Therapeutic appliance releasing device
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United States of America Patent
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-
Nov 23, 1999
Issued Date -
N/A
app pub date -
Aug 19, 1997
filing date -
Jun 26, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention is a device (10) for releasing a therapeutic appliance, such as an embolic coil (12) inside an aneurysm (16). The device includes a coupling (24) of a shape memory alloy which is responsive to a change in temperature beyond a predetermined transformation point so as to change the shape of the coupling from a first configuration, wherein the coupling receives and holds the proximal end (72) of the coil, to a second configuration wherein the coil can be released from the coupling. An energy receiver (46) is operably associated with the coupling to heat the coupling to a temperature above the transformation point with laser or electrical energy received from an external source.
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