ポータブルで低コストの技術で子宮収縮を追跡(Portable, low-cost tech tracks uterine contractions)

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2023-07-17 ワシントン大学セントルイス校

ポータブルで低コストの技術で子宮収縮を追跡(Portable, low-cost tech tracks uterine contractions)
A collaboration of researchers at Washington University St. Louis have created a more accessible route to prenatal care: a portable uterine-contraction tracker, a cheap-to-make, flexible electrode patch. (iStock photo)

◆ワシントン大学セントルイス校とスウェーデンのルンド大学の研究者は、妊娠中の子宮収縮を追跡するための携帯可能な装置を開発しました。この装置は柔軟な電極パッチで作られ、低コストで製造可能です。これにより、妊娠ケアへのアクセスが向上し、特に早産などの合併症に対処するための重要なツールとなります。
◆既存の大型装置と比べて手軽な使用が可能であり、医療格差のある地域において負担を軽減できる可能性があります。この装置は、電気信号を使用して子宮収縮を監視し、異常な収縮パターンを検出する非侵襲的な電気筋肉子宮イメージング(EMMI)法をベースにしています。今後の研究では、さらに多くのデータを収集し、この技術の応用範囲を拡大する予定です。

<関連情報>

筋電位計測のためのポータブルでスケーラブルなマルチチャンネルワイヤレス記録システム A Portable and a Scalable Multi-Channel Wireless Recording System for Wearable Electromyometrial Imaging

Weilun Li,Zhili Xiao,Junyi Zhao,Kenji Aono,Stephanie Pizzella,Zichao Wen,Yong Wang,Chuan Wang,Shantanu Chakrabartty
IEEE Transactions on Biomedical Circuits and Systems  Published:19 May 2023
DOI:https://doi.org/10.1109/TBCAS.2023.3278104

Abstract

Electromyometrial imaging (EMMI) technology has emerged as one of the promising technology that can be used for non-invasive pregnancy risk stratification and for preventing complications due to pre-term birth. Current EMMI systems are bulky and require a tethered connection to desktop instrumentation, as a result, the system cannot be used in non-clinical and ambulatory settings. In this paper, we propose an approach for designing a scalable, portable wireless EMMI recording system that can be used for in-home and remote monitoring. The wearable system uses a non-equilibrium differential electrode multiplexing approach to enhance signal acquisition bandwidth and to reduce the artifacts due to electrode drifts, amplifier 1/f noise, and bio-potential amplifier saturation. A combination of active shielding, a passive filter network, and a high-end instrumentation amplifier ensures sufficient input dynamic range ( >100 dB ) such that the system can simultaneously acquire different bio-potential signals like maternal electrocardiogram (ECG) in addition to the EMMI electromyogram (EMG) signals. We show that the switching artifacts and the channel cross-talk introduced due to non-equilibrium sampling can be reduced using a compensation technique. This enables the system to be potentially scaled to a large number of channels without significantly increasing the system power dissipation. We demonstrate the feasibility of the proposed approach in a clinical setting using an 8-channel battery-powered prototype which dissipates less than 8  μ W per channel for a signal bandwidth of 1KHz.

医療・健康
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