Stent delivery system having anisotropic sheath
First Claim
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1. A method of delivering a self-expanding stent using a stent delivery system, the method comprising:
- advancing the stent delivery system over a guidewire, the stent delivery system comprising;
an elongate outer member defining an outer member lumen, the elongate outer member comprising;
an anisotropic portion, the anisotropic portion being radially elastic and longitudinally inelastic, anda rigid portion proximal to the anisotropic portion, the rigid portion being radially inelastic and longitudinally inelastic;
a guidewire channel positioned radially inward of the elongate outer member, the guidewire insertable into a lumen of the guidewire channel; and
a pusher assembly in the outer member lumen,wherein the self-expanding stent is positioned radially inward of the anisotropic portion of the elongate outer member in a compressed configuration, the anisotropic portion of the elongate outer member being at least as long as the self-expanding stent in the compressed configuration, the self-expanding stent comprising flared proximal and distal ends in the compressed configuration, parts of the anisotropic portion surrounding the flared ends of the self-expanding stent in the compressed configuration; and
advancing the self-expanding stent out of the elongate outer member, wherein advancing the self-expanding stent out of the elongate outer member comprises expanding the self-expanding stent from the compressed configuration to an expanded configuration,wherein during advancing the self-expanding stent out of the elongate member, a diameter of the anisotropic portion surrounding the flared ends of the self-expanding stent in the compressed configuration is greater than the anisotropic portion not surrounding the flared ends of the self-expanding stent in the compressed configuration.
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Abstract
A stent delivery system and methods are described. The stent delivery system can include an elongate outer member defining an outer member lumen through which a self-expanding stent is deliverable. The elongate outer member can include an anisotropic portion and a rigid portion proximal to the anisotropic portion. The anisotropic portion can be radially elastic and longitudinally inelastic. The rigid portion can be radially inelastic and longitudinally inelastic.
154 Citations
7 Claims
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1. A method of delivering a self-expanding stent using a stent delivery system, the method comprising:
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advancing the stent delivery system over a guidewire, the stent delivery system comprising; an elongate outer member defining an outer member lumen, the elongate outer member comprising; an anisotropic portion, the anisotropic portion being radially elastic and longitudinally inelastic, and a rigid portion proximal to the anisotropic portion, the rigid portion being radially inelastic and longitudinally inelastic; a guidewire channel positioned radially inward of the elongate outer member, the guidewire insertable into a lumen of the guidewire channel; and a pusher assembly in the outer member lumen, wherein the self-expanding stent is positioned radially inward of the anisotropic portion of the elongate outer member in a compressed configuration, the anisotropic portion of the elongate outer member being at least as long as the self-expanding stent in the compressed configuration, the self-expanding stent comprising flared proximal and distal ends in the compressed configuration, parts of the anisotropic portion surrounding the flared ends of the self-expanding stent in the compressed configuration; and advancing the self-expanding stent out of the elongate outer member, wherein advancing the self-expanding stent out of the elongate outer member comprises expanding the self-expanding stent from the compressed configuration to an expanded configuration, wherein during advancing the self-expanding stent out of the elongate member, a diameter of the anisotropic portion surrounding the flared ends of the self-expanding stent in the compressed configuration is greater than the anisotropic portion not surrounding the flared ends of the self-expanding stent in the compressed configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification