Negative pressure pump
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United States of America Patent
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-
Sep 4, 2001
Grant Date -
N/A
app pub date -
Feb 19, 1999
filing date -
Feb 19, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A medication infusion pump includes a housing, a medication chamber defined within the housing, means for supplying the medication from the medication chamber to a patient, a reservoir defined within the housing and adapted to apply a predetermined negative pressure to a medication within the medication chamber, and a gas within the reservoir. The gas has a vapor pressure less than ambient atmospheric pressure at normal human physiological temperature, more specifically less than 14.7 psia at 37.degree. C.
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