this is a composite guidewire for use with a catheter for accessing a targeted site in a lumen system of a patient &# 39 ; s body . the guidewire core or guidewire section may be of a stainless steel or a high elasticity metal alloy , preferably a ni — ti alloy , also preferably having specified physical parameters . the composite guidewire assembly is especially useful for accessing peripheral or soft tissue targets . the invention includes multi - section guidewire assemblies having super - elastic alloy or stainless steel ribbon braided reinforcements along a least a portion of the core . a variation of the inventive guidewire includes a braid and a tie layer to enhance the guidewire &# 39 ; s suitability for use within catheters and within the interior of vascular lumen .