Cuffless Blood Pressure in clinical practice: challenges, opportunities and current limits.

Towards ultrasound wearable technology for cardiovascular monitoring: from device development to clinical validation

“…Due to the low penetration of PPG, this technology is very sensitive to body characteristics (skin temperature and tone, and body max index). That means that individual calibration for each person is required to obtain accurate measurements with PPG, which is tedious [23].…”