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Indiscriminate and self-adaptive physiological control method based on left ventricular assist device (LVAD)

A technology of auxiliary devices and control methods, applied in the direction of suction devices, etc., can solve problems such as lack of theoretical basis, achieve the effect of reducing experience requirements, reducing workload, and facilitating clinical use and long-term transplantation

Active Publication Date: 2019-05-24
ANHUI TONGLING BIONIC TECH CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Indiscriminate and self-adaptive physiological control method based on left ventricular assist device (LVAD)
  • Indiscriminate and self-adaptive physiological control method based on left ventricular assist device (LVAD)
  • Indiscriminate and self-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 invention provides an indiscriminate and self-adaptive physiological control method based on a left ventricular assist device (LVAD). The indiscriminate and self-adaptive physiological control method includes: measuring the preload of the left ventricle to serve as the input value of a Frank-Starling like control system so as to generate the average pump flow reference value (Qpr) and pump flow pulse reference value (Qplusr) needed by a patient; using a Savitzky-Golay (S-G) filter, an expanded Kalman filter and a low-pass filter in a single processing module to perform noise elimination onextracted pump rotation speed signals, and estimating needed average pump flow measured value (Qp) and flow pulse measured value (Qplus) at the same time; inputting the Qpr, the Qplusr, the Qp and the Qplus into a PI controller to perform processing, and using output current signals to directly control the LVAD so as to achieve expected pump rotation 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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IPC IPC(8): A61M1/12
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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