US 11,980,378 B2
Calculus crushing device
Tomoki Hatsuda, Tokyo (JP)
Assigned to OLYMPUS CORPORATION, Tokyo (JP)
Filed by OLYMPUS CORPORATION, Tokyo (JP)
Filed on Dec. 10, 2020, as Appl. No. 17/117,382.
Application 17/117,382 is a continuation of application No. PCT/JP2018/024182, filed on Jun. 26, 2018.
Prior Publication US 2021/0093343 A1, Apr. 1, 2021
Int. Cl. A61B 17/22 (2006.01); A61B 17/221 (2006.01)
CPC A61B 17/22022 (2013.01) [A61B 17/221 (2013.01); A61B 2017/22025 (2013.01); A61B 2017/2215 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A treatment device comprising:
a tubular sheath having a central axis;
an operating wire disposed inside the sheath so as to be movable along the central axis;
a grasping part provided at a distal end of the operating wire, the grasping part having a plurality of wires; and
at least one bipolar electrode disposed at a distal end of the sheath, the at least one bipolar electrode is configured to apply a shock to a processing target grasped by the grasping part,
wherein the sheath has, at intervals in a circumferential direction, a plurality of escape grooves, each of the plurlaity of escape grooves being configured to:
extend from a distal end surface of the sheath toward a proximal end of the sheath, and
penetrate from an inner circumferential surface of the sheath to an outer circumferential surface of the sheath,
each of the plurlaity of escape grooves is dimensioned to allow a respective wire of the plurality of wires to pass therethrough;
the at least one bipolar electrode is disposed at a position shifted radially outward from the central axis and at a position between two escape grooves of the plurality of escape grooves in the circumferential direction; and
a distal end of the at least one bipolar electrode is positioned closer to distal ends of the two escape grooves than to proximal ends of the two escape grooves.