Sensors In Medicine

Sensors are devices that detect physical, chemical, and biological signals and provide a way for those signals to be measured and recorded. Physical properties that can be sensed include temperature, pressure, vibration, sound level, light intensity, load or weight, flow rate of gases and liquids, amplitude of magnetic and electronic fields, and concentrations of many substances in gaseous, liquid, or solid form. Although sensor of today are where computers were in 1970 medical applications of sensors are taking off because of advances in microchip technologies and molecular chemistry.

Sensors have played an important role in many industries, providing the mechanical “vision” used for counting, sorting, reading, and robotic guidance. Tactile sensor, typically piezoelectric materials, generate voltage when touched, squeezed, or bent, or when their temperature is changed. Other sensor can detect specific chemical pressures and fluid levels. Cars, homes, and offices are loaded with sensor. In the short term, sensor 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 locations. Advances in microprocessor technologies have created a smart sensor that unites sensing capability and data processing in a single integrated circuit chip. The next step is combining sensing and processing with an actuator, such as microelectromechanical systems.

Summary Points

Sensors are all around us
Now sensors are moving into health care
Leading the way are sensors for the monitoring of glucose and vital signs
Sensor will change the site of health care
Smart sensor will initiate an appropriate response, including treatment

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