Constant flow medication infusion pump
AssigneeMiniMed Inc.
InventorsWilliam P. Van Antwerp, Susan M. McConnell, Peter C. Lord
Life of this patent
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Abstract
A medication infusion pump includes a housing, a medication chamber defined within the housing, a medication delivery device in fluid communication with the medication chamber, a propellant chamber defined within the housing and adapted to apply a predetermined positive pressure to a medication in the medication chamber, and a non-ozone depleting, non-toxic propellant within the propellant chamber. The propellant preferably has a vapor pressure between about 11 psig and about 50 psig at 37° C.
Claims12
A medication infusion pump comprising
- a) a housing,
- b) a medication chamber defined within said housing,
- c) a medication delivery device in fluid communication with said medication chamber,
- d) a propellant chamber defined within said housing and adapted to apply predetermined positive pressure to a medication within said medication chamber, and
- e) a non-ozone depleting, non-toxic propellant within said propellant chamber.
A medication infusion pump that dispenses a medication at a substantially constant flowrate by application to said medication of a predetermined positive pressure, wherein said pressure is exerted by a non-ozone depleting, non-toxic propellant having a vapor pressure between about 11 psig and about 50 psig at 37° C.
Dependencies are inferred from the claim text.