2022 Fiscal Year Final Research Report
Development of a new non-invasive pulmonary oxygen diffusing capacity measurement device under resting breathing
Project/Area Number |
20K08557
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 53030:Respiratory medicine-related
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Research Institution | Tohoku University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
黒澤 一 東北大学, 事業支援機構, 教授 (60333788)
色川 俊也 東北大学, 事業支援機構, 教授 (70375179)
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Project Period (FY) |
2020-04-01 – 2023-03-31
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Keywords | 肺拡散能 / 呼吸機能 / 肺生理 |
Outline of Final Research Achievements |
In this study, we established a method for measuring lung oxygen diffusing capacity under resting breathing, which had been difficult to measure, and developed a device for measuring pulmonary oxygen diffusing capacity during quiet breathing. For the measurement of pulmonary oxygen diffusing capacity, a method was constructed to calculate the change in oxygen uptake during a single inspiration under multi-stage oxygen concentration loading. In order to control the inspiratory gas, we incorporated a demand valve into the inspiratory circuit and developed a device that can measure exhaled gas volume, exhaled O2, and exhaled CO2 in real time. The base gas is room air or 30% O2 gas, and the load gas is 40% O2, 60% O2, and 80% O2 gas. The measurement specification was to inhale the load gas once when the breathing during inhalation of the base gas stabilized.
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Free Research Field |
呼吸器
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Academic Significance and Societal Importance of the Research Achievements |
酸素O2の肺拡散能は、ガス交換能を評価する指標であるが、測定が困難なため、一酸化炭素COを指標とした肺CO拡散能を代替指標として用いてきた。しかし、CO拡散能はO2拡散能を示していないこと、COはO2運搬に影響をあたえること、現在測定方法として一般的に行われている1回呼吸法は被検者の協力が必要であること、低肺機能では正しく測定できないこと、など問題が指摘されていた。本研究機器の開発により、被検者の協力を必要とせずに、O2拡散能を実臨床で評価することが可能となり、COを使用しないことから、呼吸器状態の悪い患者にも測定が可能となり、急性期の病態評価・治療にも役立つものと考えている。
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