[특허]Ventilating system for supplying a patient with respiratory gas and method for triggering the respiratory phases in said

Ventilating system for supplying a patient with respiratory gas and method for triggering the respiratory phases in said 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61M-016/00
출원번호	US-0524535 (1995-09-07)
우선권정보	DE-4432219 (1994-09-10)
발명자 / 주소	Weismann Dieter (Gross Gronau DEX) Colla Gregory-Alan (North Sydney AUX) Fiebelkron Dirk (Lubeck DEX)
출원인 / 주소	Dragerwerk AG (Lubeck DEX 03)
인용정보	피인용 횟수 : 100 인용 특허 : 0

초록 ▼

A ventilating system for supplying a patient with respiratory gas has an apparatus for measuring a respiratory gas flow curve 27 and a respiratory gas pressure curve 28 and has an evaluation circuit 8 for processing at least the respiratory gas flow curve and switching over the respiratory phases. As switchover values from one respiratory phase to the other, the evaluation circuit 8 utilizes predetermined trigger thresholds TIL, TEL of the respiratory gas flow curve 27. The ventilating system is improved in such a manner that a good adaptation thereof to the breathing effort of the patient 2 is provided even when leakage is present. This task is solved in that, in the evaluation circuit, the respiratory gas flow curve 27 and the respiratory gas pressure curve 28 are logically coupled during both the inspiratory phase and the expiratory phase. This logic operation takes place in accordance with a predetermined function. From the foregoing, an inspiratory trigger ancillary threshold ZI and an expiratory trigger ancillary threshold ZE are computed as an additional switchover criterion. These trigger ancillary thresholds ZI and ZE are added to the trigger thresholds TIL and TEL, respectively. A method for triggering the respiratory phase in the system is also disclosed.

대표청구항 ▼

A ventilating system for supplying a patient with respiratory gas during inspiratory and expiratory phases of breathing, the ventilating system comprising: a source of compressed respiratory gas; valve means connected to said source of compressed respiratory gas and being provided for metering a flow of said respiratory gas to the patient thereby adjusting predetermined pressures of said respiratory gas during said inspiratory phases and expiratory phases of the patient; a pressure measuring device for measuring the pressure of the respiratory gas supplied to the patient during inspiration and expiration and for providing measured pressure values defining a first curve representing respiratory gas pressure; a flow measuring device for measuring respiratory gas flow during inspiration and expiration and for providing measured flow values defining a second curve representing respiratory gas flow and said second curve having an amplitude; an evaluation circuit for processing said curves and for controlling said valve means to switch over between said inspiratory and expiratory phases of the patient upon predetermined values of the amplitude of said second curve, said predetermined values being trigger thresholds TIL and TEL of said second curve; and, said evaluation circuit including means for executing a logic operation pursuant to a predetermined function between said first and second curves during said inspiratory phases and expiratory phases of the patient to form an inspiratory ancillary trigger threshold ZI and an expiratory ancillary trigger threshold ZE and to add said ancillary trigger thresholds (ZI and ZE) to said inspiratory and expiratory thresholds (TIL and TEL), respectively, to form composite trigger thresholds (TIL+ZI) and (TEL+ZE) for controlling the switchover between said phases.

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A	생활필수품
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연합인증

Ventilating system for supplying a patient with respiratory gas and method for triggering the respiratory phases in said 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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Ventilating system for supplying a patient with respiratory gas and method for triggering the respiratory phases in said 원문보기

초록 ▼

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연구과제 타임라인

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