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題名 | Modeling the Arterial Unloaded Situation in Oscillometric Blood Pressure Waveform Measurement Using Fuzzy Logic Control=以模糊邏輯控制來模擬共振式血壓波形量測中之動脈無負載的狀態 |
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作者 | 王家鍾; 劉省宏; 林進登; 謝瑞香; Wang, Jia-jung; Liu, Shing-hong; Lin, Chin-teng; Hsieh, Jui-hsaing; |
期刊 | Journal of Medical and Biological Engineering |
出版日期 | 20010600 |
卷期 | 21:2 2001.06[民90.06] |
頁次 | 頁93-104 |
分類號 | 410.1644 |
語文 | eng |
關鍵詞 | 血壓; 模糊邏輯控制; 平均動脈壓; 壓張計; 共振技術; 血壓波形; Blood pressure; Fuzzy logical control; Mean arterial pressure; Tonometer; Oscillometry; Pressure waveform; |
中文摘要 | 唯有當動脈血管內外的壓力差為零時,才能以非侵入方式準確地測出連續血壓波形,意謂著量測時動脈血管必須處於無負載的狀態。在本研究中,我們利用一合成式模糊邏輯控制器來模擬血管性的無負載狀況。首先,為了推導出靜態動脈血管血壓與體積間的關系,我們利用自行開發的動脈壓張計,來同時擷取九位受測者的血壓波形及其血管體積的變化。從所蒐集實驗數據的分析中,得知血管壓力與體積間存在著-Gaussian的關係,再根據此種關係,我們將所提出的合成式模糊邏輯控制器分為上升,下降,及穩態等三個次控制器,以便緊密追蹤時變的平均動脈血壓。由模擬結果顯示,在假設平均動脈血壓的變化速率為每分鐘34個毫米汞柱高時,所提出的模糊控制器能夠及時改變壓張計的腔壓以跟隨平均動脈血壓的變動,而平均動脈血壓和腔壓間的估測平均誤差小於0.04個毫米汞柱高。故,本研究所提出的合成式模糊邏輯控制器可成功地追蹤變化的平均動脈血壓,又由模擬結果可推論得出,一含有合成式糊模控制架構的血壓波形測量裝置,極有可能達到真正的血管性無負載的狀況。 |
英文摘要 | Continuous blood pressure waveform can be accurately and non-invasively monitored only when the transmural pressure of the artery becomes zero, implying that the artery is under an unloaded condition. In this study, we incorporated a synthetic fuzzy logical controller (SFLC) to model that vascular unloaded situation. To derive a static arterial pressure-volume relationship, nine subjects with normotension were recruited and their arterial blood pressure waveforms and changes in the vessel volume were simultaneously sensed using an experimenter-devised arterial tonometer. A Gaussian relationship between the arterial pressure and volume was obtained with the pooled data. According to the relationship, we developed an SFLC that consisted of the ascending, descending and stabilizing subcontrollers. Through the SFLC, we can closely track the time-varying mean arterial pressure (MAP). Modeling results showed that assuming a MAP with a changing rate of 34 mm Hg/minute, the proposed SFLC was capable of in time changing the tonometer's chamber pressure, and the estimated mean error between the MAP and chamber pressure was less than 0.04 mm Hg. In conclusion, the current SFLC can be employed to successfully track the variant MAP. Also, the modeling outcome suggests that the vascular unloaded condition may be approached by a pressure waveform measurement apparatus which contains an SFLC structure. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。