Peter Aliski - Newton MA,
Vasu Nishtala - Snellville GA,
Benedict Shia - Needham MA,
Anthony Tremaglio - Charlestown MA,
Gyrus ACMI, Inc. - Southborough MA
A ureteral stent comprising an elongated tubular member having a body portion and opposed distal end portion and proximal end portion, the elongated tubular member defining a lumen therein; a retention disk comprising a plurality of generally axial, spaced-apart collapsable struts interconnected with a membrane to form a generalized tube with a retention disk lumen therein, the retention disk lumen in fluid communication with the lumen of the body portion, the struts and the membrane couple to the body portion proximal end at a retention disk distal end and terminate at a retention disk proximal end, each strut having a widthwise folding hinge substantially dividing the length of the strut, the struts adapted to have an expanded state wherein the struts are unfolded and substantially straight, as well as a free-resting state wherein each strut folds in upon itself at the folding hinge to form an inverted umbrella-like disk-shaped configuration; and a valve, wherein the inverted umbrella-like configuration provides a conformal shape to the ureteral orifice.