Method for controlling left and right heart compression degree in extracorporeal circulation operation

Abstract

The invention discloses a method for controlling the compaction degree of a left heart and a right heart in an extracorporeal circulation operation, which comprises the following steps of: in an in-vitro environment, mounting a peristaltic pump at a left heart inlet and a right heart inlet of an extracorporeal circulation device; a liquid inlet of the peristaltic pump is connected with a liquid inlet pump, and a liquid outlet of the peristaltic pump is connected with a liquid outlet pump; and finally, a first pressure measuring structure and a second pressure measuring structure are arranged on the sides, away from the peristaltic pump, of the liquid inlet pump and the liquid outlet pump correspondingly, and the pressure of the liquid inlet pump and the pressure of the liquid outlet pump are adjusted to be-20 mmHg. 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 that the purpose of quantifying the adjusting mode is achieved, and the adjusting mode is accurate, rapid and high in reliability; the peristaltic pump can effectively avoid the occurrence of risks such as blood component damage, hemolysis, gas embolism and the like caused by reduction of the amount of blood conveyed by the pump, insufficient blood supply or direct interruption of blood circulation due to the condition that a pipe body connected with the peristaltic pump is shrunken or cannot be sucked during an operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a method for controlling the compression degree of the left and right hearts during extracorporeal circulation. Background Art

[0002] During extracorporeal circulation surgery, the suction of the left and right hearts is an important factor affecting the incidence of hemoglobinuria. Therefore, the adjustment of the compression degree of the left and right hearts is crucial. Currently, in practical operations, the inlets of the left and right hearts are generally clamped, and then the roller pump is rotated to "listen to the rattling sound". There are various methods like this, but the above methods are only a "coarse adjustment" because there is no liquid in the left and right hearts before the bypass starts, so fine adjustment cannot be achieved. This is also the most difficult part for novice perfusionists to master.

[0003] Therefore, on this basis, an in vitro experiment was designed: install a 1 / 4LL joint at the inlet of the left and right hearts into the pump, externally connect a soft bag of sterile saline, also install a 1 / 4LL joint at the outlet of the pump, connect it to the membrane lung with a double positive tube, clamp the distal ends of the saline installation and the distal ends of the double positive tube at the pump outlet with a pipe wrench, then gently rotate the roller pump until the sterile saline in the soft bag flows into the double positive tube and fills the double positive tube, then remove the double positive tube from the membrane lung, lift the double positive tube and stretch it to a certain height. At this time, the compression degree of the left and right hearts can be accurately adjusted, which greatly improves the accuracy of the compression degree of the left and right hearts during extracorporeal circulation. After the adjustment is completed, reverse the roller pump of the left and right hearts to recover the sterile saline in the left and right heart tubes into the sterile saline soft bag, and finally discard the soft bag with the returned sterile saline. This method can be regarded as a "gold standard" for adjusting the compression degree of the left and right hearts. However, after adjusting the left heart in this way, due to the unstable internal pressure in the pipeline connected to the peristaltic pump during the operation, the pump tube may still be "sucked flat" or "unable to be sucked" during the operation, which will further cause a reduction in the blood volume delivered by the pump, resulting in insufficient blood supply or directly interrupting blood circulation, and may also lead to risks such as blood component damage, hemolysis, and gas embolism, and the adjustment reliability is unstable. Summary of the Invention

[0004] Therefore, the present invention aims to solve the problem that the adjustment of the compression degree of the left and right hearts in the prior art is difficult to ensure both the accuracy of the compression degree of the left and right hearts during extracorporeal circulation and the stable and reliable adjustment, and thus provides a method for controlling the compression degree of the left and right hearts during extracorporeal circulation surgery.

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

[0006] A method for controlling the compression degree of the left and right hearts during extracorporeal circulation surgery, comprising the following steps:

[0007] S1: In an ex vivo environment, install a peristaltic pump at the inlets of the left and right hearts of the extracorporeal circulation device;

[0008] S2: Connect a liquid inlet pump to the liquid inlet of the peristaltic pump and connect a liquid outlet pump to the liquid outlet of the peristaltic pump;

[0009] S3: Install a first pressure measuring structure on the side of the liquid inlet pump away from the peristaltic pump and adjust the pressure of the liquid inlet pump to -20 mmHg;

[0010] S4: Install a second pressure measuring structure on the side of the liquid outlet pump away from the peristaltic pump and adjust the pressure of the liquid outlet pump to -20 mmHg.

[0011] Further, in step S1, it needs to be carried out when both the liquid inlet pipe and the liquid outlet pipe are in a state of empty pipes without water or both the liquid inlet pipe and the liquid outlet pipe are in a state of full pipes with liquid.

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

[0013] Further, in step S3 and step S4, both the liquid inlet pump and the liquid outlet pump are 3-inch double-head pumps.

[0014] Further, in step S3 and step S4, the pressures of both the liquid inlet pump and the liquid outlet pump need to be adjusted to -10 mmHg.

[0015] Further, it further includes step S5: Install pressure regulating structures on both the first pressure measuring structure and the second pressure measuring structure. When the pressure values of the first pressure measuring structure and the second pressure measuring structure do not reach the required pressure values, then carry out pressure reduction or pressure increase through the pressure regulating structures.

[0016] Further, in step S2, the liquid inlet pump is connected to the peristaltic pump through a liquid inlet pipe, and the liquid outlet pump is connected to the peristaltic pump through a liquid outlet pipe.

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

[0018] Further, the liquid outlet pump is connected to the middle part of the liquid outlet pipe, and one end of the liquid outlet pipe away from the peristaltic pump is connected to the water bucket.

[0019] Further, the water bucket is suitable for containing ordinary water.

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

[0021] 1. The method for controlling the compression degree of the left and right hearts during extracorporeal circulation provided by the present invention adjusts the negative pressure of the liquid inlet pump through the first pressure measuring structure and adjusts the negative pressure of the liquid outlet pump through the second pressure measuring structure, so as to achieve the purpose of quantifying the adjustment method, making the adjustment process of controlling the compression degree of the left and right hearts before extracorporeal circulation visual, and at the same time maintaining the stable pressure of the liquid outlet pump and the liquid inlet pump. It can ensure the accuracy of the compression degree of the left and right hearts during extracorporeal circulation while ensuring the stability of the adjustment. The adjustment method is accurate, fast and highly reliable, and can effectively avoid the situation that the tube body connected to the peristaltic pump appears "sucked flat" or "unable to suck" during the operation, which may cause a reduction in the blood volume transported by the pump, resulting in insufficient blood supply or directly interrupting blood circulation, leading to risks such as blood component destruction, hemolysis, and gas embolism.

[0022] 2. The method for controlling the compression degree of the left and right hearts during extracorporeal circulation provided by the present invention installs pressure regulating structures on both the first pressure measuring structure and the second pressure measuring structure. When the pressure values of the first pressure measuring structure and the second pressure measuring structure do not reach the required pressure values, pressure reduction or pressurization is performed through the pressure regulating structures. With such a setting, the pressure stability of the liquid inlet pump connected to the first pressure measuring structure and the liquid outlet pump connected to the second pressure measuring structure can be maintained. When the internal pressure of the pump tubes connected to the liquid inlet pump and the liquid outlet pump changes due to external force collision or temperature influence of the liquid during the operation, the pressure can be regulated through the pressure regulating structures, avoiding situations such as fluctuations in the blood volume transported by the pump or insufficient blood supply during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the method for controlling the compression degree of the left and right hearts by using a pressure measuring structure in a full water state during extracorporeal circulation provided by an embodiment of the present invention.

[0025] Description of the reference numerals: 1. Extracorporeal circulation device; 2. Peristaltic pump; 3. Liquid inlet pump; 4. Liquid outlet pump; 5. Liquid inlet pipe; 6. Liquid outlet pipe; 7. First connecting pipe; 8. Second connecting pipe; 9. First pressure measuring structure; 10. Second pressure measuring structure; 11. Water bucket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] In addition, the technical features involved in 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] As Figure 1 shown, a method for controlling the compression degree of the left and right hearts during extracorporeal circulation includes the following steps:

[0031] S1: In an ex vivo environment, install a peristaltic pump 2 at the left and right heart inlets of the extracorporeal circulation device 1;

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

[0033] S3: Set a first pressure measuring structure 9 on the side of the liquid inlet pump 3 away from the peristaltic pump 2, and adjust the pressure of the liquid inlet pump 3 to -20 mmHg;

[0034] S4: Set a second pressure measuring structure 10 on the side of the liquid outlet pump 4 away from the peristaltic pump 2, and adjust the pressure of the liquid outlet pump 4 to -20 mmHg.

[0035] This method for controlling the compression degrees of the left and right hearts during extracorporeal circulation adjusts the negative pressure of the liquid inlet pump 3 through the first pressure measurement structure 9 and adjusts the negative pressure of the liquid outlet pump 4 through the second pressure measurement structure 10, so as to achieve the purpose of quantifying the adjustment method, making the adjustment process of controlling the compression degrees of the left and right hearts before extracorporeal circulation visual, and at the same time maintaining the stable pressures of the liquid outlet pump 4 and the liquid inlet pump 3. It can ensure the accuracy of the compression degrees of the left and right hearts during extracorporeal circulation while ensuring the stability of the adjustment. The adjustment method is accurate, fast and highly reliable, and can effectively avoid the situation that the pipe body connected to the peristaltic pump 2 is "sucked flat" or "unable to be sucked" during the operation, which may cause a reduction in the blood volume transported by the pump, resulting in insufficient blood supply or directly interrupting blood circulation, leading to risks such as blood component destruction, hemolysis, and gas embolism.

[0036] In this embodiment, it further includes step S5: Pressure adjustment structures are installed on both the first pressure measurement structure 9 and the second pressure measurement structure 10. When the pressure values of the first pressure measurement structure 9 and the second pressure measurement structure 10 do not reach the required pressure values, pressure reduction or pressure increase is performed through the pressure adjustment structures. With such a setting, the pressure stability of the liquid inlet pump 3 connected to the first pressure measurement structure 9 and the liquid outlet pump 4 connected to the second pressure measurement structure 10 can be maintained. When the internal pressure of the pump pipes connected to the liquid inlet pump 3 and the liquid outlet pump 4 changes due to external force collision or the influence of the temperature of the liquid during the operation, pressure adjustment can be performed through the pressure adjustment structures to avoid situations such as fluctuations in the blood volume transported by the pump or insufficient blood supply during the operation.

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

[0038] In step S2, the liquid inlet pump 3 is connected to the peristaltic pump 2 through a liquid inlet pipe 5, and the liquid outlet pump 4 is connected to the peristaltic pump 2 through a liquid outlet pipe 6. The liquid inlet pump 3 is connected to the middle of the liquid inlet pipe 5, and the end of the liquid inlet pipe 5 far from the peristaltic pump 2 is connected to a water bucket 11. The liquid outlet pump 4 is connected to the middle of the liquid outlet pipe 6, and the end of the liquid outlet pipe 6 far from the peristaltic pump 2 is connected to the water bucket 11. Ordinary water is contained in the water bucket 11.

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

[0040] In step S1, it needs to be carried out when both the liquid inlet pipe 5 and the liquid outlet pipe 6 are in a state of empty pipes without water or both the liquid inlet pipe 5 and the liquid outlet pipe 6 are in a state of full pipes with liquid.

[0041] In the S3 step and the S4 step, both the liquid inlet pump 3 and the liquid outlet pump 4 are 6-inch single-head pumps. In an alternative embodiment, both the liquid inlet pump 3 and the liquid outlet pump 4 are 3-inch double-head pumps, and the pressures of both the liquid inlet pump 3 and the liquid outlet pump 4 need to be adjusted to -10 mmHg.

[0042] In summary, this method for controlling the compression degree of the left and right hearts during extracorporeal circulation adjusts the negative pressure of the liquid inlet pump 3 through the first pressure measurement structure 9 and adjusts the negative pressure of the liquid outlet pump 4 through the second pressure measurement structure 10, so as to achieve the purpose of quantifying the adjustment method, making the adjustment process of controlling the compression degree of the left and right hearts before extracorporeal circulation visible, and at the same time maintaining the stable pressures of the liquid outlet pump 4 and the liquid inlet pump 3. It can ensure the accuracy of the compression degree of the left and right hearts during extracorporeal circulation while ensuring the stability of the adjustment. The adjustment method is accurate, fast, and highly reliable, and can effectively avoid the situation of "collapse" or "inability to suck" of the tube connected to the peristaltic pump 2 during the operation, which may cause a reduction in the blood volume transported by the pump, insufficient blood supply, or direct interruption of blood circulation, resulting in risks such as blood component damage, hemolysis, and gas embolism.

[0043] Obviously, the above embodiments are only examples for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. The obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A method for controlling the compression degrees of the left and right hearts during extracorporeal circulation, characterized in that It includes the following steps: S1: In an ex vivo environment, install a peristaltic pump (2) at the left and right heart inlets of the extracorporeal circulation device (1); S2: Connect a liquid inlet pump (3) to the liquid inlet of the peristaltic pump (2), and connect a liquid outlet pump (4) to the liquid outlet of the peristaltic pump (2); S3: Set a first pressure measuring structure (9) on the side of the liquid inlet pump (3) away from the peristaltic pump (2), and adjust the pressure of the liquid inlet pump (3) to -20 mmHg; S4: Set a second pressure measuring structure (10) on the side of the liquid outlet pump (4) away from the peristaltic pump (2), and adjust the pressure of the liquid outlet pump (4) to -20 mmHg.

2. The method for controlling the compression degrees of the left and right hearts during extracorporeal circulation according to claim 1, wherein In the step S1, it needs to be carried out when both the liquid inlet pipe (5) and the liquid outlet pipe (6) are in a state of empty pipes without water or both are in a state of full pipes with liquid.

3. The method for controlling the compression degrees of the left and right hearts during extracorporeal circulation according to claim 1, wherein, In the steps S3 and S4, both the liquid inlet pump (3) and the liquid outlet pump (4) are 6-inch single-head pumps.

4. The method for controlling the left and right heart compression degrees during extracorporeal circulation according to claim 1, characterized in that, In the steps S3 and S4, both the liquid inlet pump (3) and the liquid outlet pump (4) are 3-inch double-head pumps.

5. The method for controlling the compression degrees of the left and right hearts during extracorporeal circulation according to claim 4, characterized in that, In the steps S3 and S4, the pressures of both the liquid inlet pump (3) and the liquid outlet pump (4) need to be adjusted to -10 mmHg.

6. The method for controlling the compression degrees of the left and right hearts during extracorporeal circulation according to claim 1, wherein It further includes step S5: Install pressure adjustment structures 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, then perform pressure reduction or pressure increase through the pressure adjustment structures.

7. The method for controlling the compression degrees of the left and right hearts during extracorporeal circulation according to claim 1, characterized in that, In the step S2, the liquid inlet pump (3) is connected to the peristaltic pump (2) through the liquid inlet pipe (5), and the liquid outlet pump (4) is connected to the peristaltic pump (2) through the liquid outlet pipe (6).

8. The method for controlling the compression degrees of the left and right hearts during extracorporeal circulation according to claim 7, wherein, The liquid inlet pump (3) is connected to the middle of the liquid inlet pipe (5), and one end of the liquid inlet pipe (5) away from the peristaltic pump (2) is connected to a water bucket (11).

9. The method for controlling the compression degrees of the left and right hearts during extracorporeal circulation according to claim 8, wherein, The liquid outlet pump (4) is connected to the middle of the liquid outlet pipe (6), and one end of the liquid outlet pipe (6) away from the peristaltic pump (2) is connected to the water bucket (11).

10. The method for controlling the left and right heart compression degrees during extracorporeal circulation according to claim 9, wherein The water bucket (11) is suitable for containing ordinary water.

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