Method and apparatus for leak detection in a fluid line
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61M-037/00
A61M-001/00
C02F-001/44
C02F-001/00
B01D-035/00
B01D-035/14
B01D-035/147
B01D-011/00
B01D-061/00
출원번호
US-0900362
(2001-07-07)
발명자
/ 주소
Brugger, James M.
Burbank, Jeffrey H.
Treu, Dennis M.
출원인 / 주소
NxStage Medical, Inc.
대리인 / 주소
Proskauer Rose LLP
인용정보
피인용 횟수 :
163인용 특허 :
2
초록▼
One of the most significant safety concerns in the automation of extracorporeal blood treatments such as dialysis is the risk of blood leakage. Such systems draw blood at such a high rate that a loss of integrity in the blood circuit can be catastrophic. The most reliable leak detection method known
One of the most significant safety concerns in the automation of extracorporeal blood treatments such as dialysis is the risk of blood leakage. Such systems draw blood at such a high rate that a loss of integrity in the blood circuit can be catastrophic. The most reliable leak detection method known is the detection of infiltrated air in a blood line, but this only works in blood lines under negative pressure. According to the invention, a leak detector for return lines is provided by periodically generating a negative pressure, which may be brief or at a 50% duty cycle, in the blood return line to draw air into it and thereby reveal the leaks using an air sensor. Although the return line is ordinarily under positive pressure, during the negative pressure cycle, the blood return line draws air through any leaks or disconnects. If air is detected, the system is shut down and an alarm generated.
대표청구항▼
One of the most significant safety concerns in the automation of extracorporeal blood treatments such as dialysis is the risk of blood leakage. Such systems draw blood at such a high rate that a loss of integrity in the blood circuit can be catastrophic. The most reliable leak detection method known
One of the most significant safety concerns in the automation of extracorporeal blood treatments such as dialysis is the risk of blood leakage. Such systems draw blood at such a high rate that a loss of integrity in the blood circuit can be catastrophic. The most reliable leak detection method known is the detection of infiltrated air in a blood line, but this only works in blood lines under negative pressure. According to the invention, a leak detector for return lines is provided by periodically generating a negative pressure, which may be brief or at a 50% duty cycle, in the blood return line to draw air into it and thereby reveal the leaks using an air sensor. Although the return line is ordinarily under positive pressure, during the negative pressure cycle, the blood return line draws air through any leaks or disconnects. If air is detected, the system is shut down and an alarm generated. 4290427, 19810900, Chin; US-4319580, 19820300, Colley et al.; US-4325381, 19820400, Glenn, 128/660.1; US-4327738, 19820500, Green et al.; US-4354500, 19821000, Colley et al.; US-4354501, 19821000, Colley et al.; US-4374525, 19830200, Baba, 128/660; US-4375818, 19830300, Sawaki et al.; US-4391282, 19830700, Andou et al.; US-4402308, 19830900, Scott; US-4431006, 19840200, Trimmer et al.; US-4462408, 19840700, Silverstein et al.; US-4466443, 19840800, Utsugi, 600/463; US-4466444, 19840800, Baba; US-4475553, 19841000, Yamaguchi et al.; US-4494549, 19850100, Namba et al.; US-4516972, 19850500, Samson; US-4546771, 19851000, Eggleton et al., 128/660; US-4558706, 19851200, Nakada et al.; US-4572201, 19860200, Kondo et al.; US-4576177, 19860300, Webster, Jr.; US-4589419, 19860500, Laughlin et al., 128/660.03; US-4605009, 19860800, Pourcelot et al.; US-4633882, 19870100, Matsuo et al.; US-4669465, 19870600, Moore et al., 128/303.1; US-4674515, 19870600, Andou et al.; US-4729384, 19880300, Bazenet; US-4732156, 19880300, Nakamura; US-4754752, 19880700, Ginsburg et al., 128/303.12; US-4771788, 19880900, Miller; US-4794931, 19890100, Yock, 128/660.03; US-4802487, 19890200, Martin et al., 600/463; US-4821731, 19890400, Martinelli et al., 128/662.05; US-4841977, 19890600, Griffith et al., 128/660.03; US-4887606, 19891200, Yock et al., 128/662.05; US-4889128, 19891200, Millar, 128/662.06; US-4899757, 19900200, Pope, Jr. et al., 128/662.06; US-4911170, 19900300, Thomas, III et al.; US-4917097, 19900400, Proudian, deceased et al., 128/662.06; US-4936307, 19900600, Saito et al.; US-4951677, 19900800, Crowley et al., 600/463; US-4955377, 19900900, Lennox et al., 128/401; US-4979939, 19901200, Shiber, 606/159; US-4991588, 19910200, Pfueger et al., 128/662.06; US-5000185, 19910300, Yock, 128/662.03; US-5002059, 19910300, Crowley et al., 128/662.06; US-5024234, 19910600, Leary et al., 128/663.01; US-5029588, 19910700, Yock et al., 128/662.06; US-5040548, 19910800, Yock, 128/898; US-5049130, 19910900, Powell, 604/096; US-5061275, 19911000, Wallsten et al., 606/194; US-5095911, 19920300, Pomeranz, 128/662.06; US-5100424, 19920300, Jang et al., 606/159; US-5105819, 19920400, Wollschlager et al.; US-5117831, 19920600, Jang et al., 606/159
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