Patent ID: 11903603
Assignee: OLYMPUS CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A  B  G  H | IPC A  B  G  H

Claim 14:
15. A method for manufacturing an ultrasound treatment tool, comprising:
assembling a distal end block that is configured to propagate ultrasonic vibration generated by an ultrasonic vibrator, the distal end block including sequentially in a direction from a proximal end to a distal end of the distal end block along a longitudinal axis:
a first portion adjacent to the ultrasonic vibrator, the first portion including a supported portion;
a second portion adjacent to the first portion; and
a third portion adjacent to the second portion, the third portion having a cross- sectional area perpendicular to the longitudinal axis different from a cross-sectional area perpendicular to the longitudinal axis of the second portion; and

determining a position at which a boundary between the second portion and the third portion corresponds to or substantially corresponds to an antinode of the ultrasonic vibration in a state in which the ultrasonic vibration is propagated at a predetermined resonance frequency as a reference position;
wherein a resonance frequency of the ultrasonic vibration differs according to the position of the boundary between the second portion and the third portion along the longitudinal axis relative to the reference position under a condition that a distance from the supported portion to a distal end of the third portion along the longitudinal axis is constant.