163 results about "Radiofrequency ablation" patented technology

A robotic system for overlapping radiofrequency ablation (RFA) in tumor treatment is disclosed. The robot assisted navigation system is formed of a robotic manipulator and a control system designed to execute preoperatively planned needle trajectories. Preoperative imaging and planning is followed by interoperative robot execution of the ablation treatment plan. The navigation system combines mechanical linkage sensory units with an optical registration system. There is no requirement for bulky hardware installation or computationally demanding software modules. Final position of the first needle placement is confirmed for validity with the plan and then is used as a reference for the subsequent needle insertions and ablations.

A method of ablating an epicardial tissue region, including positioning a medical device adjacent the epicardial tissue region, the medical device having a first electrode, a second electrode, and a third electrode located in between the first and second electrodes; delivering an irrigation fluid to the tissue region; and ablating at least a portion of the tissue region by sequentially activating the third electrode in a monopolar radiofrequency delivery mode and activating the first and second electrodes in a bipolar radiofrequency delivery mode.

The invention relates generally to methods for inhibiting angiogenesis. More particularly, methods for inhibiting angiogenesis comprise selectively inhibiting phosphoinositide 3-kinase delta (PI3Kδ) activity in endothelial cells. The methods may comprise administration of one or more cytotoxic therapies including but not limited to radiation, chemotherapeutic agents, photodynamic therapies, radiofrequency ablation, anti-angiogenic agents, and combinations thereof.

A thermal ablation system is operable to perform thermal ablation using an x-ray system to measure temperature changes throughout a volume of interest in a patient. Image data sets captured by the x-ray system during a thermal ablation procedure provide temperature change information for the volume being subjected to the thermal ablation. Intermediate image data sets captured during the thermal ablation procedure may be fed into a system controller, which may modify or update a thermal ablation plan to achieve volume coagulation necrosis targets. The thermal ablation may be delivered by a variety of ablation modes including radiofrequency ablation, microwave therapy, high intensity focused ultrasound, laser ablation, and other interstitial heat delivery methods. Methods of performing thermal ablation using x-ray system temperature measurements as a feedback source are also provided.

The present invention relates to an electrode for an electrosurgical unit for the use in ablating and necrosing a living tissue by RF electric energy. The present invention provides an electrode for an electrosurgical unit, including: a hollow electrode formed in an elongated hollow tube shape, a non-insulating region of a predetermined length being formed on one side of which, an insulating region being formed on an outer surface of which other than the non-insulating region; a saline solution circulation structure that supplies pressurized saline solution for cooling a living tissue which is in contact with the hollow electrode from the outside of the living tissue to the inside of the hollow electrode, and discharges the pressurized saline solution from the inside of the hollow electrode to the outside of the living tissue; and one or more saline solution discharge holes formed in the non-insulating region of the hollow electrode to discharge some of the circulating pressurized saline solution to the living tissue which is in contact with the hollow electrode.

A method of ablating a tissue site includes at least two stages. A first stage involves conducting bipolar ablation between a first pair of electrodes situated in an opposing arrangement on opposing sides of the tissue site to form a pair of opposing first stage ablation regions extending from respective sides of the tissue towards the center. A second stage involves conducting bipolar ablation between a second pair of electrodes situated in a diametrical arrangement with respect to the first stage ablation regions, which forms a second stage ablation region intermediate the pair of first stage ablation regions. The second stage completes the ablation through the entire depth of the tissue site. Since the overall process can accommodate incomplete ablation during the first stage, lower power, reduced ablation times or both may be used during the first stage, avoiding overheating and with a decrease in ablated tissue volume.

A surgical rasping and/or shaving system functions in multiple orthopedic applications, including but not limited to shoulder, knee, hip, wrist, ankle, spinal, or other joint procedures. The system may comprise a tissue removal member with a rasping and/or shaving head which may be low profile and offer a flat cutting/rasping/shaving surface, or with a cutting head with at least one cutting edge. The tissue removal member is configured to be driven by an attached hub that translates a rotational movement into a reciprocating motion. Suction for removal of bone fragments or other tissues is provided through an opening spaced apart from or adjacent to the rasping surface. A radiofrequency ablation (RF) electrode may be carried on the system to provide ablation or coagulation of soft tissues.

A system and method are disclosed for planning a percutaneous procedure and for guiding an instrument to engage a target within a patient's body. A patient 3-dimensional image data set is provided, within which a user selects a skin entry point and a target point. A line, or “planned path,” is generated between the points which is used to align a movable arm to achieve a “Bull's Eye View,” in which the two points are superimposed. The instrument is placed at the skin entry point and aligned using the Bull's Eye View along a desired trajectory that intersects the target. Initial alignment is verified using fluoroscopy. Progression fluoroscopic views are used during the insertion procedure to ensure the instrument remains on the planned path. When the instrument reaches the target, a procedure may be performed, such as a biopsy, a drainage procedure, a radiofrequency ablation, or other medical interventional procedure.

A medical treatment system, including a catheter body defining a fluid flow path therethrough; an expandable element disposed on the catheter body, the expandable element defining a cooling chamber therein in fluid communication with the fluid flow path; a plurality of electrodes disposed on the expandable element; a cryogenic fluid source in fluid communication with the fluid flow path; and a radiofrequency energy source in electrical communication with the plurality of electrodes. A method of treating a cardiac tissue site proximate an orifice, including substantially occluding the orifice with an expandable element; powering a plurality of electrodes coupled to the expandable element to reach a predetermined target temperature; circulating a coolant through the expandable element to freeze portions of the cardiac tissue site located between the plurality of electrodes; and ablating the non-frozen portions of the tissue site with the plurality of electrodes.

The present invention discloses an electrode for radiofrequency tissue ablation which can coagulate and necrotize a tissue by radiofrequency electric energy. The electrode for radiofrequency tissue ablation precisely coagulates and necrotizes a target part of the tissue by sensing a temperature of the tissue. The electrode includes a horn-shaped closed end sharpened to its one end, a hollow tube type electrode extended long in the length direction from the other end of the closed end, an insulation member installed on the outer circumference of the hollow electrode except for the part connected to the closed end, at least one temperature sensor installed on the outer circumference of the hollow electrode to be positioned inside the insulation member, for sensing an ambient temperature, and a control unit connected to the hollow electrode and the temperature sensor, for deciding coagulation and necrosis of the tissue according to the temperature sensed by the temperature sensor, and controlling the output supplied to the hollow electrode.