Title :
Model-based synthetic fuzzy logic controller for indirect blood pressure measurement
Author :
Wang, Jia-Jung ; Lin, Chin-Teng ; Liu, Shing-Hong ; Wen, Zu-Chi
Author_Institution :
Dept. of Biomed. Eng., I-Shou Univ., Kaohsiung, Taiwan
fDate :
6/1/2002 12:00:00 AM
Abstract :
In this paper, a new measurement system for the noninvasive monitoring of the continuous blood pressure waveform in the radial artery is presented. The proposed system comprises a model-based fuzzy logic controller, an arterial tonometer and a micro syringe device. The flexible diaphragm tonometer registers the continuous blood pressure waveform. To obtain accurate measurement without distortion, the tonometer´s mean chamber pressure must be kept equal to the mean arterial pressure (MAP), the so-called optimal coupling condition, such that the arterial vessel has the maximum compliance. Since the MAP cannot be measured directly, to keep the optimal coupling condition becomes a tracking control problem with unknown desired trajectory. To solve this dilemma, a model-based fuzzy logic controller is designed to compensate the change of MAP by applying a counter pressure on the tonometer chamber through the micro syringe device. The proposed controller consists of a model-based predictor and a synthetic fuzzy logic controller (SFLC). The model-based predictor estimates the MAPs changing tendency based on the identified arterial pressure-volume model
Keywords :
biomedical equipment; blood pressure measurement; fuzzy control; patient monitoring; arterial pressure-volume model; arterial tonometer; compensation; flexible diaphragm tonometer; indirect blood pressure measurement; mean arterial pressure; micro syringe device; model-based fuzzy logic controller; model-based predictor; noninvasive monitoring; optimal coupling condition; radial artery; subcontrollers; tracking control; Arteries; Biomedical monitoring; Blood pressure; Distortion measurement; Fuzzy logic; Optimal control; Predictive models; Pressure control; Pressure measurement; Trajectory;
Journal_Title :
Systems, Man, and Cybernetics, Part B: Cybernetics, IEEE Transactions on
DOI :
10.1109/TSMCB.2002.999807