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.
摘要:
Systems and methods for ablating body tissue use an electrode for contacting tissue to form a tissue-electrode interface. The electrode is coupled to a source of ablation energy for transmitting ablation energy at a prescribed ablation power level into tissue to form, over a prescribed ablation time period, a therapeutic result. The therapeutic result includes a lesion that extends beneath the tissue-electrode interface to a boundary depth between viable and nonviable tissue and a maximum tissue temperature developed within the lesion between the tissue-electrode interface and the boundary depth. The systems and methods include an element to cool the electrode. An input element inputs a desired therapeutic result including at least a targeted lesion boundary depth. The systems and methods employ a processing element that retains a function correlating an observed relationship among lesion boundary depth, ablation power level, ablation time, actual or predicted sub-surface tissue temperature, and electrode temperature. The processing element compares the desired therapeutic result to the function. The processing element selects an operating condition based upon the comparison to achieve the desired therapeutic result without exceeding a prescribed actual or predicted sub-surface tissue temperature, at least in part by cooling the electrode to control electrode temperature while the electrode transmits ablation energy.
摘要:
Enhanced electrical connections for electrodes are provided. In one implementation, an electrode body comprises a first electrically nonconductive layer and a second electrically nonconductive layer overlying at least a portion of the first layer. An intermediate region is formed between the first and second layers. An electrically conductive pathway extends within the intermediate region. An formed opening extends to the intermediate region, exposing a part of the electrically conductive pathway. An electrically conductive material is deposited on the second layer so that a part of the electrically conductive material passes through the opening to establish electrical contact between the electrically conductive material and the electrically conductive pathway.
摘要:
Systems and methods ablate body tissue using an electrode for contacting tissue at a tissue-electrode interface to transmit ablation energy at a determinable power level. The systems and methods include an element to remove heat from the electrode at a determinable rate. The systems and methods employ a processing element to derive a prediction of the maximum tissue temperature condition occurring beneath the tissue-electrode interface. The processing element controls the power level of ablation energy transmitted by the electrode, or the rate at which the electrode is cooled, or both, based, at least in part, upon the maximum tissue temperature prediction.
摘要:
Devices for insertion into an atrial appendage of stasis reducing components such as mesh members, chemical bonding agents or expandable anchors are disclosed.
摘要:
Devices for insertion into an atrial appendage of stasis reducing components such as mesh members, chemical bonding agents or expandable anchors are disclosed.
摘要:
Devices for insertion into an atrial appendage of stasis reducing components such as mesh members, chemical bonding agents or expandable anchors are disclosed.
摘要:
Devices for insertion into an atrial appendage of stasis reducing components such as mesh members, chemical bonding agents or expandable anchors are disclosed.
摘要:
Devices for insertion into an atrial appendage of stasis reducing components such as mesh members, chemical bonding agents or expandable anchors are disclosed.