A sensor is a device that detect and responds to some type input from the physical environment. The specific output could be light, motion, heat, moisture, pressure or any one of a great number of other environmental phenomena. The output is generally a signal that is converted to human readable display at the sensor location or transmitted electronically over a network for reading or further processing. Sensors play an ever more important role in medical technology with the aim of making medical devices even more effective and safer, while simplifying their operation. Today medical devices rely on sensors to aid in accurate monitoring, diagnosis and treatment. Sensors used in medical applications will emit a signal that can be read at the point of determination or transferred by wire or wireless transmission to remote location. In Medical World, there is a broadening intersection between Information Technology and Biotechnology and increasingly the role of sensors, signal transducers etc. Some examples of new generation medical sensors indicate new roles that these devices will have many areas of health care are;
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