US 12,453,576 B2
Medical device
Kosuke Nishio, Machida (JP); Tomonori Hatta, San Jose, CA (US); Taiga Nakano, Cupertino, CA (US); and Junichi Kobayashi, Cupertino, CA (US)
Assigned to TERUMO KABUSHIKI KAISHA, Tokyo (JP)
Filed by TERUMO KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 11, 2020, as Appl. No. 17/118,886.
Application 17/118,886 is a continuation of application No. PCT/IB2019/058115, filed on Sep. 25, 2019.
Claims priority of application No. 2018-146319 (JP), filed on Aug. 2, 2018.
Prior Publication US 2021/0093349 A1, Apr. 1, 2021
Int. Cl. A61B 17/3207 (2006.01); A61M 25/09 (2006.01); A61B 17/00 (2006.01); A61B 17/32 (2006.01)
CPC A61B 17/320758 (2013.01) [A61B 2217/005 (2013.01); A61B 2217/007 (2013.01); A61M 25/09 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A medical device for removing an object inside a biological lumen, comprising:
a rotatable drive shaft;
a cutting portion fixed to a distal portion of the drive shaft and configured to cut the object;
an outer tube configured to accommodate the drive shaft;
a handle unit, the handle unit configured to accommodate a proximal portion of the drive shaft and a proximal portion of the outer tube, the handle unit including an aspiration port configured to discharge a liquid outside of the handle unit, and the aspiration port configured to communicate with an aspiration lumen located between the outer tube and the drive shaft;
the drive shaft including a first wire rod helically wound around an axis of the drive shaft, and wherein the first wire rod is configured to directly face an inner peripheral surface of the outer tube;
wherein a helical winding direction of the first wire rod wound toward a proximal end direction of the drive shaft is a reverse direction of a rotational direction of the drive shaft;
the drive shaft includes a first drive shaft including the first wire rod and a second drive shaft including a second wire rod, and a distal end of the second drive shaft is located proximal to a proximal end of the first drive shaft, and the proximal end of the first drive shaft is interlocked with the distal end of the second drive shaft;
a winding direction of the second wire rod being a reverse direction of the winding direction of the first wire rod;
an inner tube disposed between the second drive shaft and the outer tube;
a lumen formed between the inner tube and the second drive shaft, and wherein the lumen formed between the inner tube and the second drive shaft is a liquid delivering lumen that delivers a liquid in a distal direction; and
wherein a distal end of the inner tube is located on a proximal side of the distal end of the second drive shaft, and a proximal portion of the inner tube is fixed to the handle unit.