Medical stent
First Claim
Patent Images
1. A medical stent comprising:
- a proximal end portion defining a lumen and including a first retention structure, the proximal end portion constructed from at least a first material having a first durometer value, the first retention structure includes a coil offset from a longitudinal axis of the medical stent, the proximal end portion defining a first opening and a second opening, the first opening and the second opening being in fluid communication with the lumen defined by the proximal end portion;
a suture extending through the first opening and the second opening and being configured to facilitate the removal of the medical stent from a body of a patient;
a distal end portion defining a lumen and including a second retention structure, the distal end portion constructed from at least a second material having a second durometer value, the second durometer value being greater than the first durometer value; and
a central portion disposed between the proximal end portion and the distal end portion, the central portion defining a lumen in fluid communication with the lumen of the proximal end portion and the lumen of the distal end portion, the lumen of the central portion defining a longitudinal axis, the central portion constructed from the first material and the second material, the first material and the second material being co-extruded within the central portion such that the first material and the second material are distinct from each other and arranged substantially asymmetrically within a plane normal to the longitudinal axis.
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Accused Products
Abstract
A medical stent is sized for placement in a ureter. The stent includes a first section which includes a first material, defines a lumen, and includes a first coil completing at least one revolution. A second section of the stent includes a second material, defines a lumen, and includes a second coil completing at least one revolution. A third section defines a lumen and is located between the first and second sections. The third section includes a co-extrusion of the first and second materials. One of the first or second sections is harder than the other section.
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Citations
13 Claims
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1. A medical stent comprising:
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a proximal end portion defining a lumen and including a first retention structure, the proximal end portion constructed from at least a first material having a first durometer value, the first retention structure includes a coil offset from a longitudinal axis of the medical stent, the proximal end portion defining a first opening and a second opening, the first opening and the second opening being in fluid communication with the lumen defined by the proximal end portion; a suture extending through the first opening and the second opening and being configured to facilitate the removal of the medical stent from a body of a patient; a distal end portion defining a lumen and including a second retention structure, the distal end portion constructed from at least a second material having a second durometer value, the second durometer value being greater than the first durometer value; and a central portion disposed between the proximal end portion and the distal end portion, the central portion defining a lumen in fluid communication with the lumen of the proximal end portion and the lumen of the distal end portion, the lumen of the central portion defining a longitudinal axis, the central portion constructed from the first material and the second material, the first material and the second material being co-extruded within the central portion such that the first material and the second material are distinct from each other and arranged substantially asymmetrically within a plane normal to the longitudinal axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification