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公开(公告)号：US20240186008A1
公开(公告)日：2024-06-06
申请号：US18528305
申请日：2023-12-04
发明人： Oskar Erik Frode Styrbjörn Fallman , Michael Pettersson , Jimmie Marcus Axel Hansson , Per-Olof Borgqvist
CPC分类号： G16H50/20 , A61M1/1565 , A61M1/282 , G06T7/251 , G06T2207/20081
摘要： Systems and methods are disclosed for assessing the functionality of solenoid valve activation in peritoneal dialysis systems. In at least one embodiment, measurements of current values may be received from a solenoid valve at a predetermined sampling rate over a predetermine duration of time to generate a current profile for the solenoid valve. A fifth degree polynomial model may be fit to the current profile and optimized. The optimized polynomial model may be applied to a trained support vector machine to determine whether the current profile indicates that the corresponding solenoid valve has actually opened or closed.
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公开(公告)号：US20240181141A1
公开(公告)日：2024-06-06
申请号：US18528418
申请日：2023-12-04
发明人： Oskar Erik Frode Styrbjörn Fallman , Michael Pettersson , Jimmie Marcus Axel Hansson , Per-Olof Borgqvist
CPC分类号： A61M1/1601 , A61M1/362265
摘要： Systems and methods are disclosed for reducing noise in solenoid valve activation and deactivation in peritoneal dialysis (“PD”) systems. In at least one embodiment, the PD system operates with solenoid valves under the control of a control unit. The control unit takes measures to control the movement of the solenoid valve to minimize the amount of sound that occurs at impact during activation and deactivation of the valve. The measures include the slowing of the movement of the valve plunger within the valve coil. In one aspect, the valve plunger may be slowed down by applying voltage to the valve coil through pulse width modulation (“PWM”).
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公开(公告)号：US20230302207A1
公开(公告)日：2023-09-28
申请号：US18125361
申请日：2023-03-23
CPC分类号： A61M1/1629 , A61M1/80 , A61M1/28 , A61M2205/3368
摘要： A medical fluid system includes a medical fluid pump configured to pump a medical fluid; electronics associated with the medical fluid pump or with other components of the medical fluid system; a thermoelectric heater positioned and arranged to heat medical fluid pumped by the medical fluid pump, the thermoelectric heater including a heated side and a cooled side; a heat exchanger through which medical fluid pumped by the medical fluid pump is heated, the heat exchanger positioned and arranged so as to be in thermal communication with the heated side of the thermoelectric heater; and a mounting plate, the electronics supported by the mounting plate, the mounting plate positioned and arranged so as to be in thermal communication with the cooled side of the thermoelectric heater.
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4.发明公开公开(公告)号：US20230398297A1
公开(公告)日：2023-12-14
申请号：US18333932
申请日：2023-06-13
CPC分类号： A61M5/1723 , A61M1/28 , A61M1/154 , A61M2205/3317
摘要： Systems and methods are disclosed for verifying reference voltage and analog-to-digital converter (“ADC”) values during medical fluid treatment. An example system comprises a control circuit including control ADC devices associated with respective control sensors to facilitate medical fluid treatment; and a protective circuit including protective ADC devices associated with protective sensors, wherein the control circuit and the protective circuit are galvanically isolated from one another; and a computing device having a memory and a processor. The computing device may be configured to initiate a pretreatment that exposes the control sensors and the protective sensors to common pretreatment conditions (e.g., temperature and pressure); receive, during the pretreatment, control ADC values and protective ADC values; and register an error for one or both of the control circuit or the protective circuit based on a comparison of a control ADC value with a protective ADC value.
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5.发明公开公开(公告)号：US20230158220A1
公开(公告)日：2023-05-25
申请号：US17984838
申请日：2022-11-10
CPC分类号： A61M1/282 , A61M5/1723 , A61M2205/3331
摘要： A fluid delivery system includes a fluid pump; a pressure sensor for sensing pressure of fluid pumped by the fluid pump, wherein an output from the pressure sensor varies depending upon whether medical fluid or air is pumped during a pump stroke of the medical fluid pump; and a control unit configured to use the output from the pressure sensor to determine whether medical fluid or air is present during the pump stroke.
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公开(公告)号：US20230070999A1
公开(公告)日：2023-03-09
申请号：US17903366
申请日：2022-09-06
摘要： An inline heating system including an inline heater including a heater element; a control unit configured to cause one of voltage or current to be applied to power the inline heater; and a current or voltage meter positioned and arranged to measure the other of current or voltage at the heater element due to the applied voltage or current, wherein the control unit is further configured to determine a heater element resistance using the applied voltage or current and the measured current or voltage as part of a no flow or low flow condition detection algorithm implemented by the control unit, wherein the voltage or current applied to power the inline heater is stopped if the no flow or low flow condition is detected.
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