Medical guidewire

摘要

Provided is a guidewire including a core shaft, an outer flexible tube, a stranded wire that extends parallel to the core shaft, and a hollow stranded-wire coil disposed in the outer flexible tube. The hollow stranded-wire coil is formed of multiple strands and surrounds the distal end portion of the core shaft and the stranded wire. Distal ends of the hollow stranded-wire coil, the core shaft, and the stranded wire are joined to a distal end of the outer flexible tube.

主权项

1. A medical guidewire comprising:
a core shaft including a distal end portion having a small diameter; an outer flexible tube that surrounds an outer surface of the core shaft; a stranded wire disposed parallel to the distal end portion of the core shaft, the stranded wire comprising a plurality of strands, and a distal end of the stranded wire being coextensive with the distal end portion of the core shaft; a hollow stranded-wire coil disposed entirely within the outer flexible tube, the hollow stranded-wire coil being formed of multiple strands and surrounding the distal end portion of the core shaft and the stranded wire; and a brazed end portion, which defines a distal end of the guidewire,
wherein: i) a distal end of the hollow stranded-wire coil, ii) a distal end of the core shaft, iii) the distal end of the stranded wire, and iv) a distal end of the outer flexible tube are directly coupled to the brazed end portion.