Abstract:
A system for monitoring ablation size is provided. The system includes a power source including a microprocessor for executing one or more control algorithms. A microwave antenna is configured to deliver microwave energy from the power source to tissue to form an ablation zone. A plurality of spaced-apart electrodes is operably disposed along a length of the microwave antenna. The plurality of spaced-apart electrodes is disposed in electrical communication with one another and each of the plurality of spaced-apart electrodes has a threshold impedance associated therewith corresponding to the radius of the ablation zone.
Abstract:
A device comprises an elongated catheter, an expandable balloon associated with the catheter, and a plurality of circumferentially spaced flexible circuits (200) extending longitudinally along a surface of the expandable balloon. The flexible circuits (200) may include a plurality of openings extending through the flexible circuits (200), such openings configured to increase flexibility of the flexible circuits (200).
Abstract:
An apparatus is disclosed for the ablation of biological tissue to produce a therapeutic effect. An adjustment is made to the output frequency of an electrosurgical generator during the ablation cycle to accommodate changes in the electrical properties of the apparatus and the biological tissues that occur as energy is transferred to the tissue. The adjustment is made to better align the source impedance with that of the load.
Abstract:
A joint surgical system includes, a treatment tool, a high-frequency output section which outputs high-frequency energy to the treatment tool, an ultrasonic output section which outputs ultrasonic energy to the treatment tool, a measurement section which measures a temperature of the liquid, and a control section which controls the high-frequency output section to stop output of the high-frequency energy and controls the ultrasonic output section to continue output of the ultrasonic energy when a measurement temperature measured by the measurement section is equal to or higher than a predetermined temperature.
Abstract:
A system and method of breakaway clutching in a computer-assisted medical device includes an articulated arm having one or more first joints and a control unit coupled to the articulated arm and having one or more processors. The control unit operates each of the first joints in multiple states. The multiple states include a locked state, wherein movement of respective first joints is restricted, and a float state, wherein movement of the respective first joints is permitted. The control unit further switches one or more second joints selected from the first joints from the locked state to the float state when a stimulus on the second joints exceeds one or more unlock thresholds and switches the second joints from the float state to the locked state when a velocity of each of the second joints is below one or more lock thresholds.
Abstract:
A high-frequency control unit includes an integration value calculator calculating a measured integration value, which is a measured value of an integration value of an output high-frequency electric power from an output start time, with a passage of time. The high-frequency control unit includes a target locus setting section setting a target locus which indicates, with a passage of time, a target integration value that is a target value of the integration value of the output high-frequency electric power from the output start time, and a controller comparing, with a passage of time, the measured integration value with the target locus, and controlling, with a passage of time, an output state of the high-frequency electric power based on a comparison result.
Abstract:
A method, including selecting a first maximum radiofrequency (RF) power to be delivered by an electrode within a range of 70W - 100W, and selecting a second maximum RF power to be delivered by the electrode within a range of 20W - 60W. The method also includes selecting an allowable force on the electrode within a range of 5g - 50g, selecting a maximum allowable temperature, of tissue to be ablated, within a range of 55°C - 65°C, and selecting an irrigation rate for providing irrigation fluid to the electrode within a range of 8 - 45 ml/min. The method further includes performing an ablation of tissue using the selected values by initially using the first power, switching to the second power after a predefined time between 3s and 6s, and terminating the ablation after a total time for the ablation between 10s and 20s.