The MESI mTABLET TBI is intended to measure Toe-Brachial Index by performing non-invasive, plethysmography-oscillometric measurements of systolic brachial blood pressures and photoplethysmographic (PPG) measurements of systolic toe blood pressures. The Toe-Brachial Index result PPG waveforms, pulse wave and oscillation graph are captured and displayed as a numerical and graphical representation on the MESI mTABLET UNIT.