A body implantable lead including a stimulation electrode located at its distal end, a ring electrode located proximal to its distal end, and a pressure sensor. The lead is adapted to be used in conjunction with a stylet, which passes through the body of the lead from its proximal end to its distal end....http://www.google.ca/patents/US4967755?utm_source=gb-gplus-sharePatent US4967755 - Electromedical lead with pressure sensor
