摘要:
This document discusses, among other things, a lead body extending longitudinally along a lead axis, a driver axially displaceable relative to the lead body, and a driven member coupled to the lead body and displaceable away from the lead axis. The driven member at least partially defines an expandable passage having at least one internal dimension. The driver is displaceable into the expandable passage and has at least one outer dimension that is larger than the at least one internal dimension of the expandable passage. An example method includes disposing a first member having a first cross-section in a lead assembly having a lead axis, an expandable passage, and a displaceable member proximate the expandable passage. The method further includes urging the first member into the expandable passage in the lead assembly, and urging the displaceable member away from the lead axis to expand the expandable passage.
摘要:
An implantable lead assembly includes a lead body extending from a proximal end to a distal end having an intermediate portion therebetween, where the lead body includes an insulating layer. A conductor is disposed within the insulating layer and the insulating layer surrounds the conductor. An electrode is coupled to the lead body, and the electrode is in electrical communication with the conductor. At least one conductive sleeve is disposed within the insulating layer. The at least one conductive sleeve surrounds the conductor and is electrically isolated from the electrode. The at least one conductive sleeve has a first impedance value in a first condition.
摘要:
An implantable lead assembly includes a lead body extending from a proximal end to a distal end having an intermediate portion therebetween, where the lead body includes an insulating layer. A conductor is disposed within the insulating layer and the insulating layer surrounds the conductor. An electrode is coupled to the lead body, and the electrode is in electrical communication with the conductor. At least one conductive sleeve is disposed within the insulating layer. The at least one conductive sleeve surrounds the conductor and is electrically isolated from the electrode. The at least one conductive sleeve has a first impedance value in a first condition.
摘要:
Systems and methods for monitoring lung edema fluid status, such as monitoring the presence or absence of pulmonary edema, in a subject using information about responsive acoustic energy echoes from a lung are described. The system comprises, among other things, an implantable device including an acoustic transducer configured to emit acoustic energy to a lung and to receive one or more responsive acoustic energy echoes from a lung. In an example, the implantable device includes a cardiac function management device having an acoustic window in a body thereof. In another example, the implantable device includes one or more subcutaneous leads. An implantable or external processor circuit is configured to receive information about the acoustic energy echoes to compute and provide a lung edema fluid status indication; such information may include an increased number or special pattern of acoustic energy echoes received or a decreased time between successively received echoes.
摘要:
A pacing lead having a lead body configured into a pre-formed J-shape. The lead includes a pacing electrode coupled to an intermediate portion of the lead body and located distally from a bottom of the pre-formed J-shape. The lead is adapted to be placed within a heart in a J-shaped configuration with the electrode positioned proximate a ventricular septum or a right ventricular outflow tract such that at least a portion of the distal end of the lead body is located within a pulmonary artery. In one embodiment, the distal end of the lead is configured to be passively fixated within the pulmonary artery. Another aspect includes a lead body wherein a section of the intermediate portion of the lead body is less stiff than adjacent sections of the lead body. The lead includes a pacing electrode coupled to the intermediate portion of the lead body and located distally from the less stiff section. The lead is adapted to be placed within a heart in a J-shaped configuration with the less stiff section near a bottom of the J-shape such that the electrode is positioned proximate a ventricular septum or a right ventricular outflow tract and at least a portion of the distal end of the lead body is fixated within a pulmonary artery.
摘要:
A lead body includes an electrode coupled to an intermediate portion of the lead body. A distal end of the lead includes a pre-formed, biased shape adapted to passively fixate the distal end of the lead within a pulmonary artery with the electrode positioned in the right ventricle or ventricular outflow tract. The lead body can include a preformed J-shape, with the electrode coupled to the intermediate portion of the lead body and located distally from a bottom of the pre-formed J-shape. The lead body can include a section of the intermediate portion of the lead body being less stiff than adjacent sections of the lead body with the electrode coupled to the intermediate portion of the lead body and located distally from the less stiff section.
摘要:
A pacing lead having a lead body configured into a pre-formed J-shape. The lead includes a pacing electrode coupled to an intermediate portion of the lead body and located distally from a bottom of the pre-formed J-shape. The lead is adapted to be placed within a heart in a J-shaped configuration with the electrode positioned proximate a ventricular septum or a right ventricular outflow tract such that at least a portion of the distal end of the lead body is located within a pulmonary artery. In one embodiment, the distal end of the lead is configured to be passively fixated within the pulmonary artery. Another aspect includes a lead body wherein a section of the intermediate portion of the lead body is less stiff than adjacent sections of the lead body. The lead includes a pacing electrode coupled to the intermediate portion of the lead body and located distally from the less stiff section. The lead is adapted to be placed within a heart in a J-shaped configuration with the less stiff section near a bottom of the J-shape such that the electrode is positioned proximate a ventricular septum or a right ventricular outflow tract and at least a portion of the distal end of the lead body is fixated within a pulmonary artery.
摘要:
A medical device for use with an implantable lead includes a force monitoring system coupled with the device. The force monitoring system monitors force placed on the medical device and/or the lead. Optionally the system compares the force with a preset limit, and notifies a user once the preset limit has been reached.
摘要:
Systems and methods for monitoring lung edema fluid status, such as monitoring the presence or absence of pulmonary edema, in a subject using information about responsive acoustic energy echoes from a lung are described. The system comprises, among other things, an implantable device including an acoustic transducer configured to emit acoustic energy to a lung and to receive one or more responsive acoustic energy echoes from a lung. In an example, the implantable device includes a cardiac function management device having an acoustic window in a body thereof. In another example, the implantable device includes one or more subcutaneous leads. An implantable or external processor circuit is configured to receive information about the acoustic energy echoes to compute and provide a lung edema fluid status indication; such information may include an increased number or special pattern of acoustic energy echoes received or a decreased time between successively received echoes.
摘要:
A pacing lead having a lead body configured into a pre-formed J-shape. The lead includes a pacing electrode coupled to an intermediate portion of the lead body and located distally from a bottom of the pre-formed J-shape. The lead is adapted to be placed within a heart in a J-shaped configuration with the electrode positioned proximate a ventricular septum or a right ventricular outflow tract such that at least a portion of the distal end of the lead body is located within a pulmonary artery. In one embodiment, the distal end of the lead is configured to be passively fixated within the pulmonary artery. Another aspect includes a lead body wherein a section of the intermediate portion of the lead body is less stiff than adjacent sections of the lead body. The lead includes a pacing electrode coupled to the intermediate portion of the lead body and located distally from the less stiff section. The lead is adapted to be placed within a heart in a J-shaped configuration with the less stiff section near a bottom of the J-shape such that the electrode is positioned proximate a ventricular septum or a right ventricular outflow tract and at least a portion of the distal end of the lead body is fixated within a pulmonary artery.