Apparatus for determining the volume of a bellows reservoir for medication in an implantable infusion system
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United States of America Patent
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Apr 16, 1996
Grant Date -
N/A
app pub date -
Apr 22, 1994
filing date -
Apr 22, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method and apparatus for determining the volume of a bellows reservoir for medication in an infusion system which is implantable in a patient, the pressure in the reservoir is measured and the corresponding volume is determined from a predetermined relationship between pressure and volume. A pressure gauge is disposed for measuring the pressure in the bellows reservoir, and a signal corresponding to the measured pressure is supplied to a memory unit wherein a corresponding volume is determined from the measured pressure value by means of the predetermined relationship between pressure and volume being stored in the memory unit.
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