Infusion Pump and Method For Improved Filling of a Fluidic System
First Claim
1. An infusion pump device comprising a primary reservoir for liquid medicament, a pump with a secondary reservoir to retrieve liquid medicament from the primary reservoir and to subsequently dose the liquid medicament from the secondary reservoir in incremental steps, a first upstream conduit fluidly connecting the primary reservoir with the pump, a second downstream conduit fluidly connected to the pump for transporting the liquid medicament to an infusion site interface, a valve for alternatingly connecting the pump to one of the conduits, and a control unit to control the operation of the infusion pump device, wherein for filling a fluidic system of the infusion pump device with liquid medicament prior to infusion operation, the control unit causes the infusion pump device to carry out the following steps:
- bringing the pump to an initial state where an inner volume of the secondary reservoir is minimal;
switching the valve to a first state, in which the secondary reservoir is connected to the first conduit and the primary reservoir and retrieving a volume of liquid medicament from the primary reservoir, wherein the retrieved liquid volume Vup is at least equal the inner volume VB of the first upstream conduit, Vup≧
VB;
switching the valve to a second state, in which the secondary reservoir is connected to the second downstream conduit, and expelling the contents in the secondary reservoir into the second downstream conduit;
switching the valve to the first state and retrieving a volume of liquid medicament from the primary reservoir, wherein the retrieved liquid volume VDown is at least equal the inner volume (VD+VE+VF) of the second downstream conduit, VDown≧
(VD+VE+VF);
switching the valve to the second state; and
expelling the contents in the secondary reservoir into the second downstream conduit.
2 Assignments
0 Petitions
Accused Products
Abstract
An infusion pump device and method for filling a fluidic system of the infusion pump with liquid medicament prior to infusion operation is presented. A control unit causes the infusion pump to: (a) bring a pump to an initial state; (b) switch a valve to a first state connecting a secondary reservoir to a first conduit and a primary reservoir; (c) retrieve medicament from the primary reservoir; (d) switch the valve to a second state connecting the secondary reservoir to a second downstream conduit; (e) expel the secondary reservoir contents into the second downstream conduit; (f) switch the valve to the first state; (g) retrieve the primary reservoir medicament; (h) switch the valve to the second state; and (i) expel the secondary reservoir contents into the second downstream conduit by shifting a piston to the initial position.
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Citations
23 Claims
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1. An infusion pump device comprising a primary reservoir for liquid medicament, a pump with a secondary reservoir to retrieve liquid medicament from the primary reservoir and to subsequently dose the liquid medicament from the secondary reservoir in incremental steps, a first upstream conduit fluidly connecting the primary reservoir with the pump, a second downstream conduit fluidly connected to the pump for transporting the liquid medicament to an infusion site interface, a valve for alternatingly connecting the pump to one of the conduits, and a control unit to control the operation of the infusion pump device, wherein for filling a fluidic system of the infusion pump device with liquid medicament prior to infusion operation, the control unit causes the infusion pump device to carry out the following steps:
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bringing the pump to an initial state where an inner volume of the secondary reservoir is minimal; switching the valve to a first state, in which the secondary reservoir is connected to the first conduit and the primary reservoir and retrieving a volume of liquid medicament from the primary reservoir, wherein the retrieved liquid volume Vup is at least equal the inner volume VB of the first upstream conduit, Vup≧
VB;switching the valve to a second state, in which the secondary reservoir is connected to the second downstream conduit, and expelling the contents in the secondary reservoir into the second downstream conduit; switching the valve to the first state and retrieving a volume of liquid medicament from the primary reservoir, wherein the retrieved liquid volume VDown is at least equal the inner volume (VD+VE+VF) of the second downstream conduit, VDown≧
(VD+VE+VF);switching the valve to the second state; and expelling the contents in the secondary reservoir into the second downstream conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 23)
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12. A method for priming an infusion pump device comprising a primary reservoir for liquid medicament, a pump with a secondary reservoir that retrieves liquid medicament from the primary reservoir and subsequently doses the liquid medicament from the secondary reservoir in incremental steps, a first upstream conduit fluidly connecting the primary reservoir with the pump, a second downstream conduit fluidly connected to the pump for transporting the liquid medicament to an infusion site interface, a valve for alternatingly connecting the pump to one of the conduits, and a control unit to control the operation of the infusion pump device, wherein for filling a fluidic system of the infusion pump device with liquid medicament prior to infusion operation the method comprises:
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bringing the pump to an initial state where an inner volume of the secondary reservoir is minimal; switching the valve to a first state, in which the secondary reservoir is connected to the first conduit and the primary reservoir and retrieving a volume of liquid medicament from the primary reservoir, wherein the retrieved liquid volume Vup is at least equal the inner volume VB of the first upstream conduit, Vup≧
VB;switching the valve to a second state, in which the secondary reservoir is connected to the second downstream conduit, and expelling the contents in the secondary reservoir into the second downstream conduit; switching the valve to the first state, and retrieving a volume of liquid medicament from the primary reservoir, wherein the retrieved liquid volume VDown is at least equal the inner volume (VD+VE+VF) of the second downstream conduit, VDown≧
(VD+VE+VF);switching the valve to the second state; and expelling the contents in the secondary reservoir into the second downstream conduit. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification