A method for identifying and treating tissue includes providing an electrosurgical treatment device including an electrode assembly. One or more electrical property values of target tissue are measured. The measured electrical property values of the target tissue are compared against electrical property values of known tissue types. A tissue type of the target tissue is identified. An energy delivery configuration of the electrosurgical treatment device is adjusted to the type of target tissue. The electrosurgical treatment device is activated to treat the target tissue.

An electrosurgical apparatus having a feed structure comprising a radiofrequency (RF) channel for conveying RF electromagnetic (EM) radiation from an RF signal generator to a probe and a microwave channel for conveying microwave EM radiation from a microwave signal generator to the probe, wherein the RF channel and microwave channel comprise physically separate signal pathways, wherein the feed structure includes a combining circuit having an input connected to the signal pathway on the RF channel, another input connected to the signal pathway on the microwave channel, and an output connected to a common signal pathway for conveying the RE EM radiation and EM radiation separately or simultaneously to the probe, and wherein the microwave channel includes a waveguide isolator connected to isolate the signal pathway on the microwave channel from the RF EM radiation.

The device comprises an outer conductor (7) and an inner conductor (9) arranged approximately coaxial with each other. The outer conductor surrounds the inner conductor. The outer conductor (7) and the inner conductor (9) are arranged and configured to generate an electromagnetic field with lines of force extending from a front surface (9A) of the inner conductor (9) to a front surface (7C) of the outer conductor (7). The device further comprises an energy delivery window (13) arranged in front of the outer conductor and the inner conductor.

Methods and computer systems are described that classify a cardiogram as being an atrial fibrillation (AF) or ventricular fibrillation (VF) cardiogram, automatically detect an AF epoch within an AF cardiogram, and automatically detect a VF epoch within a VF cardiogram. A classification and identification (C&I) system includes a classification system, an AF identification system, and a VF identification system. The C&I system processes cardiograms collected from patients to classify the cardiograms as being AF cardiograms or VF cardiograms and to identify AF epochs within the AF cardiograms or VF epochs within the VF cardiograms. The C&I system may then identify an AF source location of an AF based on the AF epochs and a VF source location of a VF based on the VF epochs. The C&I system may display a graphic of a heart that includes an indication of a source location.

A method for determining a change of temperature of an object. The method may include heating an object and measuring scattering parameters (S-parameters) of scattered microwave electric fields from the object. A distorted Born iterative method may be used to determine a change of a dielectric property of the object based on the measured S-parameters. A change of temperature of the object may be determined based on the change of the dielectric property of the object.

A microwave ablation system and method include an elongate microwave ablation probe. The probe has a radiating portion for performing microwave ablation. The probe includes a first electrode and a second electrode located along the probe body. A radiofrequency energy source is connected to the first and second electrodes. An impedance of tissue is measured using the first and second electrodes. The impedance is used to detect a change in tissue due to microwave ablation of the tissue. Therapy parameters for the microwave ablation procedure can be adjusted in response to the measured impedance. In some examples, one of the electrodes is proximal and one electrode is distal to the radiating portion.

Provided is a scissors-type medical treatment tool capable of not only local tissue fixation in an incision/cutting part but also heating on side surfaces of electrodes of a forceps/tweezers type. It has been found out that a tissue part in which tissue is nipped between blades and a tissue part which is brought into abutment against side surfaces of the blades can be heated simultaneously or sequentially by optimizing arrangement of microwave application electrodes and microwave receiver electrodes in a blade pair (in particular, by causing coagulation to be performed evenly on the left and right of the blades), and the present invention has therefore been achieved.

A microwave ablation probe includes a cable comprising an antenna configured to deliver Radio Frequency (RF) energy to a target zone and a cooling path defined by a first channel and a second channel configured to circulate cooling fluid in the probe. The inner tube also comprises a choke formed thereon configured to reduce RF energy reflected away from the antenna.

A method may include positioning a distal portion of a neuromodulation catheter in a first renal vessel of a patient. The distal portion may include a plurality of therapeutic elements arranged around a perimeter of the distal portion. The method also may include imaging the distal portion to visualize positions of the plurality of therapeutic elements; manipulating the distal portion so that at least one therapeutic element is oriented toward a second renal vessel adjacent the first renal vessel; deploying the at least one therapeutic element to extend at least partially through the wall of the first renal vessel such that the at least therapeutic element extends toward the second renal vessel; and delivering a chemical agent through the plurality of therapeutic elements to modulate activity of at least one renal nerve adjacent to the first renal vessel and at least one renal nerve adjacent to the second renal vessel.

A method may include positioning a distal portion of a neuromodulation catheter in a first renal vessel of a patient. The distal portion may include a plurality of therapeutic elements arranged around a perimeter of the distal portion. The method also may include imaging the distal portion to visualize positions of the plurality of therapeutic elements; manipulating the distal portion so that at least one therapeutic element is oriented toward a second renal vessel adjacent the first renal vessel; deploying the at least one therapeutic element to extend at least partially through the wall of the first renal vessel such that the at least therapeutic element extends toward the second renal vessel; and delivering a chemical agent through the plurality of therapeutic elements to modulate activity of at least one renal nerve adjacent to the first renal vessel and at least one renal nerve adjacent to the second renal vessel.