Author(s)

Rina Sakai^1,2, Katsufumi Uchiyama^2,3, Shun Nishizawa⁴, Tomomi Mizuhashi², Takeaki Yamamoto⁵, Kazuhiro Yoshida^1,2, Kensuke Fukushima³, Naonobu Takahira^1,2,3, Masanobu Ujihira^1,2

¹Department of Medical Engineering and Technology, Kitasato University School of Allied Health Sciences, Kanagawa, Japan.
²Kitasato University Graduate School of Medical Sciences, Kanagawa, Japan.
³Department of Orthopedic Surgery, Kitasato University School of Medicine, Kanagawa, Japan.
⁴Department of Clinical Engineering, St. Luke’s International Hospital, Tokyo, Japan.
⁵Department of Orthopedic Surgery, St. Marianna University School of Medicine, Kanagawa, Japan.

In total hip arthroplasty, intraoperative femoral fractures can be avoided by analyzing the hammering sounds from the stem inserted into the femur. This procedure is based on a hammering test that makes use of the fact that sound depends on the stability of the object. This technique is generally used in engineering. A system designed to avoid excessive stem hammering by predicting the intraoperative fracture risk based on this technique and software for real-time spectra analysis has been developed with repetitive improvements. The remaining technical challenge lies in selecting an appropriate sound collection device and building a compact and easy unit for use. This study reviewed the types of directional microphones suitable for the sound collection system to develop a practical THA support system. Four types of microphones based on selected methods were used to collect and compare the peak frequencies of the hammering sounds and make comparisons between them, and the built system was used to conduct clinical trials. For miniaturization and operational ease of the unit, plug-in unidirectional microphones are appropriate. However, no laboratory-level data has been collected, and thus, further data accumulation is necessary.

Intraoperative Fractures, Total Hip Arthroplasty, Hammering Sound, Fourier Analysis, Peak Frequency

Sakai, R. , Uchiyama, K. , Nishizawa, S. , Mizuhashi, T. , Yamamoto, T. , Yoshida, K. , Fukushima, K. , Takahira, N. and Ujihira, M. (2022) Selection of Hammering Sound Collection Devices for the Development of Total Hip Arthroplasty Support Systems. Journal of Biomedical Science and Engineering, 15, 179-186. doi: 10.4236/jbise.2022.157016.