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US 9,067,026 B2Granted
Vascular graft
AssigneeVascular Flow Technologies Limited
InventorsPeter Arno Stonebridge, John Bruce Cameron Dick, John Graeme Houston, Robert Gordon Hood
Life of this patent
Estimating the term…
Abstract
A vascular access graft (1) comprises an elongate conduit (2) having proximal and distal ends (3, 4). At least a portion of the elongate conduit (2) has a self-sealing property such that the portion remains impermeable after puncturing by a dialysis needle. The vascular access graft (1) also comprises a helical fin (6) projecting inwardly from the inner surface (5) of the elongate conduit (2) and extending parallel to the axis of the elongate conduit (2).
Claims19
A vascular access graft comprising:
- an elongate conduit having distal and proximal ends and a length therebetween, an inner surface, an exterior and longitudinal axis, at least a portion of the elongate conduit having a self-sealing property such that the portion remains impermeable after puncturing by a dialysis needle;
- and
- a helical fin projecting inwardly from the inner surface of the elongate conduit, having a first and a second end and a length therebetween, and extending parallel to the longitudinal axis of the elongate conduit, wherein the helical fin extends from the distal end of the elongate conduit to a termination point which is short of the proximal end of the elongate conduit;
- and
- an external palpable protrusion positioned on the exterior of the elongate conduit, wherein the positioning of the protrusion on the elongate conduit corresponds to the position of the termination point of the helical fin between the distal and proximal ends of the elongate conduit.
2 more elements
A vascular access graft comprising:
- an elongate conduit having distal and proximal ends and a length therebetween, an inner surface, an exterior and longitudinal axis, at least a portion of the elongate conduit having a self-sealing property such that the portion remains impermeable after puncturing by a dialysis needle;
- a helical fin projecting inwardly from the inner surface of the elongate conduit, having a first and a second end and a length therebetween, and extending parallel to the longitudinal axis of the elongate conduit,
- wherein the helical fin consists of between 80% and 120% of one single revolution,
- wherein the helical fin extends from the distal end of the elongate conduit to a termination point which is short of the proximal end of the elongate conduit;
- and
- an external palpable protrusion positioned on the exterior of the elongate conduit, wherein the positioning of the protrusion on the elongate conduit corresponds to the position of the termination point of the helical fin between the distal and proximal ends of the elongate conduit.
3 more elements
Dependencies are inferred from the claim text.