US 12,239,324 B2
Medical instrument
Yi Zhou, Shanghai (CN); Tianyu Liu, Shanghai (CN); Zexun Zhu, Shanghai (CN); Yao Yao, Shanghai (CN); and Junfei Li, Shanghai (CN)
Assigned to SHANGHAI MICROPORT CARDIOADVENT CO., LTD., Shanghai (CN)
Appl. No. 17/772,320
Filed by SHANGHAI MICROPORT CARDIOADVENT CO., LTD., Shanghai (CN)
PCT Filed Oct. 20, 2020, PCT No. PCT/CN2020/122019
§ 371(c)(1), (2) Date Apr. 27, 2022,
PCT Pub. No. WO2021/082974, PCT Pub. Date May 6, 2021.
Claims priority of application No. 201911032196.1 (CN), filed on Oct. 28, 2019.
Prior Publication US 2022/0401112 A1, Dec. 22, 2022
Int. Cl. A61B 17/12 (2006.01); A61F 2/24 (2006.01)
CPC A61B 17/12172 (2013.01) [A61F 2/24 (2013.01); A61B 2017/12054 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A medical instrument, comprising a stent having a proximal end and an opposing distal end, wherein the distal end of the stent is configured with an expanded configuration and a collapsed configuration, wherein a trailing section of the stent at the distal end comprises a plurality of protrusions, and wherein the medical instrument further comprises a constraining structure comprising a body and a clamping mechanism, the clamping mechanism disposed at a distal end of the body, the body extending from the proximal end of the stent to the distal end thereof, the clamping mechanism limiting relative movement of the protrusions by passing through all or some of the protrusions,
where the medical instrument further comprising a proximal fixation member, a distal fixation member and a pull mechanism, the proximal fixation member disposed at the proximal end of the stent and configured to bring the stent into a closed configuration at the proximal end, the pull mechanism comprising a number of pull elements each connected, at a first end, to the distal fixation member and, at a second end, to the distal end of the stent, the distal fixation member configured to be movable toward the proximal fixation member so that the distal end of the stent is allowed to switch from the expanded configuration to the collapsed configuration.