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 |