implantable mri compatible medical lead with a rotatable control member

Abstract

A medical implantable lead is adapted to be implanted into a human or animal body for monitoring and/or controlling of an organ inside the body. The lead has in a distal end, a combined fixation means and electrode member in form of a helix, which is connected to a rotatable tubular member being connected to a rotatable member at a proximal end of the lead, and which is rotatable in relation to the lead and extendable out from the distal end, by rotation of the control member and the tubular torque transferring member, to be able to fixate the distal end of the lead to the organ by being screwed into the tissue. The helix is electrically connected to a connector at the proximal end by means of at least one electrically conducting wire formed as an electrically conducting coil, which is separate from the tubular torque transferring member and unrotatable in relation to the lead and that has one or more individual wires, each including an electrically conducting wire core and a surrounding electrically insulating layer, wherein the rotatable control member is rotatable within the connector.

1 .- 10 . (canceled) 
     
     
         11 . An MRI-compatible medical implantable lead comprising:
 a lead body adapted to be implanted into a human or animal body for monitoring and/or controlling an organ inside the body;   a connecting structure comprising a connector pin at a proximal end of the lead body, said connector pin comprising a rotatable control member;   a rotatable tubular torque transferring member connected to the rotatable control member;   a combined fixation means and electrode member in form of a helix at a distal end of the lead, said helix being connected to said rotatable tubular torque transferring member and being rotatable in relation to the lead body and extendable out from said distal end, by rotation of the control member and the tubular torque transferring member, for fixation of the lead to the organ;   a connector at said proximal end of the lead body electrically connected to the helix by at least one electrically conducting wire formed as an electrically conducting coil, said coil being separate from the tubular torque transferring member and rotatably fixed in relation to the lead, whereby the tubular torque transferring member is rotatably arranged within the electrically conducting coil and having no electrically conducting function to or from the helix;   said electrically conducting coil comprising one or more individual wires, each comprising an electrically conducting wire core and a surrounding electrically insulating layer; and   said connector pin comprising said control member and said connector, said control member being rotatably arranged within said connector.   
     
     
         12 . A medical implantable lead according to  claim 11 , wherein the control member is electrically insulated from the connector. 
     
     
         13 . A medical implantable lead according to  claim 11 , wherein the control member and the connector are electrically insulated from each other by an electrically insulating member. 
     
     
         14 . A medical implantable lead according to  claim 13 , wherein the electrically insulating member is an electrically insulating sleeve and the connector is arranged at the outer circumference of the insulating sleeve. 
     
     
         15 . A medical implantable lead according to  claim 13 , wherein the electrically insulating member is in one unitary piece. 
     
     
         16 . A medical implantable lead according to  claim 13 , wherein the electrically insulating member is non-rotatably mounted to said connector, and said control member is rotatable inside said insulating member. 
     
     
         17 . A medical implantable lead according to  claim 13 , wherein the electrically insulating member is non-rotatably mounted to said control member, and said control member and said electrically insulating member are jointly rotatable within said connector. 
     
     
         18 . A medical implantable lead according to  claim 11 , wherein that the connector is a metallic sleeve completely surrounding the control member. 
     
     
         19 . A medical implantable lead according to  claim 18 , wherein the control member has a rotary engagement portion configured to engage a rotary tool. 
     
     
         20 . A medical implantable lead according to  claim 19 , wherein the rotary engagement portion is a recess having engagement formations at the proximal end of the control member. 
     
     
         21 . A medical implantable lead according to  claim 11 , wherein the control member projects with a proximal portion beyond the connector at the proximal end of the lead body. 
     
     
         22 . A medical implantable lead according to  claim 21 , wherein the proximal portion of the control member is adapted to be gripped by a gripping tool for rotation of the control member. 
     
     
         23 . A medical implantable lead according to  claim 11 , wherein said connecting structure comprises a thickened portion and said connector is non-rotatably mounted to said thickened portion.