Method for preoperatively controlling tightness of left and right heart pressure in extracorporeal circulation

Abstract

This invention discloses a method for controlling left and right ventricular compression before extracorporeal circulation. First, in an in vitro environment, peristaltic pumps are installed at the left and right ventricular inlets of the extracorporeal circulation device. Then, an inlet pump is connected to the inlet of the peristaltic pumps, and an outlet pump is connected to the outlet of the peristaltic pumps. Finally, a first pressure measuring structure and a second pressure measuring structure are respectively installed on the side of the inlet and outlet pumps away from the peristaltic pumps, and the pressure of both the inlet and outlet pumps is adjusted to -180 mmHg. The negative pressure of the inlet pump is adjusted by the first pressure measuring structure, and the negative pressure of the outlet pump is adjusted by the second pressure measuring structure, thereby quantifying the adjustment method. This visualizes the process of controlling left and right ventricular compression before extracorporeal circulation, converting the adjustment results into specific negative pressure values ​​for the inlet and outlet pumps. This makes the reference values ​​for adjusting left and right ventricular compression numerically and standardized, avoiding adjustment discrepancies, eliminating reliance on experience and intuition, and providing a quick and highly accurate adjustment method.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a method for controlling left and right ventricular compression before extracorporeal circulation surgery. Background Technology

[0002] Since the suction of the left and right ventricles is a significant factor affecting the incidence of hemoglobinuria, the adjustment of the left and right ventricle compression is crucial. In current practice, the inlets of the left and right ventricles are usually clamped, and then the rolling pump is rotated to listen for the popping sound, thereby adjusting the left and right ventricle compression of the extracorporeal circulation device. However, this can only achieve a coarse adjustment, because there is no fluid in the left and right ventricles before the extracorporeal circulation device is turned on, so fine adjustment is not possible. Therefore, the accuracy of adjusting the left and right ventricle compression of the extracorporeal circulation device is extremely low, and the degree of adjustment depends entirely on the perfusionist's personal experience. The adjustment efficiency is low, it is very inconvenient, and it is extremely unfriendly to novice perfusionists.

[0003] Therefore, we designed an in vitro experiment (such as...). Figure 1 (As shown): Install a 1 / 4LL connector at the inlet of the left and right hearts, and connect a sterile saline bag to the outside. Also install a 1 / 4LL connector at the outlet of the pump, connecting a double-positive tube to the membrane lung. Clamp the distal ends of the saline tube and the double-positive tube at the outlet with tubing clamps. Then gently rotate the roller pump until the sterile saline solution fills the double-positive tube. Remove the double-positive tube from the membrane lung and stretch it to a certain height. At this point, the compression of the left and right hearts can be precisely adjusted, greatly improving the accuracy of compression in extracorporeal circulation. After adjustment, invert the left and right hearts to recover the saline solution from the left and right heart tubes into the sterile saline bag, and finally discard it. This method can be considered a "gold standard" for adjusting the compression of the left and right hearts.

[0004] While the existing adjustment methods have solved the problem of the accuracy of left and right ventricular compression adjustment in extracorporeal circulation devices, the adjustment methods cannot be quantified and there is no specific and controllable adjustment standard. Each person's understanding of the adjustment action 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 of adjusting the left and right ventricular pressure in extracorporeal circulation devices, such as the inability to quantify the adjustment method, individual differences in adjustment, and the resulting differences in the final adjustment accuracy. Thus, it provides a method for controlling the left and right ventricular pressure before extracorporeal circulation.

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

[0007] A method for controlling left and right ventricular compression before cardiopulmonary bypass surgery includes the following steps:

[0008] S1: In an in vitro environment, peristaltic pumps are installed at the left and right ventricular inlets of the extracorporeal circulation device;

[0009] S2: Connect the inlet pump to the inlet of the peristaltic pump and the outlet pump to the outlet of the peristaltic pump.

[0010] 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 -180 mmHg;

[0011] 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 -180 mmHg.

[0012] Furthermore, in step S2, the inlet pump is connected to the peristaltic pump via an inlet pipe.

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

[0014] Furthermore, in steps S3 and S4, both the inlet pump and the outlet pump are 6-inch single-head pumps.

[0015] Furthermore, in steps S3 and S4, both the inlet pump and the outlet pump are 3-inch dual-head pumps.

[0016] Furthermore, in steps S3 and S4, the pressure of both the inlet pump and the outlet pump is adjusted to -90 mmHg.

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

[0018] Furthermore, in step S2, the inlet pump is positioned at 1 / 4 of the closed end of the inlet pipe, and the outlet pump is positioned at 1 / 4 of the closed end of the outlet pipe.

[0019] Furthermore, in step S2, the first pressure measuring structure is connected to the inlet pump via a first connecting pipe, and the second pressure measuring structure is connected to the outlet pump via a second connecting pipe.

[0020] Furthermore, the inlet pipe is sealed using clamps.

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

[0022] 1. The method for controlling left and right ventricular compression before cardiopulmonary bypass provided by this invention adjusts the negative pressure of the inlet pump through a first pressure measuring structure and adjusts 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 compression before cardiopulmonary bypass visible. The adjustment result is converted into specific negative pressure values ​​of the inlet and outlet pumps, making the reference values ​​for adjusting the compression of the left and right hearts numerical and standardized, avoiding adjustment differences, eliminating the need to rely on experience and intuition, and making the adjustment method quick and highly accurate. 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 A schematic diagram of the adjustment device for adjusting the left and right ventricular compression in existing cardiopulmonary bypass methods;

[0025] Figure 2 This is a schematic diagram of the structure in this application for adjusting the left and right heart pressure in extracorporeal circulation through the first pressure measuring structure and the second pressure measuring structure.

[0026] Explanation of reference numerals in the attached drawings: 1. Peristaltic pump; 2. Inlet pipe; 3. Outlet pipe; 4. First connecting pipe; 5. Second connecting pipe; 6. Clamp; 7. Inlet pump; 8. Outlet pump; 9. First pressure measuring structure; 10. Second pressure measuring structure. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] like Figure 2 The method shown includes the following steps for controlling left and right ventricular pressure before cardiopulmonary bypass:

[0032] S1: In an in vitro environment, peristaltic pump 1 is installed at the left and right ventricular inlets of the extracorporeal circulation device;

[0033] S2: Connect the inlet pump 7 to the inlet of the peristaltic pump 1, and connect the outlet pump 8 to the outlet of the peristaltic pump 1.

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

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

[0036] This method of controlling the pressure of the left and right hearts before cardiopulmonary bypass surgery adjusts the negative pressure of the inlet pump 7 through the first pressure measuring structure 9 and the negative pressure of the outlet pump 8 through the second pressure measuring structure 10. This achieves the purpose of quantifying the adjustment method, making the adjustment process of controlling the pressure of the left and right hearts before cardiopulmonary bypass surgery visible, and converting the adjustment result into specific negative pressure values ​​of the inlet pump 7 and the outlet pump 8. This makes the reference value for adjusting the pressure of the left and right hearts numerical and standardized, avoiding adjustment differences, eliminating the need to rely on experience and intuition, and making the adjustment method quick and highly accurate.

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

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

[0039] In step S2, the first pressure measuring structure 9 is connected to the inlet pump 7 via the first connecting pipe 4, and the second pressure measuring structure 10 is connected to the outlet pump 8 via the second connecting pipe 5. Specifically, the inlet pipe 2 is clamped and sealed using clamps 6. In an alternative embodiment, the inlet pipe 2 can also be sealed and sealed using an infusion set stop clamp. This configuration uses commonly used hospital tools and eliminates the need for an additional sealing and clamping structure, effectively saving medical expenses.

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

[0041] In this embodiment, adjusting the left and right ventricular compression through the above steps can effectively shorten the preoperative preparation for cardiopulmonary bypass and improve surgical efficiency. This adjustment method can be repeated after the surgery is completed to facilitate the next cardiopulmonary bypass procedure, and repeated adjustments in this way do not affect the accuracy of the adjustment.

[0042] In summary, this method of controlling the pressure of the left and right hearts before cardiopulmonary bypass surgery achieves the goal of quantifying the adjustment process by adjusting the negative pressure of the inlet pump 7 through the first pressure measuring structure 9 and adjusting the negative pressure of the outlet pump 8 through the second pressure measuring structure 10. This makes the adjustment process of controlling the pressure of the left and right hearts before cardiopulmonary bypass surgery visible, and converts the adjustment results into specific negative pressure values ​​of the inlet pump 7 and outlet pump 8. This makes the reference values ​​for adjusting the pressure of the left and right hearts numerical and standardized, avoids adjustment differences, eliminates the need to rely on experience and intuition, and makes the adjustment method quick and highly accurate.

[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 before cardiopulmonary bypass surgery, characterized in that, Includes the following steps: S1: In an in vitro environment, peristaltic pumps (1) are installed at the left and right heart inlets of the extracorporeal circulation device; S2: Connect the inlet pump (7) to the inlet of the peristaltic pump (1) through the inlet pipe (2), and connect the outlet pump (8) to the outlet of the peristaltic pump (1) through the outlet pipe (3). S3: Connect the first pressure measuring structure (9) to the side of the inlet pump (7) away from the peristaltic pump (1) through the first connecting pipe (4) to adjust the pressure of the inlet pump (7) to -180mmHg; S4: Connect the second pressure measuring structure (10) to the side of the outlet pump (8) away from the peristaltic pump (1) through the second connecting pipe (5) to adjust the pressure of the outlet pump (8) to -180mmHg; adjust the negative pressure of the inlet pump (7) through the first pressure measuring structure (9) and adjust the negative pressure of the outlet pump (8) through the second pressure measuring structure (10) to achieve the purpose of quantifying the adjustment method, making the adjustment process of controlling the left and right heart pressure before cardiopulmonary bypass visible, and converting the adjustment result into the specific negative pressure values ​​of the inlet pump (7) and the outlet pump (8), so as to make the reference value of adjusting the left and right heart pressure numerical and standardized. S5: After adjusting the negative pressure values ​​of the inlet pump (7) and the outlet pump (8), the standardization adjustment of the left and right heart pressure of the extracorporeal circulation device can be achieved by adjusting the peristaltic pump (1).

2. The method for controlling left and right ventricular compression before cardiopulmonary bypass surgery according to claim 1, characterized in that, In steps S3 and S4, both the inlet pump (7) and the outlet pump (8) are 6-inch single-head pumps.

3. The method for controlling left and right ventricular compression before cardiopulmonary bypass surgery according to claim 1, characterized in that, In steps S3 and S4, both the inlet pump (7) and the outlet pump (8) are 3-inch dual-head pumps.

4. The method for controlling left and right ventricular compression before cardiopulmonary bypass surgery according to claim 3, characterized in that, In steps S3 and S4, the pressure of both the inlet pump (7) and the outlet pump (8) is adjusted to -90 mmHg.

5. The method for controlling left and right ventricular compression before cardiopulmonary bypass surgery according to claim 1, characterized in that, In step S2, the end of the inlet pipe (2) away from the peristaltic pump (1) is closed.

6. The method for controlling left and right ventricular compression before cardiopulmonary bypass surgery according to claim 5, characterized in that, In step S2, the inlet pump (7) is positioned at 1 / 4 of the closed end of the inlet pipe (2), and the outlet pump (8) is positioned at 1 / 4 of the closed end of the outlet pipe (3).

7. The method for controlling left and right ventricular compression before cardiopulmonary bypass surgery according to claim 5, characterized in that, The inlet pipe (2) is closed by clamping with clamps (6).

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