A Degradable Sensor Based on Insect Protein for Postsurgical Diagnosis of Joint Health

Abstract

Degradable electronics have received extensive attention due to their potential to construct 'green' electronics and implantable medical devices. However, in the development of degradable devices, the contradiction between the strict requirements for biodegradability and the pursuit of device performance has brought considerable challenges to the selection of materials. This paper reports a biodegradable flexible tactile sensor (BFTS) based on chitosan film doped with Ostrinia furnacalis cuticular protein (OfCPH-1) as substrate and Zn as the interdigital electrode. The BFTS maintains a precise and stable response to microdistance, and it is completely degraded in 3 h through the solubility test in Stroke-physiological saline solution. Furthermore, the BFTS has been tested in complications monitoring after meniscal removal surgery by the dynamic detection of articular cartilage wear and effusion of joint. These results indicate that the BFTS has potential application as implantable medical devices.

High Sensitivity and Wide Linear Range Flexible Piezoresistive Pressure Sensor with Microspheres as Spacers for Pronunciation Recognition

“…The distribution range of pressures associated with human motion and health is very wide, as illustrated in Figure a. Especially, the pressures generated by human motion, such as grip pressure, , plantar pressure, − and joint bending pressure, − are of particular interest to flexible pressure sensors for health monitoring and healthcare applications. These pressures are predominantly distributed in a medium-pressure regime (10–100 kPa). , However, at present, the pressure sensors with high sensitivity are normally restricted into a narrow pressure range of detection (ROD) lower than 10 kPa, − while those with a wide ROD over 100 kPa generally have low sensitivity. − For example, the flexible pressure sensor based on a microstructured porous pyramid possesses a sensitivity of as high as 449 kPa –1 but only within the pressure range of 0.14–10 Pa .…”