Patient monitoring is always highly important in any emergency and operating room, as it has already proven its reliability in recovery rooms and during respiratory therapy, transportation and out-patient care, ambulatory and gastroenterology departments, sleep screening applications and at home.
The very first primitive patient monitoring began in 1625 with the work done by Santorio. It was measuring blood pressure and body temperature. The new technology developed after the World War 2. As for now, there is a vast number of different monitoring types.
Basically, a patient monitor consists of an analog front end, sensors, a human-machine interface, a processor, memory, power supply and communication interface circuits.