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公开(公告)号：DE69622557D1
公开(公告)日：2002-08-29
申请号：DE69622557
申请日：1996-05-09
Applicant: DEKA PRODUCTS LP
Inventor： MANNING ROBERT , LARKINS T , HOULE PHILIP , KAMEN L , FAUST VALENTINE
Abstract: An air elimination system is provided for an intravenous fluid delivery system for intravenous injection of fluid into a patient. An air-detection apparatus 5 is disposed in an intravenous fluid line 3. At the top end of the line 3 is attached a chamber 1, 2, 12 where air may be separated from the fluid. The separation chamber may be a drip chamber 12, a metering chamber 2 or the intravenous supply 1. When air is detected, a valve 11 or valves 7, 9 are switched, so that the intravenous fluid is prevented from flowing to the patient, and so that, when a pump 4 is turned on, the fluid is pumped to the separation chamber 1, 2, 12. In a preferred embodiment, the volume of pump's fluid capacity is greater than the volume of the fluid capacity of the intravenous line 31 between the pump 4 and the separation chamber 1, 2, 12, so that the pump can force air back up the intravenous line all the way to the separation chamber.
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公开(公告)号：DE69629562D1
公开(公告)日：2003-09-25
申请号：DE69629562
申请日：1996-05-09
Applicant: DEKA PRODUCTS LP
Inventor： HEINZMANN KURT , LANIGAN RICHARD , LUND PETER , KAMEN L , LARKINS T , MANNING C
Abstract: An intravenous-line flow-control system for receiving a disposable cassette (15) disposed in the intravenous line. The system prevents the free flow of intravenous fluid through the cassette when the cassette is removed from the system. The system includes a control unit. The control unit includes a stepper motor (35) and turning means for turning a rotatable control valve (20) on the cassette in order to restrict variably the flow of fluid through the cassette. This enables the flow of fluid to be prevented when the cassette is removed from the control unit. Furthermore, a plurality of flow-control moduls can be mounted on a stand being electrically interconnected.
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公开(公告)号：DE69622557T2
公开(公告)日：2003-02-13
申请号：DE69622557
申请日：1996-05-09
Applicant: DEKA PRODUCTS LP
Inventor： MANNING ROBERT , LARKINS T , HOULE PHILIP , KAMEN L , FAUST VALENTINE
Abstract: An air elimination system is provided for an intravenous fluid delivery system for intravenous injection of fluid into a patient. An air-detection apparatus 5 is disposed in an intravenous fluid line 3. At the top end of the line 3 is attached a chamber 1, 2, 12 where air may be separated from the fluid. The separation chamber may be a drip chamber 12, a metering chamber 2 or the intravenous supply 1. When air is detected, a valve 11 or valves 7, 9 are switched, so that the intravenous fluid is prevented from flowing to the patient, and so that, when a pump 4 is turned on, the fluid is pumped to the separation chamber 1, 2, 12. In a preferred embodiment, the volume of pump's fluid capacity is greater than the volume of the fluid capacity of the intravenous line 31 between the pump 4 and the separation chamber 1, 2, 12, so that the pump can force air back up the intravenous line all the way to the separation chamber.
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Patent Agency Ranking
公开(公告)号：DE69622714D1
公开(公告)日：2002-09-05
申请号：DE69622714
申请日：1996-05-09
Applicant: DEKA PRODUCTS LP
IPC: F16K5/04 , A61M5/14 , A61M5/142 , A61M5/168 , A61M5/36 , A61M39/00 , F04B43/04 , F16K31/00 , G01N29/036 , G01N29/12
Abstract: A cassette for controlling the flow of IV fluid from a patient to a source. The cassette preferably includes, along the fluid passage through the cassette, first and second membrane-based valves on either side of a pressure-conduction chamber, and a stopcock-type valve. The stopcock valve is preferably located downstream of the second membrane-based valve, which is preferably located downstream of the pressure-conduction chamber. The stopcock control valve preferably has two rigid cylindrical members with complementary surfaces, wherein one member includes a tapered groove defined on its complementary surface. The two complementary surfaces define a space therebetween, instead of having an interference fit, and a resilient sealing member is disposed in this space. When the first and second rigid members are in an open position with respect to each other, the sealing member defines an aperture through which fluid communication is provided between the fluid-path portions defined respectively by the two rigid members. When the first and second rigid members are in the closed position with respect to each other, the sealing member provides a seal preventing flow between the fluid-path portions. The membrane defining the valving chamber of the second membrane-based valve is preferably large and resilient, so that the valving chamber may provide a supply of pressurized intravenous fluid to the patient, when the valve is closed and the stopcock valve provides a restriction downstream of the valve. The pressure-conduction chamber preferably has a membrane that is stable in the empty-chamber position but relatively unstable in the filled-chamber position.\!
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公开(公告)号：DE69622714T2
公开(公告)日：2003-02-06
申请号：DE69622714
申请日：1996-05-09
Applicant: DEKA PRODUCTS LP
IPC: F16K5/04 , A61M5/14 , A61M5/142 , A61M5/168 , A61M5/36 , A61M39/00 , F04B43/04 , F16K31/00 , G01N29/036 , G01N29/12
Abstract: A cassette for controlling the flow of IV fluid from a patient to a source. The cassette preferably includes, along the fluid passage through the cassette, first and second membrane-based valves on either side of a pressure-conduction chamber, and a stopcock-type valve. The stopcock valve is preferably located downstream of the second membrane-based valve, which is preferably located downstream of the pressure-conduction chamber. The stopcock control valve preferably has two rigid cylindrical members with complementary surfaces, wherein one member includes a tapered groove defined on its complementary surface. The two complementary surfaces define a space therebetween, instead of having an interference fit, and a resilient sealing member is disposed in this space. When the first and second rigid members are in an open position with respect to each other, the sealing member defines an aperture through which fluid communication is provided between the fluid-path portions defined respectively by the two rigid members. When the first and second rigid members are in the closed position with respect to each other, the sealing member provides a seal preventing flow between the fluid-path portions. The membrane defining the valving chamber of the second membrane-based valve is preferably large and resilient, so that the valving chamber may provide a supply of pressurized intravenous fluid to the patient, when the valve is closed and the stopcock valve provides a restriction downstream of the valve. The pressure-conduction chamber preferably has a membrane that is stable in the empty-chamber position but relatively unstable in the filled-chamber position.\!
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公开(公告)号：DE69633057T2
公开(公告)日：2005-09-08
申请号：DE69633057
申请日：1996-05-09
Applicant: DEKA PRODUCTS LP
Inventor： LARKINS T , BEAVIS RUSSELL , KAMEN L
Abstract: The flow of an intravenous (IV) fluid from a IV source through an IV line to a patient is controlled, while monitoring whether there is any bubble in the liquid being delivered to the patient. Disposed in the line is a region having a first portion containing a measurement gas and a second portion containing a segment of the liquid flowing through the line. The liquid in this region is tested for the presence of an air bubble. The sum of the first portion's volume and the second portion's volume should be a constant volume. The region is part of an acoustically resonant system, in the volume of the measurement gas in the first portion of the region can be determined from the resonant frequency. Preferably, the acoustically resonant system is tuned so as to prevent the presence of a bubble from significantly affecting the measurement of the volume of the region's first portion. The region should be isolatable from pressure effects in the rest of the line, preferably by means of a first valve that controls flow from the source and a second valve that controls flow to the patient. The resonant system includes at least one speaker and one microphone, arranged so that the resonant frequency of the system can be detected. In addition, some means for changing the pressure of the measurement gas in the resonant system is provided.
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公开(公告)号：DE69633057D1
公开(公告)日：2004-09-09
申请号：DE69633057
申请日：1996-05-09
Applicant: DEKA PRODUCTS LP
Inventor： LARKINS T , BEAVIS RUSSELL , KAMEN L
Abstract: The flow of an intravenous (IV) fluid from a IV source through an IV line to a patient is controlled, while monitoring whether there is any bubble in the liquid being delivered to the patient. Disposed in the line is a region having a first portion containing a measurement gas and a second portion containing a segment of the liquid flowing through the line. The liquid in this region is tested for the presence of an air bubble. The sum of the first portion's volume and the second portion's volume should be a constant volume. The region is part of an acoustically resonant system, in the volume of the measurement gas in the first portion of the region can be determined from the resonant frequency. Preferably, the acoustically resonant system is tuned so as to prevent the presence of a bubble from significantly affecting the measurement of the volume of the region's first portion. The region should be isolatable from pressure effects in the rest of the line, preferably by means of a first valve that controls flow from the source and a second valve that controls flow to the patient. The resonant system includes at least one speaker and one microphone, arranged so that the resonant frequency of the system can be detected. In addition, some means for changing the pressure of the measurement gas in the resonant system is provided.
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公开(公告)号：DE69629562T2
公开(公告)日：2004-02-26
申请号：DE69629562
申请日：1996-05-09
Applicant: DEKA PRODUCTS LP
Inventor： HEINZMANN KURT , LANIGAN RICHARD , LUND PETER , KAMEN L , LARKINS T , MANNING C
Abstract: An intravenous-line flow-control system for receiving a disposable cassette (15) disposed in the intravenous line. The system prevents the free flow of intravenous fluid through the cassette when the cassette is removed from the system. The system includes a control unit. The control unit includes a stepper motor (35) and turning means for turning a rotatable control valve (20) on the cassette in order to restrict variably the flow of fluid through the cassette. This enables the flow of fluid to be prevented when the cassette is removed from the control unit. Furthermore, a plurality of flow-control moduls can be mounted on a stand being electrically interconnected.
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