METHOD AND APPARATUS FOR USING PHONOMYOGRAPHY TO PREVENT NERVE DAMAGE DURING A MEDICAL PROCEDURE
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United States of America Patent
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Issued Date -
Dec 4, 2014
app pub date -
May 29, 2013
filing date -
May 29, 2013
priority date (Note) -
Abandoned
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Abstract
A method and system for preventing phrenic nerve injury during a cardiac ablation procedure. The method generally includes stimulating a phrenic nerve with a pacing electrode at a location proximate a target treatment location, ablating tissue at the target treatment location with a treatment element, obtaining a heart audio signal with an audio sensor positioned proximate the target treatment location, and determining whether phrenic nerve stimulation (PNS) is present based as least in part on the obtained heart audio signal. A processor may be used to compare an amplitude of the obtained heart audio signal to a predetermined threshold amplitude. The processor may determine that PNS is present if the amplitude of the obtained audio signal is greater than the threshold amplitude. If PNS is present, ablation of the tissue may continue at the current or greater energy level and/or at the current treatment location without injuring the phrenic nerve.
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