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

Abstract

The invention discloses a method for controlling left and right heart compaction degree before extracorporeal circulation operation, which comprises the following steps of: installing a peristaltic pump at a left and right heart inlet of an extracorporeal circulation device in an in-vitro environment; 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-180 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, the adjusting process for controlling the left and right heart compression degree before the extracorporeal circulation operation is visualized, the adjusting result is converted into the specific negative pressure values of the liquid inlet pump and the liquid outlet pump, and the accuracy of the operation is improved. The pressing degree reference for adjusting the left center and the right center is numeralized and standardized, the adjusting difference is avoided, experience and feeling are not needed, and the adjusting mode is fast and high in accuracy.

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 before extracorporeal circulation. Background Art

[0002] Since the suction of the left and right hearts is an important factor affecting the incidence of hemoglobinuria, the adjustment of the compression degree of the left and right hearts is crucial. In current practice, generally, the inlets of the left and right hearts are clamped, and then the roller pump is rotated to listen for the clicking sound to adjust the compression degree of the left and right hearts of the extracorporeal circulation device. However, this can only achieve a rough adjustment because there is no liquid in the left and right hearts of the extracorporeal circulation device before the machine is turned on, so fine adjustment cannot be performed. Therefore, the accuracy of adjusting the compression degree of the left and right hearts of the extracorporeal circulation device is extremely low, and the degree of adjustment depends entirely on the personal experience of the perfusionist. The adjustment efficiency is low and very inconvenient, which is extremely unfriendly to novice perfusionists.

[0003] For this reason, we designed an in vitro experiment (as Figure 1 shown): Install a 1 / 4LL joint at the inlets of the left and right hearts, externally connect a soft bag of sterile saline, also install a 1 / 4LL joint at the pump outlet, connect it to the membrane lung with a double positive tube, clamp the distal ends of the saline installation and the double positive tube at the pump outlet with a pipe wrench, then gently rotate the roller pump until the double positive tube is filled with sterile saline liquid, then remove the double positive tube from the membrane lung 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 adjusting the compression degree of the left and right hearts of the extracorporeal circulation. After the adjustment is completed, invert the left and right hearts to recover the saline in the left and right heart tubes into the sterile saline bag, and finally discard it. This method can be regarded as a "gold standard" for adjusting the compression degree of the left and right hearts.

[0004] Although the existing above-mentioned adjustment method solves the problem of the accuracy of adjusting the compression degree of the left and right hearts of the extracorporeal circulation device, the adjustment method cannot be quantified, there is no specific controllable adjustment standard, and everyone's understanding of the adjustment actions during the adjustment process will be different, which will lead to differences in the final adjustment accuracy. Summary of the Invention

[0005] Therefore, the present invention aims to solve the problems in the prior art that the adjustment of the compression degree of the left and right hearts of the extracorporeal circulation device cannot be quantified, there are individual differences in adjustment, and it will lead to differences in the final adjustment accuracy, so as to provide a method for controlling the compression degree of the left and right hearts before extracorporeal circulation.

[0006] To solve the above technical problems, the technical solution of the present invention is as follows:

[0007] A method for controlling the compression degree of the left and right hearts before extracorporeal circulation, comprising the following steps:

[0008] S1: Install peristaltic pumps at the left and right heart inlets of the extracorporeal circulation device in an ex vivo environment;

[0009] S2: Connect a feed pump to the inlet of the peristaltic pump and connect a discharge pump to the outlet of the peristaltic pump;

[0010] S3: Set a first pressure measurement structure on the side of the feed pump away from the peristaltic pump and adjust the pressure of the feed pump to -180 mmHg;

[0011] S4: Set a second pressure measurement structure on the side of the discharge pump away from the peristaltic pump and adjust the pressure of the discharge pump to -180 mmHg.

[0012] Further, in step S2, the feed pump is connected to the peristaltic pump through a feed pipe.

[0013] Further, in step S2, the discharge pump is connected to the peristaltic pump through a discharge pipe.

[0014] Further, in step S3 and step S4, both the feed pump and the discharge pump are 6-inch single-head pumps.

[0015] Further, in step S3 and step S4, both the feed pump and the discharge pump are 3-inch double-head pumps.

[0016] Further, in step S3 and step S4, the pressures of both the feed pump and the discharge pump are adjusted to -90 mmHg.

[0017] Further, in step S2, the end of the feed pipe away from the peristaltic pump is closed.

[0018] Further, in step S2, the feed pump is arranged at the 1 / 4 position of the closed end of the feed pipe, and the discharge pump is arranged at the 1 / 4 position of the closed end of the discharge pipe.

[0019] Further, in step S2, the first pressure measurement structure is connected to the feed pump through a first connecting pipe, and the second pressure measurement structure is connected to the discharge pump through a second connecting pipe.

[0020] Further, the closed part of the feed pipe is clamped and closed by a clamp.

[0021] The technical solution of the present invention has the following advantages:

[0022] 1. The method for controlling the compression degrees of the left and right hearts before 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 degrees of the left and right hearts before extracorporeal circulation visual, converting the adjustment result into specific negative pressure values of the liquid inlet pump and the liquid outlet pump, making the reference values for adjusting the compression degrees of the left and right hearts numerical and standardized, avoiding adjustment differences, and eliminating the need to rely on experience and feeling. The adjustment method is fast and highly accurate. 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 be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of an adjustment device for the existing adjustment method of the compression degrees of the left and right hearts in extracorporeal circulation;

[0025] Figure 2 It is a schematic structural diagram of adjusting the compression degrees of the left and right hearts in extracorporeal circulation through the first pressure measuring structure and the second pressure measuring structure in the embodiment of the present application.

[0026] Description of the reference numerals: 1, peristaltic pump; 2, liquid inlet pipe; 3, liquid outlet pipe; 4, first connecting pipe; 5, second connecting pipe; 6, clamp; 7, liquid inlet pump; 8, liquid outlet pump; 9, first pressure measuring structure; 10, second pressure measuring structure. Specific Embodiments

[0027] The following will clearly and completely describe the technical solutions of the present invention with reference to the 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 without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0028] 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, and 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 cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components. 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 circumstances.

[0030] 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.

[0031] Such as Figure 2 A method for controlling the compression degree of the left and right hearts before extracorporeal circulation is shown as follows, including the following steps:

[0032] S1: In an ex vivo environment, a peristaltic pump 1 is installed at the left and right heart inlets of the extracorporeal circulation device;

[0033] S2: A liquid inlet pump 7 is connected to the liquid inlet of the peristaltic pump 1, and a liquid outlet pump 8 is connected to the liquid outlet of the peristaltic pump 1;

[0034] S3: A first pressure measuring structure 9 is arranged on the side of the liquid inlet pump 7 away from the peristaltic pump 1, and the pressure of the liquid inlet pump 7 is adjusted to -180 mmHg;

[0035] S4: A second pressure measuring structure 10 is arranged on the side of the liquid outlet pump 8 away from the peristaltic pump 1, and the pressure of the liquid outlet pump 8 is adjusted to -180 mmHg.

[0036] This method for controlling the compression degree of the left and right hearts before extracorporeal circulation adjusts the negative pressure of the liquid inlet pump 7 through the first pressure measuring structure 9 and adjusts the negative pressure of the liquid outlet pump 8 through the second pressure measuring 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 visual, converting the adjustment result into the specific negative pressure values of the liquid inlet pump 7 and the liquid outlet pump 8, making the reference values for adjusting the compression degree of the left and right hearts numerical and standardized, avoiding adjustment differences, without relying on experience and feeling, and the adjustment method is fast and highly accurate.

[0037] In step S2, the liquid inlet pump 7 is connected to the peristaltic pump 1 through a liquid inlet pipe 2, and the liquid outlet pump 8 is connected to the peristaltic pump 1 through a liquid outlet pipe 3.

[0038] In step S2, the end of the liquid inlet pipe 2 away from the peristaltic pump 1 is closed. Specifically, the liquid inlet pump 7 is arranged at the 1 / 4 position of the closed end of the liquid inlet pipe 2, and the liquid outlet pump 8 is arranged at the 1 / 4 position of the closed end of the liquid outlet pipe 3.

[0039] In step S2, the first pressure measuring structure 9 is connected to the liquid inlet pump 7 through the first connecting pipe 4, and the second pressure measuring structure 10 is connected to the liquid outlet pump 8 through the second connecting pipe 5. Specifically, the closed part of the liquid inlet pipe 2 is clamped and sealed by the clamp 6. In an alternative embodiment, the closed part of the liquid inlet pipe 2 can also be sealed and clamped by an infusion clamp. With such a setting, using tools commonly used in hospitals, there is no need to design an additional structure for sealing and clamping, which can effectively save the medical expenditure cost.

[0040] In step S3 and step S4, both the liquid inlet pump 7 and the liquid outlet pump 8 are 6-inch single-head pumps. In an alternative embodiment, both the liquid inlet pump 7 and the liquid outlet pump 8 are 3-inch double-head pumps, and the pressures of the liquid inlet pump 7 and the liquid outlet pump 8 using the 3-inch double-head pumps are both adjusted to -90 mmHg.

[0041] In this embodiment, adjusting the left and right heart compression degrees through the above steps can effectively shorten the preoperative preparation of the extracorporeal circulation operation and improve the operation efficiency. This adjustment method can be repeatedly adjusted after the operation is restored for the next use of the extracorporeal circulation operation, and repeated adjustment by this adjustment method will not affect the adjustment accuracy.

[0042] In summary, this method for controlling the left and right heart compression degrees before extracorporeal circulation adjusts the negative pressure of the liquid inlet pump 7 through the first pressure measuring structure 9 and adjusts the negative pressure of the liquid outlet pump 8 through the second pressure measuring structure 10, so as to achieve the purpose of quantifying the adjustment method, making the adjustment process of controlling the left and right heart compression degrees before extracorporeal circulation visual, converting the adjustment result into the specific negative pressure values of the liquid inlet pump 7 and the liquid outlet pump 8, making the reference values for adjusting the left and right heart compression degrees numerical and standardized, avoiding adjustment differences, without relying on experience and feeling, and the adjustment method is fast and highly accurate.

[0043] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill 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 manners here. And the obvious changes or modifications 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 before extracorporeal circulation, characterized in that, It includes the following steps: S1: In an ex vivo environment, install a peristaltic pump (1) at the left and right heart inlets of the extracorporeal circulation device; S2: Connect a feed pump (7) to the inlet of the peristaltic pump (1), and connect a discharge pump (8) to the outlet of the peristaltic pump (1); S3: Provide a first pressure measuring structure (9) on the side of the feed pump (7) away from the peristaltic pump (1), and adjust the pressure of the feed pump (7) to -180 mmHg; S4: Provide a second pressure measuring structure (10) on the side of the discharge pump (8) away from the peristaltic pump (1), and adjust the pressure of the discharge pump (8) to -180 mmHg.

2. The method for controlling the compression degree of the left and right hearts before extracorporeal circulation according to claim 1, characterized in that, In step S2, the feed pump (7) is connected to the peristaltic pump (1) through a feed pipe (2).

3. The method for controlling the compression degree of the left and right hearts before extracorporeal circulation according to claim 2, wherein, In step S2, the discharge pump (8) is connected to the peristaltic pump (1) through a discharge pipe (3).

4. The method for controlling the left and right heart compression degree before extracorporeal circulation according to claim 1, characterized in that, In step S3 and step S4, both the feed pump (7) and the discharge pump (8) are 6-inch single-head pumps.

5. The method for controlling the left and right heart compression degree before extracorporeal circulation according to claim 1, wherein In step S3 and step S4, both the feed pump (7) and the discharge pump (8) are 3-inch double-head pumps.

6. The method for controlling the compression degree of the left and right hearts before extracorporeal circulation according to claim 5, characterized in that, In step S3 and step S4, the pressures of both the feed pump (7) and the discharge pump (8) are adjusted to -90 mmHg.

7. The method for controlling the compression degree of the left and right hearts before extracorporeal circulation according to claim 3, wherein In step S2, the end of the feed pipe (2) away from the peristaltic pump (1) is closed.

8. The method for controlling the compression degree of the left and right hearts before extracorporeal circulation according to claim 7, characterized in that, In step S2, the feed pump (7) is arranged at the 1 / 4 position of the closed end of the feed pipe (2), and the discharge pump (8) is arranged at the 1 / 4 position of the closed end of the discharge pipe (3).

9. The method for controlling the compression degree of the left and right hearts before extracorporeal circulation according to claim 8, characterized in that, In step S2, the first pressure measuring structure (9) is connected to the feed pump (7) through a first connecting pipe (4), and the second pressure measuring structure (10) is connected to the discharge pump (8) through a second connecting pipe (5).

10. The method for controlling the left and right heart compression degree before extracorporeal circulation according to claim 7, wherein, The closed part of the feed pipe (2) is clamped and closed by a clamp (6).

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