Medication delivery system with improved dose accuracy
First Claim
1. A medication delivery device (1) for delivering a specific dose comprising a medication cartridge (11) having an outlet (111) and a piston (112), and means (12) for holding said cartridge, and a piston rod (13) being operable to engage and displace said piston (112), and electrically driven actuating means (15), and driving means (16;
- 161, 162) for transferring movement (150) from said actuating means (15) to said piston rod (13), and memory means (17) for storing data, and processing means (18) for evaluating said data and for controlling said actuating means (15), characterized in that a first set of data (19) describing the actual movement (130) of said piston rod (13) relative to said medication cartridge (11) as a function of the movement (150) of said actuating means (15) is stored in said memory means (17), and the movement (130) of the piston rod (13) governing the delivered dose is controlled by the processing means (18) on the basis of said first set of data (19).
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Accused Products
Abstract
The invention relates to: A medication delivery device (1) for delivering a specific dose comprising a medication cartridge (11) having an outlet (111) and a piston (112), and means (12) for holding said cartridge, and a piston rod (13) being operable to engage and displace said piston, and electrically driven actuating means (15), and driving means (161, 162) for transferring movement from said actuating means to said piston rod, and memory means (17) for storing data, and processing means (18) for evaluating said data and for controlling said actuating means. The object of the present invention is to provide a medication delivery system that combines a relatively high dose accuracy with the use of relatively low quality mechanical components and which enables compensation for built-in non-linearities. The problem is solved in that a first set of data (19) describing the actual movement (130) of said piston rod (13) relative to said medication cartridge (11) as a function of the movement (150) of said actuating means (15) is stored in said memory means (17), and the movement (130) of the piston rod (13) governing the delivered dose is controlled by the processing means (18) on the basis of said first set of data (19). This has the advantage of allowing compensation for mechanical inaccuracies and built-in non-linearities linearities. The invention may e.g. be used in injection or infusion devices for a person'"'"'s self-treatment of a disease such as diabetes.
61 Citations
12 Claims
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1. A medication delivery device (1) for delivering a specific dose comprising a medication cartridge (11) having an outlet (111) and a piston (112), and means (12) for holding said cartridge, and a piston rod (13) being operable to engage and displace said piston (112), and electrically driven actuating means (15), and driving means (16;
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161, 162) for transferring movement (150) from said actuating means (15) to said piston rod (13), and memory means (17) for storing data, and processing means (18) for evaluating said data and for controlling said actuating means (15),
characterized in that a first set of data (19) describing the actual movement (130) of said piston rod (13) relative to said medication cartridge (11) as a function of the movement (150) of said actuating means (15) is stored in said memory means (17), and the movement (130) of the piston rod (13) governing the delivered dose is controlled by the processing means (18) on the basis of said first set of data (19). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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161, 162) for transferring movement (150) from said actuating means (15) to said piston rod (13), and memory means (17) for storing data, and processing means (18) for evaluating said data and for controlling said actuating means (15),
Specification
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- Resources
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Current AssigneeNovo Nordisk A/S
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Original AssigneeNovo Nordisk A/S
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InventorsMunk, Jens Aage
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current604/209
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CPC Class CodesA61M 2005/31518 designed to reduce the over...A61M 2205/33 Controlling, regulating or ...A61M 2205/50 with microprocessors or com...A61M 5/14566 with a replaceable reservoi...
