Infusion Pump Device and Method for Improved Dosing
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 one or more portions of adjustable volume (Vdose,i) to a downstream conduit, and a control unit to control the operation of the infusion pump device, wherein for metering the multitude of portions (Vdose,i) the control unit causes the infusion pump device to carry out the following steps:
- filling the secondary reservoir with liquid medicament from the primary reservoir to a certain adjustable refill level (Vrefill);
metering and conveying at certain points in time (ti) the different portions (Vdose,i) of liquid medicament to the downstream conduit; and
if the secondary reservoir becomes empty, refilling the secondary reservoir and continuing with metering and conveying;
wherein the control unit on a regular basis determines a maximum refill level (VC,max) for the secondary reservoir or retrieves such a maximum refill level (VC,max) from another source, wherein the volumes (Vdose,i) of the one more portions of liquid medicament to be metered and the points in time (ti) at which they are metered and conveyed are independent from the maximum refill level (VC,max), and wherein during the metering of the multitude of portions (Vdose,i), the control unit restricts the filling of the secondary reservoir to a refill level (Vrefill) that is smaller or equal the maximum refill level (VC,max).
2 Assignments
0 Petitions
Accused Products
Abstract
An infusion pump device comprising a primary liquid medicament reservoir, a pump with a secondary reservoir to retrieve medicament from the primary reservoir and to subsequently dose the medicament from the secondary reservoir in adjustable volumes (Vdose,i) to a downstream conduit and a control unit to control the operation of the infusion pump device is presented. For metering the volumes (Vdose,i), the control unit causes the infusion pump device to: (a) determine a maximum refill level (VC,max) for the secondary reservoir, based on external parameters, wherein the maximum refill level does not exceed the maximum capacity of the secondary reservoir; (b) fill the secondary reservoir with medicament from the primary reservoir to the maximum refill level (VC,max); (c) meter and convey the medicament volumes to the downstream conduit; (d) if the secondary reservoir becomes empty, refill the secondary reservoir as in step (b) and continue with step (c).
22 Citations
19 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 one or more portions of adjustable volume (Vdose,i) to a downstream conduit, and a control unit to control the operation of the infusion pump device, wherein for metering the multitude of portions (Vdose,i) the control unit causes the infusion pump device to carry out the following steps:
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filling the secondary reservoir with liquid medicament from the primary reservoir to a certain adjustable refill level (Vrefill); metering and conveying at certain points in time (ti) the different portions (Vdose,i) of liquid medicament to the downstream conduit; and if the secondary reservoir becomes empty, refilling the secondary reservoir and continuing with metering and conveying; wherein the control unit on a regular basis determines a maximum refill level (VC,max) for the secondary reservoir or retrieves such a maximum refill level (VC,max) from another source, wherein the volumes (Vdose,i) of the one more portions of liquid medicament to be metered and the points in time (ti) at which they are metered and conveyed are independent from the maximum refill level (VC,max), and wherein during the metering of the multitude of portions (Vdose,i), the control unit restricts the filling of the secondary reservoir to a refill level (Vrefill) that is smaller or equal the maximum refill level (VC,max). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 19)
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10. A method for operating an infusion pump device comprising a primary reservoir for the liquid medicament, and a pump with a secondary reservoir retrieves liquid medicament from the primary reservoir and subsequently conveys the liquid medicament from the secondary reservoir in one or more portions of adjustable volume (Vdose,i) to a downstream conduit, wherein for metering the multitude of portions (Vdose,i), the method comprises:
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filling the secondary reservoir with liquid medicament from the primary reservoir to a certain adjustable refill level (Vrefill); metering and conveying at certain points in time (ti) the different portions (Vdose,i) of liquid medicament to the downstream conduit; and if the secondary reservoir becomes empty, refilling the secondary reservoir and continuing with metering and conveying, wherein on a regular basis a maximum refill level (VC,max) for the secondary reservoir (14) is determined, or is retrieved from another source, wherein the volumes (Vdose,i) of the one more portions of liquid medicament to be metered and the points in time (ti) at which they are metered and conveyed are independent from the maximum refill level (VC,max), and wherein during the metering of the multitude of portions (Vdose,i) the filling of the secondary reservoir is restricted to a refill level (Vrefill) that is smaller or equal the maximum refill level (VC,max). - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification