US Patent 11744590 Vessel shaping devices and methods

An external vascular support for shaping a vein-artery junction between an artery and a vein anastomosed to the artery, the support comprising: an arterial portion that is shaped to be in apposition with an exterior wall of the artery when the artery is accommodated within a lumen of the arterial portion, and a venous portion that is shaped to be in apposition with an exterior wall of the vein when the vein is accommodated within a lumen of the venous portion, wherein the arterial and venous portions are physically connected at an acute angle, and the corner of the acute angle is shaped as a rounding having a radius of curvature in the range of 0.25 mm to 4 mm.