Method and tools for clearing the epidural space in preparation for medical lead implantation

Abstract

An epidural space is cleared of fat and scar tissue in preparation for implantation of a medical lead by utilizing a clearing tool. The clearing tool has a flexible body that allows the clearing tool to deflect when entering the epidural space through a window in the vertebral bone and ligaments. The clearing tool is guided into the epidural space and to a target site by a guidewire present in the epidural space. Upon removal of the guidewire and clearing tool, the medical lead is inserted through the window and cleared epidural space until reaching the target site. The clearing tool may include a distal tip with a shape and size that aids in the clearing of the epidural space. The distal tip may be integral to the clearing tool or may be removable so as to allow for different sizes of the distal tip to be installed as needed.

What is claimed is: 
     
         1 . A method of cleaning an epidural space prior to paddle lead implantation, comprising:
 passing a guidewire through a window to the epidural space created within the spinal column;   passing a tool through the window and into the epidural space by passing the guidewire through a lumen of the tool;   cleaning the epidural space by moving the tool further into the epidural space causing a body of the tool to deflect within the epidural space in proximity to the window and then retracting the tool; and   removing the guidewire and the tool from the epidural space, the body of the tool continuing to deflect as the tool is being removed.   
     
     
         2 . The method of  claim 1 , wherein the guidewire has a pre-formed tip that is curved to enter the epidural space and turn approximately parallel to a dura covering a spinal cord. 
     
     
         3 . The method of  claim 1 , wherein the tool has an elongated body and a distal tip and where the distal tip has a width greater than a diameter of the elongated body. 
     
     
         4 . The method of  claim 3 , wherein the distal tip is integral with the elongated body. 
     
     
         5 . The method of  claim 3 , wherein the distal tip is removable from the elongated body. 
     
     
         6 . The method of  claim 1 , wherein the tool has a flexible elongated body.