Lesion assessment by dielectric property analysis
AssigneeNavix International Limited
InventorsYitzhack Schwartz, Yizhaq Shmayahu, Eli Dichterman
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Abstract
Devices and methods for tissue lesion assessment and/or creation based on dielectric properties are disclosed. In some embodiments, one or more probing frequencies are delivered via electrodes including an electrode in proximity to a tissue (for example, myocardial tissue). Measured dielectric properties (such as impedance properties), optionally together with other known and/or estimated tissue characteristics, are used to determine the lesion state of the tissue. In some embodiments, a developing lesion state is monitored during treatment formation of a lesion (for example, ablation of heart tissue to alter electrical transmission characteristics).
Claims51
A method of tissue assessment in vivo, comprising:
- determining at least one dielectric property of a target tissue by analysis of signals having a plurality of frequencies, sensed at a plurality of electrodes positioned intra-body, said analysis combining the contribution of a plurality of frequencies, each measured at a plurality of electrodes;
- and
- estimating a tissue state of said target tissue, based on the determined at least one dielectric property.
A method of tissue assessment, comprising:
- receiving a data structure correlating values of dielectric parameters with values of at least one parameter of a tissue state;
- determining a value of a plurality of dielectric parameters of a target tissue, based on signal output from an electrical circuit comprising a plurality of electrodes positioned intra-body and in proximity to the target tissue;
- estimating a value of at least one parameter of a tissue state, based on the determined value of the plurality of dielectric parameters of the target tissue and the received data structure;
- and
- providing a feedback indicative of said estimate.
Dependencies are inferred from the claim text.