High-damping composite material
Nickel-titanium-base shape-memory alloy composite structure
Floppy guide wire with opaque tip
Catheter guide wire
Guide wire for catheter
Flexible hollow guiding member with means for fluid communication therethrough
Flexible guide wire with improved mounting arrangement for coil spring tip
ApplicationNo. 728233 filed on 07/10/1991
US Classes:600/585, Flexible catheter guide604/530With shape retaining memory
ExaminersPrimary: Yasko, John D.
Assistant: Cermak, Adam J.
Attorney, Agent or Firm
International ClassesA61B 005/00
AbstractA wire guide construction for medical procedures that involve accessing specific inner body areas without major surgery. The wire guide comprises a mandrel which is a coaxial composite of a thin stainless steel wire radially surrounded by a shape memory alloy, such as a nickel titanium alloy. The mandrel is of a constant diameter over the majority of its length except it is tapered at its distal end to reveal the inner stainless steel wire. A flexible coil of platinum is attached near the distal end of the mandrel and is secured in place when a smoothly rounded tip is welded to the distal tip of the mandrel. The complete wire guide can be coated with a polymer layer, and 70 to 80% of the distal portion of the wire guide can be coated with a hydrophilic polymer to increase lubricity.