Drug Delivery System with Cartridge Interlock
First Claim
1. A method of priming a drug infusion pump, comprising:
- providing the drug infusion pump having;
a chamber for retaining a cartridge, the chamber having at least one slot on an inner surface;
a piston having at least one projection on an outer surface; and
a motor for moving the piston to deliver a drug from the cartridge; and
providing a cartridge having;
a hollow barrel configured to receive and store a drug, the barrel having at least one tab on an outer surface; and
a plunger slidably inserted into the barrel and movable within the barrel, the plunger having an interlock on a first end;
inserting the cartridge into the chamber of the drug infusion pump;
rotating the cartridge to engage the at least one tab on the barrel with the at least one slot in the chamber to secure the cartridge within the drug infusion pump and to align the interlock with the at least one projection on the piston;
moving the piston toward the cartridge;
sensing a resistive force to indicate that the piston is in contact the plunger; and
engaging the interlock of the plunger with the at least one projection on the piston.
1 Assignment
0 Petitions
Accused Products
Abstract
Described is a drug delivery system and method for priming such drug delivery system so that unwanted delivery of a drug is prevented. In one embodiment, a drug delivery system is provided that includes a drug infusion pump and a cartridge configured for insertion into the drug infusion pump. The cartridge includes a hollow barrel for receiving and storing a drug and a plunger having a first end and a second end. The first end of the plunger is slidably insertable and movable within the barrel. The second end of the plunger is slidably insertable and movable with a chamber of the drug infusion pump. The second end of the plunger also includes an interlock that is passively engaged by a piston within the drug infusion pump during priming to prevent unwanted delivery of the drug.
8 Citations
17 Claims
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1. A method of priming a drug infusion pump, comprising:
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providing the drug infusion pump having; a chamber for retaining a cartridge, the chamber having at least one slot on an inner surface; a piston having at least one projection on an outer surface; and a motor for moving the piston to deliver a drug from the cartridge; and providing a cartridge having; a hollow barrel configured to receive and store a drug, the barrel having at least one tab on an outer surface; and a plunger slidably inserted into the barrel and movable within the barrel, the plunger having an interlock on a first end; inserting the cartridge into the chamber of the drug infusion pump; rotating the cartridge to engage the at least one tab on the barrel with the at least one slot in the chamber to secure the cartridge within the drug infusion pump and to align the interlock with the at least one projection on the piston; moving the piston toward the cartridge; sensing a resistive force to indicate that the piston is in contact the plunger; and engaging the interlock of the plunger with the at least one projection on the piston. - View Dependent Claims (2, 3, 4, 5)
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6. A drug delivery system comprising:
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a drug infusion pump having; a chamber for retaining a cartridge, the chamber having at least one slot on an inner surface; a piston having at least one projection on an outer surface; and a motor for moving the piston to deliver a drug from the cartridge; and a cartridge having; a hollow barrel configured to receive and store a drug, the barrel having at least one tab on an outer surface that engages the at least one slot in the chamber of the drug infusion pump; and a plunger slidably inserted into the barrel and movable within the barrel, the plunger having an interlock on a first end that engages with the at least one projection on the piston. - View Dependent Claims (7, 8, 9, 10)
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11. A drug infusion pump comprising:
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a chamber for retaining a cartridge, the chamber having at least one slot on an inner surface in which at least one tab on the cartridge is engaged; a piston having at least one projection on an outer surface that engages an interlock in the cartridge and the projection is aligned with the interlock; and a motor for moving the piston to deliver a drug from the cartridge. - View Dependent Claims (12, 13)
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14. A cartridge for use in a drug infusion pump, the cartridge comprising:
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a hollow barrel configured to receive and store a drug, the barrel having at least one tab on an outer surface that engages with at least one slot in a chamber of the drug infusion pump; and a plunger slidably inserted into the barrel and movable within the barrel, the plunger having an interlock on a first end for engaging a piston within the drug infusion pump. - View Dependent Claims (15, 16, 17)
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Specification