Method for controlling tightness of left and right heart during extracorporeal circulation

Abstract

The application discloses a method for controlling the tightness of left and right heart pressure in cardiopulmonary bypass, which comprises the following steps: installing a peristaltic pump at the left and right heart inlets of a cardiopulmonary bypass device in an isolated environment; connecting a liquid inlet pump to the liquid inlet of the peristaltic pump and connecting a liquid outlet pump to the liquid outlet of the peristaltic pump; finally, setting a first pressure measuring structure and a second pressure measuring structure on the sides of the liquid inlet pump and the liquid outlet pump, respectively, away from the peristaltic pump, and adjusting the pressure of the liquid inlet pump and the liquid outlet pump to be-20mmHg. The negative pressure of the liquid inlet pump is adjusted through the first pressure measuring structure, and the negative pressure of the liquid outlet pump is adjusted through the second pressure measuring structure, so as to achieve the purpose of quantitative adjustment. The adjustment method is accurate, fast and reliable, and can effectively avoid the risk of reduction of pump blood volume, insufficient blood supply, direct interruption of blood circulation, damage of blood components, hemolysis, gas embolism and other risks caused by the "suction collapse" or "suction failure" of the pipe connected with the peristaltic pump.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a method for controlling the pressure of the left and right hearts during extracorporeal circulation. Background Technology

[0002] In cardiopulmonary bypass surgery, the suction of the left and right ventricles is a significant factor affecting the incidence of hemoglobinuria. Therefore, adjusting the compression of the left and right ventricles is crucial. Currently, in practice, the inlets of the left and right ventricles are generally clamped, and then the pump is rotated to "listen for a popping sound." Various methods exist, but the above methods are only a "coarse adjustment" because there is no fluid in the left and right ventricles before the machine is turned on, making fine adjustment impossible. This is also the most difficult part for novice perfusionists to master.

[0003] Therefore, based on the above, an in vitro experiment was designed: a 1 / 4LL connector was installed at the left and right ventricular inlet pump, connected to a sterile saline soft bag. Another 1 / 4LL connector was installed at the outlet pump, connected to the membrane lung via a double-positive tube. The distal ends of the saline inlet and the double-positive tube at the outlet pump were clamped with clamps. The roller pump was then gently rotated until the sterile saline in the soft bag flowed into the double-positive tube, filling it completely. The double-positive tube was then removed from the membrane lung, raised, and stretched to a certain height. At this point, the compression of the left and right ventricular sides could be precisely adjusted, greatly improving the accuracy of left and right ventricular compression during extracorporeal circulation. After adjustment, the roller pump was reversed to return the sterile saline from the left and right ventricular tubes to the sterile saline soft bag. Finally, the soft bag containing the returned sterile saline was discarded. This method can be considered a "gold standard" for adjusting left and right ventricular compression. However, after adjusting the left ventricle in this way, the pressure inside the tubing connected to the peristaltic pump is unstable during the operation, which may cause the pump tubing to "collapse" or "not be able to suck" during the operation. This may lead to a reduction in the amount of blood delivered by the pump, resulting in insufficient blood supply or direct interruption of blood circulation. It may also lead to risks such as damage to blood components, hemolysis, and gas embolism, making the adjustment unreliable. Summary of the Invention

[0004] Therefore, the present invention aims to solve the problem in the prior art that it is difficult to ensure the accuracy of the left and right ventricular compression while ensuring the stability and reliability of the adjustment, thereby providing a method for controlling the left and right ventricular compression during cardiopulmonary bypass.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A method for controlling left and right ventricular compression during cardiopulmonary bypass surgery includes the following steps:

[0007] S1: In an in vitro environment, peristaltic pumps are installed at the left and right ventricular inlets of the extracorporeal circulation device;

[0008] S2: Connect the inlet pump to the inlet of the peristaltic pump and the outlet pump to the outlet of the peristaltic pump.

[0009] S3: A first pressure measuring structure is installed on the side of the inlet pump away from the peristaltic pump to adjust the pressure of the inlet pump to -20 mmHg;

[0010] S4: A second pressure measuring structure is installed on the side of the outlet pump away from the peristaltic pump to adjust the pressure of the outlet pump to -20 mmHg.

[0011] Furthermore, in step S1, it is necessary to perform the procedure when both the inlet and outlet pipes are empty (without water) or when both the inlet and outlet pipes are full of liquid.

[0012] Furthermore, in steps S3 and S4, both the inlet pump and the outlet pump are 6-inch single-head pumps.

[0013] Furthermore, in steps S3 and S4, both the inlet pump and the outlet pump are 3-inch dual-head pumps.

[0014] Furthermore, in steps S3 and S4, the pressure of both the inlet pump and the outlet pump needs to be adjusted to -10 mmHg.

[0015] Furthermore, it also includes step S5: installing a pressure regulating structure on both the first pressure measuring structure and the second pressure measuring structure, and reducing or increasing the pressure by means of the pressure regulating structure when the pressure value of the first pressure measuring structure and the second pressure measuring structure does not reach the required pressure value.

[0016] Furthermore, in step S2, the inlet pump is connected to the peristaltic pump via an inlet pipe, and the outlet pump is connected to the peristaltic pump via an outlet pipe.

[0017] Furthermore, the inlet pump is connected to the middle of the inlet pipe, and a water bucket is connected to the end of the inlet pipe away from the peristaltic pump.

[0018] Furthermore, the liquid discharge pump is connected to the middle of the liquid discharge pipe, and the end of the liquid discharge pipe away from the peristaltic pump is connected to the water bucket.

[0019] Furthermore, the bucket is suitable for holding ordinary water.

[0020] The technical solution of this invention has the following advantages:

[0021] 1. The method for controlling left and right ventricular pressure during extracorporeal circulation provided by this invention adjusts the negative pressure of the inlet pump through a first pressure measuring structure and the negative pressure of the outlet pump through a second pressure measuring structure, thereby quantifying the adjustment method and making the adjustment process of controlling left and right ventricular pressure before extracorporeal circulation visible. At the same time, it maintains stable pressure of the outlet and inlet pumps, which can ensure the accuracy of left and right ventricular pressure during extracorporeal circulation while ensuring the stability of the adjustment. The adjustment method is accurate, fast and reliable, and can effectively avoid the situation where the tube connected to the peristaltic pump "collapses" or "cannot be sucked" during the operation, which may lead to a reduction in the amount of blood delivered by the pump, insufficient blood supply or direct interruption of blood circulation, resulting in risks such as damage to blood components, hemolysis, and gas embolism.

[0022] 2. The method for controlling left and right ventricular pressure during extracorporeal circulation provided by this invention includes pressure regulating structures installed on both the first and second pressure measuring structures. When the pressure values ​​of the first and second pressure measuring structures do not reach the required pressure values, the pressure is reduced or increased through the pressure regulating structures. This configuration maintains the pressure stability of the inlet pump connected to the first pressure measuring structure and the outlet pump connected to the second pressure measuring structure. It also allows for pressure adjustment when the pressure in the pump tubing connecting the inlet and outlet pumps changes due to external impacts or temperature variations during the procedure, preventing fluctuations in pump-delivered blood volume or insufficient blood supply during surgery. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a structure for adjusting the pressure of the left and right hearts during extracorporeal circulation under full water conditions, as provided in an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached drawings: 1. Extracorporeal circulation device; 2. Peristaltic pump; 3. Inlet pump; 4. Outlet pump; 5. Inlet pipe; 6. Outlet pipe; 7. First connecting pipe; 8. Second connecting pipe; 9. First pressure measuring structure; 10. Second pressure measuring structure; 11. Water tank. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Furthermore, 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.

[0030] like Figure 1 The method shown includes the following steps for controlling left and right ventricular compression during cardiopulmonary bypass:

[0031] S1: In an in vitro environment, peristaltic pumps 2 are installed at the left and right heart inlets of the extracorporeal circulation device 1;

[0032] S2: Connect the inlet pump 3 to the inlet of the peristaltic pump 2, and connect the outlet pump 4 to the outlet of the peristaltic pump 2.

[0033] S3: A first pressure measuring structure 9 is provided on the side of the inlet pump 3 away from the peristaltic pump 2 to adjust the pressure of the inlet pump 3 to -20mmHg;

[0034] S4: A second pressure measuring structure 10 is provided on the side of the discharge pump 4 away from the peristaltic pump 2 to adjust the pressure of the discharge pump 4 to -20 mmHg.

[0035] This method of controlling the pressure of the left and right hearts during extracorporeal circulation involves adjusting the negative pressure of the inlet pump 3 through the first pressure measuring structure 9 and adjusting the negative pressure of the outlet pump 4 through the second pressure measuring structure 10. This achieves the purpose of quantifying the adjustment method, making the process of controlling the pressure of the left and right hearts before extracorporeal circulation visible. At the same time, it maintains stable pressure of the outlet pump 4 and the inlet pump 3. This ensures the accuracy of the pressure of the left and right hearts during extracorporeal circulation while ensuring the stability of the adjustment. The adjustment method is accurate, fast and reliable. It can effectively avoid the situation where the tube connected to the peristaltic pump 2 "collapses" or "cannot be sucked" during the operation, which may lead to a reduction in the amount of blood delivered by the pump, insufficient blood supply or direct interruption of blood circulation, resulting in risks such as damage to blood components, hemolysis, and gas embolism.

[0036] In this embodiment, step S5 is also included: a pressure regulating structure is installed on both the first pressure measuring structure 9 and the second pressure measuring structure 10. When the pressure values ​​of the first pressure measuring structure 9 and the second pressure measuring structure 10 do not reach the required pressure values, the pressure is reduced or increased through the pressure regulating structure. This configuration maintains the pressure stability of the inlet pump 3 connected to the first pressure measuring structure 9 and the outlet pump 4 connected to the second pressure measuring structure 10. When the pressure inside the pump tubes connected to the inlet pump 3 and the outlet pump 4 changes due to external impact or temperature fluctuations during surgery, the pressure regulating structure can adjust the pressure, preventing fluctuations in the amount of blood delivered by the pump or insufficient blood supply during surgery.

[0037] In step S1, the operation needs to be performed at the maximum flow rate of the extracorporeal circulation device 1.

[0038] In step S2, the inlet pump 3 is connected to the peristaltic pump 2 via the inlet pipe 5, and the outlet pump 4 is connected to the peristaltic pump 2 via the outlet pipe 6. The inlet pump 3 is connected to the middle of the inlet pipe 5, and the end of the inlet pipe 5 away from the peristaltic pump 2 is connected to a water tank 11. The outlet pump 4 is connected to the middle of the outlet pipe 6, and the end of the outlet pipe 6 away from the peristaltic pump 2 is connected to the water tank 11. The water tank 11 contains ordinary water.

[0039] Specifically, the inlet pump 3 is connected to a first connecting pipe 7, and the first pressure measuring structure 9 is connected to the inlet pump 3 through the first connecting pipe 7; the outlet pump 4 is connected to a second connecting pipe 8, and the second pressure measuring structure 10 is connected to the outlet pump 4 through the second connecting pipe 8.

[0040] In step S1, it is necessary to perform the procedure when both the inlet pipe 5 and the outlet pipe 6 are empty (without water) or when both the inlet pipe 5 and the outlet pipe 6 are full of liquid.

[0041] In steps S3 and S4, both the inlet pump 3 and the outlet pump 4 are 6-inch single-head pumps. In an alternative embodiment, both the inlet pump 3 and the outlet pump 4 are 3-inch dual-head pumps, and the pressure of both the inlet pump 3 and the outlet pump 4 needs to be adjusted to -10 mmHg.

[0042] In summary, this method of controlling left and right ventricular pressure during cardiopulmonary bypass surgery achieves quantitative control by adjusting the negative pressure of the inlet pump 3 through the first pressure measuring structure 9 and the negative pressure of the outlet pump 4 through the second pressure measuring structure 10. This makes the process of controlling left and right ventricular pressure before cardiopulmonary bypass surgery visible, while maintaining stable pressures in both the outlet pump 4 and the inlet pump 3. This ensures both the accuracy and stability of the adjustment of left and right ventricular pressure during cardiopulmonary bypass. The adjustment method is accurate, quick, and highly reliable, effectively preventing situations where the tube connected to the peristaltic pump 2 "collapses" or "cannot be sucked" during surgery, which could lead to a reduction in the amount of blood delivered by the pump, insufficient blood supply, or direct interruption of blood circulation, resulting in risks such as damage to blood components, hemolysis, and gas embolism.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for controlling left and right ventricular compression during cardiopulmonary bypass surgery, characterized in that, Includes the following steps: S1: In an in vitro environment, a peristaltic pump (2) is installed at the left and right heart inlets of the extracorporeal circulation device (1); S2: Connect the inlet pump (3) to the inlet of the peristaltic pump (2) through the inlet pipe (5), and connect the outlet pump (4) to the outlet of the peristaltic pump (2) through the outlet pipe (6); S3: Connect the first pressure measuring structure (9) to the side of the inlet pump (3) away from the peristaltic pump (2) through the first connecting pipe (7), install a pressure regulating structure on the first pressure measuring structure (9), and adjust the pressure of the inlet pump (3) to -20mmHg through the pressure regulating structure; S4: A second pressure measuring structure (10) is connected to the side of the discharge pump (4) away from the peristaltic pump (2) via a second connecting pipe (8). A pressure regulating structure is installed on the second pressure measuring structure (10). The pressure of the discharge pump (4) is adjusted to -20 mmHg through the pressure regulating structure. S5: When the pressure values ​​of the first pressure measuring structure (9) and the second pressure measuring structure (10) do not reach the required pressure value, the pressure is reduced or increased by the pressure regulating structure.

2. The method for controlling left and right ventricular compression during cardiopulmonary bypass surgery according to claim 1, characterized in that, In step S1, it is necessary to perform the procedure when both the inlet pipe (5) and the outlet pipe (6) are empty pipes without water or when both the inlet pipe (5) and the outlet pipe (6) are full of liquid.

3. The method for controlling left and right ventricular compression during cardiopulmonary bypass surgery according to claim 1, characterized in that, In steps S3 and S4, both the inlet pump (3) and the outlet pump (4) are 6-inch single-head pumps.

4. The method for controlling left and right ventricular compression during cardiopulmonary bypass surgery according to claim 1, characterized in that, In steps S3 and S4, both the inlet pump (3) and the outlet pump (4) are 3-inch dual-head pumps.

5. The method for controlling left and right ventricular compression during cardiopulmonary bypass surgery according to claim 4, characterized in that, In steps S3 and S4, the pressure of both the inlet pump (3) and the outlet pump (4) needs to be adjusted to -10 mmHg.

6. The method for controlling left and right ventricular compression during cardiopulmonary bypass surgery according to claim 1, characterized in that, In step S2, the inlet pump (3) is connected to the peristaltic pump (2) through the inlet pipe (5), and the outlet pump (4) is connected to the peristaltic pump (2) through the outlet pipe (6).

7. The method for controlling left and right ventricular compression during cardiopulmonary bypass surgery according to claim 6, characterized in that, The inlet pump (3) is connected to the middle of the inlet pipe (5), and a water bucket (11) is connected to the end of the inlet pipe (5) away from the peristaltic pump (2).

8. The method for controlling left and right ventricular compression during cardiopulmonary bypass surgery according to claim 7, characterized in that, The liquid discharge pump (4) is connected to the middle of the liquid discharge pipe (6), and the end of the liquid discharge pipe (6) away from the peristaltic pump (2) is connected to the water bucket (11).

9. The method for controlling left and right ventricular compression during cardiopulmonary bypass surgery according to claim 8, characterized in that, The bucket (11) is suitable for holding ordinary water.

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