Stent

Inventors

Mangiardi, Eric K.

Assignees

Q3 Medical Devices Ltd

Abstract

A bioabsorable stent is disclosed. The stent is made of a polymer and/or non-polymer material and has an elongated body having a proximate end, a distal end, and at least one open channel formed on the exterior surface of the elongated body to provide fluid communication between the proximal end and the distal end. Also disclosed is a bioabsorable stent having an elongated center rod having a proximate end and a distal end and a plurality of leaflets extending outward from the center rod and forming channels between two neighboring leaflets to provide fluid communication between the proximal end and the distal end.

Core Innovation

The invention provides a bioabsorbable stent with an elongated body that includes a proximal end, a distal end, a central axis, and a center lumen. At least one open sinusoidally undulating channel is helically and longitudinally wound around the central axis, extends from the proximal end to the distal end, and is formed on exterior surfaces of the elongated body to allow fluid communication between the proximal and distal ends to occur in contact with the exterior surface of the elongated body.

The undulating channel is not in fluid communication with the center lumen. The elongated body comprises a bioabsorbable material, and the disclosure further includes a non-polymer metal elongated body selected from stainless steel, cobalt alloys, titanium alloys, tantalum, niobium, tungsten, and molybdenum, including magnesium–chitin alloy configurations.

The disclosed embodiments also include stent swelling behavior defined by a pre-implantation diameter Dpre and a post-implantation diameter Dpost resulting from absorbing moisture. The disclosure further describes expandable channel structures, including compressible channel walls that reduce diameter in a compressed state, and foldable or pivotally rotatable leaflet-type structures using cam/center rod/hub concepts.

Claims Coverage

The partial content includes two independent claims. One covers a bioabsorbable elongated body with sinusoidal undulating exterior channels, and one covers an elongated body made from specified non-polymer metals; both define the same core stent structure for exterior fluid communication while excluding fluid communication with the center lumen.

Across the independent claims, the inventive structure centers on an exterior sinusoidally undulating helical channel providing proximal-to-distal fluid communication while remaining not in fluid communication with the center lumen. The independent claim set differentiates embodiments by requiring a bioabsorbable material in one claim and restricting the elongated body material to a specified group of non-polymer metals in the other.

Stated Advantages

Documented Applications