IP Library › Granted Patent US 12702804
Granted Patent B2
US 12702804 · App. 18/541,141 · Granted Aug 11, 2026

Ureteral stent

Inventors: Thomas J. Holman (Princeton, MN); Hui Tang (Action, MA); Judy L. Walish (Boston, MA)
Assignee: Gyrus ACMI, Inc.
A61M27/008A61M25/04A61M27/006A61M2025/0233A61M39/24
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Quick Facts
Patent No.
US 12702804
App. No.
18/541,141
Granted
Aug 11, 2026
Kind
B2
Abstract

Disclosed herein is ureteral stent. The ureteral stent includes a proximal end, a distal end, and a middle portion. The proximal end includes a retention feature having a coiled shape. The distal end is opposite the proximal end. The middle portion is between the proximal end and the distal end.

Claims (32)

1 . A ureteral stent comprising:

a first end of the ureteral stent comprising a retention feature having a coiled tube;

a second end of the ureteral stent opposite the first end; and

a middle portion between the first end and the second end,

wherein the retention feature comprises the coiled tube surrounding the first end in a spiraled fashion, and

wherein the first end is configured to be located in a kidney of a patient, where a proximal end of the coiled tube has a fluid entrance aperture into the coiled tube, and wherein the coiled tube is closed between the fluid entrance aperture and the middle portion.

2 . The ureteral stent as claimed in claim 1 , wherein the first end comprises at least one additional fluid entrance aperture into the coiled tube.

3 . The ureteral stent as claimed in claim 1 , wherein the fluid entrance aperture into the coiled tube is proximate the middle portion.

4 . The ureteral stent as claimed in claim 1 , wherein the second end comprises a tail portion configured to float.

5 . The ureteral stent as claimed in claim 4 , wherein the tail portion comprises a foam material.

6 . The ureteral stent as claimed in claim 4 , wherein the tail portion comprises a trapped gas in a side wall of the tail portion.

7 . A ureteral stent comprising:

a first end of the ureteral stent comprising a retention feature having a coiled tube comprising a retention feature having a coiled portion;

a second end of the ureteral stent opposite the first end; and

a middle portion between the first end and the second end,

wherein the retention feature comprises the coiled tube surrounding the first end in a spiraled fashion and extending in a radial direction, and

wherein the first end is configured to be located in a kidney of a patient, where a proximal end of the coiled tube has a fluid entrance aperture into the coiled tube, and wherein the coiled tube is closed between the fluid entrance aperture and the middle portion.

8 . The ureteral stent as claimed in claim 7 , wherein the first end comprises at least one additional fluid entrance aperture into the coiled tube.

9 . The ureteral stent as claimed in claim 7 , wherein the fluid entrance aperture into the coiled tube is proximate the middle portion.

10 . The ureteral stent as claimed in claim 7 , wherein the second end comprises a tail portion configured to float.

11 . The ureteral stent as claimed in claim 10 , wherein the tail portion comprises a foam material.

12 . The ureteral stent as claimed in claim 10 , wherein the tail portion comprises a trapped gas in a side wall of the tail portion.

13 . A ureteral stent comprising:

a first end of the ureteral stent comprising a retention feature having a coiled tube;

a second end of the ureteral stent opposite the first end; and

a middle portion between the first end and the second end,

wherein the retention feature comprises the coiled tube surrounding the first end in a spiral fashion and lying substantially in a plane orthogonal to the middle portion, and

wherein the first end is configured to be located in a kidney of a patient, where a proximal end of the coiled tube has a fluid entrance aperture into the coiled tube, and wherein the coiled tube is closed between the fluid entrance aperture and the middle portion.

14 . The ureteral stent as claimed in claim 13 , wherein the first end comprised at least one additional fluid entrance aperture into the coiled tube.

15 . The ureteral stent as claimed in claim 13 , wherein the fluid entrance aperture into the coiled tube is proximate the middle portion.

16 . The ureteral stent as claimed in claim 13 , wherein the second end comprises a tail portion configured to float.

17 . The ureteral stent as claimed in claim 16 , wherein the tail portion comprises a foam material.