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US 12,658,323 B2Granted
Dialysis system having a valve functionality assessment
AssigneesVantive US Healthcare LLC, Vantive Health GmbH
InventorsOskar Erik Frode Styrbjörn Fallman, Michael Pettersson, Jimmie Marcus Axel Hansson, Per-Olof Borgqvist
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Abstract
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.
Claims24
A medical fluid system comprising:
- a plurality of valves,
- wherein each valve comprises a housing, a coil, and a plunger,
- wherein each valve is configured to allow a flow of medical fluid through a tube by energizing the corresponding coil to move the corresponding plunger within the corresponding housing, and
- wherein each valve is configured to close the flow of medical fluid through the tube by de-energizing the corresponding coil to move the corresponding plunger in an opposite direction within the corresponding housing to occlude the corresponding tube;
- at least one processor;
- and
- at least one memory storing instructions that, when executed by the at least one processor, cause the at least one processor to:
- receive, during activation of at least one of the plurality of valves, measured current values at a predetermined sampling rate over a predetermined duration,
- generate, based on the respective measured current values for the at least one valve, a current profile for the at least one valve,
- generate, based on the respective current profile for the at least one valve, a polynomial model for the at least one valve, and
- apply, for the at least one valve, the respective polynomial model to a trained classification model to assess an activation status for the valve.
8 more elements
A medical fluid system comprising:
- a plurality of valves,
- wherein each valve comprises a housing, a coil, and a plunger,
- wherein each valve is configured to allow a flow of medical fluid through a tube by energizing the corresponding coil to move the corresponding plunger within the corresponding housing, and
- wherein each valve is configured to close the flow of medical fluid through the tube by de-energizing the corresponding coil to move the corresponding plunger in an opposite direction within the corresponding housing to occlude the corresponding tube;
- at least one processor;
- and
- at least one memory storing instructions that, when executed by the at least one processor, cause the at least one processor to:
- receive, during deactivation of at least one of the plurality of valves, measured current values at a predetermined sampling rate over a predetermined duration,
- generate, based on the respective measured current values for the at least one valve, a current profile for the at least one valve,
- generate, based on the respective current profile for the at least one valve, a polynomial model for the at least one valve, and
- apply, for the at least one valve, the respective polynomial model to a trained classification model to assess a deactivation status for the at least one valve.
8 more elements
A method for assessing the functionality of a solenoid valve activation, the method comprising:
- receiving, by a control unit of a medical fluid system having at least one processor, and during activation of at least one of a plurality of valves controlled by the control unit, measured current values at a predetermined sampling rate over a predetermined duration,
- wherein each valve comprises a housing, a coil, and a plunger,
- wherein each valve is configured to activate a flow of medical fluid through a tube by energizing the corresponding coil to move the corresponding plunger within the corresponding housing, and
- wherein each valve is configured to close the flow of medical fluid through the tube by de-energizing the corresponding coil to move the corresponding plunger in an opposite direction within the corresponding housing to occlude the corresponding tube;
- generating, based on the respective measured current values for the at least one valve, a current profile for the at least one valve;
- generating, based on the respective current profile for the at least one valve, a polynomial model for the at least one valve;
- and
- applying, for the at least one valve, the respective polynomial model to a trained classification model to assess an activation status for the valve.
5 more elements
A method for assessing the functionality of a solenoid valve deactivation, the method comprising:
- receiving, by a control unit of a medical fluid system having at least one processor, and during deactivation of at least one of a plurality of valves controlled by the control unit, measured current values at a predetermined sampling rate over a predetermined duration,
- wherein each valve comprises a housing, a coil, and a plunger,
- wherein each valve is configured to activate a flow of medical fluid through a tube by energizing the corresponding coil to move the corresponding plunger within the corresponding housing, and
- wherein each valve is configured to close the flow of medical fluid through the tube by de-energizing the corresponding coil to move the corresponding plunger in an opposite direction within the corresponding housing to occlude the corresponding tube;
- generating, based on the respective measured current values for the at least one valve, a current profile for the at least one valve;
- generating, based on the respective current profile for the at least one valve, a polynomial model for the at least one valve;
- and
- applying, for the at least one valve, the respective polynomial model to a trained classification model to assess a deactivation status for the valve.
5 more elements
One or more non-transitory computer readable medium storing instructions that, when executed by at least one processor, cause the at least one processor to:
- receive, during activation of at least one of a plurality of valves controlled by a control unit of a medical fluid system, measured current values at a predetermined sampling rate over a predetermined duration,
- wherein each valve comprises a corresponding housing, a corresponding coil, and a corresponding plunger,
- wherein each valve is configured to activate a flow of medical fluid through a tube by energizing the corresponding coil to move the corresponding plunger within the corresponding housing,
- wherein each valve is configured to close the flow of medical fluid through the tube by de-energizing the corresponding coil to move the corresponding plunger in an opposite direction within the corresponding housing to occlude the corresponding tube;
- generate, based on the respective measured current values for the at least one valve, a current profile for the at least one valve;
- generate, based on the respective current profile for the at least one valve, a polynomial model for the at least one valve;
- and
- apply, for the at least one valve, the respective polynomial model to a trained classification model to assess an activation status for the at least one valve.
5 more elements
Dependencies are inferred from the claim text.