METHOD AND APPARATUS FOR NON-INVASIVE TREATMENT OF HYPERTENSION THROUGH ULTRASOUND RENAL DENERVATION
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United States of America Patent
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Issued Date -
Aug 16, 2012
app pub date -
Oct 29, 2010
filing date -
Oct 30, 2009
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Abstract
Non-invasive inactivation of nerve conduction in a treatment region of a mammalian subject as, for example, a region encompassing a renal artery. A therapeutic ultrasound transducer (31) is engaged with the body of the subject outside of the treatment region, preferably with the skin of the subject in proximity to the treatment region (10). The transducer is actuated to transmit therapeutically effective softly focused ultrasound energy at a level which brings tissues throughout a relatively large impact volume (22), desirably 1 cm3 or larger, to a temperature sufficient to inactivate conduction nerves but insufficient to cause rapid necrosis. The impact volume can be aligned with the treatment region using imaging techniques. The treatment can be applied without imaging or precisely locating individual nerves, and can be used, for example, to inactive renal nerves in treatment of hypertension.
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