fig10

Figure 10. (A) Schematic of the blood pressure monitoring system (a), Grid sensing area on the wrist and arterial pulse signals collected by sensors from different sites (b), typical pulse wave signals with features defined (c), and estimation process of the blood pressure(d)^[155]. Copyright 2023, Springer Nature; (B) Strain tests of LGPs with the strain values ranging from 0% to 50% (a), IR image of LGP embedded with a AgNW heater (b), design schematic of stretchable pulsed oximetry (c), and PPG signal was acquired using μ-LEDs with 630 and 850 nm (d)^[50]. Copyright 2020, American Chemical Society; (C) Schematic representation of the proposed flexible photonic interferometer (a and b), analysis of bi-directional stretching of sensors (c and d), and the system’s real-time reaction for monitoring breathing (e)^[51]. Copyright 2023, Wiley. LGPs: Light guide panels; IR: infrared; AgNW: silver nanowires; PPG: photoplethysmogram; LEDs: light-emitting diodes.