Importance

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Abstract

A medical guidewire has an elongated body that has a degree of flexibility and a distal tip region of relatively greater flexibility. The guidewire consists of a core having a body of first diameter, a distal portion of a relatively smaller diameter, and a generally flat distal end. The end is disposed in the tip region and is spaced proximally from a round tip element that defines the distal end of the guidewire. The distal portion of the core is formed of nitinol. A first coil is joined at its proximal end to the core body by a coupling or crimp ring and extends along the core to a termination point in the distal tip region, proximal of the end portion of the core. A relatively more flexible second coil has a proximal end joined to the first coil and has a distal end joined to the round tip element. A safety wire is secured to the core and has a generally flat distal end within the second coil, joined to the round tip. A transition wire is secured to the core and has a generally flat distal end that terminates within the second coil intermediate of the distal ends of the core and safety wire. The safety wire and transition wires are secured to the coupling.

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First Claim