Development of intra-operative assessment system for ossicular mobility and middle ear transfer function

Takuji Koike, Yuuka Irie, Ryo Ebine, Takaaki Fujishiro, Sho Kanzaki, Chee Sze Keat, Takenobu Higo, Kenji Ohoyama, Masaaki Hayashi, Hajime Ikegami

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Objective measurements of the ossicular mobility have not been commonly performed during the surgery, and the assessment of ossicular mobility is made by palpation in most cases. Palpation is inherently subjective and may not always be reliable, especially in milder degrees of ossicular fixation and in the case of multiple fixation. Although several devices have been developed to quantitatively measure the ossicular mobility during surgery, they have not been widely used. In this study, a new system with a hand-held probe which enables intraoperative quantitative measurements of ossicular mobility has been developed. This system not only measures the ossicular mobility, but also investigates “local” transmission characteristics of the middle ear by directly applying vibration to the ossicles and measuring cochlear microphonic. The basic performance of this system was confirmed by measuring the mobility of artificial ossicles and cochlear microphonics in an animal experiment. Our system may contribute to selection of a better surgical method and reducing the risks of revision surgery.

Original languageEnglish
Pages (from-to)139-148
Number of pages10
JournalHearing Research
Publication statusPublished - 2019 Jul


  • Cochlear microphonics
  • Compliance
  • Intraoperative measurement
  • Ossicular mobility
  • Palpation

ASJC Scopus subject areas

  • Sensory Systems


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