Patent ID: 8568308
Filing Date: 2013-10-29
Classification: A61B

Abstract:
1. A device for use in or around an operative portal, comprising; a tubular outer cannula having a distal end, a proximal end and an inner surface and an outer surface, the proximal end of the tubular outer cannula being provided with an outwardly extending flange, and said outer cannula having a substantially consistent inner diameter as it extends from said proximal end to said distal end; a tubular inner cannula having a distal end, a proximal end and an outer surface, said inner cannula greater in length than said outer cannula, said inner cannula positioned within said outer cannula for longitudinal movement within said outer cannula and said inner cannula being provided with an outwardly extending flange adjacent the proximal end thereof preventing passage of the proximal end of the outer cannula over the proximal end of the inner cannula when said outer cannula and said inner cannula are deployed within a operative portal and maintaining said outer cannula and said inner cannula as a single unit once deployed; and a plurality of tips or wings circumferentially attached to said distal end of said inner cannula, said plurality of tips or wings being independent and distict from the outer cannula, said plurality of tips or wings retained between said inner surface of said outer cannula and said outer surface of said inner cannula when said outer cannula is in a first position, and each of said plurality of tips or wings being angled away from the other plurality of tips or wings enabling said plurality of tips or wings to stabilize the device in or around the operative portal when said outer cannula is moved to a second position with said proximal ends of both said inner and outer cannulae being adjacent to one another and said plurality of tips or wings being free to angle away from the other plurality of tips or wings; wherein said outwardly extending flange of the inner cannula works in combination with said plurality of tips or wings to maintain said inner cannula and said outer cannula as a single unit once deployed through skin, said plurality of tips or wings stabilizing said device by holding said inner cannula relative to said operative portal and said outwardly extending flange of said inner cannula preventing passage of said proximal end of said outer cannula over said proximal end of said inner cannula.