Abstract: The present disclosure is directed to a surgical navigation system. The navigation system includes an ultrasound device configured to obtain an ultrasound image in a scan plane The ultrasound device has a fiducial pattern disposed thereon. A surgical device having an image capture device configured to capture a fiducial image of the fiducial pattern is also provided. The system also includes a controller configured to receive the ultrasound image and the fiducial image, wherein the controller determines a position of the surgical device in relation to the scan plane based on the fiducial image. A display is configured to display the ultrasound image and a virtual image of the surgical device based on the position of the surgical device in relation to the scan plane.

Abstract: The present disclosure is directed to an ablation planning and navigation system. The planning system includes a memory configured to store a plurality of images and a controller configured to render the plurality of images in three dimensions, automatically segment the plurality of images to demarcate a target area, and automatically determine a treatment plan based on the target area. The navigation system includes an ultrasound device having a fiducial pattern that obtains an ultrasound image, an ablation needle having a image capture device that captures an image of the fiducial pattern, and a controller that receives the ultrasound image and the fiducial image. The controller determines a position of the ablation needle based on the fiducial image. The planning and navigation system also includes a controller that receives data from the planning system and the navigation system and a display configured to display the received information.

Abstract: The present disclosure is directed to a planning and navigation method. The planning and method includes obtaining and rendering a plurality of images. The plurality of images are segmented to demarcate a target area. A treatment plan is determined based on the target area. The navigation method includes obtaining an ultrasound image of a scan plane including the target and obtaining a fiducial image of a fiducial pattern disposed on an ultrasound device. The obtained fiducial image is corrected and a correspondence between the fiducial image and a model image is found. A position of the surgical device is transformed to model coordinates. Then the ultrasound image and a virtual image of the surgical device is displayed to allow a surgeon to navigate the surgical device to the target using the displayed ultrasound image and the virtual image. The target is treated based on the treatment plan.

Abstract: A method for controlling an electrosurgical waveform includes the initial steps of activating an electrosurgical generator and increasing power during a first sample window and determining a direction of change in a first average impedance during the first sample window. The method also includes the steps of performing a first adjustment of power in response to the direction of change in the first average impedance during a subsequent sample window and determining a direction of change in a subsequent average impedance during the subsequent sample window in response to the first adjustment of power. The method also includes performing a subsequent adjustment of power in response to the direction of change in the subsequent average impedance, wherein the subsequent adjustment of power is reverse to that of the first adjustment of power when the direction of change in the first and subsequent average impedances is the same.

Abstract: A method for forming a resonating structure within a body lumen, the method including advancing a flexible microwave catheter into a body lumen of a patient, the flexible microwave catheter including a radiating portion at the distal end of the flexible microwave catheter, the radiating portion configured to receive microwave energy, and at least one centering device proximate the radiating portion configured to deploy radially outward from the flexible microwave catheter; positioning the radiating portion near tissue of interest; deploying the at least one centering device radially outward from the flexible microwave catheter within the body lumen such that a longitudinal axis of the radiating portion is substantially parallel with and at a fixed distance from a longitudinal axis of the body lumen near the targeted tissue; and delivering microwave energy to the radiating portion such that a circumferentially balanced resonating structure is formed with the body lumen.

Abstract: An electrosurgical system and method are disclosed. The system includes an electrosurgical generator adapted to supply electrosurgical energy to tissue. The generator includes sensor circuitry adapted to continuously monitor tissue impedance to generate a variance impedance curve and a microprocessor adapted to calculate a slope of a segment of the variance impedance curve. The microprocessor also calculates a bubble factor that represents the rate of formation and absorption of bubbles within tissue to determine minimum tissue impedance and maximum tissue conductance. The system further includes an electrosurgical instrument which includes one or more active electrodes adapted to apply electrosurgical energy to tissue.

Abstract: A method for controlling an electrosurgical waveform includes the initial steps of activating an electrosurgical generator and increasing power during a first sample window and determining a direction of change in a first average impedance during the first sample window. The method also includes the steps of performing a first adjustment of power in response to the direction of change in the first average impedance during a subsequent sample window and determining a direction of change in a subsequent average impedance during the subsequent sample window in response to the first adjustment of power. The method also includes performing a subsequent adjustment of power in response to the direction of change in the subsequent average impedance, wherein the subsequent adjustment of power is reverse to that of the first adjustment of power when the direction of change in the first and subsequent average impedances is the same.

Abstract: The present disclosure relates to surgical systems including energized/energizable stents, and methods of using the same in the prevention of restenosis. A surgical system for treating a stenosis and/or a restenosis site s provided. The surgical system includes an electrosurgical generator; an energy transmitting conduit connectable to the electrosurgical generator; and a stent positionable in a body lumen at a site of a stenosis. The stent is fabricated from an electrically conductive material and adapted to electrically communicate with the electrosurgical generator, and the energy transmitting conduit delivers electrosurgical energy to the site of the stenosis.

Abstract: A method for controlling energy applied to tissue as a function of at least one detected tissue property includes the initial step of applying energy to tissue. The method also includes the steps of initially adjusting the energy applied to tissue and determining a direction of change of the at least one detected tissue property.

Abstract: The present disclosure relates to surgical systems including energized/energizable stents, and methods of using the same in the prevention of restenosis. A surgical system for treating a stenosis and/or a restenosis site s provided. The surgical system includes an electrosurgical generator; an energy transmitting conduit connectable to the electrosurgical generator; and a stent positionable in a body lumen at a site of a stenosis. The stent is fabricated from an electrically conductive material and adapted to electrically communicate with the electrosurgical generator, and the energy transmitting conduit delivers electrosurgical energy to the site of the stenosis.

Abstract: A method for controlling an electrosurgical waveform includes the initial steps of activating an electrosurgical generator and increasing power during a first sample window and determining a direction of change in a first average impedance during the first sample window. The method also includes the steps of performing a first adjustment of power in response to the direction of change in the first average impedance during a subsequent sample window and determining a direction of change in a subsequent average impedance during the subsequent sample window in response to the first adjustment of power. The method also includes performing a subsequent adjustment of power in response to the direction of change in the subsequent average impedance, wherein the subsequent adjustment of power is reverse to that of the first adjustment of power when the direction of change in the first and subsequent average impedances is the same.

Abstract: A method for controlling energy applied to tissue as a function of at least one detected tissue property includes the initial step of applying energy to tissue. The method also includes the steps of initially adjusting the energy applied to tissue and determining a direction of change of the at least one detected tissue property.

Abstract: An electrosurgical system and method are disclosed. The system includes an electrosurgical generator adapted to supply electrosurgical energy to tissue. The generator includes sensor circuitry adapted to continuously monitor tissue impedance to generate a variance impedance curve and a microprocessor adapted to calculate a slope of a segment of the variance impedance curve. The microprocessor also calculates a bubble factor that represents the rate of formation and absorption of bubbles within tissue to determine minimum tissue impedance and maximum tissue conductance. The system further includes an electrosurgical instrument which includes one or more active electrodes adapted to apply electrosurgical energy to tissue.

Abstract: The present disclosure relates to surgical systems including energized/energizable stents, and methods of using the same in the prevention of restenosis. A surgical system for treating a stenosis and/or a restenosis site s provided. The surgical system includes an electrosurgical generator; an energy transmitting conduit connectable to the electrosurgical generator; and a stent positionable in a body lumen at a site of a stenosis. The stent is fabricated from an electrically conductive material and adapted to electrically communicate with the electrosurgical generator, and the energy transmitting conduit delivers electrosurgical energy to the site of the stenosis.

Abstract: A method for processing a biopotential signal includes detecting a pacing signal, and applying a dynamic filter on a pacing channel based on the detected pacing signal. A method for processing a biopotential signal includes detecting a pacing signal, and automatically obtaining a post-pacing interval based at least in part on the pacing signal.

Abstract: A method for processing a biopotential signal includes detecting a pacing signal, and applying a dynamic filter on a pacing channel based on the detected pacing signal. A method for processing a biopotential signal includes detecting a pacing signal, and automatically obtaining a post-pacing interval based at least in part on the pacing signal.

Abstract: A method for processing a biopotential signal includes detecting a pacing signal, and applying a dynamic filter on a pacing channel based on the detected pacing signal. A method for processing a biopotential signal includes detecting a pacing signal, and automatically obtaining a post-pacing interval based at least in part on the pacing signal.

Abstract: A system and method for programmatically determining interface information for a graphical program. Interface information for a graphical program may include information necessary to invoke execution of the graphical program. A first program may receive a request for information regarding an interface of a graphical program. In response to the request, the first program may programmatically determine the information regarding the interface of the graphical program. The interface information may include such information as parameters of the graphical program, their respective data types, whether each parameter is an input parameter, an output parameter, or both, and default values for input parameters. The programmatically determined information regarding the interface of the graphical program may then be returned to a second program. The second program may invoke execution of the graphical program according to the received information.