Ultrasonic treatment instrument

Patent metadata

Field	Value
Publication number	US-10098655-B2
Application number	US-201715489419-A
Country	US
Kind code	B2
Filing date	Apr 17, 2017
Priority date	May 12, 2015
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

An ultrasonic treatment instrument includes a vibration transmitting member transmitting ultrasonic vibration toward a first gripper and formed as one piece, and a second gripper movable between a spaced position where the second gripper is spaced apart from the first gripper and a closed position where the second gripper is put in close to the first gripper. The ultrasonic treatment instrument includes an interlocking actuator increasing, by moving the first gripper in interlock with a movement of the second gripper to the spaced position, a spacing distance between the first gripper and the second gripper in accordance with a movement of the first gripper.

First claim

What is claimed is:

1. An ultrasonic treatment instrument comprising:
a one piece vibration transmitting member having a longitudinal axis and a first gripper in a distal portion thereof, and configured to transmit ultrasonic vibration to the first gripper;
a second gripper (1) having a gripping surface and (2) which is movable between an open position in which the gripping surface is spaced from the first gripper and a closed position in which the gripping surface is adjacent to the first gripper;
a tube (1) fixed to and surrounding a portion of the vibration transmitting member, (2) having an outer cylindrical surface, and (3) having a lower vibration transmissibility than the vibration transmitting member, the tube having a groove in the outer cylindrical surface;
a movable cylindrical shaft that encases a part of the tube and the vibration transmitting member;
a handle that moves the movable cylindrical shaft when the handle is operated;
a slider which is attached on an outer surface of the movable cylindrical shaft, and to which the handle is coupled; and
an elastic member which extends on the outer surface of the movable cylindrical shaft, and which connects the movable cylindrical shaft and the slider; wherein:
movement of the movable cylindrical shaft causes the second gripper to move between the open position and the closed position; and
the movable cylindrical shaft includes an inwardly extending projection that slidably engages the groove in the outer cylindrical surface of the tube to rotate the vibration transmitting member and the tube when the movable cylindrical shaft is moved in synchronization with the movement of the second gripper, such that the first gripper is in a first position when the second gripper is in the open position and the first gripper is in a second position when the second gripper is in the closed position.

2. The ultrasonic treatment instrument of claim 1 , wherein the first gripper is curved relative to the longitudinal axis.

3. The ultrasonic treatment instrument of claim 2 , wherein:
the movable cylindrical shaft is configured to slide linearly along the longitudinal axis of the vibration transmitting member; and
the inwardly extending projection of the movable cylindrical shaft and the groove in the outer cylindrical surface of the tube are configured to convert the linear movement of the movable cylindrical shaft to a rotational movement of the vibration transmitting member and the tube around the longitudinal axis of the vibration transmitting member.

4. The ultrasonic treatment instrument of claim 3 , further comprising:
a cylindrical sheath that encases the movable cylindrical shaft and through which the vibration transmitting member is inserted in a state in which the first gripper projects toward a distal side of the cylindrical sheath, the second gripper being rotatably attached to a distal portion of the cylindrical sheath; and
a housing having distal and proximal sides, the cylindrical sheath is coupled to the distal side of the housing in a manner to be rotatable relative to the housing around the longitudinal axis of the vibration transmitting member;
wherein:
the tube and the movable cylindrical shaft are configured to rotate around the longitudinal axis of the vibration transmitting member together with the cylindrical sheath;
the groove includes a first groove portion and a second groove portion, the first groove portion and the second groove portion being continuous;
the inwardly extending projection of the movable cylindrical shaft and the groove in the outer cylindrical surface of the tube are configured and located such that when the inwardly extending projection of the movable cylindrical shaft is in the first groove portion of the groove in the outer cylindrical surface of the tube, the second gripper is in the open position; and
rotational driving force is transmitted to the tube and the vibration transmitting member by the movement of the inwardly extending projection of the movable cylindrical shaft through the second groove portion.

5. The ultrasonic treatment instrument of claim 4 , wherein:
the groove includes a third groove portion continuous with the second groove portion opposite the first groove portion; and
when the inwardly extending projection of the movable cylindrical shaft is in the third groove portion, the second gripper is in the closed position.

Assignees

• Olympus Corp

Inventors

• Miyajiri Satoshi
• Morisaki Kazuhiro
• Hirai Yuji
• Onaga Takeshi
• Ide Katsushi

Classifications

• A61B17/320092 Primary

  with additional movable means for clamping or cutting tissue, e.g. with a pivoting jaw · CPC title

• A61B2018/00589

  Coagulation · CPC title

• A61N7/00

  Ultrasound therapy (lithotripsy A61B17/22, A61B17/225; massage using supersonic vibration A61H23/00 {; using ultrasound for introducing media into the body A61M37/0092}) · CPC title

• A61B2018/00607

  Coagulation and cutting with the same instrument · CPC title

• A61B2017/00393

  with means for switching between functions · CPC title