diagnosed as having a prolapsed disc causing a nerve root impingement of the type shown in fig3 and 4 the patient is positioned on a radiolucent table not shown in a prone position first a surgeon inserts a special needle 140 with a bore not shown into the patient 39 s body over the symptomatic site as shown in fig6 the needle 140 is rigid enough to stay straight and helps the surgeon to get to a desired position inside the patient 39 s body 142 under the fluoroscopic guidance under the fluoroscopic observation a guidewire 144 made of suitable stainless steel of about 1 0 to 1 25 mm in diameter is inserted through the bore of the needle 140 into the patient 39 s body 142 through a predefined entry point 146 this is shown in fig7 which illustrates a guidewire inserted into the central bore of the needle shown in fig6 the guidewire 144 is advanced until it reaches the target position specified by the surgeon after the guidewire 144 is in the right position the needle 140 is removed from the patient 39 s body and a surgeon does an incision around the entry point 146 in order to be able to insert other.