System and method for assessing lesions in tissue
First Claim
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1. A system for assessing the formation of lesions in a tissue in a body, comprising:
- an electronic control unit (ECU) configured to(i) acquire values for first and second components of a complex impedance between an electrode and said tissue;
(ii) acquire a value for a predetermined non-impedance variable, said predetermined non-impedance variable being indicative of at least one of a state of said tissue, a state of said electrode, a state of a medical device to which said electrode is coupled, and an interaction between the medical device and said tissue;
(iii) calculate an index responsive to at least said acquired impedance values and said acquired predetermined variable value; and
(iv) process said index to assess lesion formation in a particular area of said tissue.
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Abstract
A method and system for assessing lesion formation in tissue is provided. The system includes an electronic control unit (ECU). The ECU is configured to acquire values for first and second components of a complex impedance between the electrode and the tissue, and to calculate an index responsive to the first and second values. The ECU is further configured to process the ECI to assess lesion formation in the tissue.
204 Citations
24 Claims
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1. A system for assessing the formation of lesions in a tissue in a body, comprising:
an electronic control unit (ECU) configured to (i) acquire values for first and second components of a complex impedance between an electrode and said tissue; (ii) acquire a value for a predetermined non-impedance variable, said predetermined non-impedance variable being indicative of at least one of a state of said tissue, a state of said electrode, a state of a medical device to which said electrode is coupled, and an interaction between the medical device and said tissue; (iii) calculate an index responsive to at least said acquired impedance values and said acquired predetermined variable value; and (iv) process said index to assess lesion formation in a particular area of said tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An article of manufacture, comprising:
a non-transitory computer-readable storage medium having a computer program encoded thereon for assessing the formation of lesions in a tissue in a body, said computer program including code that, when executed on a computer, causes the computer to performing the steps of; (i) receiving first and second location coordinates corresponding to respective first and second locations of an electrode within said body; (ii) calculating a first index responsive to values for first and second components of a first complex impedance between said electrode and said tissue at said first location at a first time; (iii) calculating a second index responsive to values for first and second components of a second complex impedance between said electrode and said tissue at said second location at a second time; (iv) calculating a time change between said first time and said second time, an index change between said first index and said second index over said time change, and a location change between said first location and said second location over said time change; and (v) calculating an index rate by dividing said index change by said location change; and (vi) processing said calculated index rate to assess lesion formation in a particular area of said tissue. - View Dependent Claims (18, 19)
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20. A method of assessing the formation of lesions in a tissue in a body, comprising:
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acquiring values for first and second components of a complex impedance between an electrode and said tissue; acquiring a value for a predetermined variable comprising one of a contact force applied by said electrode against said tissue, a contact pressure applied by said electrode against said tissue, a temperature of said tissue, a change in temperature of said tissue, trabeculation of said tissue, a saline flow rate, and a blood flow rate; calculating an index responsive to at least said values of said first and second components of said complex impedance and said variable; and processing said calculated index to assess lesion formation in particular area of said tissue. - View Dependent Claims (21, 22, 23, 24)
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Specification