Patent ID: 6258113
Filing Date: 2001-07-10
Classification: A61B,A61F

Abstract:
An instrument for creating an operating space in a body comprising:an elongate cannula body having a blunt nose, an elongate side wall defining an access aperture, an interior lumen, and a first elongate deployment aperture, said cannula being deliverable along a guidewire between a first and second tissue layer in a body;a retractable outer protective sheath,a fluid delivery lumen in fluid communication with a fluid source, anda hollow expandable tissue separating balloon including a first deployable tissue separating wing having a first major surface and a second major surface, said first major surface being peripherally contiguous with said second major surface across a distal end, said first and second major surfaces defining a fluid-tight balloon cavity therebetween, said balloon cavity being in fluid communication with said fluid delivery lumen and expandable through said first deployment aperture of said cannula body from a first contracted configuration confined within said cannula body to a second expanded configuration extending through said elongate window so as to form said operating space between said first and second tissue layers, wherein one of said first and second major surfaces of said tissue separating balloon comprises a porous prosthetic mesh so that, upon tissue separating balloon expansion, said mesh will be deployed over said operating area.