Shaping ribbon for guiding members
First Claim
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1. An intravascular guiding member comprising:
- a) an elongated core element having proximal and distal ends;
b) a flexible body disposed about the distal end of the core element having a distal end spaced from the distal end of the core element; and
c) a shaping ribbon formed of an alloy consisting essentially of tungsten and from about 3 to about 30% rhenium which has a tensile strength in the longitudinal direction of about 200 to about 600 ksi and an elongation of about 0.8 to about 5% and which is secured by the distal end thereof to the distal end of the flexible body and by the proximal end thereof to the core element.
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Abstract
A shaping ribbon for intravascular guiding members such as guidewires which is formed from an alloy containing about 3 to about 30% rhenium and the balance essentially of tungsten and has a tensile strength of about 200 to about 600 ksi. The ribbon has a rectangular transverse cross section and the distal end of the ribbon is readily secured by laser or plasma arc welding to the distal end of a helical coil. Its proximal end is secured to the core element at an intermediate location by soldering or brazing. The ribbon has excellent strength and torque resistance.
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Citations
13 Claims
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1. An intravascular guiding member comprising:
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a) an elongated core element having proximal and distal ends; b) a flexible body disposed about the distal end of the core element having a distal end spaced from the distal end of the core element; and c) a shaping ribbon formed of an alloy consisting essentially of tungsten and from about 3 to about 30% rhenium which has a tensile strength in the longitudinal direction of about 200 to about 600 ksi and an elongation of about 0.8 to about 5% and which is secured by the distal end thereof to the distal end of the flexible body and by the proximal end thereof to the core element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification