The patent's assignee for patent number 8634931 is
News editors obtained the following quote from the background information supplied by the inventors: "Existing implantable medical leads for use with implantable pulse generators, such as neurostimulators, pacemakers, defibrillators or implantable cardioverter defibrillators ('ICD'), are prone to heating and induced current when placed in the strong magnetic (static, gradient and RF) fields of a magnetic resonance imaging ('MRI') machine. The heating and induced current are the result of the lead acting like an antenna in the magnetic fields generated during a MRI. Heating and induced current in the lead may result in deterioration of stimulation thresholds or, in the context of a cardiac lead, even increase the risk of cardiac tissue damage and perforation.
"Over fifty percent of patients with an implantable pulse generator and implanted lead require, or can benefit from, a MRI in the diagnosis or treatment of a medical condition. MRI modality allows for flow visualization, characterization of vulnerable plaque, non-invasive angiography, assessment of ischemia and tissue perfusion, and a host of other applications. The diagnosis and treatment options enhanced by MRI are only going to grow over time. For example, MRI has been proposed as a visualization mechanism for lead implantation procedures.
"There is a need in the art for an implantable medical lead configured for improved MRI safety. There is also a need in the art for methods of manufacturing and using such a lead."
As a supplement to the background information on this patent, NewsRx correspondents also obtained the inventors' summary information for this patent: "An implantable medical lead is disclosed herein. In one embodiment, the lead includes a body and an electrical pathway. The body may include a distal portion with an electrode and a proximal portion with a lead connector end. The electrical pathway may extend between the electrode and lead connector end and include a coiled inductor including a first portion and a second portion at least partially magnetically decoupled from the first portion. The first portion may include a first configuration having a first SRF. The second portion may include a second configuration different from the first configuration. The second configuration may have a second SRF different from the first SRF. For example, the first SRF may be near 64 MHz and the second SRF may be near 128 MHz.
"An implantable medical lead is disclosed herein. In one embodiment, the lead includes a body and an electrical pathway. The body may include a distal portion with an electrode and a proximal portion with a lead connector end. The electrical pathway may extend between the electrode and lead connector end and include a coiled inductor including a coiled inductor including a magnetic shielding layer dividing the coiled inductor into a proximal region and a distal region at least partially magnetically decoupled from the proximal region. The proximal region may have a SRF that is different from a SRF of the distal region.
"Also, the SRF for the proximal region and the SRF for the distal region may be selected from a variety of frequencies, such as, for example, frequencies for common MRI scans like approximately 64 MHz and approximately 128 MHz. The magnetic shielding layer may have at least one of a ring and disc configuration, and may be made of at least one of a non-magnetic metal and a polymer loaded with a non-magnetic metal.
"An implantable medical lead is disclosed herein. In one embodiment, the lead includes a body, a first electrical pathway, a second electrical pathway, and a magnetic shielding layer. The body may include a distal portion and a proximal portion. The distal portion may include a tip electrode and a ring electrode proximal of the tip electrode. The proximal portion may include a lead connector end. The first electrical pathway may extend between the tip electrode and lead connector end and include a first inductor. The second electrical pathway may extend between the ring electrode and lead connector end and include a second inductor. The magnetic shielding layer may at least partially magnetically decoupling the first inductor from the second inductor.
"While multiple embodiments are disclosed, still other embodiments of the present invention will become apparent to those skilled in the art from the following Detailed Description, which shows and describes illustrative embodiments of the invention. As will be realized, the invention is capable of modifications in various aspects, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not restrictive."
For additional information on this patent, see: Min, Xiaoyi; Moulder,
Keywords for this news article include: Treatment,
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