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Breath Synchronized Oxygen Concentrators

Research Project

Project/Area Number 60870052
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field 麻酔学
Research InstitutionTottori University

Principal Investigator

SATO Toru  Tottori University School of Medicine, Professor, 医学部, 教授 (10031949)

Co-Investigator(Kenkyū-buntansha) SASAKI Takao  Tottori University School of Medicine, Professor, 医学部, 教授 (10004631)
高野 和潔  山陽電子工業(株), 研究開部, 副部長
藤井 勝正  山陽電子工業(株), 工場長
OKAZAKI Naoto  Tottori University School of Medicine, 医学部, 助手 (30032204)
SAITO Noroki  Tottori University Hospital, 医学部附属病院, 講師 (40116330)
FUJII Katsumasa  Sanyo Denshi Kogyo Co, Ltd.
TAKANO Kazukiyo  Sanyo Denshi Kogyo Co, Ltd.
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 1986: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1985: ¥3,500,000 (Direct Cost: ¥3,500,000)
KeywordsOxygen inhalation / Pressure swing adsorption (PSA) type oxygen Concentrator / Insufflation / 呼吸同調
Research Abstract

Constant-flow oxygen insufflation through a nasal cannula has been widely used for inhalation therapy, but it wastes oxygen during the patient's exhalation. We have developed an electronically controlled patient-triggered intermittent insufflation device which delivers peak flow of oxygen only during early part of each inspiration. This device is comprised of respiratory sensors (copper-constant thermocouples fixed to a nasal cannula), a reservoir tank of adequate capacity, a controller and a low flow-resistant humidifier. The controller consists of a pair of input from the sensor, a differentral amplifier, a low pass filter, peak-holding circuits, comparators, a microprocessor, flip-flops, a pulse generator for driving a solenoid valve, etc. The microprocessor accumulates avaraged data of previous respiratory cycles and can predict the optimum time of next intermittent insufflation; starts somewhat earlier than the next inspiration-start and ends earlier than the inspiration-end. A go … More od combination of this device with a small PSA oxygen concentrator not only saves the amount of insufflated oxygen (almost a half) to achieve the same inhalational effect but also increases the amount of purge-gas to wash out adsorbed nitrogen so that efficiency of the concentrator can be improved almost twice, totally more than four-fold. As the result, a newly designed machine, having a breath synchronizing mechanism incorporated inside (size 30 x 26 x 40 cm, 160 W - AC 100V 60Hz), can keep oxygen concentration over 90 % in the output gas to 2.7 l/min. flow setting, i.e. peak flow rate of about 5 l/min., while it delivers 1 l/min. constant flow containing 93 % oxygen when triggering mechanism is mannually OFF or automatically OFF as safe guard against unefficient synchronization due to apena, etc. We have also made a small portable, independent synchronizing box, which can be used mainly with a portable oxygen source so as to prolong its usage time almost twice. These devices are very useful in training COPD patients in respiratory rehabilitation program. Less

Report

(3 results)
  • 1986 Annual Research Report   Final Research Report Summary
  • 1985 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 佐藤暢,岡崎直人: 病態生理. 5(11). 881-886 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 佐藤暢,斎藤憲輝,岡崎直人,藤井勝正,高野和潔,佐々木秀夫: Medical Way. 4(5). 81-86 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 斎藤憲輝: 呼吸. 6. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 佐藤暢: Respiratory Care. 32. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Toru Sato, Naoto Okazaki: "Oxygen concentrator with breath-synchronized feeding system" Byotaiseiri. 5(11). 881-886 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Toru Sato, Noriki Saito, Naoto Okazaki, Katsumasa Fujii, Kazukiyo Takano, Takao Sasaki: "New Breath Synchoronized Oxygen Concentrator" Medical Way. 4(5). 81-86 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Noriki Saito: "Intermittent and Constant Flow Oxygen Insufflation through a Nasal Cannula" Respiration Research. 6. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Tosu Sato: "Breath Synchoronized Oxygen Concentrators" Respiratory Care. 32. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 佐藤暢,岡崎直人: 新医療技術研究事業に係る厚生科学研究費補助金による研究報告書. 92-95 (1985)

    • Related Report
      1986 Annual Research Report
  • [Publications] 佐藤暢,岡崎直人: 病態生理. 5(11). 881-886 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 佐藤暢,斎藤憲輝,岡崎直人,藤井勝正,高野和潔,佐々木孝夫: Medical Way. 4(5). (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] 斎藤憲輝: 呼吸. (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] 医科器械学 日本医科器械学会. 55-4. (1985)

    • Related Report
      1985 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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