Ureteral stent
AssigneeGyrus ACMI, Inc.
InventorsHui Tang, Thomas J. Holman, Judy L Walish
Life of this patent
Estimating the term…
Abstract
Provided is a ureteral stent comprising certain amount of ethylene-vinyl acetate polymer and a certain amount of an additive selected from barium sulfate, bismuth subcarbonate, bismuth oxychloride, a polyolefin elastomer, a thermoplastics elastomer, and a mixture thereof. The provided stent may have multiple layers such as inner layer and outer layer with each layer having different elastic modulus. Also provided is a method of making the aforementioned ureteral stent and a method of using the ureteral stent in treating kidney or bladder related diseases.
Claims16
A ureteral stent comprising ethylene-vinyl acetate in an amount of 9% to 30% by weight, and
- a mixture of barium sulfate, bismuth subcarbonate, bismuth oxychloride,
- a polyolefin elastomer, and a thermoplastics elastomer, in an amount of 45% to 90% by weight,
- wherein the ureteral stent has a transitional elastic modulus along an axial direction ranging from 0.5 cm to 40 cm of a total length of the ureteral stent being up to about 40 cm.
A ureteral stent, comprising:
- a body including an inner layer having a first elastic modulus value and an outer layer having a second elastic modulus value, the second elastic modulus value being greater than the first elastic modulus value,
- wherein the body is formed from ethylene-vinyl acetate and:
- a mixture of barium sulfate, bismuth subcarbonate, bismuth oxychloride,
- a polyolefin elastomer and a thermoplastics elastomer, and
- wherein the ethylene-vinyl acetate is in an amount of 9% to 30% by weight, and the mixture of a polyolefin elastomer and a thermoplastics elastomer are in an amount of 45% to 90% by weight
- wherein the ureteral stent has a transitional elastic modulus along an axial direction ranging from 0.5 cm to 40 cm of a total length of the ureteral stent being up to about 40 cm.
Dependencies are inferred from the claim text.