Methods of shielding implantable medical leads and implantable medical lead extensions
First Claim
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1. An apparatus comprising:
- an implantable medical lead having a most distal proximal contact and a most proximal distal electrode;
a sheath containing a shield layer positioned about the implantable medical lead between the most distal proximal contact and the most proximal distal electrode, the sheath having an outer diameter greater than an outer diameter of the proximal contact and the distal electrode, the sheath also having a proximal end positioned distally of the most distal proximal contact and having a distal end positioned proximally of the most proximal distal electrode; and
an anchoring structure holding the sheath in a fixed position about the implantable medical lead, the anchoring structure comprising a sleeve positioned around an exterior circumference of the sheath so as to overlap a point where the lead exits the sheath to partially directly engage the lead and partially directly engage the sheath and a suture wrapped around an exterior circumference of the sleeve.
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Abstract
Shielded sheaths are placed over implantable medical leads and/or implantable medical lead extensions to provide shielding from electromagnetic energy and to prevent heating at the electrodes. The shielded sheaths include insulative bodies with shield layers such as conductive braided wire or conductive foil tubular structures. The shielded sheath may be implanted at the time of implanting the lead and/or lead extension. The shielded sheath may also be implanted at a later time after the lead and/or lead extension has previously been implanted. The shielded sheath may be anchored onto the lead or lead extension.
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Citations
12 Claims
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1. An apparatus comprising:
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an implantable medical lead having a most distal proximal contact and a most proximal distal electrode; a sheath containing a shield layer positioned about the implantable medical lead between the most distal proximal contact and the most proximal distal electrode, the sheath having an outer diameter greater than an outer diameter of the proximal contact and the distal electrode, the sheath also having a proximal end positioned distally of the most distal proximal contact and having a distal end positioned proximally of the most proximal distal electrode; and an anchoring structure holding the sheath in a fixed position about the implantable medical lead, the anchoring structure comprising a sleeve positioned around an exterior circumference of the sheath so as to overlap a point where the lead exits the sheath to partially directly engage the lead and partially directly engage the sheath and a suture wrapped around an exterior circumference of the sleeve. - View Dependent Claims (2, 3, 4, 5, 12)
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6. An implantable medical system, comprising:
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an implantable stimulation device; an implantable medical lead having a most distal proximal contact and a most proximal distal electrode with the most distal proximal contact being electrically coupled to the implantable stimulation device; a sheath containing a shield layer positioned about the implantable medical lead between the proximal contact and the distal electrode, the sheath having an outer diameter greater than an outer diameter of the proximal contact and the distal electrode, the sheath also having a proximal end positioned distally of the most distal proximal contact and having a distal end positioned proximally of the most proximal distal electrode; and an anchoring structure holding the sheath in a fixed position about the implantable medical lead, the anchoring structure comprising a sleeve positioned around an exterior circumference of the sheath so as to overlap a point where the lead exits the sheath to partially directly engage the lead and partially directly engage the sheath and a suture wrapped around an exterior circumference of the sleeve. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification