頁籤選單縮合
題 名 | Development of an Arterial Applanation Tonometer for Detecting Arterial Blood Pressure and Volume |
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作 者 | Wang,Jia-jung; Liu,Shing-hong; Chern,Ching-iuan; Hsieh,Jui-hsaing; | 書刊名 | 醫學工程 |
卷 期 | 16:6 2004.12[民93.12] |
頁 次 | 頁322-330 |
分類號 | 410.1644 |
關鍵詞 | Arterial tonometer; Blood pressure; Flexible diphragm; Compliance; Radial artery; Pressure measurement; |
語 文 | 英文(English) |
英文摘要 | Traditional arterial tonometry permits noninvasive and continuous recording of the arterial pressure waveform, by applanating a superficial artery supported by a bone. In the paper, we present an arterial tonometer to simultaneously register the blood pressure waveform and the arterial time-varying volume. The tonometer consisted mainly of a chamber filed with a conductive fluid, a flexible diaphragm in touch with an artery, and a pressure sensor sued to detect the underlying arterial pressure. In addition, four electrodes were in parallel disposed in the chamber, two of them were triggered with a constant-current source, and the voltage difference between the other two inner electrodes was associated with the amount of change in the arterial volume. The pressure calibration curve performed with a mercury sphygmomanometer showed a fairly linear relationship (r = 0.998) between the tonometer’s chamber pressure and the voltage output of the pressure-sensing circuit. The volume calibration was carried out with vessel-like cylinders of various diameters and a linear relationship (r = 0.884) of the change in vessel volume to the voltage output of the volume-sensing circuit was obtained. Clinical testing results revealed that the noninvasive blood pressure measurement with the tonometer was appreciably consistent with the invasive measurement with the catheter-tipped pressure transducer. In summary, the arterial applanation tonometer developed may be used to reliably determine the full arterial blood pressure waveform and the change in the arterial volume, and to make the wall compliance assessment of a superficial artery possible. |
本系統中英文摘要資訊取自各篇刊載內容。