Method for adjusting compaction degree of active pump through extracorporeal circulation

Abstract

The invention discloses a method for adjusting the compression degree of an active pump through extracorporeal circulation, which comprises the following steps: after pre-charging of a membrane type oxygenator is finished, clamping an artery pipeline connected with the membrane type oxygenator, and only leaving a small side pipeline to be communicated with the membrane type oxygenator; a pumping pressure meter is arranged on the small side pipeline; and adjusting the driving pump to a required position, and adjusting the compaction degree of the driving pump to the circulating pipeline to 150 mmHg to 250 mmHg. The specific pressure value when the compression degree of the active pump is adjusted is displayed through the pump pressure gauge, so that the adjusting process and the adjusting result are visualized, the adjusting result is converted into the specific pressure value of the pump pressure gauge, reference datamation and standardization of the compression degree of the active pump are achieved, experience and feeling are not needed, the adjusting precision is effectively guaranteed, and the working efficiency is improved. The adjusting mode is rapid and high in accuracy, the adjusting efficiency can be improved, meanwhile, the stability of the adjusting pressure is guaranteed by controlling the pressing degree of the active pump, and backflow of arterial blood due to unstable pressure can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a method for adjusting the compression degree of an active pump in extracorporeal circulation surgery. Background Art

[0002] In extracorporeal circulation surgery, the adjustment of the pump tube of the active pump is very important. However, in actual operation, it is very difficult to accurately control the adjustment of the compression degree of the pump tube of the active pump, and it is difficult to adjust the pump tube to an appropriate compression degree. Therefore, it is easy to cause insufficient perfusion, resulting in insufficient blood flow, blood damage, and even serious complications such as hemolysis, vascular injury, thrombosis, infection or inflammation. At present, there are mainly two mainstream methods for adjusting the compression degree of the pump tube of the extracorporeal circulation main pump: one is to clamp the pipeline at the inlet of the main pump after installing the pipeline, adjust the main pump to an appropriate position, listen to the "bouncing sound" while rotating the pump, or check the "filling degree" of the pump tube in the pump slot. This method is a "coarse adjustment"; the other is to raise the thinner pipeline of the arterial circuit about 1 meter after the membrane lung is pre-filled, and then adjust the compression degree of the pump head so that the water column in the raised pipeline drops less than 1 cm within one minute. Although this adjustment method is more detailed, if the result of waiting and observing the drop height of the water column in the pipeline within one minute exceeds the preset value, it needs to be adjusted again. The efficiency is too low, and it is difficult to maintain the pressure stability in the pipeline after adjustment, which may cause arterial blood backflow and the adjustment reliability is unstable. 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 the compression degree of the left and right hearts in the prior art, and thus provides a method for adjusting the compression degree of an active pump in extracorporeal circulation surgery.

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

[0005] A method for adjusting the compression degree of an active pump in extracorporeal circulation surgery, comprising the following steps:

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

[0007] S2: After the pre-filling is completed, clamp the arterial pipeline connected to the membrane oxygenator, and only leave a small side pipeline connected to the intracardiac blood inlet on the membrane oxygenator;

[0008] S3: Install a pump pressure gauge on the small side pipeline 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 compression degree of the active pump on the circulation pipeline. Adjust the compression degree to 150 mmHg - 250 mmHg according to the value displayed by the pump pressure gauge in step S3 above.

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

[0011] Further, a waste liquid tube is communicated with the blood filtration device, and the waste liquid tube is clamped.

[0012] Further, one end of the waste liquid tube away from the blood filtration device is communicated with one end of the second branch tube away from the aortic tube.

[0013] Further, in the step S3, the pump pressure gauge is arranged above the blood filtration device through a connecting tube.

[0014] Further, in the step S4, the circulation pipeline includes a circulation tube communicated with the recirculation port of the membrane oxygenator, a venous tube communicated with the venous blood inlet of the membrane oxygenator, and a squeezing tube communicated between the circulation tube and the venous tube. The active pump is arranged on the squeezing tube.

[0015] Further, in the step S4, the pressure when the active pump adjusts the pressing degree of the squeezing tube is 200 mmHg.

[0016] Further, in the step S1, the variable temperature water outlet at the bottom of the membrane oxygenator is communicated with the pre-filling structure to discharge the air in the membrane oxygenator and the pipeline connected thereto.

[0017] Further, the blood filter is communicated with the membrane oxygenator through a liquid inlet tube.

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

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

[0020] 1. The method for adjusting the pressing degree of the active pump in the extracorporeal circulation technology provided by the present invention shows the specific pressure value when the active pump adjusts the pressing degree through the pump pressure gauge, making the adjustment process and result of controlling the pressing degree of the active pump in the extracorporeal circulation technology visual. The adjustment result is converted into the specific pressure value of the pump pressure gauge, making the reference data for adjusting the pressing degree of the active pump digital and standardized. It does not need to rely on experience and feeling, effectively ensuring the accuracy of the adjustment. The adjustment method is fast and accurate, which can improve the adjustment efficiency. At the same time, this adjustment method ensures the stability of the adjustment pressure by controlling the pressing degree of the active pump, and can avoid the backflow of arterial blood due to unstable pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 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.

[0022] Figure 1 FIG. is a schematic structural diagram of a membrane oxygenator in the method for adjusting the pressing degree of an active pump in extracorporeal circulation provided by an embodiment of the present invention.

[0023] Description of reference numerals: 1. Membrane oxygenator; 2. Active pump; 3. Pump pressure gauge; 4. Aortic tube; 5. First branch tube; 6. Second branch tube; 7. Waste liquid tube; 8. Blood filtration device; 9. Venous tube; 10. Circulation tube; 11. Squeezing tube; 12. Connecting tube; 13. Recirculation port; 14. Venous blood inlet; 15. Variable temperature water inlet; 16. Intracardiac blood inlet; 17. Arterial blood outlet; 18. Arterial blood vessel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] 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.

[0025] 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 therefore should not 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.

[0026] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "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 internal communication of 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 circumstances.

[0027] 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.

[0028] As Figure 1 shown, a method for adjusting the pressing degree of an active pump in extracorporeal circulation includes the following steps:

[0029] S1: Precharge the membrane oxygenator 1;

[0030] S2: After the precharging is completed, clamp the arterial pipeline connected to the membrane oxygenator 1, leaving only a small side pipeline communicating with the intracardiac blood inlet 16 on the membrane oxygenator 1;

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

[0032] S4: Adjust the active pump 2 on the circulation pipeline 10 communicating with the membrane oxygenator 1 to the required position, and adjust the pressing degree of the active pump 2 on the circulation pipeline 10. Adjust the pressing degree to 200 mmHg according to the value displayed by the pump pressure gauge 3 in step S3 above.

[0033] This method for adjusting the pressing degree of an active pump in extracorporeal circulation visualizes both the adjustment process and result of controlling the pressing degree of the active pump 2 by displaying the specific pressure value when adjusting the pressing degree of the active pump 2 through the pump pressure gauge 3. It converts the adjustment result into a specific pressure value of the pump pressure gauge 3, making the reference for adjusting the pressing degree of the active pump 2 data-based and standardized. Without relying on experience and feeling, it effectively ensures the accuracy of adjustment. The adjustment method is fast and highly accurate, which can improve the adjustment efficiency. At the same time, this adjustment method ensures the stability of the adjustment pressure by controlling the pressing degree of the active pump 2, and can prevent the backflow of arterial blood 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 precharging structure to form a variable temperature water path, so as to discharge the air in the membrane oxygenator 1 and the pipelines connected thereto. This setting can prevent air from entering the blood and flowing back into the human body to cause harm.

[0035] In step S2, the arterial pipeline includes an aortic tube 4 connected to the arterial blood outlet 17 of the membrane oxygenator 1. One end of the aortic tube 4 away from the membrane oxygenator 1 is communicated with a first branch tube 5 and a second branch tube 6. A blood filtration device 8 is communicated on the first branch tube 5. The blood filtration device 8 is communicated with the intracardiac blood inlet 16 on the membrane oxygenator 1, and 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 a liquid inlet pipe; a waste liquid pipe 7 is connected to the bottom of the microembolism filter, and the waste liquid pipe 7 is provided with a clamp. Specifically, one end of the waste liquid pipe 7 far from the blood filtration device 8 is connected to one end of the second branch pipe 6 far from the aortic pipe 4.

[0037] In the step S3, the pump pressure gauge 3 is arranged above the blood filtration device 8 through a connecting pipe 12. With such an arrangement, the variable temperature water inlet 15 at the bottom of the membrane oxygenator 1 communicating with the priming structure is located between the active pump 2 and the pump pressure gauge 3. After the pressing degree of the active pump 2 is adjusted, the pressure of the pump pressure gauge 3 is in a stable state. At this time, the variable temperature water circuit is also in a stable pressure state, and the pressure value of the pump pressure gauge 3 is also affected by the pressure of the variable temperature water circuit. When there is a leak in the variable temperature water input into the membrane oxygenator 1, the pressure value of the pump pressure gauge 3 will also change and is easily detected.

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

[0039] In summary, this method for adjusting the pressing degree of the active pump in extracorporeal circulation shows the specific pressure value when the pressing degree of the active pump 2 is adjusted through the pump pressure gauge 3, making the adjustment process and result of controlling the pressing degree of the active pump in 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 pressing degree of the active pump 2 digital and standardized, without relying on experience and feeling, effectively ensuring the accuracy of the adjustment. The adjustment method is fast and highly accurate, can improve the adjustment efficiency. At the same time, this adjustment method ensures the stability of the adjustment pressure by controlling the pressing degree of the active pump 2, and can prevent the arterial blood from flowing back due to unstable pressure.

[0040] 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 adjusting the pressing degree of an active pump in extracorporeal circulation, characterized in that, It includes the following steps: S1: Prime the membrane oxygenator (1). S2: After the priming is completed, clamp the arterial line connected to the membrane oxygenator (1), leaving only a small side line communicating with the intracardiac blood inlet (16) on the membrane oxygenator (1). S3: Install a pressure gauge (3) on the small side line in step S2 above. S4: Adjust the main pump (2) on the circulation line (10) communicating with the membrane oxygenator (1) to the required position, and adjust the compression degree of the main pump (2) on the circulation line (10). Adjust the compression degree to 150 mmHg - 250 mmHg according to the value shown by the pressure gauge (3) in step S3 above.

2. The method for adjusting the pressing degree of the main pump in extracorporeal circulation according to claim 1, characterized in that In step S2, the arterial line includes an aortic tube (4) connected to the membrane oxygenator (1). One end of the aortic tube (4) far from the membrane oxygenator (1) communicates with 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) communicates with the intracardiac blood inlet (16) on the membrane oxygenator (1). The second branch tube (6) is clamped.

3. The method for adjusting the pressing degree of the main pump in extracorporeal circulation according to claim 2, characterized in that, A waste liquid tube (7) is connected to the blood filtration device (8). The waste liquid tube (7) is clamped.

4. The method for adjusting the pressing degree of the main pump in extracorporeal circulation according to claim 3, characterized in that, One end of the waste liquid tube (7) far from the blood filtration device (8) is connected to one end of the second branch tube (6) far from the aortic tube (4).

5. The method for adjusting the pressing degree of the main pump in extracorporeal circulation according to claim 4, characterized in that, In step S3, the pressure gauge (3) is installed above the blood filtration device (8) through a connecting tube (12).

6. The method for adjusting the compression degree of the main pump in extracorporeal circulation according to claim 1, characterized in that, In step S4, the circulation line (10) 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 squeezing tube (11) connected between the circulation tube (10) and the venous tube (9). The main pump (2) is installed on the squeezing tube (11).

7. The method for adjusting the pressing degree of the main pump in extracorporeal circulation according to claim 6, characterized in that, In step S4, the pressure when the main pump (2) adjusts the compression degree of the squeezing tube (11) is 200 mmHg.

8. The method for adjusting the pressing degree of the main pump in extracorporeal circulation according to claim 1, characterized in that, In step S1, it is communicated with the priming structure through the variable temperature water inlet (15) at the bottom of the membrane oxygenator (1) to discharge the air in the membrane oxygenator (1) and the tubes connected thereto.

9. The method for adjusting the pressing degree of the main pump in extracorporeal circulation according to claim 2, wherein, The blood filter is communicated with the membrane oxygenator (1) through a liquid inlet tube.

10. The method for adjusting the compression degree of the main pump in extracorporeal circulation according to claim 2, characterized in that, The blood filtration device (8) is a microembolism filter.

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