https://scholars.lib.ntu.edu.tw/handle/123456789/202767
標題: | Pain Model and Fuzzy Logic Patient-Controlled Analgesia in Shock Wave Lithotripsy | 作者: | SUN, WEI-ZEN | 關鍵字: | pain model;pain intensity scale;patient-controlled analgesia;fuzzy logic control;extracorporeal shock-wave lithotripsy;INDUCED NEUROMUSCULAR BLOCK | 公開日期: | 2002 | 卷: | v.40 | 期: | n.1 | 起(迄)頁: | 128-136 | 來源出版物: | MEDICAL AND BIOLOGICAL ENGINEERING AND COMPUTING | 摘要: | Pain control in conscious patients was investigated using a push-button, demand-driven supply of drugs. A fuzzy logic patient-controlled analgesia (PCA) algorithm was compared with a conventional algorithm, for alfentanil administration in extracorporeal shock-wave lithotripsy. The conventional PCA algorithm used an initial dose of 0.25 mg, a fixed infusion rate of 60 mg h(-1) and a fixed bolus size of 0.2 mg with a 1 min lockout The fuzzy logic PCA algorithm used an initial dose of 0.25 mg, a changeable infusion rate and a bolus size of 0.1 or 0.05 mg. The infusion rate was adjusted according to a look-up table that accepted the button-pressing history over the last three lockout intervals. The look-up table was designed using fuzzy logic. The bolus size was adjusted according to the button- pressing history over the past two lockout intervals. Twelve patients were treated using conventional PCA, and thirteen were treated with PCA + fuzzy logic control (FLC). PCA + FLC patients consumed 45% less drug. Also, PCA + FLC patients had a mean delivery/demand ratio of 82%, compared with 60% in conventional PCA. When the pain intensity scale was analysed, PCA + FLC patients had acceptable pain intensity at 62%, compared with 44% in conventional PCA. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/99214 |
顯示於: | 醫學系 |
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