exhaust structure for automatically adsorbing air in blood is arranged in the middle of the outer arc-shaped surface of the arc-shaped connecting pipe, and clamping structures are arranged at the two ends of the arc-shaped connecting pipe. Wherein one clamping structure is connected with a heart aorta cannula, and the other clamping structure is connected with an access pipe of a body temperature circulator. In the heart aorta cannula and heart open surgery process, along with blood diversion, air in blood can be rapidly separated from the blood, and the blood can be rapidly separated from the heart aorta cannula; and meanwhile, the two ends of the arc-shaped connecting pipe can be quickly connected with the heart aorta cannula and an access pipe of the body temperature circulator, and the connecting stability is good.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a bubble adsorption device for connecting extracorporeal circulation pipelines. Background Technology

[0002] During open-heart surgery, extracorporeal circulation is required to replace the heart and lungs in maintaining systemic circulation and respiratory function. This involves inserting multiple extracorporeal circulation lines into the patient's heart, such as venous drainage tubes, arterial supply tubes, and cardioplegic solution cooling perfusion lines. Venous blood is drained to the outside through the venous drainage tubes, undergoes effective gas exchange, and is then injected back into the body through the arterial tubes. Due to the establishment of extracorporeal circulation, the patient's other vital organs and tissues, except for the heart, still receive a supply of blood and oxygen to maintain their function. During extracorporeal circulation, air needs to be removed from the blood.

[0003] A dynamic bubble capture device for an extracorporeal circulation arterial line, as disclosed in utility model patent application CN208031589U, includes an upper tube body, a lower tube body connected to the upper tube body, and a bubble collection tube fixed to the tail of the lower tube body. The upper tube body includes a connecting end, a conical air inlet, and a constant diameter section. The lower tube body includes a smoothly transitioning variable diameter section, a tail, and a connecting end. A spiral is fixed inside the constant diameter section of the upper tube body, and the spiral is adjacent to the large end of the variable diameter section of the lower tube body. One end of the bubble collection tube extends into the tail of the lower tube body as an insertion end, and the axis of the insertion end of the bubble collection tube is coaxial with the axes of the upper tube body and the lower tube body. In clinical use, this solution can accelerate the centrifugal force generated to make the blood flow against the inner wall of the device, and concentrate these microbubbles at the center of the blood flow before the blood circulates back into the patient. The microbubbles are discharged through the bubble collection tube, preventing the gas bubbles from merging into the blood and forming embolisms in the blood vessels. However, the above-mentioned technical solution cannot quickly collect and discharge air in the blood during aortic cannulation or open cardiac surgery, which affects the surgical process. At the same time, it cannot be quickly connected to the cannula and the body temperature circulation machine, which is inconvenient to use. Therefore, we propose a bubble adsorption device for connecting extracorporeal circulation pipelines. Utility Model Content

[0004] The purpose of this invention is to provide a bubble adsorption device for connecting extracorporeal circulation tubing, in order to solve the problems mentioned in the background art, such as the inability to quickly collect and expel air from the blood during aortic cannulation and open cardiac surgery, which affects the surgical process, and the inability to quickly connect with the cannula and the body temperature circulation machine, which is inconvenient to use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a bubble adsorption device for connecting extracorporeal circulation pipelines, comprising an arc-shaped connecting tube, wherein an exhaust structure for automatically adsorbing air in the blood is provided in the middle of the outer arc-shaped surface of the arc-shaped connecting tube, and a snap-fit ​​structure is provided at both ends of the arc-shaped connecting tube, wherein one of the snap-fit ​​structures is connected to the aortic cannula, and the other of the snap-fit ​​structure is connected to the inlet tube of the body temperature circulation machine.

[0006] Preferably, the exhaust structure includes a horizontally arranged PTFE membrane, and an air inlet cavity is formed in the arc-shaped connecting pipe on the upper side of the PTFE membrane. By setting the PTFE membrane, air in the blood can be adsorbed, so that the air and blood can be separated.

[0007] Preferably, an exhaust port is provided on the arc-shaped connecting pipe on one side of the PTFE film, and the exhaust port is connected to the arc-shaped air storage cover, which can collect the collected air in a centralized manner.

[0008] Preferably, the arc-shaped air reservoir is disposed on the outer arc-shaped surface of the arc-shaped connecting pipe.

[0009] Preferably, an exhaust pipe is also provided on one side of the arc-shaped air storage cover, and a quick connector is provided at one end of the exhaust pipe. Through the quick connector, it can be connected to a negative pressure suction device to discharge air.

[0010] Preferably, the snap-fit ​​structure includes an outer connector disposed at both ends of the arc-shaped connecting tube, and an inner connector disposed inside the outer connector for quick snap-fit ​​with the access tube of the cardiac aortic cannula or the extracorporeal circulation machine, thereby enabling the arc-shaped connecting tube to be connected to the cardiac aortic cannula and the access tube of the extracorporeal circulation machine.

[0011] Preferably, the inner connector includes a tapered connecting tube with a tapered through hole inside, the tapered through hole communicating with a guide hole, and the guide hole being located in the middle of the outer connector, enabling quick engagement with the aortic cannula and the access tube of the extracorporeal circulation machine.

[0012] Preferably, the outer surface of the tapered connecting tube is provided with auxiliary fixing parts arranged in a tower shape, which improves the stability of the connection of the aortic cannula and the access tube of the extracorporeal circulation machine.

[0013] Preferably, the inner wall of the external connector is also provided with an elastic sealing ring, which improves the sealing performance when connected to the aortic cannula and the access tube of the extracorporeal circulation machine.

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

[0015] (1) In the process of aortic cannulation and open heart surgery, this utility model can quickly separate the air in the blood from the blood as the blood is guided, and can concentrate the air to be discharged.

[0016] (2) When in use, this utility model can quickly connect the two ends of the arc-shaped connecting tube to the aortic cannula and the access tube of the body temperature circulation machine, and the connection stability is good. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a half-sectional schematic diagram of the exhaust structure in this utility model;

[0019] Figure 3 This is a half-sectional view of the snap-fit ​​structure in this utility model;

[0020] Figure 4 This is a schematic diagram of the internal connector in this utility model;

[0021] In the diagram: 1. Exhaust structure; 2. Snap-fit ​​structure; 3. Arc-shaped connecting pipe; 11. PTFE membrane; 12. Exhaust port; 13. Arc-shaped air reservoir; 14. Exhaust pipe; 15. Quick connector; 16. Air inlet cavity; 21. External connector; 22. Elastic sealing ring; 23. Tapered through hole; 24. Tapered connecting pipe; 25. Guide hole; 26. Auxiliary fixing part. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-2 This utility model provides a technical solution: a bubble adsorption device for connecting extracorporeal circulation pipelines, including an arc-shaped connecting pipe 3. An exhaust structure 1 for automatically adsorbing air in the blood is provided in the middle of the outer arc-shaped surface of the arc-shaped connecting pipe 3. The exhaust structure 1 includes a horizontally arranged PTFE film 11. An air inlet cavity 16 is formed in the arc-shaped connecting pipe 3 above the PTFE film 11. By setting the PTFE film 11, air in the blood can be adsorbed, so that the air and blood are separated.

[0024] First, one end of the arc-shaped connecting tube 3 is connected to the aortic cannula and the access tube of the extracorporeal circulation machine through the snap-fit ​​structure 2. During the cannulation process, the heart blood flows into the aortic cannula and is delivered into the arc-shaped connecting tube 3. When the heart blood passes through the PTFE membrane 11, due to the air-permeable and water-permeable properties of the PTFE membrane 11, the air in the heart blood is adsorbed into the air inlet cavity 16 through the PTFE membrane 11, and the air is separated from the heart blood.

[0025] An exhaust port 12 is provided on the arc-shaped connecting pipe 3 on one side of the PTFE membrane 11. The exhaust port 12 is connected to the arc-shaped air storage cover 13, which can guide the collected air into the arc-shaped air storage cover 13. The arc-shaped air storage cover 13 is located on the outer arc-shaped surface of the arc-shaped connecting pipe 3. An exhaust pipe 14 is also provided on one side of the arc-shaped air storage cover 13. A quick connector 15 is provided at one end of the exhaust pipe 14. The quick connector 15 is connected to the negative pressure equipment to discharge the air. The air is discharged by the suction force of the negative pressure equipment.

[0026] Connect the quick connector 15 to the negative pressure device, run the negative pressure device, and the negative pressure device will draw air into the cavity 16 through the negative pressure suction. The gas will be delivered to the arc-shaped air storage hood 13 through the exhaust port 12, and then discharged through the exhaust pipe 14.

[0027] Please see Figure 3 as well as Figure 4 Both ends of the arc-shaped connecting tube 3 are provided with snap-fit ​​structures 2. One snap-fit ​​structure 2 is connected to the aortic cannula, and the other snap-fit ​​structure 2 is connected to the access tube of the extracorporeal circulation machine. The snap-fit ​​structure 2 includes an outer connector 21, which is provided at both ends of the arc-shaped connecting tube 3. An inner connector is also provided inside the outer connector 21, which can connect the arc-shaped connecting tube 3 to the aortic cannula and the access tube of the extracorporeal circulation machine. The inner connector includes a tapered connecting tube 24, which is provided with a tapered through hole 23. The tapered through hole 23 communicates with the guide hole 25. The guide hole 25 is located in the middle of the outer connector 21, which can quickly snap-fit ​​with the aortic cannula and the access tube of the extracorporeal circulation machine.

[0028] During installation, the conical connecting tubes 24 at both ends of the arc-shaped connecting tube 3 are inserted into the aortic cannula and the extracorporeal circulation machine access tube, respectively. The conical connecting tubes 24 are quickly snapped into the inner walls of the aortic cannula and the extracorporeal circulation machine access tube. Cardiac blood is transported through the conical through-hole 23 to the guide hole 25, and then through the guide hole 25 to the arc-shaped connecting tube 3, thus completing the guidance and transport of cardiac blood.

[0029] Furthermore, the outer surface of the tapered connecting tube 24 is provided with auxiliary fixing parts 26 arranged in a tower shape, which improves the stability of the connection of the aortic cannula and the access tube of the extracorporeal circulation machine.

[0030] Furthermore, the inner wall of the external connector 21 is also provided with an elastic sealing ring 22. When the arc-shaped connecting tube 3 is connected to the cardiac aortic cannula and the extracorporeal circulation machine access tube, the elastic sealing ring 22 fits against the outer surface of the cardiac aortic cannula and the extracorporeal circulation machine access tube, thereby improving the sealing performance when connected to the cardiac aortic cannula and the extracorporeal circulation machine access tube.

[0031] The PTFE film 11 in this application is a microporous film manufactured using special processes such as calendering, extrusion, and biaxial stretching. PTFE film 11 can be categorized by application as clothing film, air filtration film, and air purification film. PTFE film 11 possesses a fibrous microporous structure with a porosity exceeding 85%, containing 1.4 billion micropores per square centimeter, with a pore size ranging from 0.02μm to 15μm. It exhibits properties such as air permeability without water permeability, high air permeability, flame retardancy, high temperature resistance, resistance to strong acids and alkalis, and non-toxicity. PTFE film 11 can be a GORE-TEX membrane.

[0032] 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 bubble adsorption device for connecting extracorporeal circulation pipelines, characterized in that: It includes an arc-shaped connecting tube (3), and an exhaust structure (1) for automatically adsorbing air in the blood is provided in the middle of the outer arc surface of the arc-shaped connecting tube (3). Both ends of the arc-shaped connecting tube (3) are provided with snap-fit ​​structures (2), one of the snap-fit ​​structures (2) is connected to the aortic cannula, and the other snap-fit ​​structure (2) is connected to the access tube of the body temperature circulation machine.

2. The bubble adsorption device for connecting extracorporeal circulation pipelines according to claim 1, characterized in that: The exhaust structure (1) includes a horizontally arranged PTFE membrane (11), and an air inlet cavity (16) is formed in the arc-shaped connecting pipe (3) on the upper side of the PTFE membrane (11).

3. The bubble adsorption device for connecting extracorporeal circulation pipelines according to claim 2, characterized in that: An exhaust port (12) is provided on the arc-shaped connecting pipe (3) on one side of the PTFE film (11), and the exhaust port (12) is connected to the arc-shaped air storage cover (13).

4. The bubble adsorption device for connecting extracorporeal circulation pipelines according to claim 3, characterized in that: The arc-shaped air storage cover (13) is set on the outer arc-shaped surface of the arc-shaped connecting pipe (3).

5. A bubble adsorption device for connecting extracorporeal circulation pipelines according to claim 3 or 4, characterized in that: An exhaust pipe (14) is also provided on one side of the arc-shaped air storage cover (13), and a quick connector (15) is provided at one end of the exhaust pipe (14).

6. The bubble adsorption device for connecting extracorporeal circulation pipelines according to claim 1, characterized in that: The snap-fit ​​structure (2) includes an outer connector (21), which is located at both ends of the arc-shaped connecting tube (3). The outer connector (21) is also provided with an inner connector for quick snap-fit ​​with the access tube of the cardiac aortic cannula or the extracorporeal circulation machine.

7. A bubble adsorption device for connecting extracorporeal circulation pipelines according to claim 6, characterized in that: The inner connector includes a tapered connecting pipe (24), and a tapered through hole (23) is provided inside the tapered connecting pipe (24). The tapered through hole (23) is connected to the guide hole (25), and the guide hole (25) is located in the middle of the outer connector (21).

8. A bubble adsorption device for connecting extracorporeal circulation pipelines according to claim 7, characterized in that: The outer surface of the tapered connecting pipe (24) is provided with auxiliary fixing parts (26) arranged in a tower shape.

9. A bubble adsorption device for connecting extracorporeal circulation pipelines according to claim 6 or 7, characterized in that: The inner wall of the external connector (21) is also provided with an elastic sealing ring (22).

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