Artificial heart-lung machine with ECMO membrane lung convenient to replace

Abstract

The invention discloses an artificial heart-lung machine facilitating replacement of an ECMO membrane lung. The artificial heart-lung machine comprises a femoral artery tube, a communicating tube, a middle tube, the ECMO membrane lung, a centrifugal pump head and a femoral vein tube, wherein the centrifugal pump head and the femoral vein tube are connected with a controller; the femoral artery catheter further comprises a first valve, a third valve and a transverse pipe, the first valve and the third valve are three-way valves, an upper outlet and a lower outlet of the first valve are communicated with the middle pipe, an upper outlet and a lower outlet of the third valve are communicated between the femoral artery catheter and the communicating pipe, and the transverse pipe is communicated between a right outlet of the first valve and a left outlet of the third valve. According to the technical scheme, the ECMO membrane lung can be rapidly replaced, operation is convenient, iatrogenic blood loss is avoided, the medical cost of a patient is saved, and the method has the advantages that safety of the patient in the whole treatment process is guaranteed, and medical care operation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an artificial heart-lung machine that is convenient for replacing an ECMO membrane lung. Background Art

[0002] Extracorporeal Membrane Oxygenation (ECMO), also known as an artificial heart-lung machine, is mainly used to provide continuous extracorporeal respiration and circulation to patients with severe cardiopulmonary failure to maintain their lives. The core parts of the artificial heart-lung machine are the ECMO membrane lung (artificial lung) and the centrifugal pump (artificial heart).

[0003] With the continuous advancement of critical care rescue technology, for patients with ARDS, acute respiratory distress syndrome, severe pneumonia, respiratory failure, and severe heart failure, artificial heart-lung machines can be used clinically to replace the heart and lungs to supply oxygen to the whole body. This technology has been developed in advance in recent years. It uses an inferior vena cava catheter to draw the patient's venous blood out of the body, and then uses the ECMO membrane lung to perform extracorporeal blood oxygenation and carbon dioxide discharge. The oxygenated and converted arterial blood is then transported back to the heart through the superior vena cava to supply all organs of the body. It completely replaces the function of the lungs. The manufacturer recommends that the entire set of artificial heart-lung machine pipelines be used safely for 14 days. The treatment cycle of most critically ill patients far exceeds this period, or when the patient's disease strikes and triggers the body's coagulation mechanism, resulting in a hypercoagulable state of the blood, the artificial heart-lung machine will also be affected by thrombosis. Function, resulting in insufficient oxygen supply, requires replacement of ECMO pipelines, etc.

[0004] Conventional maintenance of artificial heart-lung machines requires the replacement of the entire set of pipelines! Including pipelines, centrifugal pump heads and ECMO membrane lungs. And because it needs to be stopped for replacement, there is a certain degree of damage to patients who rely entirely on artificial heart-lung machines to maintain their lives. Since the speed and flow of ECMO membrane lungs can reach 4-5L / min, the rapid shutdown and replacement operation cannot return the blood in the pipeline, and the remaining blood in the pipeline cannot be returned to the patient's body. Instead, crystalloid and colloid fluids are infused to maintain a suitable blood volume. This situation causes the patient's hemoglobin level to drop, so that when the patient's hemoglobin level drops to a certain level, allogeneic red blood cells need to be transfused. At the same time, the patient's relatively low hemoglobin level is not conducive to hemostasis, thereby increasing the difficulty of hemostasis. Replacing the ECMO pipeline of the artificial heart-lung machine requires shutdown, causing the patient to lose life support in a short period of time; during the replacement process, the remaining blood in the old pipeline cannot be returned, resulting in 400-500ml of iatrogenic blood loss. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an artificial heart-lung machine that is convenient for replacing ECMO membrane lungs, and has the characteristics of simple operation, rapid replacement of ECMO membrane lungs, and the ability to draw back residual blood in the pipeline into the patient's body.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: an artificial heart-lung machine that is convenient for replacing ECMO membrane lungs, including a centrifugal pump head, a femoral vein tube, a femoral artery tube, a connecting tube, an intermediate tube and an ECMO membrane lung connected to a controller; it also includes a first valve, a third valve and a transverse tube, the first valve and the third valve are both three-way valves, the upper and lower outlets of the first valve are connected to the intermediate tube, the upper and lower outlets of the third valve are connected between the femoral artery tube and the connecting tube, and the transverse tube is connected between the side outlet of the first valve and the side outlet of the third valve.

[0007] The above-mentioned artificial heart-lung machine that is convenient for replacing ECMO membrane lungs also includes a fifth valve, a second valve, a fourth valve and a withdrawal tube; the fifth valve is installed on the femoral vein tube, the right port of the second valve is installed on the femoral vein tube between the fifth valve and the centrifugal pump head through a tee, the left port of the second valve is connected to the lower port of the fourth valve through the withdrawal tube, and the upper port of the fourth valve is installed on the connecting tube between the ECMO membrane lung and the third valve through a tee.

[0008] The above-mentioned artificial heart-lung machine that is convenient for replacing the ECMO membrane lung also includes a heat exchanger and a water pipe thereof. The heat exchanger is connected to the inside of the ECMO membrane lung through two water pipes.

[0009] The present invention provides an artificial heart-lung machine that is convenient for replacing an ECMO membrane lung, which is provided with a centrifugal pump head connected to a controller, a femoral vein tube, a femoral artery tube, a connecting tube, an intermediate tube and an ECMO membrane lung; it also includes a first valve, a third valve and a transverse tube, the first valve and the third valve are both three-way valves, the upper and lower outlets of the first valve are connected to the intermediate tube, the upper and lower outlets of the third valve are connected between the femoral artery tube and the connecting tube, and the transverse tube is connected between the side outlet of the first valve and the side outlet of the third valve.

[0010] The beneficial technical effects of the present invention are: First, by adjusting the two three-way valves, disconnecting the passage between the femoral artery tube and the connecting tube, disconnecting the passage of the intermediate tube, and connecting the transverse tube to the side outlet of the first valve and the side outlet of the third valve, a new ECMO membrane lung can be quickly replaced without stopping the machine. Second, the above operation can avoid replacing the entire set of pipelines, reducing the patient's medical expenses. Third, the withdrawal tube is connected between the lower port of the fourth valve and the left port of the second valve. After replacing the new ECMO membrane lung, the centrifugal pump head can return the remaining blood in the connecting tube to the patient through the fourth valve, the withdrawal tube and the second valve to prevent iatrogenic blood loss. Fourth, the heat exchanger in the ECMO device can fully heat or cool the blood to adjust the blood temperature, which can avoid complications caused by low temperature, and ensure that the blood temperature is not too high, thereby avoiding hemolysis and bubble formation. The technical solution of the present invention can make the ECMO membrane lung quickly replaced, easy to operate, avoid iatrogenic blood loss, save patient medical expenses, and has the characteristics of ensuring the safety of the patient's treatment throughout the process and improving the efficiency of medical care operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention.

[0012] The components in the figure are numbered as follows: controller 1, control circuit 2, first valve 3, centrifugal pump head 4, second valve 5, fifth valve 6, femoral vein tube 7, femoral artery tube 8, third valve 9, transverse tube 10, connecting tube 11, fourth valve 12, intermediate tube 13, water pipe 14, heat exchanger 15, ECMO membrane lung 16, and withdrawal tube 17. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] like Figure 1As shown, the present invention provides an artificial heart-lung machine that is convenient for replacing ECMO membrane lungs, in which the fifth valve 6, the second valve 5 and the fourth valve 12 are all stop valves. The first valve 3 and the third valve 9 are both three-way valves, and the transverse tube 10 is connected between the side outlet of the first valve 3 and the side outlet of the third valve 9. As a set of safety mechanisms, when a sudden large-scale blockage of the artificial heart-lung machine endangers the patient's life, medical staff can use this safety mechanism to bypass the blocked ECMO membrane lung 16 to continue to maintain the patient's blood circulation, quickly replace the new ECMO membrane lung 16 to continuously treat the patient, and avoid the emergency from causing irreparable damage to the patient's life safety. During the operation and treatment process, if the ECMO membrane lung 16 is embolic and needs to be replaced, the safety mechanism can be activated. This mechanism can prevent medical workers from misoperating during daily operation, and this safety mechanism can only be activated when the ECMO membrane lung 16 needs to be replaced. The method of use is as follows: First, open the fifth valve 6, close the second valve 5 and the fourth valve 12, and start the machine normally. The patient's venous blood enters the patient's arterial blood vessels through the fifth valve 6, the femoral vein tube 7, the centrifugal pump head 4, the first valve 3, the intermediate tube 13, the ECMO membrane lung 16, the connecting tube 11, the third valve 9 and the femoral artery tube 8. Second, by adjusting the first valve 3, the transverse tube 10 and the third valve 9 to be connected, the blood bypasses the ECMO membrane lung 16 and continues to operate. During this time, the doctor can quickly remove the original ECMO membrane lung 16, install a new ECMO membrane lung 16, and then adjust the two three-way valves, disconnect the transverse tube 10 passage, connect the intermediate tube 13 up and down, connect the femoral artery tube 8 and the connecting tube 11, and the newly replaced ECMO membrane lung 16 can operate the blood path normally. The whole process is quick and simple, and it will not induce the problem of blood circulation stopping and being blocked. Third, in order to recover the remaining blood in the connecting tube 11, the fifth valve 6 can be quickly closed, the second valve 5 and the fourth valve 12 can be opened, the centrifugal pump head 4 can be started, and the remaining blood in the connecting tube 11 can be recovered to the maximum extent. Then, the second valve 5 and the fourth valve 12 can be quickly closed, and the fifth valve 6 can be opened. The remaining blood in the connecting tube 11 enters the centrifugal pump head 4 and enters the patient's body through the normal circulation of the fifth valve 6, which not only protects the patient to the greatest extent, but also avoids iatrogenic blood loss in the patient. Fourth, the heat exchanger 15 is connected to the internal circulation pipeline of the ECMO membrane lung 16 through two water pipes 14. The role of the heat exchanger 15 in the ECMO membrane lung 16 is to provide temperature regulation for the extracorporeal circulating blood. The heat exchanger 15 regulates the temperature of the blood by heating or cooling the liquid flowing through it, thereby maintaining the normal body temperature of the patient.

[0015] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. An artificial heart-lung machine for convenient replacement of ECMO membrane lung, comprising a centrifugal pump head (4) connected to a controller (1), a femoral vein tube (7), a femoral artery tube (8), a connecting tube (11), an intermediate tube (13) and an ECMO membrane lung (16); characterized in that: It also comprises a first valve (3), a third valve (9) and a transverse tube (10); the first valve (3) and the third valve (9) are both three-way valves; the upper and lower outlets of the first valve (3) are connected to the middle tube (13); the upper and lower outlets of the third valve (9) are connected between the femoral artery tube (8) and the connecting tube (11); and the transverse tube (10) is connected between the side outlet of the first valve (3) and the side outlet of the third valve (9).

2. An artificial heart-lung machine that facilitates replacement of ECMO membrane lungs according to claim 1, characterized in that: It also includes a fifth valve (6), a second valve (5), a fourth valve (12) and a return pipe (17); the fifth valve (6) is installed on the femoral vein pipe (7), the right port of the second valve (5) is installed on the femoral vein pipe (7) between the fifth valve (6) and the centrifugal pump head (4) through a tee, the left port of the second valve (5) is connected to the lower port of the fourth valve (12) through the return pipe (17), and the upper port of the fourth valve (12) is installed on the connecting pipe (11) between the ECMO membrane lung (16) and the third valve (9) through a tee.

3. An artificial heart-lung machine that facilitates replacement of ECMO membrane lungs according to claim 2, characterized in that: It also includes a heat exchanger (15) and a water pipe (14) thereof, wherein the heat exchanger (15) is connected to the inside of the ECMO membrane lung (16) via two water pipes (14).

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