Percutaneous lead introducing system and method

Abstract

A method and apparatus for introducing a neural stimulator lead into the epidural space in the spinal cord of a patient includes an introducer into which an epidural needle assembly may be inserted through a cannula in the introducer. The introducer along with the epidural needle assembly, such as a Tuohy needle, are inserted between the vertebrae in the patient's spine so that the leading tip of the epidural needle assembly and the introducer are adjacent the epidural space. The epidural needle assembly includes a needle which also has a cannula and an obturator which is inserted in the cannula when the introducer and epidural needle assembly are being inserted between the vertebrae. The obturator is thereafter removed from the cannula of the needle, the needle cannula is filled with a saline solution, and the introducer is further advanced into the epidural space as the needle is withdrawn from the cannula of the introducer. The neural stimulator lead is then inserted through the cannula of the introducer, until it is positioned in the epidural space. Once the electrode of the lead is positioned at its desired location, the introducer is withdrawn along the lead and the introducer is split away from the electrode by a pair of handles and a weakened score line extending longitudinally of the cannula of the introducer.