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MRI safe, multipolar active fixation stimulation lead with co-radial construction

A technology of wires and electrical wires, applied in the direction of electrodes, heart electrodes, internal electrodes, etc., can solve problems such as blood circulation and cardiac output reduction

Inactive Publication Date: 2012-09-05
CARDIAC PACEMAKERS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some people have irregular heart rhythms called arrhythmias, which can lead to decreased circulation and cardiac output

Method used

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  • MRI safe, multipolar active fixation stimulation lead with co-radial construction
  • MRI safe, multipolar active fixation stimulation lead with co-radial construction
  • MRI safe, multipolar active fixation stimulation lead with co-radial construction

Examples

Experimental program
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Embodiment Construction

[0036] An implantable pulse generator (PG), such as a pacemaker, implantable cardioverter defibrillator (ICD), or cardiac resynchronization (CRT) device, is typically implanted in the patient's chest region. In some cases, multipolar leads may be used with one or more electrodes. The lead may extend from the PG into the atrium and / or ventricle of the patient's heart. In the case of an epicardial lead, for example, the electrodes are attached to the outer surface of the patient's heart. PG can provide pacing capability and / or high voltage shock therapy to the patient's heart to convert the patient's heart from fibrillation to normal cardiac function.

[0037] Bipolar or multipolar wires can be constructed by one of several methods. For example, the guidewire can be coaxial, concentric, or multi-lumen. Coaxial wire employs conductors that are positioned symmetrically around each other in a generally concentric array. Cogs may be constructed with individually insulated wires ...

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PUM

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Abstract

Various embodiments relating to MRI safe, multi-polar active fixation stimulation leads with co-radial construction are disclosed. Some embodiments allow the use of the generally smaller diameter co-radially constructed body (coated wires) to construct an active fixation lead, with an extendable / retractable fixation mechanism. Some embodiments use a connector assembly with an inner terminal ring, a terminal pin partially rotatably positioned within the annular inner terminal ring, and one or more resilient C-clips disposed within circumferential recesses. The resilient C-clips mechanically and electrically couple the inner terminal ring and the terminal ring while substantially limiting relative longitudinal translation of the terminal pin. In some embodiments, the connector assembly can be connected to an electrically inactive torque tube disposed longitudinally within the flexible body of the lead such that rotation of the terminal pin relative to the lead body causes rotation and longitudinal translation of a fixation helix relative to the body.

Description

technical field [0001] Various embodiments of the present invention relate generally to implantable medical devices. More particularly, embodiments of the present invention relate to MRI-safe, multipolar active fixation stimulation leads having a concentric configuration. Background technique [0002] When functioning normally, the human heart maintains its own natural rhythm and is able to pump sufficient blood through the body's circulatory system. However, some people have irregular heart rhythms called arrhythmias, which can lead to decreased blood circulation and cardiac output. One way of treating cardiac arrhythmias involves the use of a pulse generator (PG), such as a pacemaker, an implantable cardioverter defibrillator (ICD), or a cardiac resynchronization (CRT) device. Such devices are typically coupled to a plurality of conductive leads having one or more electrodes that can be used to deliver pacing therapy and / or shocks to the heart. In atrioventricular (AV) ...

Claims

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Application Information

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IPC IPC(8): A61N1/05A61N1/375A61N1/37
CPCA61N1/056A61N1/086
Inventor 阿瑟·J·福斯特詹姆斯·G·本特森
Owner CARDIAC PACEMAKERS INC
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