INFUSION PUMP SYSTEM WITH DISPOSABLE CARTRIDGE HAVING PRESSURE VENTING AND PRESSURE FEEDBACK
First Claim
Patent Images
1. A portable infusion pump system, comprising:
- (a) a pump device configured to accept a disposable fluid cartridge and including a housing, a drive mechanism with a motor, and a controller operatively coupled to the drive mechanism;
(b) a disposable fluid cartridge configured to be operatively coupled to the housing, the cartridge including;
(i) 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,(ii) a substantially rigid shell disposed over the collapsible reservoir and forming a second interior volume between an outside surface of the collapsible reservoir and an inside surface of the substantially rigid shell with a vent inlet port in communication with the second interior volume, and(iii) a delivery mechanism including a bore within a pump body of the delivery mechanism, a spool slidingly disposed in the bore forming a collapsible first volume which is configured to communicate with the reservoir inlet port and a dispense port of the bore independent of reservoir inlet port; and
(c) a pressure sensor in communication with the volume between an interior surface of the rigid shell and an exterior surface of the collapsible reservoir.
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Accused Products
Abstract
Embodiments are directed to portable infusion devices, systems, and methods of using the same for dispensing materials. In some cases, the devices, systems and methods may be used for infusing a material such as medicament, e.g., insulin, into a body in need thereof.
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Citations
26 Claims
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1. A portable infusion pump system, comprising:
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(a) a pump device configured to accept a disposable fluid cartridge and including a housing, a drive mechanism with a motor, and a controller operatively coupled to the drive mechanism; (b) a disposable fluid cartridge configured to be operatively coupled to the housing, the cartridge including; (i) 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, (ii) a substantially rigid shell disposed over the collapsible reservoir and forming a second interior volume between an outside surface of the collapsible reservoir and an inside surface of the substantially rigid shell with a vent inlet port in communication with the second interior volume, and (iii) a delivery mechanism including a bore within a pump body of the delivery mechanism, a spool slidingly disposed in the bore forming a collapsible first volume which is configured to communicate with the reservoir inlet port and a dispense port of the bore independent of reservoir inlet port; and (c) a pressure sensor in communication with the volume between an interior surface of the rigid shell and an exterior surface of the collapsible reservoir. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A portable infusion pump system for dispensing fluid to a patient, comprising:
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(1) a disposable fluid cartridge including; (a) a delivery mechanism including; (i) a delivery mechanism body, (ii) a bore disposed in the delivery mechanism body including a distal end, a proximal end disposed towards a drive mechanism of the infusion pump, an interior volume, a reservoir inlet port, and a fluid dispense port, (iii) a spool slidingly disposed within the bore, and (iv) a collapsible first volume which is positionable to overlap the reservoir inlet port independent of an overlap of the fluid dispense port and which is formed between a first seal around the spool, a second seal around the spool, an outer surface of the spool body between the first and second seal and an interior surface of the bore between the first and second seal; and
wherein the first and second seals are axially moveable relative to each other;(b) a collapsible reservoir bounded by a flexible membrane and including an interior volume in fluid communication with the reservoir inlet port; and (c) a substantially rigid shell disposed about the collapsible reservoir with an interior volume that contains the collapsible reservoir and a volume disposed between an outer surface of the flexible membrane and an interior surface of the rigid shell; (2) a drive mechanism operatively coupled to the spool of the delivery mechanism; (3) a graphic user interface configured to accommodate user data input regarding fluid delivery; (4) a controller having a processor and memory device operatively coupled to the drive mechanism; and (5) a power cell operatively coupled to the controller, the graphic user interface and the drive mechanism. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A delivery mechanism for a portable infusion pump system, comprising:
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a bore disposed in a delivery mechanism body; a spool disposed in the bore which is axially displaceable within the bore; and a collapsible volume bounded by an outside surface of the spool, an inside surface of the bore, a first seal between the spool and the bore that is axially fixed relative to the spool but displaceable relative to an inside surface of the bore and a second seal between the spool and inside surface of the bore which is configured to slide over a slide portion of the spool, which forms a fluid tight but displaceable seal between an outside surface of the second seal and the inside surface of the bore and which forms a fluid tight but displaceable seal between an outside surface of the slide portion of the spool and aperture of the second seal. - View Dependent Claims (19, 20, 21, 22)
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23. A method of dispensing a fluid from a portable infusion pump system, comprising:
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(A) providing an infusion pump system including; (1) a disposable fluid reservoir cartridge including; (a) a delivery mechanism including; (i) a delivery mechanism body, (ii) a bore disposed in the delivery mechanism body including a distal end, a proximal end disposed towards a drive mechanism of the infusion pump, an interior volume, a reservoir inlet port, a fluid dispense port, a vent inlet port and a vent outlet port, and (iii) a spool slidingly disposed within the bore, and (iv) a collapsible first volume which is positionable to overlap the reservoir inlet port independent of an overlap of the fluid dispense port and which is formed between a first seal around the spool, a second seal around the spool, an outer surface of the spool body between the first seal and second seal and an interior surface of the bore between the first seal and second seal; and
wherein the first and second seals are axially moveable relative to each other;(b) a collapsible reservoir bounded by a flexible membrane and including an interior volume in fluid communication with the reservoir inlet port, and (c) a substantially rigid shell disposed about the collapsible reservoir with an interior volume that contains the collapsible reservoir and a volume disposed between an outer surface of the flexible membrane and an interior surface of the rigid shell; and (2) a drive mechanism operatively coupled to the spool of the delivery mechanism; (B) initiating a dispense cycle by driving the spool with the drive mechanism to a position with the collapsible first volume in communication with the reservoir inlet port; (C) driving the spool so as to separate the first and second seals of the collapsible first volume and draw fluid into the collapsible first volume through the reservoir inlet port from the collapsible reservoir; (D) driving the spool with the drive mechanism to a position with the collapsible first volume in communication with the fluid dispense port; and (E) driving the spool so as to at least partially collapse the collapsible first volume and dispense fluid from the collapsible first volume through the fluid dispense port. - View Dependent Claims (24, 25, 26)
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Specification