US 12,114,886 B2
Medical device and method
Kosuke Nishio, Kanagawa (JP); Junichi Kobayashi, Kanagawa (JP); Tomonori Hatta, Kanagawa (JP); and Taiga Nakano, Kanagawa (JP)
Assigned to TERUMO KABUSHIKI KAISHA, Tokyo (JP)
Filed by TERUMO KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 13, 2020, as Appl. No. 16/926,893.
Application 16/926,893 is a division of application No. 15/610,320, filed on May 31, 2017, granted, now 10,786,278.
Prior Publication US 2020/0337720 A1, Oct. 29, 2020
Int. Cl. A61B 17/3207 (2006.01); A61B 17/32 (2006.01); A61B 17/00 (2006.01); A61B 17/22 (2006.01)
CPC A61B 17/320758 (2013.01) [A61B 17/32002 (2013.01); A61B 17/3207 (2013.01); A61B 2017/00845 (2013.01); A61B 2017/22038 (2013.01); A61B 2017/320032 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A medical device for treating a stenotic region in a body lumen in a living body, the medical device comprising:
a rotatable tubular drive shaft;
a treatment member positionable in the body lumen in the living body adjacent the stenotic region and possessing an outer grinding surface for grinding the stenotic region in the body lumen in the living body, the treatment member being connected to the drive shaft so that rotation of the drive shaft results in rotation of the treatment member, and the rotation of the treatment member causing the outer grinding surface of the treatment member to grind the stenotic region in the body lumen in the living body;
the treatment member that rotates together with the rotatable tubular drive shaft possessing an axial extent, the treatment member including an axially extending lumen that extends throughout the axial extent of the treatment member;
an inner tubular member possessing oppositely located distal-most and proximal-most ends, the inner tubular member including an axially extending lumen that extends throughout an axial extent of the inner tubular member so that the lumen opens to the distal end-most of the inner tubular member and to the proximal-most end of the inner tubular member to permit passage of a guidewire, at least a distal part of the inner tubular member being positioned in the lumen of the treatment member;
the treatment member that rotates together with the rotatable tubular drive shaft being rotatable relative to the inner tubular member, the treatment member that rotates together with the rotatable tubular drive shaft including a distal-most end portion and a proximal-most end portion, an entirety of the outer grinding surface of the distal-most end portion of the treatment member that rotates together with the rotatable tubular drive shaft being exposed so that the entirety of the outer grinding surface of the distal-most end portion of the treatment member is contactable with the stenotic region in the body lumen in the living body to grind the stenotic region;
the inner tubular member including an enlarged diameter portion that is enlarged relative to an axially adjacent part of the inner tubular member, the enlarged diameter portion possessing an outer diameter;
a portion of the lumen in the treatment member possessing an inner diameter smaller than the outer diameter of the enlarged diameter portion of the inner tubular member; and
the enlarged diameter portion of the inner tubular member being positioned to contact the portion of the lumen in the treatment member that possesses the inner diameter smaller than the outer diameter of the enlarged diameter portion to limit axial movement of the inner tubular member relative to the treatment member.