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System and method for energy delivery to tissue while monitoring position, lesion depth, and wall motion

  • US 9,033,885 B2
  • Filed: 10/30/2009
  • Issued: 05/19/2015
  • Est. Priority Date: 10/30/2008
  • Status: Active Grant
First Claim
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1. A method of ablating tissue in a patient as a treatment for fibrillation, said method comprising:

  • providing an ablation device having only a single ultrasound transducer;

    positioning the ablation device adjacent a target tissue;

    moving the ablation device over a surface of the target tissue;

    delivering a collimated beam of ultrasound energy to the target tissue with the single ultrasound transducer;

    sensing energy reflected back from the target tissue with the single ultrasound transducer;

    measuring a gap distance between the single ultrasound transducer and the surface of the target tissue, based on the sensed energy reflected back from the target tissue, while the ablation device moves over the surface of the target tissue, thereby generating a plurality of gap distances;

    mapping the plurality of gap distances measured over the surface of the target tissue, thereby generating a map of the target tissue;

    ablating the target tissue with the collimated beam of ultrasound energy;

    maintaining a gap between the single ultrasound transducer and the target tissue so that there is no contact between the single ultrasound transducer and the target tissue while moving the ablation device, delivering the beam of energy, and sensing the energy reflected back from the target tissue; and

    using the tissue map to plan one or more ablation paths and adjust energy delivery settings.

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