Physiological Parameter Monitoring from Optical Recordings With a Mobile Phone

Abstract

We show that a mobile phone can serve as an accurate monitor for several physiological variables, based on its ability to record and analyze the varying color signals of a fingertip placed in contact with its optical sensor. We confirm the accuracy of measurements of breathing rate, cardiac R-R intervals, and blood oxygen saturation, by comparisons to standard methods for making such measurements (respiration belts, ECGs, and pulse-oximeters, respectively). Measurement of respiratory rate uses a previously reported algorithm developed for use with a pulse-oximeter, based on amplitude and frequency modulation sequences within the light signal. We note that this technology can also be used with recently developed algorithms for detection of atrial fibrillation or blood loss.

Automatic recognition of physiological parameters in the human voice: Heart rate and skin conductance

“…Poh et al [1] show that heart rate, breath rate and heart rate variability can be determined by a laptop's built-in video camera with great accuracy. Scully et al [2] use the video of a subject's finger resting on a mobile phone's camera lens to extract heart rate, heart rate variability, breathing rate and blood oxygen saturation. There are several applications for mobile phones performing video-based heart rate and breath rate recognition on the market right now, based on a webcam as well as based on a mobile phone's camera.…”

iPhysioMeter: A new approach for measuring heart rate and normalized pulse volume using only a smartphone

“…In addition to allowing for convenient mobile communication, the smartphone's processing power offers the possibility of measuring physiological indices using only the commercially available device itself (Jonathan & Leahy, 2010, 2011Scully et al, 2012). By using the lightemitting diode (LED) of the inbuilt flash as a light source and the complementary metal oxide semiconductor (CMOS) camera as a light sensor, the smartphone can be configured as a photo-plethysmograph (PPG) and, among other things, can then be used as a pulse wave recorder.…”

Real-time Heart Rate Measurement based on Photoplethysmography using Android Smartphone Camera

“…Another approach is replacing the photodiode, used in pulse oximeter, by a smartphone camera that enables PPG imaging as shown in Fig. 1 [2]. While it is easy to position on the finger, pulse oximeters are somewhat obtrusive and impractical for intermittent use throughout the day, smartphones are so much more portable and practical.…”