An electrosurgical device including the disclosure describes an electrosurgical device including an elongated body having a tubular section extending from a proximal end to a distal end and defining an evacuation channel configured to evacuate tissue from the distal end to the proximal end, a curette at the distal end of the tubular section, wherein the curette defines a perimeter cutting edge that forms a distal opening to the evacuation channel, a plasma cutting electrode defined by the perimeter cutting edge of the curette, where the plasma cutting electrode is configured to operate in a monopolar configuration to deliver radio frequency (RF) plasma energy to adjacent tissue to cut a volume of the target tissue, and a dielectric coating on at least a portion of the curette, the dielectric coating electrically insulating the curette from target tissue and the volume of cut target tissue, wherein the dielectric coating comprises a ceramic material.

An apparatus and methods for tissue restoration are provided. The apparatus may include a catheter shaft extending from a proximal end to a distal tip, the catheter shaft defining lumens including an inflation lumen and a light fiber lumen, a coated balloon positioned on a translucent distal segment of the catheter shaft proximal to the distal tip in fluid communication with the inflation lumen, the coated distal balloon comprising a translucent material and a coated material on an outer surface of the coated balloon, and a light fiber positioned in the catheter shaft in the light fiber lumen and extending through the translucent distal segment.

Retrieval of material from vessel lumens can be improved by electrically enhancing attachment of the material to the removal device. The removal device can have a core assembly that includes a hypotube coupled to a first electrical terminal and a pushwire coupled to a second electrical terminal, the pushwire extending through the hypotube lumen. An insulating layer separates the hypotube and the pushwire, and an interventional element is coupled to a distal end of the pushwire. The interventional element can be disposed adjacent to a thrombus. An electrical signal is delivered to the interventional element to promote adhesion of the thrombus to the interventional element. The electrical signal can optionally be a periodic waveform, and the total energy delivered can be between 0.75-24,000 mJ and the peak current delivered via the electrical signal can be between 0.5-5 mA.

A catheter system (100) for treating a treatment site (106) within or adjacent to a vessel wall (108A) or a heart valve includes a light source (124), a first light guide (122A), a second light guide (122A), and an optical alignment system (257). The light source (124) generates light energy (224A, 224B, 324A, 324B, 424B). The first light guide (122A) receives the light energy (224A, 224B, 324A, 324B, 424B) from the light source (124). The first light guide (122A) has a guide proximal end (122P). The second light guide (122A) receives the light energy (224A, 224B, 324A, 324B, 424B) from the light source (124). The second light guide (122A) has a guide proximal end (122P). A multiplexer (223) directs the light energy (224A, 224B, 324A, 324B, 424B) toward the guide proximal end (122P) of the first light guide (122A) and the guide proximal end (122P) of the second light guide (122A). The optical alignment system (257) determines an alignment of the light energy (224A, 224B, 324A, 324B, 424B) relative to at least one of the guide proximal ends (122P). The optical alignment system (257) adjusts the positioning of the light energy (224A, 224B, 324A, 324B, 424B) relative to the at least one of the guide proximal ends (122P) based at least partially on the alignment of the light energy (224A, 224B, 324A, 324B, 424B) relative to the at least one of the guide proximal ends (122P).

A system for use in sealing a portion of pleural layers together includes an electrical energy source, and an electrocautery probe electrically coupled to the electrical energy source. The electrocautery probe has a cannula shaft portion, a distal penetrating tip, and an intermediate portion interposed between the cannula shaft portion and distal penetrating tip. The electrocautery probe is configured to generate heat. A protein source is coupled to the intermediate portion of the electrocautery probe, wherein the protein source has a protein that is denatured by heat.

A catheter includes a shaft, a distal-end assembly, and a plurality of electrodes mounted on the distal-end assembly. The shaft is configured for insertion into an organ of a patient. The distal-end assembly is coupled to a distal end of the shaft and configured to make contact with tissue in the organ. At least an electrode among the electrodes is (i) electrically exposed on at least a portion of a surface of the electrode that makes contact with the tissue and (ii) electrically insulated on at least a portion of the surface of the electrode that faces away from the tissue.

A medical device includes a thermal source that generates heat, a base that has an outer surface and to which the heat from the thermal source is transferred, a first coating that contacts one part of the outer surface of the base and a second coating that is provided on the outer surface of the base, and is exposed and electrically conductive. The second coating supplies, a high-frequency current to an object to be treated. The medical device also includes a laminated portion that includes the first coating in the outer surface of the base extends and a portion of the second coating that is laminated on the first coating.

The present disclosure relates to the field of microwave ablation treatment devices, and in particular, to a microwave ablation needle head and a microwave ablation needle. A microwave ablation needle head, comprising an outer tube, a cooling tube, a coaxial cable, and an electrode. The outer tube comprises a first branch tube and a second branch tube which are sequentially provided in a direction from the distal end to the proximal end of the outer tube, and the end of the first branch tube away from the second branch tube forms the distal end of the outer tube, and the material of the first branch tube is a ceramic material or a polymer material. The cooling tube is provided within the outer tube, the cooling tube and the outer tube are spaced apart from each other, and a first cooling flow channel is formed between the cooling tube and the outer tube, the material of the cooling tube is a polymer material, and the distal end of the cooling tube is located inside the distal end of the first branch tube, so as to form a mounting space in a distal end region of the cooling tube. The microwave ablation needle head can effectively suppress induced currents, and eliminate the effect of induced currents on ablation shapes.

An electrosurgical system includes an RF current generator, a handle body, and an end effector. The end effector may include a first and a second energy delivery surface. At least a portion of either first or second energy delivery surfaces, or both, may include one or more patterned coatings of an electrically non-conducting non-stick material. The material may be deposited on a surface of, within a depression in, or on features extending from the energy surfaces, or through an overmolding process. The patterned coating may be formed from a coating of the material from which portions have been removed. An energy delivery surface has a first area, and the patterned coating has a second area. A ratio of the second area to the first area may be less than or equal to about 0.9, less than or equal to about 0.7, or less than or equal to about 0.5.

Electrosurgical devices are shown with a coated electrode. Electrosurgical devices and methods of use are shown to provide a higher concentration of energy at different resistance regions within a coating. Electrosurgical devices and methods of use are also shown to utilize heat in an electrode contained by a thermally insulative coating to provide a second tissue modification.