三軸機構應用於動脈順應性測量和脈波分析

Three-axis Mechanism Application in Arterial Compliance Measurement and Pulse Waveform Analysis

謝艾芸(Ai-Yun Hsieh)

指導教授 ： 劉省宏 ； 張剛鳴

亞洲大學/資訊學院/光電與通訊學系/碩士(2009年)

摘要

近年量測生理訊號講究非侵入式的方法，以減少患者在診療時所產生的不適感。以往的脈波測量的研究中，對於量測動脈脈波沒有一套標準化的定量和程序。本篇主要是使用新型三軸脈波儀和一套標準定位程序來探測脈管的最佳位置。儀器中配備的感測器具有應變計和壓電阻，能同步的感測橈動脈直徑變化(ADCW)和脈搏波的壓力變化量。將儀器量測到的資料從x軸和z軸兩方面探討。在x軸探測過程中，觀察感測器在脈管不同的位置測量的脈搏波波形變化和其失真度。在z軸探測過程中，觀察感測器在給予脈管不同的負載壓力下測量的脈搏波波形變化和失真度，並且根據所測量到的動脈半徑變化量，提出應變式動脈順應性（Cstrain），可用來評估動脈順應性。

關鍵字

三軸脈波儀 ； 應變計 ； 形變式順應性

並列摘要

In recent years, measuring the physiological signals almost use non-invasive method to reduce the patients uncomfortable in the clinics. Previous noninvasive measurements of the pulse waveform of the radial artery have not employed standardized procedures. We propose a novel method for assessing the compliance of a radial artery using a three-axis sphygmography and a standard positioning procedure for detecting the optimal site. The sensor in the machine was designed to simultaneously measure the arterial diameter changed waveform (ADCW) and pressure waveform with strain gauge and pizeoresistor. The instrument measuring the data from the x-axis and z-axis was explored in two issues. In the X-axis scanning, the distortion degree of the pressure waveform would be analyzed for the sensor’s location at the radial artery. In the Z-axis scanning, the distortion degree of the pressure waveform would be affected by the different contact pressure. Moreover, according to the deformation of the strain gauge following the change of the vascular cross-section, the ADCW would be transferred to the change of the vascular radius. The loaded strain compliance of the radial artery ( ) can be determined as the dynamic changed radius divided by the pulse pressure.

並列關鍵字

Three-axis sphgmography ； Strain gauge ； Strain compliance

參考文獻

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