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 including a spool member at least partially disposed in a bore defined in the fluid cartridge, the bore defining an interior volume;
a pump device configured to selectively receive the fluid cartridge and cooperate with the delivery mechanism to deliver fluid from the reservoir to a patient;
a vent inlet port defined in the fluid cartridge extending between the interior volume of the fluid cartridge and the interior volume of the bore;
a vent outlet port defined in the fluid cartridge extending between the interior volume of the bore and an exterior of the fluid cartridge; and
a selectively closeable valve disposed between the interior volume of the fluid cartridge and the exterior of the fluid cartridge, wherein the valve is selectively closeable to control flow of air through one or more of the vent inlet port and the vent outlet port.
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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
20 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 including a spool member at least partially disposed in a bore defined in the fluid cartridge, the bore defining an interior volume; a pump device configured to selectively receive the fluid cartridge and cooperate with the delivery mechanism to deliver fluid from the reservoir to a patient; a vent inlet port defined in the fluid cartridge extending between the interior volume of the fluid cartridge and the interior volume of the bore; a vent outlet port defined in the fluid cartridge extending between the interior volume of the bore and an exterior of the fluid cartridge; and a selectively closeable valve disposed between the interior volume of the fluid cartridge and the exterior of the fluid cartridge, wherein the valve is selectively closeable to control flow of air through one or more of the vent inlet port and the vent outlet port. - 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, and a controller operatively coupled to the drive mechanism; a fluid cartridge operatively coupleable to the housing, the fluid 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 fluid 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 configured to obtain pressure measurements of the second interior volume of the fluid cartridge between the inside surface of the rigid shell and the outside surface of the reservoir; a bore within a body of the delivery mechanism, the bore defining the reservoir inlet port and a vent inlet port in communication with the second interior volume of the fluid cartridge and a dispense port and a vent outlet port in communication with an exterior of the fluid 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 fluid cartridge and the exterior of the fluid cartridge, wherein the valve is selectively closeable to control flow of air through one or more of the vent inlet port and the vent outlet port. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification