Battery-free, wireless soft sensors for continuous multi-site measurements of pressure and temperature from patients at risk for pressure injuries

• Published in: Nature communications Vol. 12; no. 1; pp. 5008 - 16
• Main Authors: Oh, Yong Suk, Kim, Jae-Hwan, Xie, Zhaoqian, Cho, Seokjoo, Han, Hyeonseok, Jeon, Sung Woo, Park, Minsu, Namkoong, Myeong, Avila, Raudel, Song, Zhen, Lee, Sung-Uk, Ko, Kabseok, Lee, Jungyup, Lee, Je-Sang, Min, Weon Gi, Lee, Byeong-Ju, Choi, Myungwoo, Chung, Ha Uk, Kim, Jongwon, Han, Mengdi, Koo, Jahyun, Choi, Yeon Sik, Kwak, Sung Soo, Kim, Sung Bong, Kim, Jeonghyun, Choi, Jungil, Kang, Chang-Mo, Kim, Jong Uk, Kwon, Kyeongha, Won, Sang Min, Baek, Janice Mihyun, Lee, Yujin, Kim, So Young, Lu, Wei, Vazquez-Guardado, Abraham, Jeong, Hyoyoung, Ryu, Hanjun, Lee, Geumbee, Kim, Kyuyoung, Kim, Seunghwan, Kim, Min Seong, Choi, Jungrak, Choi, Dong Yun, Yang, Quansan, Zhao, Hangbo, Bai, Wubin, Jang, Hokyung, Yu, Yongjoon, Lim, Jaeman, Guo, Xu, Kim, Bong Hoon, Jeon, Seokwoo, Davies, Charles, Banks, Anthony, Sung, Hyung Jin, Huang, Yonggang, Park, Inkyu, Rogers, John A.
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 24.08.2021; Nature Publishing Group; Nature Portfolio
• Subjects: 142/126; 639/166/985; 639/166/987; 639/166/988; 639/301/1005/1007; 692/700/459/284; Adult; Aged; Aged, 80 and over; Antennas; Bedding; Biosensing Techniques - instrumentation; Biosensing Techniques - methods; Clinical trials; Electric Power Supplies; Equipment Design; Female; Health risks; Humanities and Social Sciences; Humans; Immobilization; Injuries; Interfaces; Male; Middle Aged; Monitoring; Monitoring, Physiologic; multidisciplinary; Patients; Pressure; Pressure Ulcer; Pressure ulcers; Regulatory sequences; Robustness (mathematics); Science; Science (multidisciplinary); Sensors; Skin; Temperature; Thermography - instrumentation; Thermography - methods; Wireless Technology
• ISSN: 2041-1723; 2041-1723
• DOI: 10.1038/s41467-021-25324-w

Capabilities for continuous monitoring of pressures and temperatures at critical skin interfaces can help to guide care strategies that minimize the potential for pressure injuries in hospitalized patients or in individuals confined to the bed. This paper introduces a soft, skin-mountable class of sensor system for this purpose. The design includes a pressure-responsive element based on membrane deflection and a battery-free, wireless mode of operation capable of multi-site measurements at strategic locations across the body. Such devices yield continuous, simultaneous readings of pressure and temperature in a sequential readout scheme from a pair of primary antennas mounted under the bedding and connected to a wireless reader and a multiplexer located at the bedside. Experimental evaluation of the sensor and the complete system includes benchtop measurements and numerical simulations of the key features. Clinical trials involving two hemiplegic patients and a tetraplegic patient demonstrate the feasibility, functionality and long-term stability of this technology in operating hospital settings. Uninterrupted monitoring of pressure and temperature at skin interfaces can help to minimize the potential for pressure injuries in hospitalized or bedridden patients. Here, the authors introduce a soft, skin-mountable sensor that can continuously provide readings via antennas mounted under bedding, and demonstrate the functionality and robustness of the devices on patients.