Automated means for withdrawing a syringe plunger
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United States of America Patent
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Apr 12, 2005
Grant Date -
Jun 3, 2004
app pub date -
Jun 5, 2003
filing date -
Dec 3, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
In one exemplary embodiment, an automated means for withdrawing a syringe plunger a method for just-in-time extension of the plunger to permit filling the syringe with a prescribed dose of medication are provided. The method includes the steps of: (1) inputting a desired volume of the prescribed dose of medication; (2) inputting syringe identifying information; (3) calculating a distance that the plunger is to be extended based on the inputted desired volume and syringe identifying information; (4) calculating drive parameters for a controllable drive that causes extension of the plunger when actuated and ensures that the plunger is extended the desired distance; and (5) controlling the drive in view of the calculated drive parameters to cause the plunger to be extended the desired distance.
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