Optimizing Non-Invasive Arterial Monitoring with Monte Carlo Simulations

Short wavelength infrared (SWIR) optical measurements may enhance non-invasive arterial monitoring technology. This technology could enable continuous monitoring of blood properties such as hematocrit and hydration. Our research group has developed a miniaturized SWIR spectrometer with the goal of non-invasive arterial blood monitoring on the wrist. Understanding the transport of SWIR light to and from the artery could be enabling for this technology. Utilizing Monte Carlo simulation techniques, we modeled how infrared light from a light source will propagate into, and out of, the wrist. Using the data collected, we found that the signal-to-shot-noise ratio is maximized when the device's light source and detector are 4mm apart and straddling the radial artery.