Method for regulating the tightness of a main pump in extracorporeal circulation

Abstract

The application discloses a method for adjusting the pressure of a main pump in an extracorporeal circulation process, and the method comprises the following steps: after the pre-charging of a membrane oxygenator is completed, an arterial pipeline connected with the membrane oxygenator is clamped and closed, and only a small side pipeline is left to communicate with the membrane oxygenator; a pump pressure gauge is arranged on the small side pipeline; the main pump is adjusted to a required position, and the pressure of the main pump on the circulating pipeline is adjusted, and the pressure is adjusted to 150mmHg-250mmHg. The specific pressure value of the main pump when the pressure is adjusted is displayed by the pump pressure gauge, so that the adjustment process and result can be visualized, the adjustment result is converted into the specific pressure value of the pump pressure gauge, the reference data of the adjustment of the pressure of the main pump is standardized, the adjustment precision is effectively ensured without relying on experience and feeling, the adjustment mode is quick and accurate, the adjustment efficiency can be improved, and the stability of the adjustment pressure is ensured by controlling the pressure of the main pump, so that the backflow of arterial blood caused by unstable pressure can be avoided.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a method for adjusting the pressure of an active pump during extracorporeal circulation. Background Technology

[0002] In cardiopulmonary bypass surgery, the adjustment of the active pump tubing is crucial. However, in practice, it is difficult to precisely control the tightness of the active pump tubing and adjust it to the appropriate tightness. This can easily lead to insufficient perfusion, resulting in insufficient blood flow, blood damage, and even serious complications such as hemolysis, vascular damage, thrombosis, infection, or inflammation. Currently, there are two main methods for adjusting the pressure of the main pump tubing in extracorporeal circulation: one is to clamp the tubing at the pump inlet after the tubing is installed, adjust the main pump to the appropriate position, and listen for a "pop" while rotating the pump or observe the "filling" of the tubing in the pump tank. This method is a "coarse adjustment." The other method is to raise the thinner tubing of the arterial route by about 1 meter after the membrane lung is pre-filled, and then adjust the pressure of the pump head so that the water column in the raised tubing drops by less than 1 cm within one minute. Although this method is more precise, it requires readjustment if the drop in water column height exceeds the preset value within one minute, which is inefficient. Furthermore, it is difficult to maintain stable pressure in the tubing after adjustment, which may lead to arterial blood backflow and unstable adjustment reliability. Summary of the Invention

[0003] Therefore, the present invention aims to solve the problems of low efficiency and poor stability and reliability in the adjustment of left and right ventricular compression in the prior art, and thus provides a method for adjusting the compression of the active pump during extracorporeal circulation.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0005] A method for adjusting the pressure of an active pump during cardiopulmonary bypass includes the following steps:

[0006] S1: Pre-charge the membrane oxygenator;

[0007] S2: After pre-filling, clamp the arterial line connected to the membrane oxygenator, leaving only a thin side line connected to the intracardiac blood inlet on the membrane oxygenator;

[0008] S3: Install a pump pressure gauge on the narrow side pipe in step S2 above;

[0009] S4: Adjust the active pump on the circulation pipeline connected to the membrane oxygenator to the required position, and adjust the pressure of the active pump on the circulation pipeline. Adjust the pressure to 150mmHg-250mmHg using the value displayed by the pump pressure gauge in step S3 above.

[0010] Further, in step S2, the arterial conduit includes an aortic tube connected to the membrane oxygenator. The end of the aortic tube away from the membrane oxygenator is connected to a first branch tube and a second branch tube. A blood filtration device is connected to the first branch tube, and the blood filtration device is connected to the intracardiac blood inlet on the membrane oxygenator. The second branch tube is clamped.

[0011] Furthermore, the blood filtration device is connected to a waste liquid pipe, which is clamped.

[0012] Furthermore, the end of the waste liquid tube away from the blood filtration device is connected to the end of the second branch tube away from the aortic tube.

[0013] Furthermore, in step S3, the pump pressure gauge is positioned above the blood filtration device via a connecting pipe.

[0014] Further, in step S4, the circulation pipeline includes a circulation tube connected to the recirculation port of the membrane oxygenator, a venous tube connected to the venous blood inlet of the membrane oxygenator, and a squeeze tube connecting the circulation tube and the venous tube, with the active pump disposed on the squeeze tube.

[0015] Furthermore, in step S4, the pressure of the active pump when adjusting the compression of the extrusion tube is 200 mmHg.

[0016] Furthermore, in step S1, the air in the membrane oxygenator and the pipeline connected to it is discharged through the variable temperature water inlet at the bottom of the membrane oxygenator.

[0017] Furthermore, the blood filtration device is connected to the membrane oxygenator via an inlet pipe.

[0018] Furthermore, the blood filtration device is a microembolism filter.

[0019] The technical solution of this invention has the following advantages:

[0020] 1. The method for adjusting the active pump pressure during cardiopulmonary bypass provided by this invention displays the specific pressure value of the active pump when adjusting the pressure through a pump pressure gauge. This makes the adjustment process and results of controlling the active pump pressure during cardiopulmonary bypass visible, converting the adjustment result into a specific pressure value on the pump pressure gauge. This makes the reference data for adjusting the active pump pressure quantifiable and standardized, eliminating reliance on experience and intuition, effectively ensuring the accuracy of the adjustment. The adjustment method is quick and highly accurate, improving adjustment efficiency. At the same time, this adjustment method ensures the stability of the adjustment pressure by controlling the active pump pressure, which can prevent arterial blood backflow due to unstable pressure. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the membrane oxygenator in the method for adjusting the pressure of the active pump during extracorporeal circulation provided in an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached diagram: 1. Membrane oxygenator; 2. Active pump; 3. Pump pressure gauge; 4. Aortic tube; 5. First branch tube; 6. Second branch tube; 7. Waste fluid tube; 8. Blood filtration device; 9. Intravenous tube; 10. Circulation tube; 11. Squeezing tube; 12. Connecting tube; 13. Recirculation port; 14. Venous blood inlet; 15. Temperature-controlled water inlet; 16. Intracardiac blood inlet; 17. Arterial blood outlet; 18. Artery. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] like Figure 1 The method for adjusting the active pump pressure during cardiopulmonary bypass includes the following steps:

[0029] S1: Pre-charge membrane oxygenator 1;

[0030] S2: After pre-filling, the arterial line connected to the membrane oxygenator 1 is clamped, leaving only a thin side line connected to the intracardiac blood inlet 16 on the membrane oxygenator 1.

[0031] S3: Install pump pressure gauge 3 on the small side pipe in step S2 above;

[0032] S4: Adjust the active pump 2 connected to the circulation pipeline of the membrane oxygenator 1 to the required position, and adjust the pressure of the active pump 2 on the circulation pipeline. Adjust the pressure to 200 mmHg using the value displayed by the pump pressure gauge 3 in step S3 above.

[0033] This method of adjusting the pressure of the active pump during cardiopulmonary bypass displays the specific pressure value of the active pump 2 when adjusting its pressure via the pump pressure gauge 3. This makes the adjustment process and results of controlling the pressure of the active pump 2 during cardiopulmonary bypass visible, converting the adjustment result into a specific pressure value on the pump pressure gauge 3. This makes the reference data for adjusting the pressure of the active pump 2 quantifiable and standardized, eliminating reliance on experience and intuition, effectively ensuring the accuracy of the adjustment. The adjustment method is quick and highly accurate, improving adjustment efficiency. At the same time, this adjustment method ensures the stability of the regulated pressure by controlling the pressure of the active pump 2, which can prevent arterial blood backflow due to unstable pressure.

[0034] In this embodiment, in step S1, the variable-temperature water inlet 15 at the bottom of the membrane oxygenator 1 is connected to the pre-filling structure to form a variable-temperature water channel, thereby discharging air from the membrane oxygenator 1 and the pipeline connected to it. This arrangement prevents air from entering the bloodstream and flowing back into the human body, causing harm.

[0035] In step S2, the arterial conduit includes an aortic tube 4 connected to the arterial blood outlet 17 of the membrane oxygenator 1. The end of the aortic tube 4 away from the membrane oxygenator 1 is connected to a first branch tube 5 and a second branch tube 6. A blood filtration device 8 is connected to the first branch tube 5. The blood filtration device 8 is connected to the intracardiac blood inlet 16 on the membrane oxygenator 1. The second branch tube 6 is clamped.

[0036] Specifically, the blood filtration device 8 is a microembolism filter. The microembolism filter is connected to the membrane oxygenator 1 through an inlet pipe; a waste liquid pipe 7 is connected to the bottom of the microembolism filter, and the waste liquid pipe 7 is clamped. Specifically, the end of the waste liquid pipe 7 away from the blood filtration device 8 is connected to the end of the second branch pipe 6 away from the aortic tube 4.

[0037] In step S3, the pump pressure gauge 3 is positioned above the blood filtration device 8 via the connecting pipe 12. This arrangement places the temperature-controlled water inlet 15, which connects the bottom of the membrane oxygenator 1 to the pre-filling structure, between the active pump 2 and the pump pressure gauge 3. After adjusting the pressure of the active pump 2, the pressure of the pump pressure gauge 3 stabilizes. At this time, the temperature-controlled water circuit is also under stable pressure, and the pressure value of the pump pressure gauge 3 is affected by the pressure of the temperature-controlled water circuit. When a leak occurs in the temperature-controlled water entering the membrane oxygenator 1, the pressure value of the pump pressure gauge 3 will also change, making it easily detectable.

[0038] In step S4, the circulation pipeline includes a circulation tube 10 connected to the recirculation port 13 of the membrane oxygenator 1, a venous tube 9 connected to the venous blood inlet 14 of the membrane oxygenator 1, and a squeeze tube 11 connected between the circulation tube 10 and the venous tube 9, and the active pump 2 is disposed on the squeeze tube 11.

[0039] In summary, this method of adjusting the pressure of the active pump during cardiopulmonary bypass (CPR) displays the specific pressure value of the active pump 2 during pressure adjustment via the pump pressure gauge 3. This makes the adjustment process and results of controlling the pressure of the active pump 2 during CPR visible, converting the adjustment result into a specific pressure value on the pump pressure gauge 3. This makes the reference data for adjusting the pressure of the active pump 2 quantifiable and standardized, eliminating reliance on experience and intuition, effectively ensuring the accuracy of the adjustment. The adjustment method is quick and highly accurate, improving adjustment efficiency. At the same time, this adjustment method ensures the stability of the adjustment pressure by controlling the pressure of the active pump 2, which can prevent arterial blood backflow due to pressure instability.

[0040] 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 adjusting the pressure of an active pump during cardiopulmonary bypass, characterized in that, Includes the following steps: S1: Pre-charge the membrane oxygenator (1); S2: After pre-charging is completed, clamp the arterial vessel (18) connected to the membrane oxygenator (1); S3: An arterial conduit is provided, the arterial conduit includes an aortic tube (4) connected to the membrane oxygenator (1), the aortic tube (4) is connected to a first branch tube (5) and a second branch tube (6) at the end away from the membrane oxygenator (1), a blood filtration device (8) is connected at the end of the first branch tube (5), the blood filtration device (8) is connected to the arterial vessel (18), the second branch tube (6) is clamped, and a pump pressure gauge (3) is provided on the blood filtration device (8) through a connecting pipe (12); S4: The membrane oxygenator (1) is provided with a recirculation port (13) and a venous blood inlet (14), and a circulation pipeline is provided. The circulation pipeline includes a circulation tube (10) connected to the recirculation port (13), a venous tube (9) connected to the venous blood inlet (14), and a squeeze tube (11) connected between the circulation tube (10) and the venous tube (9). An active pump (2) is provided on the squeeze tube (11). S5: Adjust the active pump (2) to the required position and adjust the pressure of the active pump (2) on the circulation pipeline. Adjust the pressure to 150mmHg-250mmHg using the value displayed by the pump pressure gauge (3) in step S3 above. The pump pressure gauge (3) displays the specific pressure value when adjusting the pressure of the active pump (2), making the adjustment process and result of controlling the pressure of the active pump (2) for extracorporeal circulation visible. The adjustment result is converted into the specific pressure value of the pump pressure gauge (3), making the reference data for adjusting the pressure of the active pump (2) quantified and standardized.

2. The method for adjusting the pressure of the active pump during cardiopulmonary bypass according to claim 1, characterized in that, The blood filtration device (8) is connected to a waste liquid pipe (7), which is clamped.

3. The method for adjusting the pressure of the active pump during extracorporeal circulation according to claim 2, characterized in that, The end of the waste liquid pipe (7) away from the blood filtration device (8) is connected to the end of the second branch pipe (6) away from the aortic pipe (4).

4. The method for adjusting the pressure of the active pump during cardiopulmonary bypass according to claim 1, characterized in that, In step S4, the pressure of the active pump (2) when adjusting the compression of the extrusion tube (11) is 200 mmHg.

5. The method for adjusting the pressure of the active pump during extracorporeal circulation according to claim 1, characterized in that, In step S1, the membrane oxygenator (1) is connected to the pre-charge structure through the variable temperature water inlet (15) at the bottom to discharge the air in the membrane oxygenator (1) and the pipeline connected to it.

6. The method for adjusting the pressure of the active pump during extracorporeal circulation according to claim 1, characterized in that, The blood filtration device (8) is a microembolism filter.

Images