Additional device for left heart flow turning

Abstract

The additional device comprises an extracorporeal circulation water tank, a temperature changing structure suitable for adjusting the temperature of liquid in the extracorporeal circulation water tank is installed in the extracorporeal circulation water tank, a blood channel located in the liquid in the extracorporeal circulation water tank is arranged in the extracorporeal circulation water tank, and a blood inlet is formed in the top of the extracorporeal circulation water tank; a blood outlet is formed in the bottom of the extracorporeal circulation water tank. Blood flowing out of the human body is introduced into the blood channel of the extracorporeal circulation water tank from the blood inlet through the centrifugal pump, liquid in the extracorporeal circulation water tank is adjusted to the proper temperature through the temperature changing structure, temperature adjustment and heat preservation can be conducted on the blood channel, and therefore the blood flowing through the extracorporeal circulation water tank is reheated, and the temperature of the blood is kept constant; the rewarmed blood flows out of the blood outlet and then enters the human body, the arrhythmia or ventricular fibrillation risk of an operator caused by cooling when the blood flows out of the body is avoided, rewarming through a membrane lung is not needed, and the success rate of the operation can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an additional device for left heart bypass. Background Art

[0002] In thoracic and abdominal aortic aneurysm repair surgeries, the "left heart bypass" technology is increasingly used, which is to drain arterial blood from the left atrium and pump it into the femoral artery through a centrifugal pump. This avoids many complications of traditional surgery such as "deep hypothermic circulatory arrest" or blocking both ends of the "tumor" at room temperature, which often result in very serious consequences such as paraplegia or even death.

[0003] However, there is a problem with left ventricular bypass: the blood will "naturally cool down" when flowing outside the body, and the body temperature will be lower when the operation time is long, which may cause arrhythmia or even ventricular fibrillation. In addition, if the room temperature is too high, it will not meet the requirements of left ventricular bypass. In left ventricular bypass surgery, the room temperature is generally maintained at 34°C, and the blood temperature needs to be maintained at 37°C at the end of the operation. Most of the existing technologies use membrane lung rewarming to solve this problem, but this method has many disadvantages. First, the cost is high. Second, it is necessary to bear the risk of failure of the membrane lung temperature change system and the oxygenation system. Left ventricular bypass does not require "oxygenation", so this risk of failure seems even less valuable. Third, and most importantly, when using membrane lungs, the dosage of heparin needs to be increased, and bleeding in the operation itself is a major problem. Large doses of heparin will only "make the situation worse" in left ventricular bypass surgery, and sometimes simple bleeding will cause the operation to fail. Summary of the invention

[0004] Therefore, the technical problem of the present invention is to solve the defects of the prior art in which the blood temperature flowing through the body during left heart bypass surgery is low and the risk of rewarming using a membrane lung is high, thereby providing an additional device for left heart bypass.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] An additional device for left heart bypass comprises an extracorporeal circulation water tank, wherein a temperature-changing structure suitable for adjusting the temperature of the liquid in the extracorporeal circulation water tank is installed in the extracorporeal circulation water tank, wherein a blood channel located in the liquid of the extracorporeal circulation water tank is arranged in the extracorporeal circulation water tank, wherein a blood inlet and a blood outlet are respectively arranged on the extracorporeal circulation water tank, wherein the blood inlet is arranged at the top of the extracorporeal circulation water tank, and the blood outlet is arranged at the bottom of the extracorporeal circulation water tank; blood drained from the left atrium of a human body is suitable for entering the interior of the extracorporeal circulation water tank from the blood inlet, wherein a centrifugal pump located between the human body and the blood inlet is arranged on the blood inlet; and after the human body's blood flows into the interior of the extracorporeal circulation water tank, it flows out from the blood outlet.

[0007] Furthermore, a filter is provided at the top of the extracorporeal circulation water tank, and the filter is provided below the blood inlet.

[0008] Furthermore, the pore size of the filter mesh is 70-90um.

[0009] Furthermore, a water inlet and a water outlet are respectively arranged on the side walls of the extracorporeal circulation water tank, and the position of the water inlet is lower than the position of the water outlet.

[0010] Furthermore, a pressure measuring structure is connected to the side wall of the extracorporeal circulation water tank via an air pressure tube.

[0011] Furthermore, one end of the air pressure tube away from the extracorporeal circulation water tank is connected to a three-way cock, the pressure measuring structure is installed on the three-way cock, and the three-way cock is also provided with an exhaust valve.

[0012] Furthermore, a polytetrafluoroethylene film is arranged in one end of the exhaust valve away from the three-way stopcock.

[0013] Furthermore, a disposable temperature measuring component is provided on the extracorporeal circulation water tank.

[0014] Furthermore, the temperature-changing structure is a temperature-changing wire, and a plurality of the temperature-changing wires are evenly and densely arranged on the inner wall of the extracorporeal circulation water tank.

[0015] Furthermore, polyethylene terephthalate is arranged in the temperature variable wire.

[0016] The technical solution of the present invention has the following advantages:

[0017] 1. The additional device for left heart bypass provided by the present invention introduces the blood flowing out of the human body from the blood inlet into the blood channel of the extracorporeal circulation water tank through a centrifugal pump, and adjusts the liquid in the extracorporeal circulation water tank to a suitable temperature through a temperature-changing structure, thereby regulating and insulating the blood channel in the liquid in the extracorporeal circulation water tank, thereby rewarming the temperature of the passing blood and keeping the blood at a constant temperature. The rewarmed blood flows out from the blood outlet and then enters the human body, avoiding the risk of arrhythmia or ventricular fibrillation caused by the operator due to cooling of the blood when flowing outside the body, and there is no need to use a membrane lung for rewarming, thus avoiding the risks caused by using a membrane lung, and can effectively improve the success rate of the operation.

[0018] 2. The additional device for left heart bypass provided by the present invention has a filter screen arranged on the top of the extracorporeal circulation water tank, and the filter screen is arranged below the blood inlet. In this way, microemboli in the blood can be filtered out by the filter screen before the blood enters the blood channel in the extracorporeal circulation water tank, so as to prevent the microemboli in the blood from re-entering the human body and blocking the blood flow.

[0019] 3. The additional device for left ventricular bypass provided by the present invention has a filter mesh aperture of 70-90um. This arrangement can avoid the filter mesh aperture being too small to form a large resistance, thereby preventing blood from passing through; and at the same time avoid the filter mesh aperture being too large to cause the filter mesh shell to fail to achieve the filtering effect, thereby causing microemboli in the blood to re-enter the human body and block blood flow.

[0020] 4. The additional device for left heart bypass provided by the present invention has a water inlet and a water outlet respectively arranged on the side wall of the extracorporeal circulation water tank, and the position of the water inlet is lower than the position of the water outlet. Such arrangement can make the gas in the pipeline containing liquid in the extracorporeal circulation water tank float up, avoid air blockage, and keep the pipeline full at all times, thereby ensuring the stability of the pipeline flow, and then ensuring the uniformity of the liquid after heating, thereby ensuring the uniformity of the blood flowing through when rewarming.

[0021] 5. The additional device for left heart bypass provided by the present invention has a pressure measuring structure on the side wall of the extracorporeal circulation water tank connected to the air pressure tube. With this arrangement, the pressure of the pipeline can be measured when the blood passes through the extracorporeal circulation water tank, so as to observe whether the blood flow is at an appropriate pressure when passing through.

[0022] 6. The additional device for left heart bypass provided by the present invention has a three-way cock connected to one end of the air pressure tube away from the extracorporeal circulation water tank, a pressure measuring structure is installed on the three-way cock, and an exhaust valve is also provided on the three-way cock. If it is set as expected, when the pressure measuring structure measures that the blood pressure flowing through the extracorporeal circulation water tank is too high, the exhaust valve can be adjusted to keep the pressure stable.

[0023] 7. In the additional device for left ventricular circumference provided by the present invention, a polytetrafluoroethylene membrane is arranged in one end of the exhaust valve away from the three-way cock. In this way, the polytetrafluoroethylene membrane can prevent the exhaust valve from being blocked and contaminated, thereby ensuring the long-term stable operation and safety of the exhaust valve system.

[0024] 8. The additional device for left heart bypass provided by the present invention has a disposable temperature measuring element on the extracorporeal circulation water tank. With such an arrangement, the temperature measuring element can be used to observe at any time whether the temperature inside the extracorporeal circulation water tank meets the required temperature; at the same time, the temperature measuring element is a disposable setting, which saves the complicated procedure of repeated disinfection and also avoids the risk of cross infection between patients.

[0025] 9. The additional device for left ventricular bypass provided by the present invention has a temperature-changing structure of a temperature-changing wire, and a plurality of temperature-changing wires are evenly and densely arranged on the inner wall of the extracorporeal circulation water tank. With such a configuration, the temperature-changing wire is used as the temperature-changing structure, which can improve the heating efficiency and safety. At the same time, compared with the method of heating with a whole temperature-changing plate, the temperature-changing wire can be used to accurately control the temperature, and the temperature-changing speed is faster, which avoids unnecessary energy consumption, especially in the heat preservation stage, which can significantly reduce energy waste.

[0026] 10. The auxiliary device for left ventricular bypass provided by the present invention has polyethylene terephthalate arranged in the temperature-variable wire, which can reduce gas and water vapor, can be used for a long time in a temperature range not higher than 70°C, and has little effect on its mechanical properties at high and low temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the structure of an additional device for left ventricular circumduction provided in an embodiment of the present invention.

[0029] Explanation of the accompanying reference numerals: 1. Extracorporeal circulation water tank; 2. Temperature variable structure; 3. Blood inlet; 4. Blood outlet; 5. Centrifugal pump; 6. Filter; 7. Water inlet; 8. Water outlet; 9. Air pressure tube; 10. Pressure measuring structure; 11. Three-way stopcock; 12. Exhaust valve; 13. Polytetrafluoroethylene membrane; 14. Disposable temperature measuring component. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figure 1 An additional device for left heart bypass shown in the figure comprises an extracorporeal circulation water tank 1, in which a temperature-changing structure 2 suitable for adjusting the temperature of the liquid in the extracorporeal circulation water tank 1 is installed, a blood channel located in the liquid of the extracorporeal circulation water tank 1 is arranged in the extracorporeal circulation water tank 1, a blood inlet 3 and a blood outlet 4 are arranged on the extracorporeal circulation water tank 1, respectively, the blood inlet 3 is arranged at the top of the extracorporeal circulation water tank 1, and the blood outlet 4 is arranged at the bottom of the extracorporeal circulation water tank 1; the blood drained from the left atrium of the human body is suitable for entering the inside of the extracorporeal circulation water tank 1 from the blood inlet 3, and a centrifugal pump 5 located between the human body and the blood inlet 3 is arranged on the blood inlet 3; the human blood flows into the inside of the extracorporeal circulation water tank 1 and then flows out from the blood outlet 4.

[0035] This additional device for left heart bypass introduces the blood flowing out of the human body from the blood inlet 3 into the blood channel of the extracorporeal circulation water tank 1 through the centrifugal pump 5, and adjusts the liquid in the extracorporeal circulation water tank 1 to a suitable temperature through the temperature variable structure 2, thereby regulating and insulating the blood channel in the liquid in the extracorporeal circulation water tank 1, thereby rewarming the temperature of the passing blood and keeping the blood at a constant temperature. The rewarmed blood flows out from the blood outlet 4 and then enters the human body, avoiding the risk of arrhythmia or ventricular fibrillation caused by the cooling of the blood when flowing outside the body. There is no need to use a membrane lung for rewarming, avoiding the risks of using a membrane lung, and effectively improving the success rate of the operation.

[0036] In this embodiment, a water inlet 7 and a water outlet 8 are respectively arranged on the side wall of the extracorporeal circulation water tank 1, and the position of the water inlet 7 is lower than the position of the water outlet 8. Such arrangement can make the gas in the pipeline containing the liquid in the extracorporeal circulation water tank 1 float up, avoid the situation of air blockage, and keep the pipeline full at all times, thereby ensuring the stability of the pipeline flow, and then ensuring the uniformity of the liquid after heating, thereby ensuring the uniformity of the blood flowing through when rewarming.

[0037] In this embodiment, a filter screen 6 is provided at the top of the extracorporeal circulation water tank 1, and the filter screen 6 is provided below the blood inlet 3. With such a configuration, the microemboli in the blood can be filtered out by the filter screen 6 before the blood enters the blood channel in the extracorporeal circulation water tank 1, so as to prevent the microemboli in the blood from re-entering the human body and blocking the blood flow. Specifically, the aperture of the mesh of the filter screen 6 is 80um. With such a configuration, it is possible to prevent the aperture of the mesh of the filter screen 6 from being too small to form a large resistance, thereby preventing the blood from passing through; at the same time, it is possible to prevent the aperture of the mesh of the filter screen 6 from being too large to cause the mesh shell of the filter screen 6 to fail and fail to achieve the filtering effect, thereby causing the microemboli in the blood to re-enter the human body and block the blood flow.

[0038] In this embodiment, a pressure measuring structure 10 is connected to the side wall of the extracorporeal circulation water tank 1 through an air pressure tube 9. With such a configuration, the pressure of the pipeline can be measured when the blood passes through the extracorporeal circulation water tank 1, so as to observe whether the blood flow is in a suitable pressure when passing through. Specifically, a three-way stopcock 11 is connected to the end of the air pressure tube 9 away from the extracorporeal circulation water tank 1, and the pressure measuring structure 10 is installed on the three-way stopcock 11, and an exhaust valve 12 is also provided on the three-way stopcock 11. As expected, when the pressure measuring structure 10 measures that the pressure of the blood flowing through the extracorporeal circulation water tank 1 is too high, the pressure can be kept stable by adjusting the exhaust valve 12. Specifically, a polytetrafluoroethylene membrane 13 is provided in the end of the exhaust valve 12 away from the three-way stopcock 11. With such a configuration, the polytetrafluoroethylene membrane 13 can prevent the exhaust valve 12 from being blocked and contaminated, thereby ensuring the long-term stable operation and safety of the exhaust valve 12 system.

[0039] In this embodiment, a disposable temperature measuring element is provided on the extracorporeal circulation water tank 1. With such a configuration, the temperature measuring element can be used to observe at any time whether the temperature inside the extracorporeal circulation water tank 1 meets the required temperature; at the same time, the temperature measuring element is a disposable configuration, which saves the complicated procedure of repeated disinfection and also avoids the risk of cross infection between patients. Specifically, a temperature measuring hole is provided on the side wall of the extracorporeal circulation water tank 1, and the disposable temperature measuring element is inserted into the temperature measuring hole to measure the temperature inside the extracorporeal circulation water tank 1.

[0040] In this embodiment, the temperature-variable structure 2 is a temperature-variable wire, and a plurality of temperature-variable wires are evenly and densely arranged on the inner wall of the extracorporeal circulation water tank 1. With such a configuration, the use of a temperature-variable wire as the temperature-variable structure 2 can improve heating efficiency and safety. At the same time, compared with the method of heating with a whole temperature-variable plate, the use of a temperature-variable wire can accurately control the temperature, and the temperature change speed is faster, avoiding unnecessary energy consumption, especially in the heat preservation stage, which can significantly reduce energy waste. Specifically, polyethylene terephthalate is arranged in the temperature-variable wire. With such a configuration, gas and water vapor can be reduced, and it can be used for a long time within a temperature range not higher than 70°C, and the mechanical properties are affected very little at high and low temperatures.

[0041] In summary, this additional device for left heart bypass introduces the blood flowing out of the human body from the blood inlet 3 into the blood channel of the extracorporeal circulation water tank 1 through the centrifugal pump 5, and adjusts the liquid in the extracorporeal circulation water tank 1 to an appropriate temperature through the temperature variable structure 2, thereby regulating and insulating the blood channel in the liquid in the extracorporeal circulation water tank 1, thereby rewarming the passing blood and keeping the blood at a constant temperature. The rewarmed blood flows out from the blood outlet 4 and then enters the human body, avoiding the risk of surgical arrhythmia or ventricular fibrillation caused by cooling of the blood when flowing outside the body. There is no need to use a membrane lung for rewarming, avoiding the risks of using a membrane lung, and effectively improving the success rate of the operation.

[0042] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An additional device for left heart bypass, characterized in that: The invention comprises an extracorporeal circulation water tank (1), wherein a temperature-changing structure (2) suitable for adjusting the temperature of the liquid in the extracorporeal circulation water tank (1) is installed in the extracorporeal circulation water tank (1), wherein a blood channel located in the liquid of the extracorporeal circulation water tank (1) is arranged in the extracorporeal circulation water tank (1), wherein a blood inlet (3) and a blood outlet (4) are respectively arranged on the extracorporeal circulation water tank (1), wherein the blood inlet (3) is arranged at the top of the extracorporeal circulation water tank (1), and the blood outlet (4) is arranged at the bottom of the extracorporeal circulation water tank (1); blood drained from the left atrium of a human body is suitable for entering the interior of the extracorporeal circulation water tank (1) from the blood inlet (3), wherein a centrifugal pump (5) located between the human body and the blood inlet (3) is arranged on the blood inlet (3); and after the human body blood flows into the interior of the extracorporeal circulation water tank (1), it flows out from the blood outlet (4).

2. The additional device for left ventricular circumduction according to claim 1, characterized in that: A filter screen (6) is arranged at the top of the extracorporeal circulation water tank (1), and the filter screen (6) is arranged below the blood inlet (3).

3. The additional device for left ventricular circumduction according to claim 2, characterized in that: The pore size of the filter (6) is 70-90 um.

4. The additional device for left ventricular circumduction according to claim 1, characterized in that: A water inlet (7) and a water outlet (8) are respectively arranged on the side walls of the extracorporeal circulation water tank (1), and the position of the water inlet (7) is lower than that of the water outlet (8).

5. The additional device for left ventricular bypass according to claim 1, characterized in that: A pressure measuring structure (10) is connected to the side wall of the extracorporeal circulation water tank (1) via an air pressure tube (9).

6. The additional device for left ventricular circumduction according to claim 5, characterized in that: The end of the air pressure tube (9) away from the extracorporeal circulation water tank (1) is connected to a three-way cock (11), the pressure measuring structure (10) is installed on the three-way cock (11), and the three-way cock (11) is also provided with an exhaust valve (12).

7. The additional device for left ventricular circumduction according to claim 6, characterized in that: A polytetrafluoroethylene membrane (13) is arranged in one end of the exhaust valve (12) away from the three-way stopcock (11).

8. The additional device for left ventricular circulatory function according to claim 1, characterized in that: The extracorporeal circulation water tank (1) is provided with a disposable temperature measuring component.

9. The additional device for left ventricular bypass according to claim 1, characterized in that: The temperature-changing structure (2) is a temperature-changing wire, and a plurality of the temperature-changing wires are evenly and densely arranged on the inner wall of the extracorporeal circulation water tank (1).

10. The additional device for left ventricular circumduction according to claim 9, characterized in that: Polyethylene terephthalate is arranged in the temperature-variable wire.

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