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Detector methods and apparatus of cardiovascular system combining with variability guideline

A detection method and technology of detection device, which are applied in the directions of diagnostic recording/measurement, medical science, diagnosis, etc., can solve the problems of gaps in the variability analysis of the cardiovascular system, sensitivity to external noise, and low specificity of results.

Inactive Publication Date: 2008-05-14
SHANDONG UNIV
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Problems solved by technology

Since the linear analysis method does not conform to the fact that the cardiovascular system itself is a nonlinear system, the specificity of the analysis results is relatively low and it is sensitive to external noise
The scatter diagram analysis method mainly relies on the naked eye observation of doctors to obtain some qualitative or semi-quantitative indicators. The physical meaning of the indicators is not very clear, and it is difficult to make an accurate diagnosis.
Other nonlinear analysis methods have shown their theoretical value from different aspects, but there is still a gap in the variability analysis of clinical short-term cardiovascular system

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  • Detector methods and apparatus of cardiovascular system combining with variability guideline
  • Detector methods and apparatus of cardiovascular system combining with variability guideline
  • Detector methods and apparatus of cardiovascular system combining with variability guideline

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Embodiment Construction

[0059] Fig. 1 shows the flow chart of the method for detecting the combined cardiovascular variability index AV of the present invention. First, in the same cardiac cycle, the ECG, heart sounds, and radial pulse signals of the subject are collected synchronously, and the three-way signals are filtered, denoised, amplified, and analog-to-digital converted to form the signal waveform shown in Figure 2. From top to bottom in Fig. 2 are electrocardiogram signal, heart sound signal, radial artery pulse signal successively, and marked P wave, QRS wave group and T wave of electrocardiogram signal on the figure, the first heart sound of heart sound signal ( The mitral valve closing component (A1) of S1), the aortic valve closing component (A2) of the second heart sound (S2), the pulse starting point u and the dicrotic wave notch point In of the radial artery pulse signal, and the above marked points are taken as The characteristic points of the signal. Each signal waveform is collect...

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Abstract

The invention relates to a combined variability index testing method of cardiovascular system and the testing device. The testing method comprises the following steps: (1) collecting the electrocardio-signal, the phonocardio-signal and the pulse signal of radial artery; (2) performing analog-to-digital conversion to the three signals to form the signal oscillogram; (3) identifying and extracting the characteristic point of each signal; (4) constructing the time series RR of electrocardio-period, the electromechanical delay time series and the pulse wave propagation time series of the combined variability index; (5) testing the validity of each time series; (6) calculating the heart rate variability, the electromechanical delay variability and the pulse wave propagation time variability; and (7) calculating the combined variability index of angiocarpy AV. The testing device comprises an electrocardio-signal testing module, a phonocardio-signal testing module, radial artery pulse signal testing module, an analog-to-digital converting device and a computer. The invention enables to reflect the physiological and pathological status of the human cardiovascular system well and has the advantages of high discriminating degree and wide clinic application value.

Description

technical field [0001] The invention relates to a method and device for detecting the combined variability index AV of the human cardiovascular system, in particular to a method and a device for non-invasive detection of the functional state of the cardiovascular system of the human body, belonging to the technical field of detection of the functional state of the cardiovascular system. Background technique [0002] The human cardiovascular system is a complex nonlinear system, in which many signals such as ECG, heart sound, and pulse signals contain rich nonlinear dynamic information. The amount of nonlinear dynamic information is closely related to the functional state of the human cardiovascular system, and at the same time reflects the regulation function of the autonomic nervous system on the cardiovascular system, and also reflects the interaction between respiratory factors, humoral factors, etc. and the cardiovascular system. [0003] The variability of the cardiovas...

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Application Information

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IPC IPC(8): A61B5/0205G06F17/00
Inventor 刘常春刘澄玉王新沛孙欣朱其刚徐胜鹤
Owner SHANDONG UNIV
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