JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

UNIT - I

Introduction: Classification, Basic requirements of bio transducers, Quasi state effects (linearity, Hysteresis), Amplitude distortion, Phase distortion, Sampling errors, Input and Output impedance effects, Factors influencing the choice and design of the transducer in Measuring the Physiological Parameters. Temperature Transducers (Measurement Principle, Design and Applications): Thermo resistive, Thermo electric, PN junction diode- Thermometers, frequency change temperature Transducers, Chemical Thermometry, Radiation Thermometry.

UNIT - II

Displacement, Transducers: Potentiometric Transducers: Resistive, Resistive strain gauges. LVDT, Inductive displacement transducer, capacitive displacement transducers, Ultrasonic methods. Force & Velocity Transducers: Differentiation and Integration methods, Doppler system, Methods based on the mass bauer effect, Electromagnetic methods. Acceleration transducers: Piezo electric transducers

UNIT - III

Pressure Transducers: Occlusive cuff methods. Force balance methods. Direct hydraulically coupled Catheter transducer system, Diaphragm displacement pressure transducers. Electrical transduction methods for Catheter tip transducer. Optical transducers. Implantable pressure transducer, Micro pressure transducer.

UNIT - IV

Flow Transducers: Flow probe design and application: Catheter tip electromagnetic Intra vascular probe & electronic system. Doppler shift flow meters, Pressure gradient technique, Intra vascular Thermistor probe, Water filled plethysmography, Air filled plethysmography, Fick & Rapid injection indicator dilution methods.

UNIT - V

Biotelemetry: Radio Telemetry principles, FM, AM, PCM. Transmission of biological data through radio telemetry. Single channel, multi-channel systems. Block diagrams and functions of bio signal transmitters and receivers.

TEXT BOOKS:

• 1. L. A Geddes, L. E. Baker, Principles of Applied Biomedical Instrumentation, John Wiley India.
• 2. Tatsuo Togawa, Toshiyo Tamura & P, Ake Oberg, Biomedical Transducers and Instruments, CRC Press, Boca Raton, 1997.
• 3. Introduction to Measurements and Instrumentation, second edition, Arun K Ghosh, PHI, New Delhi 2007

REFERENCE BOOKS:

• 1. Richard. S. C. Cobbold; Transducers for Biomedical Measurements- principles and application; Krieger pub Co,
• 2. John Webster. Medical Instrumentation. - Application and Design. John Wiley and Sons. Inc., New York. Third edition 2003.