Patent ID: 7953497

Claim:
A stylet for use with a medical stimulating lead, the stylet comprising: an elongated body having a proximal end, a distal end, a length, and an outer diameter along the length, wherein the outer diameter of the body is isodiametric; a handle disposed at the proximal end of the body, wherein the handle has an outer diameter that is larger than the outer diameter of the body; and a rounded tip glued or welded directly to the distal end of the body; wherein the body comprises an outer covering that is a tube, the outer covering made of a metal outer covering material and having an inner diameter and a solid annular lateral cross-section; wherein the body also comprises a solid inner core made of inner core material, the inner core being disposed inside the outer covering and having an outer diameter and a solid lateral cross-section; wherein the outer covering material and inner core material have different elastic and buckling properties; wherein the inner diameter of the outer covering and the outer diameter of the inner core vary along the length of the body such that the inner diameter of the outer covering decreases distally along the length of the body and the outer diameter of the inner core increases distally along the length of the body, while the outer diameter of the lead remains isodiametric.