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Proposal of Cardiopulmonary bypass operation support system based on pressure flow characteristics model

Research Project

Project/Area Number 19K12851
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 90130:Medical systems-related
Research InstitutionHiroshima International University

Principal Investigator

Takahashi Hidenobu  広島国際大学, 保健医療学部, 講師 (10773103)

Co-Investigator(Kenkyū-buntansha) 黒崎 達也  広島大学, 病院(医), 准教授 (40448270)
岡原 重幸  純真学園大学, 医療工学科, 教授 (50771185)
二宮 伸治  広島国際大学, 保健医療学部, 教授 (60237774)
曽 智  広島大学, 先進理工系科学研究科(工), 准教授 (80724351)
辻 敏夫  広島大学, 先進理工系科学研究科(工), 教授 (90179995)
Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords自動操作方法 / 人工心肺 / 2自由度モデルマッチング制御手法 / 制御学 / 操作支援システム / 医用システム関連
Outline of Research at the Start

人工心肺中のアクシデントを回避するためには人工心肺の操作を簡潔化する必要性が提言されている.しかしながら,これまで検討されてきた自動制御システムなどは手術中の環境変化への対応や安全性を担保できるシステムとはなっておらず,臨床現場では普及していない.
本研究では,送血側と脱血側の灌流回路絞り(以下,オクルーダと呼ぶ)の前後圧差によって血液流量を推定できることに着目した.
その意義は非常に大きくオクルーダを灌流する流体特性に基づく圧流量特性モデルはこれまでにない試みであること,)オクルーダ圧流量推定式を利用した人工心肺操作支援システムの開発は世界初のチャレンジであることなどが挙げられる.

Outline of Final Research Achievements

A study was conducted on automatic control methods for cardiopulmonary bypass device operation. For this purpose, it was necessary to propose an automatic control system that can simultaneously control the reservoir level and blood flow rate. The blood flow control system was designed based on a 2-DOF model matching control method using feedforward and feedback control, and the reservoir level controller was designed based on I-PD feedback control. This control system was implemented in a cardiopulmonary bypass device, and experiments were conducted to automatically control the arterial-line side blood flow rate based on the manually adjusted venous-line side blood flow rate. The experimental results showed that the blood flow rate on the sending side followed the manually adjusted blood flow rate on the de-bleeding side very well.

Translated with www.DeepL.com/Translator (free version)

Academic Significance and Societal Importance of the Research Achievements

人工心肺装置の操作は熟練した操作により,リザーバの貯血量は脱血側と送血側の流量を等しくなるように一定に保たれる必要がある.なぜなら血液量が少しでも変化するとリザーバの貯血量は変動し,それに応じて患者の血圧が大きく変動するからである.このような繊細な操作は,私達,人工心肺の操作を行う者として心理的負担がとても大きい.また,安全・安心で操作しなくてはいけない人工心肺操作ですが,2021年の日本体外循環技術医学会の報告では,約3.8万件の開心術に対して,1.4%にあたる541件にアクシデントがあったと報告されています.これらのことから医療事故低減の為にこの装置の自動化の必要性が指摘されていた.

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (4 results)

All 2023 2022

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Simultaneous Control of Venous Reservoir Level and Arterial Flow Rate in Cardiopulmonary Bypass With a Centrifugal Pump2023

    • Author(s)
      Takahashi Hidenobu、Kinoshita Takuya、Soh Zu、Okahara Shigeyuki、Miyamoto Satoshi、Ninomiya Shinji、Tsuji Toshio
    • Journal Title

      IEEE Journal of Translational Engineering in Health and Medicine

      Volume: 11 Pages: 435-440

    • DOI

      10.1109/jtehm.2023.3290951

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Automatic control of blood flow rate on the arterial-line side during cardiopulmonary bypass2023

    • Author(s)
      Takahashi Hidenobu、Kinoshita Takuya、Soh Zu、Tsuji Toshio
    • Journal Title

      Annu Int Conf IEEE Eng Med Biol Soc

      Volume: 2021 Nov Pages: 5011-5014

    • DOI

      10.1109/embc46164.2021.9629644

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Steady-State Model of Pressure-Flow Characteristics Modulated by Occluders in Cardiopulmonary Bypass Systems2023

    • Author(s)
      Takahashi Hidenobu、Soh Zu、Tsuji Toshio
    • Journal Title

      IEEE Access

      Volume: 8 Pages: 220962-220972

    • DOI

      10.1109/access.2020.3043470

    • Related Report
      2022 Research-status Report 2020 Research-status Report
  • [Patent(Industrial Property Rights)] 血液循環システムの制御装置、制御方法及びプログラム2022

    • Inventor(s)
      辻 敏夫,木下 拓矢,曽 智, 高橋秀暢
    • Industrial Property Rights Holder
      辻 敏夫,木下 拓矢,曽 智, 高橋秀暢
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Acquisition Date
      2023
    • Related Report
      2023 Annual Research Report

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Published: 2019-04-18   Modified: 2025-01-30  

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