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Multi-sheath delivery catheter



Multi-sheath delivery catheter



Official Gazette of the United States Patent & Trademark Office Patents 1272(2), July 8



A multi-sheath delivery catheter for introducing a prosthesis into a body lumen involving use of (a) an outer sheath containing a portion of the prosthesis and having an inner surface with a non-round cross-section; (b) a middle sheath slideably disposed within the outer sheath and containing another portion of the prosthesis, the middle sheath having a first handle with a non-round cross-section engaging the non-round cross-section of the outer sheath; and (c) a pusher within the middle sheath for engaging the prosthesis, whereby relative rotational movement between the outer sheath and the middle sheath is prevented by virtue of the engagement of the first handle with the non-round cross-section of the outer sheath. In another aspect, the invention provides a delivery catheter having a mechanism for sequentially retracting concentric tubes to deploy the prosthesis. In another aspect, the invention provides a mechanism for preventing relative axial movement of concentric tubes.

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Accession: 035349505

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