摘要:
A catheter for ablating and imaging tissue includes a porous electrode structure comprising an interior region for receiving a conductive medium, an elongate tube having a distal tube end that extends within the interior region, and an ultrasonic transducer assembly housed within the distal tube end.
摘要:
A catheter tube carries an imaging element for visualizing tissue. The catheter tube also carries a support structure, which extends beyond the imaging element for contacting surrounding tissue away from the imaging elements, the imaging element being movable with the support structure. The support element stabilizes the imaging element, while the imaging element visualizes tissue in the interior body region. The support structure also carries a diagnostic or therapeutic component to contact surrounding tissue.
摘要:
The present invention provides ultrasound-guided ablation catheters and methods for their use. In one embodiment, a tissue ablation apparatus (2) includes a flexible elongate body (12) having proximal (14) and distal (12) ends. A plurality of spaced-apart electrodes (24) are operably attached to the flexible body near the distal end. A plurality of transducer elements (28) are disposed between at least some of the electrodes. Transducers assist the physician in determining whether or not the ablation elements are in contact with the tissue to be ablated.
摘要:
Systems and methods for controlling the power supplied to an electrosurgical probe. The systems and methods may be used to monitor electrode-tissue contact, adjust power in response to a loss of contact, and apply power in such a manner that charring, coagulum formation and tissue popping are less likely to occur.
摘要:
Systems and methods for acquiring and analyzing electrograms in myocardial tissue are disclosed and described. One such method includes deploying a three dimensional, radially expanded array of multiple electrodes in operative association with a region of heart tissue; acquiring a sample of a cardiac event by placing the heart at a predetermined location using the multiple electrodes, while conditioning the multiple electrodes to sense paced electrograms occurring in the tissue region during pacing; and electronically comparing the sample to a template of a cardiac event of known diagnosis and generating an output based upon the comparison, whereby the output provides a diagnostic indicator based upon pacing.
摘要:
Electrode assemblies and associated systems employ a nonporous wall having an exterior for contacting tissue. The exterior peripherally surrounds an interior area. The wall is essentially free of electrically conductive material. The wall is adapted to assume an expanded geometry having a first maximum diameter and a collapsed geometry having a second maximum diameter less than the first maximum diameter. The assemblies and systems include a lumen that conveys a medium containing ions into the interior area. An element free of physical contact with the wall couples the medium within the interior area to a source of electrical energy to enable ionic transport of electrical energy from the source through the medium to the wall for capacitive coupling to tissue contacting the exterior of the wall.
摘要:
An interface, used in association with an electrode structure deployed in contact with heart tissue, generates a display comprising an image of the electrode structure at least partially while performing a therapeutic or diagnostic procedure. The interface annotates the image in response to procedure events.
摘要:
A system records use of a structure deployed in operative association with heart tissue in a patient. An image controller generates an image of the structure while in use in the patient. An input receives data including information identifying the patient. An output processes the image in association with the data as a patient-specific, data base record for storage, retrieval, or manipulation.
摘要:
Systems and associated methods form larger and deeper lesion patterns by shaping a support body with multiple electrodes in ways that increase the density of the electrodes per given tissue area. The support body can carry either elongated, continuous electrodes or arrays of non-contiguous, segmented electrodes.
摘要:
Systems and methods well suited for use in catheter-based tissue ablation systems employ thermocouples for temperature sensing. The systems and methods combine accuracy with compact, low profile construction.