MEDICAL LEADS HAVING A DISTAL BODY AND AN OPENLY COILED FILAR

• US 20150133955A1
• Filed: 01/29/2013
• Published: 05/14/2015
• Est. Priority Date: 04/19/2012
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Bonde, Eric H., Falkner, Phillip C., Hegland, Michael T., Stolz, Brian T., Wells, Patrick D.
• Granted Patent: US 10,086,191 B2
• Time in Patent Office: Days
• US Class Current: 606/129
• CPC Class Codes: A61B 17/3468 for implanting or removing devices, e.g. prostheses, implants, seeds, wires devices for implanting seeds A61M37/0069
• CPC Class Codes: A61N 1/05 for implantation or insertion into the body, e.g. heart electrode A61N1/06 takes precedence
• CPC Class Codes: A61N 1/0558 Anchoring or fixation means therefor
• CPC Class Codes: A61N 1/057 Anchoring means; Means for fixing the head inside the heart

Abstract

Medical leads have one or more openly coiled filars and a distal body coupled to the openly coiled filars. The openly coiled filars provide a lead with compliance and elasticity while the distal body provides the firmness needed for placement and support of the electrodes. The openly coiled filars may transition to a linear distal portion that extends to the distal body, and the distal body may have proximal tines that fold proximally to become adjacent to the linear distal portion of the filars. The openly coiled filars may instead extend to the distal body and the proximal tines may be laterally arced to then fold against the lateral surface of the coiled filars. The tines may fold distally during explantation to allow the distal body to release and exit the body.

Claims

1. A medical lead, comprising:

a filar with an openly coiled central portion;

a distal body having an electrode, with a distal portion of the filar passing through the distal body and being coupled to the electrode.

2. The medical lead of claim 1, further comprising a proximal body separated from the distal body and having a contact, with a proximal end of the coiled filar passing through the proximal body and being coupled to the contact.

3. The medical lead of claim 1, wherein the distal body is molded onto the distal portion of the linear distal end of the coiled filar.

4. The medical lead of claim 1, further comprising a second openly coiled filar paired with the openly coiled filar, the second openly coiled filar having a linear distal end and wherein the distal body has a second electrode that is coupled to the linear distal end of the second openly coiled filar.

5. The medical lead of claim 1, wherein the openly coiled filar has a distal linear portion, wherein the distal body has at least one tine on a proximal end, an junction of the at least one tine to the distal body providing a hinge point, the at least one tine being rotatable about the hinge point between a collapsed state and an extended state, the at least one tine rotating in the proximal direction from the extended state to the collapsed state to become adjacent to the linear distal end of the coiled filar.

6. The medical lead of claim 5, wherein the distal portion has a first and a second tine.

7. The medical lead of claim 1, wherein the distal body has at least one tine on a proximal end with the at least one tine having an arced shape in a lateral dimension, a junction of the at least one tine to the distal body providing a hinge point, the at least one tine being rotatable about the hinge point between a collapsed state and an extended state, the at least one tine rotating in the proximal direction from the extended state to the collapsed state to become adjacent to the coiled filar.

8. A medical lead, comprising:

an openly coiled filar that has a linear distal end;

a distal body having an electrode and also having at least one tine on a proximal end, with a distal portion of the linear distal end of the coiled filar passing through the distal body and being coupled to the electrode, a junction of the at least one tine to the distal body providing a hinge point, the at least one tine being rotatable about the hinge point between a collapsed state and an extended state, the at least one tine rotating in the proximal direction from the extended state to the collapsed state to become adjacent to the linear distal end of the coiled filar.

9. The medical lead of claim 8, further comprising a proximal body separated from the distal body and having a contact, with a proximal end of the coiled filar passing through the proximal body and being coupled to the contact.

10. The medical lead of claim 8, wherein the distal body is molded onto the distal portion of the linear distal end of the coiled filar.

11. The medical lead of claim 8, further comprising a second openly coiled filar paired with the openly coiled filar, the second openly coiled filar having a linear distal end and wherein the distal body has a second electrode that is coupled to the linear distal end of the second openly coiled filar.

12. The medical lead of claim 8, wherein the distal portion has a first and a second tine.

13. The medical lead of claim 12, wherein the first tine and the second tine are positioned on opposite sides of the distal body.

14. A medical system, comprising:

a stimulation device; and

a medical lead with a proximal end coupled to the stimulation device, the medical lead comprising;

an openly coiled filar that has a proximal end coupled to the stimulation device and has a linear distal end; and

a distal body having an electrode and also having at least one tine on a proximal end, with a distal portion of the linear distal end of the coiled filar passing through the distal body and being coupled to the electrode, a junction of the at least one tine to the distal body providing a hinge point, the at least one tine being rotatable about the hinge point between a collapsed state and an extended state, the at least one tine rotating in the proximal direction from the extended state to the collapsed state to become adjacent to the linear distal end of the coiled filar.

15. The medical system of claim 14, wherein the medical lead further comprises a proximal body separated from the distal body and having a contact, with a proximal end of the coiled filar passing through the proximal body and being coupled to the contact.

16. The medical system of claim 14, wherein the distal body is molded onto the distal portion of the linear distal end of the coiled filar.

17. The medical system of claim 14, wherein the medical lead further comprises a second openly coiled filar paired with the openly coiled filar, the second openly coiled filar having a linear distal end and wherein the distal body has a second electrode that is coupled to the linear distal end of the second openly coiled filar.

18. The medical system of claim 14, wherein the distal portion has a first and a second tine.

19. The medical system of claim 18, wherein the first tine and the second tine are positioned on opposite sides of the distal body.

20. A method of positioning a medical lead, comprising:

providing the medical lead having an openly coiled filar that has a linear distal end, the medical lead also having a distal body having an electrode and also having at least one tine on a proximal end, with a distal portion of the linear distal end of the coiled filar passing through the distal body and being coupled to the electrode, a junction point of the at least one tine to the distal body providing a hinge point, the at least one tine being rotatable about the hinge point between a collapsed state and an extended state, the at least one tine rotating in the proximal direction from the extended state to the collapsed state to become adjacent to the linear distal end of the coiled filar;

implanting the medical lead by routing the medical lead through a needle with the at least one tine in the collapsed state with the at least one tine achieving the extended state upon exiting the needle; and

explanting the medical lead by removing the lead in the proximal direction, wherein during explanting the at least one tine rotates distally from the extended state to a second collapsed state where the at least one tine is adjacent to the distal body.