Patent ID: 6719804
Filing Date: 2004-04-13
Classification: A61F,A61M

Abstract:
A medical stent comprising:a single-piece, extruded stent body which does not substantially soften when exposed to a temperature of a human body, at least a portion of the stent body sized for placement in a ureter and at least a section of the stent body defining holes therethrough, the stent body comprising: a first section defining a lumen and comprising a first coil completing at least one revolution, the first section comprising a first material having a first durometer value; a second section defining a lumen and comprising a second coil completing at least one revolution, the second section comprising a second material having a second durometer value, wherein the second durometer value is greater than the first durometer value; and a third section defining a lumen and located between the first and second sections, wherein the third section comprises a co-extrusion of the first and second materials that is disposed between the first coil and the second coil and wherein an outer surface of the third section smoothly transitions to outer surfaces of the first and second sections immediately proximate the third section and an inner diameter of the third section is substantially constant through the third section and on either side of the third section immediately proximate to the third section in the first and second sections.