US 11,690,638 B2
Medical device and procedure method
Masaomi Imai, Kofu (JP); Takahiro Chida, Kawasaki (JP); Yuki Masubuchi, Hadano (JP); Takashi Kitaoka, Hadano (JP); and Kazuaki Kanamoto, Hadano (JP)
Assigned to TERUMO KABUSHIKI KAISHA, Tokyo (JP)
Filed by TERUMO KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 22, 2021, as Appl. No. 17/382,438.
Application 17/382,438 is a continuation of application No. 16/282,436, filed on Feb. 22, 2019, granted, now 11,096,705.
Application 16/282,436 is a continuation of application No. PCT/JP2017/030309, filed on Aug. 24, 2017.
Claims priority of application No. JP2016-166617 (JP), filed on Aug. 29, 2016.
Prior Publication US 2021/0346041 A1, Nov. 11, 2021
Int. Cl. A61B 17/22 (2006.01); A61B 17/221 (2006.01); A61F 2/01 (2006.01)
CPC A61B 17/221 (2013.01) [A61B 17/22 (2013.01); A61F 2/012 (2020.05); A61F 2/013 (2013.01); A61F 2/0105 (2020.05); A61F 2/0108 (2020.05); A61B 2017/2212 (2013.01); A61B 2017/22084 (2013.01); A61F 2002/015 (2013.01); A61F 2002/016 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A medical device to be inserted into a biological lumen for collecting an object in the biological lumen, the medical device comprising:
an elongated shaft portion made of stainless steel or shape memory alloy, the elongated shaft portion possessing a distal end portion terminating at a distal-most free end;
an expansion portion that includes an elastically deformable body, the elastically deformable body possessing a proximal portion and a distal portion, the elastically deformable body including a plurality of through gaps that pass through the elastically deformable body, the proximal portion of the elastically deformable body being interlocked with the distal portion of the elongated shaft portion;
the expansion portion including a radially outwardly located annular-shaped bent portion which, in a bent state of the expansion portion, is bent toward a proximal side in an axial direction;
wherein the expansion portion in the bent state includes a first portion and a second portion, wherein the expansion portion is changeable from the bent state to an extended state, and wherein the second portion is moved to the proximal side with respect to the first portion and is pulled out from an inside of the first portion when the expansion portion changes from the bent state to the extended state; and
wherein the distal-most free end of the elongated shaft portion is proximal to the annular-shaped bent portion.