Armstrong Teasdale LLP
MRI compatible programmable valve pump
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.
Medasys Incorporated
F F G A A A A
F04B F04B G01F A61M A61M A61M A61M
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David Constantin Jason
Morrison Matchey McNally