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2021 Fiscal Year Final Research Report

Establishment of next-generation ultrasound-guided nerve block based on Sonazoid and modified-envelope methods

Research Project

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Project/Area Number 19K18235
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 55050:Anesthesiology-related
Research InstitutionTohoku University

Principal Investigator

Onishi Eiko  東北大学, 大学病院, 助教 (10822265)

Project Period (FY) 2019-04-01 – 2022-03-31
Keywords超音波ガイド下神経ブロック / ソナゾイド / 硬膜外麻酔 / 超音波造影剤
Outline of Final Research Achievements

Contrast-enhanced ultrasonography (CEUS) using intravenous Sonazoid has been commonly used for a diagnosis of hepatic tumor and breast tumor. In our study, we investigated whether CEUS with Sonazoid could visualize the spread of local anesthetic(LA) in nerve block for perioperative patients. We demonstrated that a Sonazoid solution allowed clear, real-time, and continuous visualization of LA spread in the CEUS images without complications. This novel enhanced echography could be useful as one of the methods of confirming LA spread in nerve block. However, The visualization of deep area was insufficient, and needs to be improved in the future.
Modified-envelope method for visualization of thoracic vertebra is being improved. We investigated the visibility of outline of thoracic vertebra and interlaminar space in volunteer. In next step, we need to investigate the new method for patients to show the clinical utility.

Free Research Field

麻酔科

Academic Significance and Societal Importance of the Research Achievements

超音波造影剤ソナゾイドを用いることで、神経ブロックの薬液を可視化することができた。周術期の痛みをとる神経ブロックは様々な穿刺法が報告されているが、作用機序の解明や局所麻酔薬の指摘投与量を検証する必要がある。ソナゾイドはリアルタイムに持続的に薬液の広がりを計測できることから、様々な神経ブロックの作用機序を解明できる。また、胸部硬膜外麻酔は最も強力な術中の鎮痛法だが、手技的に難しい場合がある。われわれは、改良エンベロープ法を有する超音波画像装置で胸椎を可視化しながらせんしする方法を研究し、臨床応用へ向けて改良している。
本研究は安全で確実な神経ブロックの確立に貢献できる。

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Published: 2023-01-30  

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