Medical lead designs for lead placement through tissue
First Claim
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1. A medical lead, comprising:
- a lead body that extends from a proximal end to a distal end;
a cardiac pacing electrode coupled to the distal end; and
a pair of tissue fixation elements protruding from the lead body;
wherein the pair of tissue fixation elements are adapted to be embedded within a volume of myocardial tissue to prevent migration of the lead within the myocardium and control the depth of the lead into the volume of myocardial tissue;
wherein the volume of myocardial tissue comprises interventricular tissue;
wherein the cardiac pacing electrode coupled to said distal end is adapted to contact the myocardium at a location spaced from the tissue fixation elements and a portion of the lead body distal to the tissue fixation elements is formed to have a J-shape;
wherein a first of the pair of fixation elements protrudes from the lead body at a location between 10 and 20 millimeters from the distal end.
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Abstract
The invention is directed to medical lead designs that facilitate implantation of the leads through tissue. For example, the leads can implanted though tissue for placement of distal tips of the leads in locations on the opposing side of the tissue. The leads include fixation elements, such as flexible tines, that facilitate fixation to the tissue. The fixation elements can protrude from lead at a location more than 5 millimeters from the distal-tip of the lead such that when the distal tip has passed through the tissue, the fixation elements anchor in the tissue.
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9 Claims
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1. A medical lead, comprising:
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a lead body that extends from a proximal end to a distal end; a cardiac pacing electrode coupled to the distal end; and a pair of tissue fixation elements protruding from the lead body; wherein the pair of tissue fixation elements are adapted to be embedded within a volume of myocardial tissue to prevent migration of the lead within the myocardium and control the depth of the lead into the volume of myocardial tissue; wherein the volume of myocardial tissue comprises interventricular tissue; wherein the cardiac pacing electrode coupled to said distal end is adapted to contact the myocardium at a location spaced from the tissue fixation elements and a portion of the lead body distal to the tissue fixation elements is formed to have a J-shape; wherein a first of the pair of fixation elements protrudes from the lead body at a location between 10 and 20 millimeters from the distal end. - View Dependent Claims (2, 3, 4, 5)
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6. A system comprising:
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an implantable medical device; and an implantable lead including; a lead body that extends from a proximal end to a distal end, the proximal end being coupled to the implantable medical device; a cardiac pacing electrode operatively coupled to the distal end; and a pair of spaced apart tissue fixation elements with a first of the pair protruding from the lead body at a location spaced from the distal end of the lead body, wherein the pair of spaced apart tissue fixation elements are adapted to be embedded in a volume of myocardial tissue to prevent migration of the lead within the myocardium and control the depth of penetration of the lead into the myocardium and wherein said myocardium comprises interventricular tissue; and wherein the cardiac pacing electrode coupled to the distal end is adapted to contact the myocardium at a location spaced from the fixation elements and a portion of the lead body distal to the tissue fixation elements is formed to have a J-shape; wherein the first of the pair of fixation elements protrudes from the lead body at a location between 10 and 20 millimeters from the distal end. - View Dependent Claims (7, 8, 9)
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Specification