Lead having composite insulative coating

Abstract

A lead assembly includes a flexible lead body which extends from a proximal end to a distal end, the lead body includes one or more conductors. The lead assembly further includes an electrode assembly, and at least one coating of insulative material coated directly on at least one conductor.

1 . A method for making a lead assembly comprising:
 coupling at least one electrode with one of a first conductor and a second conductor;   positioning the first conductor within the second conductor;   spraying a first composite insulative coating on a first conductor outer surface, the first composite insulative coating between the first conductor and the second conductor; and   spraying a second composite insulative coating on a second conductor outer surface.   
   
   
       2 . The method for making the lead assembly of  claim 1 , further comprising:
 masking at least one of the first conductor and the second conductor prior to spraying the first or second composite insulative coatings;   removing the masking to expose an uninsulated conductor portion of at least one of the first conductor and the second conductor after spraying the first or second composite insulative coating; and   coupling an electrode with the uninsulated conductor portion.   
   
   
       3 . The method for making the lead assembly of  claim 1 , wherein positioning the first conductor within the second conductor includes movably positioning the first conductor within the second conductor, and the first conductor is movable relative to the second conductor. 
   
   
       4 . The method for making the lead assembly of  claim 3 , wherein movably positioning the first conductor within the second conductor includes rotatably positioning the first conductor within the second conductor, and rotation of the first conductor relative to the second conductor moves the first conductor along a longitudinal axis of the second conductor. 
   
   
       5 . The method for making the lead assembly of  claim 1 , wherein at least one of spraying the first composite insulative coating and spraying the second composite insulative coating includes applying a plurality of composite insulative coating layers, and a first composite insulative coating layer includes a first insulative material and a second composite insulative coating layer includes a second insulative material different from the first insulative material. 
   
   
       6 . The method for making the lead assembly of  claim 1 , wherein at least one of spraying the first composite insulative coating and spraying the second composite insulative coating includes applying a composite insulative coating having a plurality of different insulative materials. 
   
   
       7 . The method for making the lead assembly of  claim 1 , wherein positioning the first conductor within the second conductor includes positioning a first braided conductor within a second braided conductor. 
   
   
       8 . A method for making a lead assembly comprising:
 coupling at least one electrode with one of a first annular conductor and a second annular conductor, the first annular conductor having a first outer surface and a first inner surface, and the second annular conductor having a second outer surface and a second inner surface;   disposing the first annular conductor within the second annular conductor;   dipping the first outer surface in a first composite insulative coating material;   forming a first composite insulative layer on the first outer surface with the first composite insulative coating material;   dipping the second outer surface in a second composite insulative coating material; and   forming a second composite insulative layer on the second outer surface with the second composite insulative coating material.   
   
   
       9 . The method for making the lead assembly of  claim 8 , wherein disposing the first annular conductor within the second annular conductor includes disposing a first coiled conductor within a second braided conductor. 
   
   
       10 . The method for making the lead assembly of  claim 8 , wherein at least one of forming the first composite insulative layer on the first outer surface and forming the second composite insulative layer on the second outer surface includes solidifying at least one of the first composite insulative coating material and the second composite insulative coating material. 
   
   
       11 . The method for making the lead assembly of  claim 8 , further comprising:
 masking at least one of the first outer surface and the second outer surface prior to dipping the at least one of the first outer surface and the second outer surface;   removing the masking to expose an uninsulated conductor portion of at least one of the first outer surface and the second outer surface after dipping the at least one of the first outer surface and the second outer surface; and   coupling an electrode with the uninsulated conductor portion.   
   
   
       12 . The method for making the lead assembly of  claim 8 , wherein disposing the first annular conductor within the second annular conductor includes movably coupling the first annular conductor with the second annular conductor. 
   
   
       13 . The method for making the lead assembly of  claim 12 , wherein movably coupling the first annular conductor with the second annular conductor includes rotatably coupling the first annular conductor with the second annular conductor, and rotation of the first annular conductor relative to the second annular conductor moves the first annular conductor along a longitudinal axis of the second annular conductor. 
   
   
       14 . The method for making the lead assembly of  claim 8 , wherein at least one of dipping the first outer surface in the first composite insulative coating material and dipping the second outer surface in the second composite insulative coating material includes applying a plurality of insulative coatings, and a first insulative coating includes a first insulative material and a second insulative coating includes a second insulative material different from the first insulative material. 
   
   
       15 . The method for making the lead assembly of  claim 8 , wherein at least one of dipping the first outer surface in the first composite insulative coating material and dipping the second outer surface in the second composite insulative coating material includes applying a composite coating material having a plurality of different insulative materials. 
   
   
       16 . A lead assembly comprising:
 a lead body;   a first conductor extending through the lead body, the first conductor including a first conductor outer surface;   a second conductor annularly extending through the lead body, the second conductor positioned around the first conductor, the second conductor including a second conductor outer surface;   at least one electrode coupled with one of the first conductor and the second conductor; and   means for insulating the first conductor outer surface and the second conductor outer surface.   
   
   
       17 . The lead assembly of  claim 16 , wherein the means for insulating the first conductor outer surface and the second conductor outer surface includes a composite insulative coating sprayed on the first conductor outer surface and the second conductive outer surface. 
   
   
       18 . The lead assembly of  claim 17 , wherein the composite insulative coating includes a first composite insulative layer having a first insulative material and a second composite insulative layer having a second insulative material different from the first insulative material, the second composite insulative layer on the first composite insulative layer. 
   
   
       19 . The lead assembly of  claim 17 , wherein the composite insulative coating includes a first insulative material mixed with a second insulative material. 
   
   
       20 . The lead assembly of  claim 16 , wherein the first conductor includes a braided conductor extending annularly through the lead body. 
   
   
       21 . The lead assembly of  claim 20 , wherein the braided conductor is rotatable relative to the second conductor, the braided conductor is coupled with an active fixation device, and rotation of the braided conductor correspondingly moves the active fixation device relative to the lead body along a lead body longitudinal axis. 
   
   
       22 . The lead assembly of  claim 16 , wherein at least one of a first conductor inner surface and a second conductor inner surface are uninsulated.