	US 12,070,564 B2
	Ureteral stent
Judy L. Walish, Boston, MA (US); Hui Tang, Action, MA (US); and Thomas J. Holman, Princeton, MN (US)
Assigned to Gyrus ACMI, Inc., Westborough, MA (US)
Filed by GYRUS ACMI, INC., Westborough, MA (US)
Filed on Apr. 4, 2022, as Appl. No. 17/657,895.
Application 17/657,895 is a continuation of application No. 15/941,598, filed on Mar. 30, 2018, granted, now 11,318,289.
Prior Publication US 2022/0226624 A1, Jul. 21, 2022
Int. Cl. A61M 27/00 (2006.01); A61F 2/04 (2013.01); A61L 31/04 (2006.01)

CPC A61M 27/008 (2013.01) [A61F 2/04 (2013.01); A61L 31/042 (2013.01); A61F 2002/048 (2013.01); A61L 2430/22 (2013.01); A61M 2210/1085 (2013.01)]

19 Claims

1. A stent comprising:

at least two first sections, each first section having a first wall;

wherein, the first wall defines a first luminal section;

wherein each of the at least two first sections has a first maximum width; and

a second section longitudinally interposed between the at least two first sections;

wherein the second section has a second wall defining a second luminal section;

wherein the second section has a second maximum width less than the first maximum width;

wherein the second luminal section is configured to transition from an initial open configuration to a closed configuration to minimize backflow of a fluid along the second luminal section, when an external pressure of 40 to 60 cm H₂O is applied to the stent.