MRI compatible programmable valve pump
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United States of America Patent
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Nov 9, 2010
Issued Date -
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app pub date -
Jul 25, 2008
filing date -
Jul 25, 2008
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Abstract
An implantable drug delivery system utilizing a non-magnetic valve/accumulator metering assembly is disclosed. The solenoids of the prior art, which respond to magnetic fields, are replaced by Shape Memory Alloy (SMA) wires and associated control electronics. By exploiting the inherent characteristics of SMA wires, which can expand and contract based on their temperature, the movements required to actuate the metering assembly can be achieved. This configuration retains the benefits associated with the prior art, while eliminating the major drawback.
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