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Method for determining peripheral pressure wave delay time in reconstruction of central arterial pressure

A technology of central arterial pressure and delay time, applied in cardiac catheterization, medical science, auscultation equipment, etc., can solve the problems of large delay time difference and unstable accuracy, and achieve the effect of small error and ideal reconstruction results

Inactive Publication Date: 2015-03-18
BEIHANG UNIV
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Problems solved by technology

However, in the prior art, the delay time is mostly obtained through computer simulation, and sometimes the obtained delay time is very different from the actual result, and the accuracy is not stable, so that there is a relatively large uncertainty in the actual central arterial pressure reconstruction and error

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  • Method for determining peripheral pressure wave delay time in reconstruction of central arterial pressure
  • Method for determining peripheral pressure wave delay time in reconstruction of central arterial pressure
  • Method for determining peripheral pressure wave delay time in reconstruction of central arterial pressure

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Embodiment Construction

[0018] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0019] The actual delay time requires invasive simultaneous measurements of central and peripheral arterial pressure waves to be calculated. At present, the existing technology only points out that the delay time can be obtained non-invasively through the electrocardiogram (ECG) or heart sound (phonocardiogram, PCG) signal, but which signal is used to obtain the delay time, and the relationship between the delay time obtained by using this signal and The error of the actual delay time is unknown. Therefore, in actual experiments, computer simulation is still used to obtain the delay time, but sometimes the obtained delay time is very different from the actual result, and the accuracy is unstable.

[0020] The delay time determined by applying the ECG signal is Δt ECG , the determination method is: synchronously measure the ECG signal and the peripher...

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Abstract

The invention provides a method for determining peripheral pressure wave delay time in reconstruction of central arterial pressure. The method is used for reconstruction of central arterial pressure and includes the steps: synchronously measuring heart sound signals and peripheral pressure waves; determining delay time of pressure wave transmission from the center artery to the peripheral artery by taking time of aortic valve close component of a cardiac sound II as a starting point and taking an incision position of the peripheral pressure waves as a terminal point, wherein time of the aortic valve close component of the cardiac sound II is obtained by adopting short-time Fourier transform for processing phonocardiogram signals. In practical reconstruction of central arterial pressure, the method can be directly adopted for non-invasively determining delay time, and low result error and effectiveness in reconstruction can be achieved.

Description

technical field [0001] The invention belongs to the technical field of obtaining medical parameters, in particular to a method for determining the delay time of peripheral pressure waves in central arterial pressure reconstruction. Background technique [0002] In recent years, studies have shown that hemodynamic changes in central arteries are independently related to target organ damage and cardiovascular disease, and central arterial pressure (that is, the blood pressure at the root of the ascending aorta) has more measurement value than peripheral blood pressure. There are two main methods for reconstructing central arterial pressure in a non-invasive way, one is to reconstruct based on the average transfer function; the other is to reconstruct by applying an individualized transfer function. [0003] The reconstruction results of the average transfer function can be used to obtain more accurate mean blood pressure (MBP) and diastolic blood pressure (DBP), but the pressu...

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Application Information

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IPC IPC(8): A61B7/00A61B5/021
Inventor 于丹洋俞梦孙向海燕
Owner BEIHANG UNIV
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