Development of low cost heart rate device for contribution rural local medical in Nakhon Phanom province Thailand

Abstract

The problem shortage of medical devices in rural Thailand, cause a budget to limit and constrain. Therefore a development the medical device with low cost as one solution. This paper proposes an improvement the heart rate device to applied in the rural local medical in Nakhon Phanom province. The hardware circuit consist the instrument amplifier, low pass filter, auto adjust zero and microcontroller processing, acquisition signal parameter of heart rate. First step the detection heart rate in the pulse signal and count the pulse in the one minute to get the beat per minute (BMP) detection pulse with a finger and measure the intensive light . The pulse signal to amplified with the instrument amplifier and send to the microcontroller. The count value of pulses per minute and show heart rate in BMP digital. Results show that compared with experimental commercial device and low cost device base on medical criterion, the average error results approximation 1.31%, it is confirm that the medical low cost device could work in the target areas.