1, the definition of different: active medical devices are devices that require the use of electricity, gas and other drive, rather than directly by the human body or gravity to produce energy to play its function. Passive medical devices are medical devices that do not rely on any electrical or other energy sources, but are directly generated by the human body or gravity to play its functions.
2, the working principle is different: active medical devices is the most important feature is the need to use electricity as a condition of the effective work of the device. Passive medical devices do not need power.