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A pressure-resistant zwitterionic skin sensor for domestic real-time monitoring and pro-healing of pressure injury

Biosensors and Bioelectronics, ISSN: 0956-5663, Vol: 214, Page: 114528
2022
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Article Description

Pressure injury (PI) is a hard-to-heal wound to patients with the limited mobility, especially paralyzed or elderly persons. These patients also commonly suffer from sensation loss or dementia that is unable to indicate symptoms in time, resulting in missing the “golden period” for treatment. Therefore, it is highly required to domestic continously real-time monitoring as well as promoting wound healing of PI. However, no existing device has realized these functions for PI. Herein, we prepare a zwitterionic skin sensor that enables pro-healing as well as domestic real-time monitoring the multi-indicators of PI. To apply for a PI dressing that requires to tolerate patient body weight, organosilicon nanoparticles (OSNPs) are designed as crosslinks in the zwitterionic conductive hydrogel (CH-OSNP), which exhibits pressure-resistant properties (99.81% compression to recovery) as well as anti-bacterial adhesion. Moreover, the CH-OSNP-based skin sensor is developed, and the resultant sensor can be sensitive to stress stimuli even under a long-term constant heavy load, which stimulates the pressure of a PI person lying down. In vivo results show that this sensor can not only promote PI healing, but also continuously monitor and distinguish multiple information, such as exudate, swelling, and infection, to prevent PI from being worsen. This work provides a domestic feasible device to cure and monitor the PI of patients.

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