Medical device lead including a unifilar coil with improved torque transmission capacity and reduced MRI heating
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United States of America Patent
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Dec 11, 2012
Grant Date -
Dec 30, 2010
app pub date -
May 5, 2010
filing date -
Jun 26, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A conductor assembly for a medical device lead includes a helically coiled conductor including a plurality of turns having a coil pitch and an outer diameter and consisting of one filar having a filar diameter. The coil pitch and outer diameter are selected based on the filar diameter to minimize heating of the helically coiled conductor in the presence of an MRI field. A polymer sheath is formed about the helically coiled conductor such that the coil pitch of the unifilar helically coiled conductor is maintained. The polymer sheath is configured to increase a torque transmitting capacity of the helically coiled conductor.
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