US 11,779,450 B2
Filter device
Yongfeng Zhu, Shanghai (CN); Qing Zhu, Shanghai (CN); Zhonghua Li, Shanghai (CN); Linlin Zhang, Shanghai (CN); Wenhui Jiao, Shanghai (CN); Jianchao Han, Shanghai (CN); and Yanbin Gao, Shanghai (CN)
Assigned to SHANGHAI BLUEVASCULAR MEDTECH CO., LTD., Shanghai (CN)
Appl. No. 16/627,592
Filed by SHANGHAI MICROPORT ENDOVASCULAR MEDTECH CO., LTD., Shanghai (CN)
PCT Filed Aug. 9, 2018, PCT No. PCT/CN2018/099490
§ 371(c)(1), (2) Date Dec. 30, 2019,
PCT Pub. No. WO2019/033977, PCT Pub. Date Feb. 21, 2019.
Claims priority of application No. 201710714197.9 (CN), filed on Aug. 18, 2017.
Prior Publication US 2020/0129281 A1, Apr. 30, 2020
Int. Cl. A61F 2/01 (2006.01); A61F 2/04 (2013.01)
CPC A61F 2/0105 (2020.05) [A61F 2/0108 (2020.05); A61F 2/04 (2013.01); A61F 2002/016 (2013.01); A61F 2002/018 (2013.01); A61F 2310/00365 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A filter device, comprising:
a filtering part having a first end and a second end opposite to each other along an axial direction of the filtering part;
a stent part having a first end and a second end opposite to each other along the axial direction, and the stent part being disposed coaxial with the filtering part;
a degradable constraining part configured to constrain the first end of the filtering part and/or the second end of the stent part; and
a connecting part configured to be connected to an external mechanism; when the connecting part is connected to the external mechanism, and before the filtering part loses constraint from the constraining part, the filter device is able to be pulled through the connecting part, so that the filter device is taken out from human body;
wherein the connecting part is disposed only at the second end of the stent part;
wherein the filter device has a head end and a tail end opposite to each other, the first end of the filtering part corresponds to the head end of the filter device, and the second end of the stent part corresponds to the tail end of the filter device;
wherein the stent part comprises a support part and a retrieving part; one end of the support part is connected to the second end of the filtering part and to one end of the retrieving part; a further end of the support part serves as the first end of the stent part, a further end of the retrieving part serves as the second end of the stent part, and the further end of the retrieving part is constrained by the constraining part to form the tail end;
wherein the support part, in a partial or an entire length thereof, is overlapping with the filtering part in an axial direction of the filter device; the first end of the filtering part is connected to the support part at a position thereof other than a position where the second end of the filtering part is connected to the one end of the support part;
wherein the first end of the filtering part is located at ½ height of the support part along the axial direction of the filtering part.