Related Experiment Video
Updated: Feb 8, 2026

Three-Dimensional Finger Motion Tracking during Needling: A Solution for the Kinematic Analysis of Acupuncture Manipulation
Published on: October 28, 2021
[Bladder stone secondary to migration of an acupuncture needle]
Koji Izumi1, Akitoshi Takizawa, Koichi Udagawa
1Department of Urology, International Goodwill Hospital.
Abstract:
A 61-year-old man who had been suffering from benign prostatic hyperplasia (BPH) for ten years visited our hospital complaining of dysuria and bladder pain. Abdominal X-ray showed a 2 cm calculus containing a needle-like shadow in the pelvis. Transurethral lithotripsy and trunsurethral resection of the prostate (TURP) were done. The calculus was a brown club-shaped bladder stone with the core being a 2 cm needle one side of which was broken. It was supposed to be an acupuncture needle that was retained in his back twenty years ago. This is the first case of a bladder stone secondary to migration of an acupuncture needle.
Related Concept Videos
Types of Building Stone
Igneous rocks are formed from the solidification of magma or lava. An example is granite, known for its durability and resistance to weathering, making it ideal for parts of...
Quarrying of Stone
One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the...
Stone Masonry
Secondary Active Transport
Secondary Healthcare System
Primary and Secondary Growth in Roots and Shoots

