Apparatus and method for characterization and treatment of tumors

Claim 2

Apparatus for in situ diagnosis and treatment of biological tissue comprising: a probe comprising an elongate member including first and second electrodes, the probe having a first mode of operation in which a parameter indicative of a property of a biological tissue is sensed to enable differentiation among normal biological tissue, malignant tumorous biological tissue, and nonmalignant tumorous biological tissue, and a second mode of operation causing in situ necrosis of the biological tissue; first circuitry coupled to the first electrode for sensing the parameter during the first mode of operation; second circuitry coupled to the second electrode for inducing necrosis of the biological tissue during the second mode of operation; and means for coupling the probe to the first and second circuitries.

Claim 3

Apparatus as defined in claim 1 wherein the elongate member has a distal end and a proximal end and the first and second electrodes are disposed axially at intervals between the distal end and the proximal end.

Claim 4

Apparatus as defined in claim 2 wherein the second circuitry induces necrosis of the biological tissue by supplying a voltage to the second electrode.

Claim 5

Apparatus as defined in claim 2, wherein the first and second electrodes comprise a material selected from the group consisting of platinum, silver, gold, stainless steel, and other biocompatible electrically conductive materials.

Claim 6

Apparatus as defined in claim 1 wherein the probe further comprises a switch for selectively activating either the first or second modes of operation.

Claim 7

Apparatus as defined in claim 1 further comprising: a user interface for providing a sensory indication of the sensed parameter.

Claim 8

Apparatus as defined in claim 6 wherein the user interface provides a sensory indication, during the first mode of operation, corresponding to a degree of vascularity of the biological tissue to enable characterization of the degree of malignancy.

Claim 9

Apparatus as defined in claim 6, wherein the user interface comprises a visual display or an auditory device.

Claim 10

Apparatus as defined in claim 1, wherein the parameter indicative of a property of the biological tissue is selected from the group consisting of electrical impedance and dielectric constant.

Claim 11

Apparatus as defined in claim 1 wherein the probe includes a third electrode coupled to the first circuitry and a fourth electrode coupled to the second circuitry.

Claim 12

A probe for use in situ diagnosis and treatment of biological tissue comprising: a handle; a support member removably connected to the handle; a plurality of electrodes, disposed on the support member, for sensing a parameter indicative of a property of a biological tissue to enable differentiation among normal biological tissue, benign tumorous biological tissue, and malignant tumorous biological tissue; and disposed from the support member, means for causing in situ necrosis of the biological tissue.

Claim 13

A probe for use in situ diagnosis and treatment of biological tissue comprising: a handle; a support member removably connected to the handle; a plurality of electrodes, disposed on the support member, for sensing a parameter indicative of a property of a biological tissue to enable differentiation among normal biological tissue, benign tumorous biological tissue, and malignant tumorous biological tissue; and disposed from the support member, means for causing in situ necrosis of the biological tissue.

Claim 14

Apparatus as defined in claim 11 further comprising a user interface to provide a sensory indication corresponding to a degree of vascularity of the biological tissue to enable characterization of the degree of malignancy.

Claim 15

A probe as defined in claim 11 further comprising a switch, operatively coupled to the plurality of electrodes and the means for causing in situ necrosis, for selectively activating either the plurality of electrodes for sensing or the means for causing in situ necrosis.

Claim 16

A probe as defined in claim 13 wherein the means for causing in situ necrosis comprises a subset of the plurality of electrodes.

Claim 17

A probe as defined in claim 13, wherein the electrodes comprise a material selected from the group consisting of platinum, silver, gold, stainless steel, and other biocompatible electrically conductive materials.

Claim 20

The method of claim 16 wherein the step of characterizing comprises assessing the degree of malignancy of the region.

Claim 21

The method of claim 16, wherein the parameter is selected from a group consisting of electrical impedance and dielectric constant.

Claim 22

The method of claim 16, wherein the step of sensing measures the electrical impedance of the biological tissue at one or more frequencies in the range of 20 kHz to 20 MHz.

Claim 23

The method of claim 16, wherein the step of selectively actuating the probe to cause necrosis induces elevated temperatures in the region of biological tissue.

Claim 24

The method of claim 20, wherein the elevated temperatures are in a range of 60° C. to 100° C.

Claim 25

The method of claim 20, wherein elevated temperatures are induced by passing a radio-frequency electric current through the biological tissue, the electric current having a frequency in a range 100 KHz to 1 MHz.

Claim 26

A probe for use in situ diagnosis and treatment of biological tissue comprising: a handle; a support member removably connected to the handle; at least one electrode, disposed on the support member, for sensing a parameter indicative of a property of a biological tissue to enable differentiation among normal biological tissue, benign tumorous biological tissue, and malignant tumorous biological tissue; and disposed from the support member, means for causing in situ necrosis of the biological tissue.

Claim 27

A probe for use in situ diagnosis and treatment of biological tissue comprising: a handle; a support member removably connected to the handle; at least one electrode, disposed on the support member, for sensing a parameter indicative of a property of a biological tissue to enable differentiation among normal biological tissue, benign tumorous biological tissue, and malignant tumorous biological tissue; and disposed from the support member, means for causing in situ necrosis of the biological tissue.

Claim 28

Apparatus as defined in claim 23 further comprising a user interface to provide a sensory indication corresponding to a degree of vascularity of the biological tissue to enable characterization of the degree of malignancy.

Claim 29

A probe as defined in claim 23 further comprising a switch, operatively coupled to the at least one electrode and the means for causing in situ necrosis, for selectively activating either the at least one electrode for sensing or the means for causing in situ necrosis.

Claim 30

A probe as defined in claim 23, wherein the at least one electrode comprises a material selected from the group consisting of platinum, silver, gold, stainless steel, and other biocompatible electrically conductive materials.

Claim 31

Apparatus for in situ diagnosis and treatment of biological tissue comprising: a first probe comprising an elongate member including a first electrode and a second probe comprising an elongate member including a second electrode, the first and second probes having a first mode of concurrent operation in which a parameter indicative of a property of a biological tissue is sensed to enable differentiation among normal biological tissue, malignant tumorous biological tissue, and nonmalignant tumorous biological tissue, and a second mode of concurrent operation causing in situ necrosis of the biological tissue; first circuitry coupled to the first and second electrodes for sensing the parameter during the first mode of concurrent operation; second circuitry coupled to the first and second electrodes for inducing necrosis of the biological tissue during the second mode of concurrent operation; and means for coupling the first and second probes to the first and second circuitries.

Claim 32

Apparatus for in situ diagnosis and treatment of biological tissue comprising: a first probe comprising an elongate member including a first electrode and a second probe comprising an elongate member including a second electrode, the first and second probes having a first mode of concurrent operation in which a parameter indicative of a property of a biological tissue is sensed to enable differentiation among normal biological tissue, malignant tumorous biological tissue, and nonmalignant tumorous biological tissue, and a second mode of concurrent operation causing in situ necrosis of the biological tissue; first circuitry coupled to the first and second electrodes for sensing the parameter during the first mode of concurrent operation; second circuitry coupled to the first and second electrodes for inducing necrosis of the biological tissue during the second mode of concurrent operation; and means for coupling the first and second probes to the first and second circuitries.

Claim 33

Apparatus as defined in claim 27 wherein the first probe includes a third electrode coupled to the first circuitry and the second probe includes a fourth electrode coupled to the first circuitry.

Claim 34

Apparatus as defined in claim 27 further comprising a switch operatively coupled to the first and second circuitries for selectively activating either the first or second modes of concurrent operation.

Claim 35

Apparatus as defined in claim 27 further comprising a user interface for providing a sensory indication of the sensed parameter.

Claim 36

Apparatus as defined in claim 30 wherein the user interface provides a sensory indication, during the first mode of concurrent operation, corresponding to a degree of vascularity of the biological tissue to enable characterization of the degree of malignancy.

Claim 37

Apparatus as defined in claim 30, wherein the user interface comprises a visual display or an auditory device.

Claim 38

Apparatus as defined in claim 27, wherein the parameter indicative of a property of the biological tissue is selected from the group consisting of electrical impedance and dielectric constant.

Claim 39

Apparatus as defined in claim 27 wherein the second circuitry induces necrosis of the biological tissue by supplying a voltage to the first and second electrodes.

Claim 40

Apparatus as defined in claim 27, wherein the first and second electrodes comprise a material selected from the group consisting of platinum, silver, gold, stainless steel, and other biocompatible electrically conductive materials.