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An indiscriminate adaptive physiological control method based on left ventricular assist device lvad

An auxiliary device and left ventricular technology, applied in the direction of control devices, blood pumps, etc., can solve problems such as lack of theoretical basis, achieve the effect of reducing experience requirements, reducing complications, and reducing workload

Active Publication Date: 2021-10-08
ANHUI TONGLING BIONIC TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The PR control strategy has the same deficiencies as the study of Gaddum et al. Although they can effectively assist heart failure patients to pump blood to meet normal physiological needs, they do not refer to relevant clinical data for parameter setting, and lack corresponding theoretical basis. conduct in-depth research

Method used

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  • An indiscriminate adaptive physiological control method based on left ventricular assist device lvad
  • An indiscriminate adaptive physiological control method based on left ventricular assist device lvad
  • An indiscriminate adaptive physiological control method based on left ventricular assist device lvad

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Embodiment Construction

[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings, but in any case the detailed description should not be construed as limiting the present invention.

[0039] Such as figure 1 The control method shown is composed of three modules: (1) Frank-Starling like control system; (2) signal processing system; (3) PI controller for adjusting the speed. These three modules interact with each other, imitating the traditional Frank-Starling control system, establishing a Frank-Starling like control system, based on this control system to provide patients with appropriate reference values ​​without distinction. The pump speed signal is processed based on various filters and algorithms, and the error between the reference value and the actual measured value is tracked based on the PI controller to achieve the desired pump speed.

[0040] Step 1, based on the Frank-Starling like control system to gradually track the reference...

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Abstract

The present invention provides a non-differential self-adaptive physiological control method based on the left ventricular assist device LVAD. Firstly, by measuring the preload (Preload) from the left ventricle and using it as the input value of the Frank-Starling like control system, the patient The reference value of the desired average pump flow () and the reference value of the pulsation value of the pump flow (Q plusr ). In the next step, the Savitzky-Golay (S-G) filter is used in the signal processing module, and the Kalman filter and low-pass filter are extended to denoise the extracted pump speed signal and estimate the required average pump speed. The measured value of the flow () and the measured value of the pulsation of the flow (Q plus ). last Q plusr with Q plusr Input the PI controller for processing, and the output current signal directly controls the LVAD to achieve the desired pump speed.

Description

technical field [0001] The invention relates to a medical device and a design method, in particular to a physiological control method for controlling an artificial heart and meeting the hemodynamic requirements of a human body. Background technique [0002] According to the survey by the National Cardiovascular Center, in 2017, the mortality rate of patients with cardiovascular disease in my country is still the first cause of death among urban and rural residents, with 45.01% in rural areas and 42.61% in urban areas. Heart failure (Heart Failure, HF), also known as heart failure, is the end stage of various cardiovascular diseases. It usually refers to the failure of the natural heart function to discharge the venous return blood from the heart, resulting in blood stasis in the venous system and arterial system. Insufficient blood supply, which causes cardiac circulation obstruction. Due to the shortage of heart donors, left ventricular assist device (LVAD) has gradually b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M60/508A61M60/538A61M60/122
Inventor 王芳群祝颖菲贺万堑石巍张瑶何汉
Owner ANHUI TONGLING BIONIC TECH CO LTD
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