METHODS AND DEVICES FOR DETERMINATION OF FLOW RESERVOIR VOLUME
3 Assignments
0 Petitions
Accused Products
Abstract
A novel enhanced infusion pump system is adapted for dispensing medicament from a flow material reservoir software used in conjunction with a pressure sensor can determine a backstroke volume of medicament that can be used to calculate the volume of medicament in the flow material reservoir.
7 Citations
36 Claims
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1-17. -17. (canceled)
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18. An infusion pump system, comprising:
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a cavity; an actuation shaft disposed in the cavity and movable between a first position within the cavity and a second position within the cavity; an input conduit fluidly connectable to a medicament reservoir configured to contain a medicament, the input conduit in fluid communication with a proximal flow space defined by the cavity when the actuation shaft is in both the first position and the second position; a flow metering device chamber in fluid communication with the input conduit through the proximal flow space when the actuation shaft is in the first position for filling the flow metering device chamber with medicament from the medicament reservoir and not in fluid communication with the input conduit when the actuation shaft is in the second position; an output conduit adapted to dispense medicament from the flow metering device chamber when the actuation shaft is in the second position; and a sensor adapted to obtain data for determining a backstroke volume of medicament from the proximal flow space into the medicament reservoir when the actuation shaft is moved from the first position that fills the flow metering device chamber with medicament to the second position that dispenses the medicament from the flow metering device chamber through the output conduit. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An infusion pump system, comprising:
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a cavity defining a proximal flow space; an actuation shaft disposed in the cavity; a flow metering device chamber; a sensor; and a computer processor, the computer processor adapted to; position the actuation shaft in a first position in the cavity such that the flow metering device chamber is in fluid communication with the proximal flow space; cause an aliquot of medicament to flow into the flow metering device chamber from a medicament reservoir through an input conduit and the proximal flow space; position the actuation shaft in a second position in the cavity to dispense the medicament from the flow metering device chamber out an output conduit with the medicament reservoir in fluid communication with the proximal flow space such that positioning of the actuation shaft to the second position causes a backstroke volume of medicament to flow from the proximal flow space into the medicament reservoir; observe a change in volume of the medicament in the medicament reservoir after the actuation shaft is moved to the second position with data gathered from the sensor; and determine the backstroke volume from the data. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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Specification