摘要:
Catheters, systems, and methods are provided for performing medical procedures, such as tissue ablation, adjacent the ostia of anatomical vessels, such as pulmonary veins. The catheter comprises an elongated flexible catheter body including a proximal shaft portion and a distal shaft portion, which has a proximal section pre-shaped to form a curve having an apex sized to be inserted into an anatomical vessel, such as a pulmonary vein, and a distal section configured to contact an ostium of the vessel when the curve apex is inserted within the vessel ostium. The catheter further comprises a steering mechanism configured for decreasing a radius of curvature of the curve.
摘要:
Catheters, systems, and methods are provided for performing medical procedures, such as tissue ablation, adjacent the ostia of anatomical vessels, such as pulmonary veins. The catheter comprises an elongated flexible catheter body, which includes a proximal shaft portion and a distal shaft portion, and a tracking element carried by the distal shaft portion. The proximal section is pre-shaped to form a curve having an apex sized to be inserted into the vessel ostium, and a distal section configured to contact the adjacent tissue when the curve apex is inserted within the vessel ostium. The method may comprise inserting the curve apex into the vessel ostium to place the distal section in contact with a first tissue site adjacent the vessel ostium, and determining a location of the tracking element(s) within a coordinate system while the distal section is in contact with the first tissue site.
摘要:
A loop structure for supporting operative elements in contact with bodily tissue including an elongate body. The elongate body may include an area with a preset curvature and/or a hinge area.
摘要:
An implantable tongue sensor/stimulator device is disclosed for sensing and monitoring physiological parameters and providing a reactive stimulation to a patient. The device includes a main upper disc member carrying one or more micro-biomedical sensors for sensing multiple physiological parameters and one or more stimulation electrodes for creating stimulating sensations in the tongue, a lower tongue plate member that includes a battery for powering the device circuitry and a locking mechanism for locking the device in place when it is implanted, and an intermediate assembly including a central tongue rod member and conducting tubes for penetrating a tongue and connecting the upper disc with the lower disc. The device contains a wireless transmitter for transmitting data from the device.
摘要:
A catheter system for creating lesions for the treatment of cardiac arrhythmias is disclosed that includes a catheter having a distal ablation segment that has an electrode array comprising a plurality of spaced ablation and recording electrode devices arranged in a tight loop configuration that is used to create a series of overlapping loop-shaped ablation footprints to produce a continuous lesion resembling a chain-link configuration.
摘要:
A cardiac arrhythmia mapping and ablation catheter has a main catheter that is provided with a loop-shaped mapping and ablation system attached to its distal end in which the loop is optionally adjustable or of relatively fixed shape resumable upon deployment. The loop carries an electrode array including a plurality of separately operable recording (mapping)/ablation electrodes in conductive relation to the external environment and arranged in spaced serial relation along the loop. Insulated conductors connect the electrodes electrically with input/output devices outside the catheter for mapping the electrical activity of the chamber wall contacted and ablating tissue as indicated. A distal extension or guide member may optionally be provided to adapt the loop specifically to addressing the tricuspid annulus or other desired location.
摘要:
A cardiac arrhythmia ablation catheter has a highly flexible tubular distal catheter section for entering and exploring the walls of any cardiac chamber which, in turn, has a distal tip equipped with an electrode system, which may have a specialized shape, for mapping and ablating tissue and a dual-wire biplanar control system for enabling and controlling the movement of the distal catheter section and tip in any direction in a manner such that the distal tip is capable of accessing any point on the wall of the chamber entered. The dual-wire biplanar control system includes a vertical deflection control wire operable to deflect the distal tip of the catheter in a controlled manner a plane substantially parallel to the longitudinal axis of the tubular catheter and a lateral deflection control wire operable to deflect the distal tip of the catheter in a controlled manner in a plane substantially perpendicular to the longitudinal axis of the tubular catheter.
摘要:
An implantable iontophoretic delivery system for use in applying medicinal materials rapidly to specific subcutaneous tissue sites of interest in conjunction with an implanted defibrillator is disclosed which uses a subcutaneously situated pouch for supplying medication in conjunction with a pair of defibrillator electrodes connected to a power source. One of the electrodes is located proximately with respect to the tissue of interest and is designed to dispense the medication of interest utilizing controlled electrical pulses. The pouch is connected with the administering electrode of the electrode system via pumping mechanism.
摘要:
A plurality of catheter-based ablation apparatus embodiments are provided that address several areas of atrial target tissue and which feature firm and consistent ablation element to tissue contact enabling the creation of effective continuous lesions.
摘要:
Catheters and methods are provided for performing medical procedures, such as tissue ablation, adjacent the ostia of anatomical vessels, such as pulmonary veins. The catheter comprises an elongated flexible integrated catheter body having proximal and distal shaft portions and at least one operative element carried by the distal shaft portion. The distal shaft portion has a proximal section configured to be internally actuated (e.g., using a steering mechanism or pre-shaping the proximal section) to form a simple curve with an apex that can be inserted into the vessel ostium, an intermediate section pre-shaped to form a curve that bends opposite the simple curve, and a distal section configured to be placed into a non-radial relationship (tangential or oblique) with the vessel ostium when the apex of the simple curve is inserted into the vessel ostium. By this arrangement, the operative element is configured to be placed firmly in contact with tissue at a predefined radial location relative to the vessel ostium when the apex of the simple curve is inserted into the vessel ostium.