Foramina-filling implantable medical lead

An implantable medical lead comprising:

• a lead body having a distal portion;
• a fixation mechanism mechanically coupled to the distal portion, the fixation mechanism including an end portion and a body portion;
• and
• an electrode array mechanically coupled to the body portion of the fixation mechanism and electrically coupled to the lead body, the electrode array being configured to generate a stimulation field;
• wherein the fixation mechanism is configured to anchor the implantable medical lead to a sacrum or tissue surrounding the sacrum to position the electrode array to deliver the stimulation field in or adjacent to a foramen of the sacrum,
• wherein the body portion is configured to contact a first surface within the foramen of the sacrum, and
• wherein the end portion defines a diameter larger than the body portion and is configured to engage a second surface of the sacrum different than the first surface.

An implantable medical system comprising:

• an implantable medical lead comprising:
• a lead body having a distal portion;
• a stent coupled to the distal portion, the stent including an end portion and a body portion;
• and
• an electrode array disposed on the stent, wherein the electrode array is electrically coupled to the lead body and configured to generate a stimulation field;
• wherein the stent is configured to anchor the implantable medical lead to a sacrum or tissue surrounding the sacrum in order to position the electrode array to deliver the stimulation field in or adjacent to a foramen of the sacrum,
• wherein the body portion is configured to urge against a first surface within the foramen of the sacrum, and
• wherein the end portion defines a diameter larger than the body portion and is configured to engage a second surface of the sacrum different than the first surface.