Kirigami‐Inspired Pressure Sensors for Wearable Dynamic Cardiovascular Monitoring

Abstract

Continuously and accurately monitoring pulse‐wave signals is critical to prevent and diagnose cardiovascular diseases. However, existing wearable pulse sensors are vulnerable to motion artifacts due to the lack of proper adhesion and conformal interface with human skin during body movement. Here, a highly sensitive and conformal pressure sensor inspired by the kirigami structure is developed to measure the human pulse wave on different body artery sites under various prestressing pressure conditions and even with body movement. COMSOL multiphysical field coupling simulation and experimental testing are used to verify the unique advantages of the kirigami structure. The device shows a superior sensitivity (35.2 mV Pa−1) and remarkable stability (>84 000 cycles). Toward practical applications, a wireless cardiovascular monitoring system is developed for wirelessly transmitting the pulse signals to a mobile phone in real‐time, which successfully distinguished the pulse waveforms from different participants. The pulse waveforms measured by the kirigami inspired pressure sensor are as accurate as those provided by the commercial medical device. Given the compelling features, the sensor provides an ascendant way for wearable electronics to overcome motion artifacts when monitoring pulse signals, thus representing a solid advancement toward personalized healthcare in the era of the Internet of Things.

Advances in Bioinspired Triboelectric Nanogenerators

“…[180][181][182][183][184][185][186][187][188] For example, nanostructures can affect a material's mechanical or steric properties, thermal and electrical conductivity, optical absorption, and melting point. [189][190][191][192][193][194][195][196][197] In addition, macrostructures such as the morphologies of hummingbird wings, [30] fish gills, [198] and fish scales [199] can inspire the organization of a TENG's electrodes. Although mimicking these structures in a TENG may not provide the same unique characteristics like breathing underwater or hovering in the air, these structures can provide valuable inspiration for unique electrode configurations that can widen the scope of energies that TENGs can harvest and increase their output parameters.…”

Recent Advances in Multifunctional Wearable Sensors and Systems: Design, Fabrication, and Applications

“…However, due to the complexity of human physiological signals, it is often necessary to judge the health status of the human body through multiple information at the same time, which requires wearable sensor systems capable of numerous sensing functions [ 45 , 46 , 47 ]. Specifically, as shown in Figure 1 , the signals that the wearable sensor can monitor include movement [ 48 , 49 , 50 ], pressure [ 51 , 52 , 53 ], temperature [ 54 , 55 , 56 ], humidity [ 57 , 58 , 59 ], and heart rate [ 60 , 61 , 62 ]. In addition, through the electrochemical analysis of human secretions (such as sweat [ 63 ] and tears [ 64 ]), a variety of physiological signals can be obtained [ 65 ], such as the concentration of glucose [ 66 , 67 ], lactic acid [ 68 , 69 ], sodium, and potassium ions [ 70 , 71 , 72 ].…”

A broad range and piezoresistive flexible pressure sensor based on carbon nanotube network dip-coated porous elastomer sponge

“…Recently, most developed exible pressure sensors focus on wearable elds, such as electronic skin, human motion monitoring and human-machine interfaces. [7][8][9][10][11][12] In general, pressure sensors are divided into types including piezoresistive, 13,14 capacitive, 8,15 piezoelectric, 16,17 triboelectric 18,19 and other ones, 20,21 while piezoresistive pressure sensors show great merits like high sensitivity to both pressure and deformation, simple working mechanism and design, easy signal collection and so on. External mechanical signals like pressures or strains will be transducing into internal resistance change and then it can be detectable in the forms of current or even voltage.…”