External pasting TENGs for biomedical and healthcare applications. (a) Membrane-based self-powered triboelectric sensors for pressure change detection. Reproduced with permission [137]. Copyright 2014, John Wiley & Sons. (b) Eardrum-inspired active sensors for self-powered cardiovascular system characterization. Reproduced with permission [138]. Copyright 2015, John Wiley & Sons. (c) Self-powered pulse sensor for antidiastole of cardiovascular disease. Reproduced with permission [139]. Copyright 2017, John Wiley & Sons. (d) A flexible, stretchable, and shape-adaptive TENG. Reproduced with permission [140]. Copyright 2015, John Wiley & Sons. (e) Stretchable-rubber-based TENG and its application as self-powered body motion sensors. Reproduced with permission [141]. Copyright 2015, John Wiley & Sons. (f) A highly shape-adaptive, stretchable TENG based on conductive liquid. Reproduced with permission [142]. Copyright 2016, American Association for the Advancement of Science.