Infusion pumps
First Claim
Patent Images
1. An infusion pump apparatus, comprising:
- a medicament cartridge including a medicament reservoir, a plunger, an outlet port and a seal that seals the outlet port; and
an infusion pump assembly includinga housing having a cartridge receiving area,a plunger pusher in the housing,a drive mechanism, that drives the plunger pusher and has a motor, a lead screw, a gear assembly operatively positioned between the motor and the lead screw, and an encoder, anda controller to control the operation of the motor;
wherein the medicament cartridge is insertable through an opening in the housing and into the cartridge receiving area to an inserted position where the plunger is proximate to but spaced from the plunger pusher; and
wherein the controller executes, with the medicament cartridge in the inserted position, a plunger pusher zeroing procedure including causing the motor to advance the plunger pusher to contact the plunger while the seal is sealing the outlet port and then to back the plunger pusher off a predetermined distance from the plunger.
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Accused Products
Abstract
Ambulatory infusion pumps, pump assemblies, cartridges, baseplates, cannulas, insertion tools, and related components as well as combinations thereof and related methods.
275 Citations
22 Claims
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1. An infusion pump apparatus, comprising:
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a medicament cartridge including a medicament reservoir, a plunger, an outlet port and a seal that seals the outlet port; and an infusion pump assembly including a housing having a cartridge receiving area, a plunger pusher in the housing, a drive mechanism, that drives the plunger pusher and has a motor, a lead screw, a gear assembly operatively positioned between the motor and the lead screw, and an encoder, and a controller to control the operation of the motor; wherein the medicament cartridge is insertable through an opening in the housing and into the cartridge receiving area to an inserted position where the plunger is proximate to but spaced from the plunger pusher; and wherein the controller executes, with the medicament cartridge in the inserted position, a plunger pusher zeroing procedure including causing the motor to advance the plunger pusher to contact the plunger while the seal is sealing the outlet port and then to back the plunger pusher off a predetermined distance from the plunger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An infusion pump apparatus, comprising:
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a medicament cartridge including a medicament reservoir, a plunger, an outlet port and a removable seal that seals the outlet port; an infusion pump assembly including a housing having an opening and a cartridge receiving area, a plunger pusher in the housing, and a drive mechanism that drives the plunger pusher and has a motor, a lead screw, a gear assembly operatively positioned between the motor and the lead screw, and an encoder; the medicament cartridge and cartridge receiving area being respectively sized and shaped such that the cartridge is insertable through the opening and into the cartridge receiving area, while the removable seal is sealing the outlet port, to an inserted position where the plunger is proximate to but spaced apart from the plunger pusher; and means for executing a plunger pusher zeroing procedure, while the medicament cartridge is in the inserted position and the removable seal is sealing the outlet port, that causes the motor to advance the plunger pusher that is spaced apart from the plunger into contact with the plunger, that determines that the plunger pusher has contacted the plunger, and in response to a contact determination, that causes the motor to retract the plunger pusher a predetermined distance away from the plunger. - View Dependent Claims (21, 22)
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Specification