[특허]Method and apparatus for producing pulsation

Method and apparatus for producing pulsation 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A01N-001/02
출원번호	US-0482231 (1990-02-20)
우선권정보	JP-0211237 (1989-08-18)
발명자 / 주소	Sugimachi Keizo (Fukuoka JPX) Takenaka Kenji (Fukuoka JPX) Shimada Mitsuo (Fukuoka JPX) Fukuzawa Kengo (Ohita JPX) Nishizaki Takashi (Fukuoka JPX) Ikeda Tetsuo (Fukuoka JPX) Yoshihara Atsushi (Tokyo
출원인 / 주소	Kureha Chemical Industry Co., Ltd. (Tokyo JPX 03)
인용정보	피인용 횟수 : 69 인용 특허 : 0

초록 ▼

In an apparatus which applies periodic pulsation to a solution flowing through a conduit while undergoing perfusion by a pump, a first valve is disposed in the conduit downstream of the pump, a bypass line is provided to the conduit downstream of the first valve, and a second valve is disposed in the bypass line for withdrawing some of a first pulsed flow formed in the conduit by opening and closing the first valve, through the bypass line as a second pulsed flow. A valve driving circuit periodically opens and closes the first valve and second valve at predetermined time schedules so that the second pulsed flow is superimposed upon the first pulsed flow to form a waveform in the conduit. Any desired pulsatile waveform can be obtained by adjusting the pulse width, the crest values, the delay time, etc., of the two pulsed flows.

대표청구항 ▼

A method of providing a predetermined pulsed flow of a solution to an organ, comprising the steps of: pumping the solution through a perfusion line connected to the organ; periodically restricting the flow of the solution in the perfusion line to provide a first pulsed flow of the solution in the perfusion line; and withdrawing some of the solution in the first pulsed flow thereof from the perfusion line through a bypass line and periodically restricting the flow of the solution in the bypass line in synchronism with the changing of the flow in the perfusion line to provide the predetermined pulsed flow to the organ. An apparatus which provides a predetermined pulsed flow of a solution to an organ, comprising: a conduit arrangement having an inlet and an outlet adapted to be connected to said organ to thereby enable said solution to be pumped to said organ; pump means connected to direct said solution from said inlet to said outlet through said conduit arrangement; first valve means disposed in said conduit arrangement downstream of said pump means; a bypass line connected between a first portion of said conduit arrangement downstream of said first valve means and a second portion of said conduit arrangement upstream of said pump means; second valve means disposed in said bypass line; valve controlling means for periodically operating said first valve means sand said second valve means in synchronism to provide a first pulsed flow of said solution in said first portion of said conduit arrangement upstream of said bypass line and said predetermined pulsed flow in said first portion of said conduit arrangement downstream of said connection of said first portion of said conduit arrangement to said bypass line, said apparatus further comprising an oxygenator disposed in said conduit arrangement upstream of said pump means and first valve means.

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연합인증

Method and apparatus for producing pulsation 원문보기

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Method and apparatus for producing pulsation 원문보기

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