US 11,963,708 B2
Left atrial appendage occluder and occlusion system
Anning Li, Shenzhen (CN); and Shuo Shan, Shenzhen (CN)
Assigned to LIFETECH SCIENTIFIC (SHENZHEN) CO., LTD., Shenzhen (CN)
Appl. No. 17/779,694
Filed by LIFETECH SCIENTIFIC (SHENZHEN) CO., LTD., Guangdong (CN)
PCT Filed Dec. 15, 2020, PCT No. PCT/CN2020/136418
§ 371(c)(1), (2) Date May 25, 2022,
PCT Pub. No. WO2021/129455, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 201911376599.8 (CN), filed on Dec. 27, 2019; and application No. 201911379612.5 (CN), filed on Dec. 27, 2019.
Prior Publication US 2022/0409255 A1, Dec. 29, 2022
Int. Cl. A61B 18/02 (2006.01); A61B 17/12 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/02 (2013.01) [A61B 17/12122 (2013.01); A61B 17/12172 (2013.01); A61B 2018/00357 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/0063 (2013.01); A61B 2018/0212 (2013.01); A61B 2018/0287 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A left atrial appendage (LAA) occluder, comprising:
a fixing portion,
a sealing portion that is disc-shaped and internally hollow, the sealing portion being located on a proximal side of the fixing portion and connected to a proximal end of the fixing portion;
an ablation portion arranged in an interior space of the sealing portion, and
a hollow proximal connector arranged at a proximal end of the sealing portion,
wherein the ablation portion is connected to the proximal connector, the ablation portion is configured to freeze an LAA after being injected with cryogen so as to form an annular isolation band on an inner wall of the LAA, the annular isolation band is configured to block the conduction of electrical signals between the LAA and a left atrium, when the sealing portion is in a compressed state, the ablation portion is folded and accommodated in the sealing portion, and the ablation portion abuts against a circumferential edge of the sealing portion after being unfolded in the sealing portion; and
wherein the ablation portion comprises a double-cavity bent tube which is unfolded to be annular and abuts against a proximal wall of the sealing portion, one end of the double-cavity bent tube is fixed on to an inner wall of the hollow proximal connector, and the end of the double-cavity bent tube has two openings that are configured to inject and discharge cryogen respectively.