	US 12,274,482 B2
	Cryoballoon having greater size adjustability at lower operating pressures
Eugene J. Jung, Jr., San Diego, CA (US)
Assigned to Boston Scientific Scimed, Inc., Maple Grove, MN (US)
Filed by Boston Scientific Scimed Inc, Maple Grove, MN (US)
Filed on Mar. 5, 2020, as Appl. No. 16/810,339.
Application 16/810,339 is a continuation of application No. PCT/US2018/040908, filed on Jul. 5, 2018.
Claims priority of provisional application 62/555,200, filed on Sep. 7, 2017.
Prior Publication US 2020/0197067 A1, Jun. 25, 2020
Int. Cl. A61B 18/02 (2006.01); A61B 18/00 (2006.01); A61B 90/00 (2016.01); A61L 29/04 (2006.01); A61M 25/09 (2006.01)

CPC A61B 18/02 (2013.01) [A61L 29/049 (2013.01); A61M 25/09 (2013.01); A61B 2018/0022 (2013.01); A61B 2018/00375 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/0212 (2013.01); A61B 2090/065 (2016.02)]

12 Claims

1. A balloon catheter for an intravascular catheter system, the balloon catheter comprising a cryogenic balloon assembly including an inner balloon and an outer balloon, the outer balloon formed from a blend of 85% polyurethane and 15% polyamide block copolymer, the cryogenic balloon assembly configured to have a maximum outer diameter at an inflation pressure, and wherein the cryogenic balloon assembly is configured such that, in operation, a ratio of a change in the inflation pressure (in psig) to a change in the maximum outer diameter is between 1.087:1 and 2:1, wherein the inner balloon and the outer balloon are configured such that upon inflation of the inner balloon, a portion of the inner balloon expands against a portion of the outer balloon, such that the outer balloon is inflated simultaneously with the inner balloon.