US 12,402,907 B2
Cutting balloon catheter with concealed blades
Chaosheng Liu, Guangdong (CN); Zhijun Zhang, Guangdong (CN); and Bin Li, Guangdong (CN)
Assigned to BROSMED MEDICAL CO., LTD., Dongguan (CN)
Filed by BROSMED MEDICAL CO., LTD., Guangdong (CN)
Filed on Jul. 26, 2023, as Appl. No. 18/359,583.
Claims priority of application No. 202210996349.X (CN), filed on Aug. 18, 2022.
Prior Publication US 2023/0363787 A1, Nov. 16, 2023
Int. Cl. A61B 17/3207 (2006.01); A61B 17/00 (2006.01); A61M 25/10 (2013.01)
CPC A61B 17/32075 (2013.01) [A61B 2017/00287 (2013.01); A61M 2025/1081 (2013.01); A61M 2025/1086 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A cutting balloon catheter with concealed blades, comprising:
an inner tube and an outer tube sleeved on the inner tube, and the inner tube having a distal end penetrating out of the outer tube;
a collapsible balloon, having a proximal end connected with the distal end of the outer tube and a distal end connected with the inner tube, and a pressure channel communicated with the balloon being formed by a gap between the outer tube and the inner tube;
a cutting assembly, comprising a plurality of first support rings sleeved on the outer tube and a blade group arranged on each of the first support rings, wherein the plurality of the first support rings are arranged along an axial direction of the inner tube and capable of generating radial elastic deformation and sliding freely, and two adjacent blade groups are connected with one another through a first flexible member;
a push-pull tube, sleeved on the outer tube and having a distal end connecting with the blade group close to the push-pull tube through a second flexible member;
a tip, being a hollow structure and arranged on the distal end of the inner tube, wherein the tip has a taper structure and a proximal end provided with a stopper for preventing a forward movement of the cutting assembly; and
a protective bag, having a distal end connected with the proximal end of the tip and a proximal end connected with the push-pull tube, and configured to encapsulate the balloon and the cutting assembly; wherein when the cutting assembly is pushed to the balloon by the push-pull tube, after the balloon is expanded, the blade group cuts a section of the protective bag opposite to the balloon so as to expose the blade group.