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US 11,305,111 B2Granted
Medical lead with preformed bias
AssigneeZoll Respicardia, Inc.
InventorsRandy W. Westlund, Mark C. Lynn
Life of this patent
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Abstract
A medical electrical lead and methods of implanting medical electrical leads in lumens. Leads in accordance with the invention employ preformed biases to stabilize the lead within a lumen and to orient electrodes in a preferred orientation.
Claims18
An implantable medical electrical lead comprising:
- a lead body having a preformed converging helical bias extending from a proximal portion to a distal end, wherein a coil diameter decreases from the proximal portion toward the distal end of the helical bias:
- and
- at least one electrode disposed on a distal portion of the lead body and having a length parallel to a lead body portion on which it is disposed, wherein a ratio of a coil diameter to the length of the at least one electrode is greater than or equal to 4:1, where the coil diameter is defined as a diameter of a smallest coil of the converging helical bias.
An implantable medical electrical lead comprising:
- a lead body having a preformed converging helical bias extending from a proximal portion to a distal end, wherein a coil diameter decreases from the proximal portion toward the distal end of the converging helical bias;
- and
- a plurality of electrodes disposed on a distal portion of the lead body and having a length parallel to a lead body portion on which it is disposed, wherein at least a portion of each electrode of the plurality of electrodes is located within a single quadrant of the converging helical bias, wherein at least two of the plurality of electrodes are radially offset from each other;
- and wherein a ratio of the coil diameter to the length of at least one electrode is greater than or equal to 4:1, where the coil diameter is defined as a diameter of a smallest coil of the converging helical bias.
1 more element
A method of implanting a medical electrical lead, the method comprising:
- inserting a lead body in a first lumen, the lead body comprising:
- a lead body having a preformed converging helical bias extending from a proximal portion to a distal end, wherein a coil diameter decreases from the proximal portion toward the distal end of the converging helical bias;
- and
- at least one electrode disposed on a distal portion of the lead body and having a length parallel to a lead body portion on which it is disposed, wherein a ratio of the coil diameter to the length of the at least one electrode is greater than or equal to 4:1, where the coil diameter is defined as a diameter of a smallest coil of the preformed converging helical bias, wherein at least a portion of each of the at least one electrode is within a single quadrant of the preformed converging helical bias;
- and
- positioning the lead within the first lumen at a junction of the first lumen and a second lumen, the first lumen having a first diameter and the second lumen having a second diameter that is less than the first diameter such that the proximal portion of the preformed converging helical bias places a radial fixation force on the first lumen such that the preformed converging helical bias is retained in the junction and such that a tissue of interest is within the quadrant as the quadrant extends outward radially.
3 more elements
Dependencies are inferred from the claim text.