Guidewire with outer sheath
First Claim
Patent Images
1. A vascular guidewire constructed for introduction into a patient'"'"'s vascular system and traversing vessels in the vascular system comprising:
- a) an elongated core having a body section with a first diametrical extent and a distal section extending from said body section, said distal section comprising a first distal portion whose diametrical extent is diminished proceeding away from said body section, a second distal portion forming an enlarged distal section terminus, and a third distal portion between the first distal portion and the second distal portion, said third distal portion relatively easily deformable compared to said first and second distal portions;
b) a radiopaque coil disposed about said first, second and third distal portions, said coil having a first end anchored to said first distal portion and a second end anchored to said second distal portion; and
,c) a thin walled sheath comprised of polytetrafluroethylene material heat shrunk about said first, second and third distal portions, a first end of said heat shrunk sheath resiliently hugging said enlarged terminal portion to form a smoothly contoured lubricious distal section end surface that moves in low friction contact with tissue in a vessel being traversed, and a second end of the sheath is anchored to said first distal core section.
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Accused Products
Abstract
A guidewire having an elongated core including a distal section having a relatively supple portion, a bendable portion, and an enlarged terminal portion, a radiopaque helical member disposed about the bendable portion and structurally interconnecting the terminal portion and the supple portion, and a thin walled flexible sheath tightly surrounding at least a portion of the enlarged terminal section and overlying the bendable portion, the sheath comprised of lubricious material that enhances endwise guidewire movement.
202 Citations
4 Claims
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1. A vascular guidewire constructed for introduction into a patient'"'"'s vascular system and traversing vessels in the vascular system comprising:
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a) an elongated core having a body section with a first diametrical extent and a distal section extending from said body section, said distal section comprising a first distal portion whose diametrical extent is diminished proceeding away from said body section, a second distal portion forming an enlarged distal section terminus, and a third distal portion between the first distal portion and the second distal portion, said third distal portion relatively easily deformable compared to said first and second distal portions; b) a radiopaque coil disposed about said first, second and third distal portions, said coil having a first end anchored to said first distal portion and a second end anchored to said second distal portion; and
,c) a thin walled sheath comprised of polytetrafluroethylene material heat shrunk about said first, second and third distal portions, a first end of said heat shrunk sheath resiliently hugging said enlarged terminal portion to form a smoothly contoured lubricious distal section end surface that moves in low friction contact with tissue in a vessel being traversed, and a second end of the sheath is anchored to said first distal core section. - View Dependent Claims (2, 3, 4)
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Specification