作者: Arash Arami , Jean-Romain Delaloye , Hossein Rouhani , Brigitte M. Jolles , Kamiar Aminian
DOI: 10.1007/S10439-017-1941-2
关键词: Knee implant 、 Vibrator (mechanical) 、 Coherence (signal processing) 、 Implant 、 Computer science 、 Knee prosthesis 、 Accelerometer 、 Tibia 、 Vibration 、 Biomedical engineering
摘要: Knee implant loosening is mainly caused by the weakness of prosthesis-bone interface and main reason for surgical revisions. However, pre-operative diagnosis difficult due to lack accurate tests. In this study, we developed a vibration-based system detect tibial an instrumented knee prosthesis. The proposed includes vibrator transcutaneous stimulation bone in repeatable manner, accelerometer sensors integrated into implants measure propagated vibration. A coherence-based detection technique was distinguish loosened from secure ones. Fourteen ex vivo lower limbs were used, on which prosthesis implanted, harmonic-forced vibration applied tibia. input-output coherence provided 92.26% accuracy, high sensitivity (91.67%) specificity (92.86%). This benchmarked against power spectrum based analysis implant. particular, new peak appearance, shift, flattening spectra showed inferior performance technique. As such, application our together with enabled us loose implants.