標題: Electromagnetic/Magnetic-Coupled Targeting System for Screw-Hole Locating in Intramedullary Interlocking-Nail Surgery
作者: Wong, Tze-Hong
Chung, Tien-Kan
Liu, Tzu-Wei
Chu, Hou-Jen
Hsu, Wensyang
Yeh, Po-Chen
Chen, Chin-Chung
Lee, Meng-Shiue
Yang, Yuh-Shyong
機械工程學系
生物科技學系
Department of Mechanical Engineering
Department of Biological Science and Technology
關鍵字: Interlocking nail;orthopedic surgery;electromagnetic;magnetic;targeting;locating
公開日期: 1-十二月-2014
摘要: At present, intramedullary interlocking nails are widely used for bone-fracture fixation in orthopedic surgeries. Surgeons often use X-ray imaging to find the actual location of the distal screw-holes of the nail after the nail is inserted into the medullary canal of a bone for fixation. Thus, the patients and medical team are inevitably exposed to radioactivity. In this paper, we report a radiation-free electromagnetic/magnetic-coupled targeting system to locate the distal screw-holes of the nail used in interlocking-nail surgery. The targeting system consists of a c-shaped electromagnet with a pick-up coil, a highly permeable curved silicon-steel strip embedded on the nail, a guiding mechanism, and electronic measuring instruments. An alternative current is applied to the electromagnet to generate a uniform magnetic field/flux in the electromagnet\'s air gap. When the nail inserted into the medullary canal of a bone is scanned through or rotated in the air gap of the electromagnet, the magnetic flux in the air gap is influenced by the silicon-steel strip embedded on the nail. The variation of the magnetic flux induces a voltage response in the pick-up coil due to electromagnetic induction. The pattern of the voltage response is analyzed to establish a criterion for screw-hole targeting. The results obtained using this criterion reveal that the maximum targeting error of the location and orientation targeting for a screw-hole with a diameter of 5 mm is <2 mm and 10 degrees, respectively. Thus, the system/approach is sufficiently simple and accurate to be used by surgeons in clinical surgery.
URI: http://dx.doi.org/10.1109/JSEN.2014.2334139
http://hdl.handle.net/11536/123867
ISSN: 1530-437X
DOI: 10.1109/JSEN.2014.2334139
期刊: IEEE SENSORS JOURNAL
Volume: 14
Issue: 12
起始頁: 4402
結束頁: 4410
顯示於類別:期刊論文


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