CN112891728A - Self-adaptive control blood pump supply system and method - Google Patents
Self-adaptive control blood pump supply system and method Download PDFInfo
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- CN112891728A CN112891728A CN202110216284.8A CN202110216284A CN112891728A CN 112891728 A CN112891728 A CN 112891728A CN 202110216284 A CN202110216284 A CN 202110216284A CN 112891728 A CN112891728 A CN 112891728A
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- pulse signal
- blood pump
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
- A61M2205/583—Means for facilitating use, e.g. by people with impaired vision by visual feedback
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2230/00—Measuring parameters of the user
- A61M2230/04—Heartbeat characteristics, e.g. ECG, blood pressure modulation
- A61M2230/06—Heartbeat rate only
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2218/00—Aspects of pattern recognition specially adapted for signal processing
- G06F2218/02—Preprocessing
- G06F2218/04—Denoising
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Abstract
本发明提供了本发明提供一种自适应控制的血泵供给方法，包括如下步骤：采集脉搏信号并对脉搏信号进行预处理；根据预处理后的脉搏信号计算心率值；根据心率值驱动伺服电机动作以调节人工血泵的流量大小；本发明不仅可以模拟病人的心脏泵血，使得体外循环的血液灌注产生符合病人本身的脉冲血流，改善大脑局部脑氧饱和度，提高人体组织的微循环，还可以根据不同病人心脏脉搏频率的不同自动调节血泵参数，使得输血过程更加符合患者自身生理特征。相应地，本发明还提供一种自适应控制的血泵供给系统。
The present invention provides an adaptively controlled blood pump supply method, comprising the following steps: collecting a pulse signal and preprocessing the pulse signal; calculating a heart rate value according to the preprocessed pulse signal; driving a servo motor according to the heart rate value action to adjust the flow rate of the artificial blood pump; the invention can not only simulate the patient's heart pumping, but also make the blood perfusion of the extracorporeal circulation generate pulse blood flow in line with the patient's own, improve the local cerebral oxygen saturation of the brain, and improve the microcirculation of human tissue It can also automatically adjust the blood pump parameters according to the different heart pulse rates of different patients, so that the blood transfusion process is more in line with the patient's own physiological characteristics. Correspondingly, the present invention also provides an adaptively controlled blood pump supply system.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a blood pump supply system and method with adaptive control.
Background
In the process of rescuing critical patients or performing surgery on patients, blood transfusion is often required for the patients. The artificial blood pump is used as a clinical operation medical instrument, and has an irreplaceable function in blood transfusion when assisting a doctor to perform an operation on a patient. The pulsating artificial blood pump accords with the physiological characteristics of a human body, can conveniently adjust the pulsation frequency of blood flow and the blood pumping amount of each pulsation period by controlling the rotating speed of the motor, generates pulse blood flow, and reduces the injury of organs and tissues of the human body caused by the advection perfusion of the blood which circulates outside the human body.
However, the existing pulsating artificial blood pump cannot automatically adjust the parameters of the blood pump according to different heart pulse frequencies of different patients, and needs to be improved.
Disclosure of Invention
Based on the above, in order to solve the problem that the existing pulsating artificial blood pump cannot automatically adjust the parameters of the blood pump according to different heart pulse frequencies of different patients, the invention provides a self-adaptive control blood pump supply system and a self-adaptive control blood pump supply method, and the specific technical scheme is as follows:
a blood pump supply system with self-adaptive control comprises a pulse signal acquisition module, a pulse signal processing module and a pulse signal control module.
The pulse signal acquisition module is used for acquiring pulse signals and preprocessing the pulse signals, the pulse signal processing module is used for calculating a heart rate value according to the preprocessed pulse signals, and the pulse signal control module is used for driving a servo motor to act according to the heart rate value so as to adjust the flow of the artificial blood pump.
The servo motor is in transmission connection with the artificial blood pump.
According to the self-adaptive control blood pump supply system, the pulse signals are collected, the heart rate value is calculated according to the pulse signals, then the servo motor is driven to act according to the heart rate value so as to adjust the flow of the artificial blood pump, not only can the heart pumping of a patient be simulated, but also the pulse blood flow which accords with the patient per se is generated by the blood perfusion of extracorporeal circulation, the local cerebral oxygen saturation of the brain is improved, the microcirculation of human tissues is improved, the blood pump parameters can be automatically adjusted according to different heart pulse frequencies of different patients, and the blood transfusion process can accord with the physiological characteristics of the patient per se.
Furthermore, the pulse signal acquisition module comprises an amplifying circuit and a filter, wherein the amplifying circuit is used for amplifying the pulse signal, and the filter is used for filtering the pulse signal after amplification.
Further, the pulse signal acquisition module further comprises a photoelectric pulse sensor, and the photoelectric pulse sensor is used for acquiring pulse signals.
Furthermore, the pulse signal control module comprises a digital-to-analog conversion circuit, and an input end of the digital-to-analog conversion circuit is electrically connected with an output end of the pulse signal processing module.
Further, the filter is a low pass filter.
Further, the cut-off frequency of the low-pass filter is 40 Hz.
Correspondingly, the invention provides a blood pump supply method with adaptive control, which comprises the following steps:
collecting pulse signals and preprocessing the pulse signals;
calculating a heart rate value according to the preprocessed pulse signals;
driving a servo motor to act according to the heart rate value so as to adjust the flow of the artificial blood pump;
the servo motor is in transmission connection with the artificial blood pump.
Further, the specific method for preprocessing the pulse signal comprises the following steps:
amplifying the pulse signal;
and carrying out filtering processing on the pulse signals after the amplification processing.
Further, the amplified pulse signal is filtered by a low-pass filter.
Further, the cut-off frequency of the low-pass filter is 40 Hz.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
Fig. 1 is a schematic flow chart of an adaptive control blood pump supply system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.
In an embodiment of the present invention, a blood pump supply system with adaptive control includes a pulse signal acquisition module, a pulse signal processing module, and a pulse signal control module.
The pulse signal acquisition module is used for acquiring pulse signals and preprocessing the pulse signals, the pulse signal processing module is used for calculating a heart rate value according to the preprocessed pulse signals, and the pulse signal control module is used for driving a servo motor to act according to the heart rate value so as to adjust the flow of the artificial blood pump.
The servo motor is in transmission connection with the artificial blood pump.
According to the self-adaptive control blood pump supply system, the pulse signal is acquired through the pulse signal acquisition module, the heart rate value is calculated through the pulse signal processing module, then the pulse signal control module drives the servo motor to act according to the heart rate value so as to adjust the flow of the artificial blood pump, the heart pumping of a patient can be simulated, the blood perfusion of extracorporeal circulation generates pulse blood flow which accords with the patient, the local cerebral oxygen saturation of the brain is improved, the microcirculation of human tissues is improved, blood pump parameters can be automatically adjusted according to different heart pulse frequencies of different patients, and the blood transfusion process accords with the physiological characteristics of the patient.
In one embodiment, the pulse signal acquisition module includes an amplifying circuit and a filter, the amplifying circuit is configured to amplify the pulse signal, and the filter is configured to filter the amplified pulse signal.
In one embodiment, the pulse signal acquisition module further comprises a photoelectric pulse sensor for acquiring pulse signals.
The photoelectric pulse sensor is used for acquiring pulse signals, and the pulse signals can well reflect the time relation of heart rate and better calculate the heart rate value of a patient.
In one embodiment, the pulse signal control module includes a digital-to-analog conversion circuit, and an input end of the digital-to-analog conversion circuit is electrically connected with an output end of the pulse signal processing module.
In one embodiment, the filter is a low pass filter with a cut-off frequency of 40 Hz. The low-pass filter can filter out the power frequency interference of the false signals caused by the shaking of the human body and the mental stress.
In one embodiment, the adaptively controlled blood pump supply system further comprises an LCD display screen, the pulse signal processing module comprises a controller, the LCD display screen is electrically connected with the controller, and the controller comprises an analog-to-digital converter, and an input end of the analog-to-digital converter is electrically connected with an output end of the filter. The preprocessed pulse signals are processed and analyzed through the analog-to-digital converter, and the processed and analyzed results are displayed through the LCD screen, so that reference help can be provided for diagnosis of doctors.
Specifically, the controller is a single chip microcomputer.
The principle of calculating the heart rate value according to the preprocessed pulse signals is as follows: sampling the pulse signals of the patient for ten times, collecting the pulse signals twice in each sampling, calculating the time interval of the pulse signals twice in each sampling, calculating the average value of the time intervals of the ten sampling, and calculating the heart rate value according to the average value.
In one embodiment, as shown in fig. 1, the present invention provides an adaptively controlled blood pump feeding method, comprising the steps of:
collecting pulse signals and preprocessing the pulse signals;
calculating a heart rate value according to the preprocessed pulse signals;
driving a servo motor to act according to the heart rate value so as to adjust the flow of the artificial blood pump;
the servo motor is in transmission connection with the artificial blood pump.
According to the blood pump supply method with the self-adaptive control, the pulse signals are collected, the heart rate value is calculated according to the pulse signals, and then the servo motor is driven to act according to the heart rate value so as to adjust the flow of the artificial blood pump, so that the heart pumping of a patient can be simulated, the pulse blood flow which accords with the patient per se is generated by the blood perfusion of extracorporeal circulation, the local cerebral oxygen saturation of the brain is improved, the microcirculation of human tissues is improved, the parameters of the blood pump can be automatically adjusted according to different heart pulse frequencies of different patients, and the blood transfusion process can better accord with the physiological characteristics of the patient per se.
Because the servo motor is very accurate in speed and position control precision, a voltage signal can be converted into a torque and a rotating speed to drive a control object, and the rotating speed of a rotor of the servo motor is controlled by an input signal, so that the servo motor can quickly respond. In an automatic control system, a servo motor is used as an actuator, has the characteristics of small electromechanical time constant, high linearity and the like, and can convert a received electric signal into an angular displacement or an angular velocity on a motor shaft for output. Therefore, the servo motor drives the artificial blood pump, and the blood transfusion flow can be better controlled.
In one embodiment, the specific method for preprocessing the pulse signal includes the following steps:
amplifying the pulse signal;
and carrying out filtering processing on the pulse signals after the amplification processing.
In one embodiment, the amplified pulse signal is filtered by a low-pass filter, and the cut-off frequency of the low-pass filter is 40 Hz.
The pulse signals are amplified and filtered, so that interference noise can be filtered.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
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| CN202110216284.8A CN112891728A (en) | 2021-02-26 | 2021-02-26 | Self-adaptive control blood pump supply system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116650827A (en) * | 2023-06-21 | 2023-08-29 | 西安交通大学 | Flow Pulsatility Control System of ECMO Centrifugal Blood Pump Based on RBF Neural Network |
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Application publication date: 20210604 |