Medical guidewire
First Claim
1. A medical guidewire having an elongated body that has a first flexibility and a distal tip region of a second, relatively greater flexibility, said guidewire comprisinga core having a body portion of a first diameter, a distal portion terminating in a relatively smaller diameter, and a distal end portion, said distal end portion disposed in a distal tip region and spaced proximally from a round tip element that defines a distal end of said guidewire, said distal portion being formed of nitinol,a first coil joined to the body portion of said core at its proximal end at coupling means and extending along said core to a termination point in said distal tip region, proximal of the end portion of the core,a relatively more flexible second coil has a proximal end joined to said first coil and has a distal end joined to the round tip element,a safety wire secured to said core, said safety wire having a generally flat distal end portion within said second coil, joined to said round tip element,a transition wire secured to said core, said transition wire having a generally flat distal end portion disposed to terminate within said second coil intermediate of the distal end portions of said core and of said safety wire, said safety wire and said transition wire being secured to said coupling means.
3 Assignments
0 Petitions
Accused Products
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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Citations
13 Claims
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1. A medical guidewire having an elongated body that has a first flexibility and a distal tip region of a second, relatively greater flexibility, said guidewire comprising
a core having a body portion of a first diameter, a distal portion terminating in a relatively smaller diameter, and a distal end portion, said distal end portion disposed in a distal tip region and spaced proximally from a round tip element that defines a distal end of said guidewire, said distal portion being formed of nitinol, a first coil joined to the body portion of said core at its proximal end at coupling means and extending along said core to a termination point in said distal tip region, proximal of the end portion of the core, a relatively more flexible second coil has a proximal end joined to said first coil and has a distal end joined to the round tip element, a safety wire secured to said core, said safety wire having a generally flat distal end portion within said second coil, joined to said round tip element, a transition wire secured to said core, said transition wire having a generally flat distal end portion disposed to terminate within said second coil intermediate of the distal end portions of said core and of said safety wire, said safety wire and said transition wire being secured to said coupling means.
Specification