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公开(公告)号：US5900726A
公开(公告)日：1999-05-04
申请号：US876445
申请日：1997-06-16
CPC分类号： A61M1/16 , A61M1/361 , A61M1/3612 , A61M1/3653 , A61M1/3658 , A61M1/3669 , G01F1/7046 , G01F1/708 , G01F1/7088
摘要： A flow rate of a fluid flowing in a tube is quantitatively determined by altering the electrical conductivity of the fluid by injection of a bolus of saline. The electrical conductivity of the altered conductivity is measured over the time it takes the altered conductivity fluid to pass a conductivity measuring location. The measured conductivity is integrated over the time it takes to pass the conductivity measuring location. The integral is interpreted to determine the flow rate.
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公开(公告)号：US06912917B2
公开(公告)日：2005-07-05
申请号：US10630004
申请日：2003-07-29
CPC分类号： A61M1/16 , A61M1/361 , A61M1/3612 , A61M1/3653 , A61M1/3655 , A61M1/3658 , A61M1/3659 , A61M1/3661 , A61M1/3669 , G01F1/7046 , G01F1/708 , G01F1/7088
摘要： Methods and apparatuses for determining a fluid parameter in a vessel by altering a property of the fluid, sensing the difference in the property after the fluid is altered, particularly as related to the property in an unaltered portion of the fluid.
摘要翻译： 用于通过改变流体的性质来确定容器中的流体参数的方法和装置，感测流体改变后特性的差异，特别是与流体的未改变部分中的性质有关。
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公开(公告)号：US06614212B2
公开(公告)日：2003-09-02
申请号：US10238164
申请日：2002-09-10
IPC分类号： G01N2700
CPC分类号： A61M1/16 , A61M1/361 , A61M1/3612 , A61M1/3653 , A61M1/3655 , A61M1/3658 , A61M1/3659 , A61M1/3661 , A61M1/3669 , G01F1/7046 , G01F1/708 , G01F1/7088
摘要： Method and apparatus for quantitatively determining a degree of recirculalion flow in a vessel of a fluid by altering the electrical conductivity of the fluid, sensing the difference in electromagnetic field after the fluid is altered, and integrating the sensed difference over a period of time including any time of potential recirculation of any altered conductivity fluid.
摘要翻译： 用于通过改变流体的电导率来定量地确定流体容器中的再循环流程的程度和装置，检测流体改变后电磁场的差异，以及在一段时间内积分感测的差异，包括任何 任何改变的导电液体的潜在再循环的时间。
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公开(公告)号：US5510716A
公开(公告)日：1996-04-23
申请号：US332647
申请日：1994-11-01
IPC分类号： G01N27/06 , A61M1/14 , A61M1/16 , A61M1/36 , G01F1/704 , G01F1/708 , G01N27/02 , G01N33/487 , G01R27/02 , B01D61/32
CPC分类号： G01F1/7088 , A61M1/16 , A61M1/361 , A61M1/3612 , A61M1/3653 , A61M1/3658 , A61M1/3669 , G01F1/7046 , G01F1/708
摘要： A differential conductivity recirculation monitor quantitatively determines the degree of recirculation in a fistula by comparing the conductivity of blood entering the fistula to the conductivity of blood being withdrawn from the fistula. A discrete quantity of a high conductivity marker fluid is injected into the blood entering the fistula, altering the conductivity of the blood entering the fistula. The altered conductivity blood enters the fistula and, if recirculation is present, co-mingles with blood in the fistula, altering the conductivity of the blood ion the fistula in proportion to the degree of recirculation. Blood withdrawn from the fistula has an altered conductivity related to the degree of recirculation. Quantitative values of the conductivity of the altered conductivity blood entering the fistula and the conductivity of the blood being withdrawn from the fistula are measured and a difference determined. The determined difference between the conductivities is used to determine a quantitative measurement of the degree of recirculation in the fistula.
摘要翻译： 差分电导率再循环监测器通过比较进入瘘的血液的电导率与从瘘管抽取的血液的电导率来定量地确定瘘管中的再循环程度。 将离散量的高电导率标记液注入进入瘘管的血液中，改变进入瘘管的血液的电导率。 改变的电导率血液进入瘘管，并且如果存在再循环，则与瘘管中的血液共混，改变与再循环程度成比例的血液离子瘘的电导率。 从瘘管中取出的血液与再循环程度相关的导电性改变。 测量进入瘘的改变的导电性血液的导电性的定量值和从瘘管取出的血液的电导率，并确定差异。 电导率之间的确定差异用于确定瘘管再循环程度的定量测量。
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公开(公告)号：US5570026A
公开(公告)日：1996-10-29
申请号：US455349
申请日：1995-05-31
IPC分类号： G01N27/06 , A61M1/14 , A61M1/16 , A61M1/36 , G01F1/704 , G01F1/708 , G01N27/02 , G01N33/487 , G01R27/02 , G01N27/08
CPC分类号： G01F1/7088 , A61M1/16 , A61M1/361 , A61M1/3612 , A61M1/3653 , A61M1/3658 , A61M1/3669 , G01F1/7046 , G01F1/708
摘要： A differential conductivity recirculation monitor quantitatively determines the degree of recirculation in a fistula by comparing the conductivity of blood entering the fistula to the conductivity of blood being withdrawn from the fistula. A discrete quantity of a high conductivity marker fluid is injected into the blood entering the fistula, altering the conductivity of the blood entering the fistula. The altered conductivity blood enters the fistula and, if recirculation is present, co-mingles with blood in the fistula, altering the conductivity of the blood in the fistula in proportion to the degree of recirculation. Blood withdrawn from the fistula has an altered conductivity related to the degree of recirculation. Quantitative values of the conductivity of the altered conductivity blood entering the fistula and the conductivity of the blood being withdrawn from the fistula are measured and a difference determined. The determined difference between the conductivities is used to determine a quantitative measurement of the degree of recirculation in the fistula.
摘要翻译： 差分电导率再循环监测器通过比较进入瘘的血液的电导率与从瘘管抽取的血液的电导率来定量地确定瘘管中的再循环程度。 将离散量的高电导率标记液注入进入瘘管的血液中，改变进入瘘管的血液的电导率。 改变的电导率血液进入瘘管，如果存在再循环，则与瘘管中的血液共混，根据再循环程度改变瘘管中的血液的电导率。 从瘘管中取出的血液与再循环程度相关的导电性改变。 测量进入瘘的改变的导电性血液的导电性的定量值和从瘘管取出的血液的电导率，并确定差异。 电导率之间的确定差异用于确定瘘管再循环程度的定量测量。
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公开(公告)号：US5510717A
公开(公告)日：1996-04-23
申请号：US454685
申请日：1995-05-31
IPC分类号： G01N27/06 , A61M1/14 , A61M1/16 , A61M1/36 , G01F1/704 , G01F1/708 , G01N27/02 , G01N33/487 , G01R27/02 , B01D61/32
CPC分类号： G01F1/7088 , A61M1/16 , A61M1/361 , A61M1/3612 , A61M1/3653 , A61M1/3658 , A61M1/3669 , G01F1/7046 , G01F1/708
摘要： A differential conductivity recirculation monitor quantitatively determines the degree of recirculation in a fistula by comparing the conductivity of blood entering the fistula to the conductivity of blood being withdrawn from the fistula. A discrete quantity of a high conductivity marker fluid is injected into the blood entering the fistula, altering the conductivity of the blood entering the fistula. The altered conductivity blood enters the fistula and, if recirculation is present, co-mingles with blood in the fistula, altering the conductivity of the blood ion the fistula in proportion to the degree of recirculation. Blood withdrawn from the fistula has an altered conductivity related to the degree of recirculation. Quantitative values of the conductivity of the altered conductivity blood entering the fistula and the conductivity of the blood being withdrawn from the fistula are measured and a difference determined. The determined difference between the conductivities is used to determine a quantitative measurement of the degree of recirculation in the fistula.
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