[특허]Method for testing a filter in a dialysis system

Method for testing a filter in a dialysis system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01N-015/08 B01D-011/00 A61M-037/00
출원번호	US-0697842 (1996-08-29)
우선권정보	DE-0034417 (1995-09-16)
발명자 / 주소	Wamsiedler Ralf,DEX Mathieu Bernd,DEX
출원인 / 주소	Fresenius AG, DEX
대리인 / 주소	Townsend and Townsend and Crew LLPAllen
인용정보	피인용 횟수 : 95 인용 특허 : 0

초록 ▼

A method for testing filters arranged in the dialysis solution system of an extracorporeal blood treatment apparatus is described, in which the filter membrane being tested is fully wetted with an aqueous solution, in which the branch of the dialysis solution system housing one of the two chambers of the filter being tested is closed off from the remaining branches, in which gas is conducted into the closed-off branch until a predetermined excess pressure has formed in the one chamber of the filter being tested. Simultaneously, the aqueous solution previously conducted into the chamber to fully wet the filter membrane is expelled. The excess pressure in the one chamber of the filter is monitored, in which the pressure drop per unit time is compared with a given reference value which is characteristic of a fully intact filter membrane. If the reference value is exceeded, this provides and indication of a leak in the filter membrane. Further, a dialysis solution system of an extracorporeal blood treatment apparatus is described which comprises at least one filter (16, 35) and a means (21) for closing off a branch of the dialysis solution system housing one of the two chambers (18, 37) of the filter (16, 35) from the remaining branches of the dialysis solution system. The dialysis solution system also includes an air pump (42) for conducting air through at least one hydrophobic filter (43) in the closed-off branch of the dialysis solution system. Moreover, a monitoring device (56) is provided which compares the pressure drop value measured by a pressure sensor (54) and signals a leak in the filter membrane being tested if the given reference value is exceeded.

대표청구항 ▼

[ What is claimed is:] [1.] A method for testing at least one filter arranged in a dialysis solution system of an extracorporeal blood treatment apparatus, the filter being divided by a germ-retaining membrane into a first chamber and a second chamber, the method comprising steps of:filling at least one branch of the dialysis solution system with an aqueous solution, the aqueous solution fully wetting the germ-retaining membrane of the filter,sealing off the one branch of the dialysis solution system from remaining branches of the dialysis solution system, wherein the one branch houses the first chamber of the filter,conducting gas into the one branch of the dialysis solution system housing the first chamber to expel fluid through the germ-retaining membrane of the filter,shutting off the supply of gas once a predetermined pressure is formed in the first chamber, andmonitoring a rate of change of pressure in the first chamber of the filter to provide information on membrane integrity.

이 특허를 인용한 특허 (95)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Method for testing a filter in a dialysis system 원문보기

초록 ▼

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Method for testing a filter in a dialysis system 원문보기

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이 특허를 인용한 특허 (95)

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