US 11,751,898 B2
Medical device and treatment method
Taiga Nakano, Cupertino, CA (US); Junichi Kobayashi, Cupertino, CA (US); Tomonori Hatta, San Jose, CA (US); and Kosuke Nishio, Machida (JP)
Assigned to TERUMO KABUSHIKI KAISHA, Tokyo (JP)
Filed by TERUMO KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 8, 2020, as Appl. No. 17/13,913.
Application 17/013,913 is a continuation of application No. PCT/JP2019/012385, filed on Mar. 25, 2019.
Claims priority of application No. 2018-062327 (JP), filed on Mar. 28, 2018.
Prior Publication US 2020/0397458 A1, Dec. 24, 2020
Int. Cl. A61B 17/22 (2006.01); A61B 17/32 (2006.01); A61B 17/3207 (2006.01)
CPC A61B 17/32002 (2013.01) [A61B 17/22 (2013.01); A61B 17/320758 (2013.01); A61B 2017/22078 (2013.01); A61B 2017/320032 (2013.01); A61B 2217/005 (2013.01); A61B 2217/007 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A medical device for removing an object inside a biological lumen, comprising:
a rotatable drive shaft extending along an axial direction and rotatable about a rotation axis that extends in the axial direction;
a rotatable outer tube in which is rotatably accommodated the drive shaft, the outer tube being rotatable relative to the drive shaft and including a lumen, the outer tube possessing an open distal end and an open proximal end;
a cutter fixed to a distal portion of the drive shaft to cut the object, a distal portion of the cutter being positioned distally beyond the open distal end of the outer tube;
a hub unit in which a portion of the drive shaft and a proximal portion of the outer tube are disposed,
the hub unit comprising:
an operation unit fixed to an outer peripheral surface of the outer tube so that the operation unit and the outer tube rotate together;
a first support portion that rotatably supports the operation unit, the operation unit being rotatable relative to the first support portion;
a housing having a port for discharging a fluid to outside the medical device, the lumen of the outer tube being in communication with the port by way of the open proximal end of the outer tube so that the fluid in the lumen of the outer tube flows in a proximal direction toward the open proximal end of the outer tube, exits the lumen of the outer tube at the open proximal end of the outer tube and enters the port to flow to outside the medical device;
a first seal portion disposed between the housing and the outer tube, or between the housing and the operation unit; and
the first support portion and the first seal portion being disposed parallel along the axial direction.