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Article Title: Development of Total Hip Arthroplasty Support System for Predicting Intraoperative Fractures by the Frequency of Hammering Sound
Author: Rina Sakai*, Katsufumi Uchiyama, Shun Nishizawa, Tomomi Mizuhashi, Takeaki Yamamoto, Kazuhiro Yoshida, Kensuke Fukushima, Naonobu Takahira and Masanobu Ujihira
Published Date: June 20, 2022
In total hip arthroplasty (THA), orthopedic surgeons can determine the stability of the fixed hip stem based on the changes in the hammering sound, which is not a myth. It has been observed through Fourier analysis that the hammering sound changes. This study aimed to check whether it is possible to determine how stable the hip stem is fixed in real-time by collecting hammering sounds in operating rooms. First, a hammering sound analysis system was built, and an application was developed. Next, the analysis system was used to measure the frequencies and levels of hammering sounds along with ambient sounds to review the ideal position for collecting sounds. In all 12 analyzed cases, stem stability was successfully determined in real-time. It was revealed that the analysis system was less likely to fail to detect sounds when sounds were collected at a position near the patient’s head. It is possible to distinguish the voices of the medical staff, a major ambient sound in the operating room, from the hammering sounds. However, it is difficult to distinguish the peak frequencies of produced sounds when surgical instruments are in contact with those of hammering sounds because their frequency ranges are almost the same, and solving this problem is the greatest challenge.