INFUSION PUMP SYSTEM WITH DISPOSABLE CARTRIDGE HAVING PRESSURE VENTING AND PRESSURE FEEDBACK
First Claim
Patent Images
1. An infusion pump system, comprising:
- 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 disposable fluid cartridge;
a disposable fluid cartridge which may be operatively coupled 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 including 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 with a vent inlet port in communication with the second interior volume;
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 pump body of the delivery mechanism; and
a spool slidingly disposed in the bore having a collapsible first volume which is configured to communicate with the reservoir inlet port and dispense port of the bore independently of each other, and a vent second volume isolated from the first collapsible volume, the vent second volume configured to be moveable between a position that allows a vent inlet port to communicate with a vent outlet port and a position where the vent inlet and outlet ports are isolated from each other.
7 Assignments
0 Petitions
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.
-
Citations
19 Claims
-
1. An infusion pump system, comprising:
-
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 disposable fluid cartridge; a disposable fluid cartridge which may be operatively coupled 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 including 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 with a vent inlet port in communication with the second interior volume; 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 pump body of the delivery mechanism; and a spool slidingly disposed in the bore having a collapsible first volume which is configured to communicate with the reservoir inlet port and dispense port of the bore independently of each other, and a vent second volume isolated from the first collapsible volume, the vent second volume configured to be moveable between a position that allows a vent inlet port to communicate with a vent outlet port and a position where the vent inlet and outlet ports are isolated from each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An infusion pump for dispensing fluid to a patient, comprising:
-
a disposable fluid cartridge including; a delivery mechanism including; a delivery mechanism body, 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; a spool slidingly disposed within the bore including; 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, the first and second seals being axially moveable relative to each other, and a vent second volume which is positionable to overlap the vent inlet port and vent outlet port simultaneously and which is formed by a third seal around the spool, a fourth seal around the spool, an outside surface of the spool between the third and fourth seal and an inside surface of the bore between the third and fourth seal; a collapsible fluid reservoir bounded by a flexible membrane and including an interior volume in fluid communication with the reservoir inlet port, a substantially rigid shell disposed about the collapsible fluid reservoir with an interior volume that contains the collapsible fluid reservoir and a vented volume disposed between an outer surface of the flexible membrane and an interior surface of the rigid shell, the vent inlet port being in fluid communication with the vented volume; a drive mechanism operatively coupled to the spool of the delivery mechanism; a user interface configured to accommodate user data input regarding fluid delivery; a controller having a processor and memory device operatively coupled to the drive mechanism; and a power cell operatively coupled to the controller, the GUI and the drive mechanism. - View Dependent Claims (11, 12)
-
-
13. A method of venting a cartridge of an infusion pump system, comprising:
-
providing an infusion pump system including; a disposable fluid reservoir cartridge including; a delivery mechanism including; a delivery mechanism body, 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; a spool slidingly disposed within the bore including; 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, the first and second seals being axially moveable relative to each other, and a vent second volume which is positionable to overlap the vent inlet port and vent outlet port simultaneously and which is formed by a third seal around the spool, a fourth seal around the spool, an outside surface of the spool between the third and fourth seal and an inside surface of the bore between the third and fourth seal; a collapsible fluid reservoir bounded by a flexible membrane and including an interior volume in fluid communication with the reservoir inlet port, a substantially rigid shell disposed about the collapsible fluid reservoir with an interior volume that contains the collapsible fluid reservoir and a vented volume disposed between an outer surface of the flexible membrane and an interior surface of the rigid shell, the vent inlet port being in fluid communication with the vented volume; a drive mechanism operatively coupled to the spool of the delivery mechanism; 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; driving the spool so as to separate the first and second seals of the collapsible first volume and draw fluid into the first volume through the reservoir inlet port from the reservoir and decrease the pressure within the vented volume; driving the spool with the drive mechanism to a position with the collapsible first volume in communication with the fluid dispense port; 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; driving the spool to a position with the vent second volume in simultaneous communication with the inlet vent port and vent outlet port to allow the vented volume to arrive at the same pressure as the vent outlet port. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
Specification