Aiming at defects of health monitoring end devices at present

a portable multi-physiological parameter monitoring end device is designed. Control and signal processing functions are realized through ARM microprocessor STM32F405; information such as pulse rate

respiratory rate

surplus pulse O

2

（ SPO

2

） pulse transmission time（ PTT）

electrocardiogram（ ECG）

photoplethysmography（ PPG） can be obtained by real time processing and analyzing signal acquired by sensors; physiological parameters and waveforms can be displayed in real-time; man-machine interactive function can be realized through touch screen; hand-held and wearable measurement modes can be freely switched as needed. Measurement data can be saved locally or wirelessly sent thro

ugh Bluetooth or Zig Bee. Experiments show that physiological parameters measured by the end device are accurate and reliable.