Artificial heart-lung machine pipeline for filtering gas

Abstract

The utility model discloses an artificial heart-lung machine pipeline for filtering gas, and relates to the technical field of artificial heart-lung machine pipelines, the artificial heart-lung machine pipeline comprises a blood pump, an oxygenator and a filter, the blood pump is communicated with the oxygenator through a pipeline, the oxygenator is communicated with the bottom end of the filter through a pipeline, a membrane filter cartridge is arranged in the filter, and the membrane filter cartridge is communicated with the filter through a pipeline. And the filter is connected with an artery connecting pipe. Through the arrangement of the membrane filter cartridge, blood is conveyed through the blood pump and conveyed into the oxygenator, oxygenation and carbon dioxide removal are carried out on the blood through the oxygenator, and after the blood enters the oxygenator, the oxygenator can undertake a gas exchange task, so that the lungs of a patient enter a rest state; precious time is obtained for rehabilitation of a patient, bubbles may appear in a blood pump, an oxygenator or a pipeline during operation of the ECMO machine, the bubbles in blood are filtered by the membrane filter cartridge, and gas is prevented from entering self circulation of a human body.

Description

Technical Field

[0001] The utility model relates to the technical field of artificial cardiopulmonary machine pipelines, and specifically relates to an artificial cardiopulmonary machine pipeline for filtering gas. Background Technique

[0002] An artificial cardiopulmonary machine is an important life support system used to treat severe cardiopulmonary failure. It maintains the oxygen supply and circulatory support functions of the body by pumping the patient's blood out of the body, oxygenating it, removing carbon dioxide, and then re-infusing it back into the body.

[0003] During the use of existing artificial cardiopulmonary machines, the pipelines of the machines are not convenient for screening and filtering the gas generated in the pipelines during circulation. When the pre-filling and exhaust are not thorough, and the ECMO venous end is in a negative pressure state, the damaged sealing of the venous end pipeline can also cause air to enter the pipeline. During the ECMO bypass process, poor venous drainage or pipeline folding can cause the negative pressure state at the venous end to increase, resulting in gas precipitation from the blood to form micro-air emboli. If not treated in a timely and effective manner, air can also enter the oxygenator and arterial pipeline, and ultimately enter the patient's circulatory system. During the ECMO process, excessive oxygenation of the blood and too high arterial oxygen partial pressure can cause oxygen to precipitate from the blood to form micro-bubbles. All of the above situations may cause the patient to develop air embolism and endanger life.

[0004] Therefore, in view of the deficiencies of the existing structure, research and improvement are carried out, and an artificial cardiopulmonary machine pipeline for filtering gas is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide an artificial cardiopulmonary machine pipeline for filtering gas to solve the problem of inconvenient screening and filtering of gas in the blood proposed in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: an artificial cardiopulmonary machine pipeline for filtering gas, including a blood pump, an oxygenator, a filter and a connecting pipeline part. The blood pump and the oxygenator are connected through a pipeline. The oxygenator is connected to the bottom end of the filter through a pipeline. A membrane filter cylinder is arranged inside the filter. An arterial connecting pipe is connected to the filter. A venous connecting pipe is connected to the blood pump.

[0007] Further, the filter is provided with thread teeth arranged in an array.

[0008] Further, a threaded block is threadedly connected inside the filter, and the threaded block is threadedly connected to the thread teeth.

[0009] Further, the top of the membrane filter cylinder is fixedly connected to the bottom of the threaded block.

[0010] Further, the membrane filter cartridge is made of a polymer material. The polymer material is polycarbonate, which is a material used for screening air bubbles in blood. Polycarbonate has excellent transparency, biocompatibility, and mechanical properties, and can be widely used in medical devices. During blood processing, by using a microporous membrane or microfilter made of polycarbonate, air bubbles in the blood can be effectively separated.

[0011] Further, the membrane filter cartridge is cylindrical.

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

[0013] 1. Through the setting of the membrane filter cartridge in the present utility model, blood is transported by a blood pump. During the operation of the ECMO machine, air bubbles may appear in the oxygenator or pipeline. The membrane filter cartridge is used to filter air bubbles in the blood, achieving the purpose of filtering gases in the blood, effectively avoiding gases from entering the patient's circulatory system and ultimately causing air embolism in the patient. Description of the Drawings

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 is a three-dimensional structural schematic diagram of the filter.

[0016] In the figure: 1. Blood pump; 2. Venous connecting tube; 3. Oxygenator; 4. Filter; 5. Arterial connecting tube; 6. Threaded teeth; 7. Threaded block; 8. Membrane filter cartridge. Detailed Embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Embodiment 1

[0019] As Figure 1 and Figure 2As shown in the figure, an extracorporeal membrane oxygenation (ECMO) tubing for filtering gases includes a blood pump 1, an oxygenator 3, and a filter 4. The blood pump 1 and the oxygenator 3 are connected through a pipeline. The oxygenator 3 is connected to the bottom end of the filter 4 through a pipeline. A membrane filter cartridge 8 is provided inside the filter 4. An arterial connecting tube 5 is connected to the filter 4, and a venous connecting tube 2 is connected to the blood pump 1. When using the ECMO tubing for filtering gases, the venous connecting tube 2 is connected to the patient's vein. The blood is transported through the blood pump 1 and sent into the oxygenator 3. After the oxygenator 3 oxygenates the blood and removes carbon dioxide, when the blood enters the filter 4, the oxygenator 3 can undertake the gas exchange task, allowing the lungs to rest and gaining valuable time for the patient's recovery. Similarly, when the patient's heart function is severely damaged, the blood pump 1 can replace the heart's blood pumping function to maintain blood circulation. However, during the operation of the ECMO machine, bubbles may appear in the oxygenator 3, the blood pump 1, or the tubing. Through the membrane filter cartridge 8, the membrane filter cartridge 8 is used to filter the bubbles in the blood, achieving the purpose of filtering the gases in the blood, effectively preventing bubbles from entering the patient's circulatory system and ultimately causing air embolism in the patient, endangering life. The blood filtered by the filter 4 returns to the artery through the arterial connecting tube 5, forming a VA loop. The blood pump 1 can replace the heart's blood pumping function for heart support, and the oxygenator 3 provides extracorporeal respiratory support, realizing the practicality of the ECMO tubing for filtering gases.

[0020] Further, threaded teeth 6 are arranged in an array on the filter 4, and the filter 4 provides an installation space for the threaded teeth 6.

[0021] Further, a threaded block 7 is internally threaded in the filter 4, and the threaded block 7 is threadedly connected to the threaded teeth 6. The threaded connection between the threaded teeth 6 and the threaded block 7 limits the threaded block 7 inside the filter 4.

[0022] Further, the top of the membrane filter cartridge 8 is fixedly connected to the bottom of the threaded block 7. After rotating the threaded block 7 to separate it from the threaded teeth 6, the threaded block 7 can be disassembled, and then the membrane filter cartridge 8 can be disassembled and replaced. The membrane filter cartridge 8 is made of a polymer material and is in a cylindrical shape. When the blood enters the filter 4, it will enter the membrane filter cartridge 8. The blood flows outward through the membrane filter cartridge 8, and thus the blood will flow through the membrane filter cartridge 8, and the membrane filter cartridge 8 will filter and screen the bubbles in the blood.

[0023] Working principle: When using this artificial cardiopulmonary machine pipeline for filtering gas, first, the pipeline is pre-filled with liquid. After pre-filling, the venous connecting tube 2 is connected to the patient's vein, and the blood is transported through the blood pump 1 so that the blood is transported into the oxygenator 3. After the oxygenator 3 oxygenates the blood and removes carbon dioxide, when the blood enters the filter 4, the oxygenator 3 can undertake the gas exchange task, enabling the lungs to rest and obtaining precious time for the patient's recovery. Similarly, when the patient's heart function is severely damaged, the blood pump 1 can replace the heart's blood pumping function to maintain blood circulation. However, during the operation of the ECMO machine, bubbles may appear in the oxygenator, blood pump or pipeline. Through the membrane filter cartridge 8, the membrane filter cartridge 8 is used to filter the bubbles in the blood to achieve the purpose of filtering the gas in the blood, effectively avoiding bubbles from entering the patient's circulatory system and ultimately causing air embolism in the patient, endangering life. The blood filtered by the filter 4 returns to the artery through the arterial connecting tube 5 to form a VA loop. The blood pump 1 can replace the heart's blood pumping function for heart support, and the oxygenator 3 provides extracorporeal respiratory support, realizing the practicality of the artificial cardiopulmonary machine pipeline for filtering gas.

[0024] This is the working principle of this artificial cardiopulmonary machine pipeline for filtering gas.

[0025] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

Claims

1. A gas filtering artificial heart-lung machine circuit, comprising a blood pump (1), an oxygenator (3) and a filter (4), characterized in that: The blood pump (1) and the oxygenator (3) are connected via a pipeline, the oxygenator (3) is connected via a pipeline to the bottom end of the filter (4), a membrane filter cartridge (8) is provided inside the filter (4), an arterial connecting tube (5) is connected to the filter (4), and a venous connecting tube (2) is connected to the blood pump (1).

2. A gas filtering artificial heart-lung machine pipeline according to claim 1, characterized in that: The filter (4) is provided with threaded teeth (6) in an array.

3. The gas filtering artificial heart-lung machine pipeline according to claim 1, characterized in that: The filter (4) is internally threadedly connected with a thread block (7), and the thread block (7) is threadedly connected to the thread teeth (6).

4. The gas filtering artificial heart-lung machine pipeline according to claim 1, characterized in that: The top of the membrane filtration cartridge (8) is fixedly connected to the bottom of the threaded block (7).

5. The gas filtering artificial heart-lung machine pipeline according to claim 1, characterized in that: The membrane filter cartridge (8) is made of polymer material.

6. The gas filtering artificial heart-lung machine pipeline according to claim 5, characterized in that: The membrane filter cartridge (8) is in a cylindrical shape.

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