BME 314 Lecture 18 2010

BME 314 Lecture 18 2010 - BiomedicalSensorsI Krish Roy,...

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Biomedical Sensors I Krish Roy, Ph.D. Associate Professor Dept. of Biomedical Engineering
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Learning objectives At the end of this lecture you should be able to: Explain what are biomedical sensors/biosensors Define and discuss sensitivity, specificity and linearity in sensors List the different types of sensors Define what is a transducer Explain the functioning of an electrode Discuss and explain the functioning of a Clark electrode for glucose sensing
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What are biomedical sensors Sensing and indicating biological and medical variables Integrated with instrumentation Using chemical, physical or electrical signals Chemical signals, e.g. pH, glucose, oxygen Electrical signals, e.g. ECG, EMG, EEG Physical signals, e.g. flow rates, pressure
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Transducer Component of a sensor that converts (translates) one type of energy (signal) to another type (indication) E.g.: Change in glucose concentration to an electrical signal Change in pressure to electrical signal Change in displacement or pressure to an optical signal etc.
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BME 314 Lecture 18 2010 - BiomedicalSensorsI Krish Roy,...

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