2023-04-26 テキサス大学オースチン校(UT Austin)
テキサス大学オースティン校の研究者たちが開発した超薄型の軽量電子タトゥー、またはEタトゥーは、臨床環境外での連続的でモバイルな心臓監視に使用され、胸に取り付けられる。
このデバイスには、心臓の健康状態を明確に示す2つのセンサーがあり、早期に心臓病の赤信号をキャッチすることができるため、医療従事者にとって良い機会となる。
Eタトゥーは、2.5グラムの重さで、ペニーの大きさのバッテリーで40時間以上稼働し、患者にとってより快適で侵襲性の少ないモニタリングシステムである。
<関連情報>
- https://news.utexas.edu/2023/04/26/chest-e-tattoo-boasts-major-improvements-in-heart-monitoring/
- https://onlinelibrary.wiley.com/doi/10.1002/aelm.202201284
複数の心拍間隔を測定する胸部適合型ワイヤレス電気機械式Eタトゥー A Chest-Conformable, Wireless Electro-Mechanical E-Tattoo for Measuring Multiple Cardiac Time Intervals
Sarnab Bhattacharya, Mohammad Nikbakht, Alec Alden, Philip Tan, Jieting Wang, Taha A. Alhalimi, Sangjun Kim, Pulin Wang, Hirofumi Tanaka, Animesh Tandon, Edward F. Coyle, Omer T. Inan, Nanshu Lu
Advanced Electronic Materials Published: 18 April 2023
DOI:https://doi.org/10.1002/aelm.202201284
Abstract
Cardiovascular diseases are the leading cause of death globally. Noninvasive, accurate, and continuous cardiovascular monitoring can enable the preemptive detection of heart diseases and timely intervention to prevent serious cardiac complications. However, unobtrusive, ambulatory, and comprehensive cardiac monitoring is still a challenge as conventional electronics are rigid, heavy, or consume too much power for long-term measurement. This work presents a thin (200 µm), stretchable (20%), lightweight (2.5 g), wireless, and low-power (<3 mW) cardiac monitoring device that conforms to the human chest like a temporary tattoo sticker, correspondingly known as an e-tattoo. This chest e-tattoo features dual-mode electro-mechanical sensing—bio-electric cardiac signals via electrocardiography and mechanical cardiac rhythm via seismocardiography. A unique peripheral synchronization strategy between the two sensors enables the measurement of systolic time intervals like the pre-ejection period and the left ventricular ejection time with high accuracy (error = -0.44 ± 8.74 ms) while consuming very low power. The e-tattoo is validated against clinically approved gold-standard instruments on five human subjects. The good wearability and low power consumption of this e-tattoo permit 24-h continuous ambulatory monitoring.
