PROSTHESIS DEPLOYMENT DEVICE WITH TRANSLUCENT DISTAL END
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Abstract
A prosthesis delivery and deployment device includes an elongate and flexible outer catheter. The outer catheter has a tubular wall of layered construction, including a translucent inner liner running the complete catheter length, and three outer layers including a translucent distal layer, an opaque medial layer and an opaque proximal outer layer. The outer layers are adjacent one another and are bonded to the liner. A braid composed of helically wound metal filaments is disposed between the liner and the proximal and medial outer layers, and includes a distal portion between the liner and a proximal portion of the distal outer layer. The liner and distal outer layer provide a translucent distal region of the catheter that is adapted to constrain a radially self-expanding prosthesis in a radially reduced, axially elongated state. Because the stent constraining region is translucent, an endoscope can be used to visually monitor the stent when so constrained. Radiopaque markers can be mounted to the outer catheter and to an inner catheter used to deploy the prosthesis, to afford a combined visual and fluoroscopic monitoring for enhanced accuracy in positioning the prosthesis, both before and during its deployment.
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Citations
44 Claims
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1-36. -36. (canceled)
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37. A medical device delivery system for a self expanding stent comprising:
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an outer sheath comprising an elongated tubular body, the elongated tubular body having distal section, the distal section comprising an outer polymeric layer and a inner polymeric layer; a metallic braiding extending longitudinally throughout at least a portion of the distal section and disposed between the outer polymeric layer and the inner polymeric layer; an inner shaft located coaxially within the outer sheath, the shaft having a distal end and a proximal end; and a self-expanding stent releasably retained within the distal section of the outer sheath; wherein the outer polymeric layer comprises a first polymeric material and the inner polymeric layer comprises a second polymeric material, the first polymeric material being different from the second polymeric material, the first polymeric material having relatively high flexibility as compared to the second polymeric material, the inner polymeric layer having a low-friction surface proximal to the self-expanding stent, and the inner and outer polymeric layers being translucent to transparent such that the distal section is light transmissive whereby the stent may be visually inspected through the distal section. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44)
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Specification