Non-invasive blood pressure measurement from the finger using an optical system based on dynamic light scattering

This paper review presents the results of a Novel method for non-invasive blood pressure measurement from the finger using an optical system based on dynamic light scattering developed by Elfi-Tech's innovative technology group [1].
A small-scaled, optical, mobile device that measures BP at the finger using dynamic light scattering was developed. The device is positioned at the base of the index finger and contains a ring with an inflatable cuff with two miniaturized dynamic light scattering (mDLS) sensors situated away from, but close to the cuff. The cuff is inflated to above systolic pressure, and changes in blood flow (hemodynamics) are measured during deflation of the cuff.
Blood Pressure measurement is carried out using specially designed algorithms based on hemodynamic indexes and waveform analysis which capture systolic and diastolic points in real-time.