INFUSION PUMP SYSTEM WITH DISPOSABLE CARTRIDGE HAVING PRESSURE VENTING AND PRESSURE FEEDBACK
First Claim
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1. An ambulatory infusion system, comprising:
- a fluid cartridge including a collapsible reservoir for containing a fluid and a substantially rigid shell disposed over the collapsible reservoir and forming an interior volume between an outside surface of the collapsible reservoir and an inside surface of the shell;
a delivery mechanism at least partially disposed in a bore defined in the cartridge, the bore defining an interior volume;
a pump device configured to selectively receive the infusion cartridge and cooperate with the delivery mechanism to deliver fluid from the reservoir to a patient;
a vent inlet port defined in the cartridge extending between the interior volume of the cartridge and the interior volume of the bore;
a vent outlet port defined in the cartridge extending between the interior volume of the bore and an exterior of the cartridge; and
a selectively closeable valve disposed between the interior volume of the cartridge and the exterior of the cartridge.
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Abstract
Systems and methods of venting a cartridge of an infusion pump system are disclosed. The system can be actively vented. A interior volume of the system can be actively vented at times when a drive mechanism of the system is inactive. Such an active venting system can include a valve that seals a volume of the cartridge that can be vented from the ambient when pressure measurements in the cartridge are made by a pressure sensor for greater measurement and calculation accuracy.
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Citations
19 Claims
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1. An ambulatory infusion system, comprising:
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a fluid cartridge including a collapsible reservoir for containing a fluid and a substantially rigid shell disposed over the collapsible reservoir and forming an interior volume between an outside surface of the collapsible reservoir and an inside surface of the shell; a delivery mechanism at least partially disposed in a bore defined in the cartridge, the bore defining an interior volume; a pump device configured to selectively receive the infusion cartridge and cooperate with the delivery mechanism to deliver fluid from the reservoir to a patient; a vent inlet port defined in the cartridge extending between the interior volume of the cartridge and the interior volume of the bore; a vent outlet port defined in the cartridge extending between the interior volume of the bore and an exterior of the cartridge; and a selectively closeable valve disposed between the interior volume of the cartridge and the exterior of the cartridge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An infusion pump system, comprising:
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a pump device including a housing, a drive mechanism with a motor, a controller operatively coupled to the drive mechanism and a slot configured to accept a fluid cartridge; a fluid cartridge operatively coupleable to the housing, the cartridge including a delivery mechanism, a collapsible reservoir having an interior volume surrounded by a flexible fluid tight membrane, the interior volume being in fluid communication with a reservoir inlet port, the cartridge also comprising a substantially rigid shell disposed over the reservoir and forming a second interior volume between an outside surface of the reservoir and an inside surface of the rigid shell; a pressure sensor disposed between an interior surface of the rigid case and an exterior surface of the collapsible reservoir shell; a bore within a body of the delivery mechanism defining an interior volume, the bore further defining the reservoir inlet port and a vent inlet port in communication with the second interior volume of the cartridge and a dispense port and a vent outlet port in communication with an exterior of the cartridge; a spool slidingly disposed in the bore having a collapsible first volume which is configured to communicate with the reservoir inlet port and the dispense port of the bore independently of each other, the spool further defining a vent second volume positionable to overlap the vent inlet port and the vent outlet port simultaneously; and a selectively openable and closeable valve disposed between the second interior volume of the cartridge and the exterior of the cartridge. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification