Automatic atherectomy system
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United States of America Patent
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-
Apr 3, 2012
Grant Date -
May 26, 2011
app pub date -
Nov 19, 2010
filing date -
May 19, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An automatic atherectomy system uses a rotary burr at the tip of a catheter as a sensing device, in order to measure both electrical conductivity and permittivity of surrounding tissue at multiple frequencies. From these parameters it is determined which tissue lies in different directions around the tip. A servo system steers the catheter tip in the direction of the tissue to be removed. In non-atherectomy applications the rotary burr can be replaced with any desired tool and the system can be used to automatically steer the catheter to the desired position. The steering may be done hydraulically, by pressurizing miniature bellows located near the catheter tip.
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