Laser vibrometer measurements and middle ear prostheses

Stephen Thomas Flock; John Dornhoffer; Scott Ferguson

doi:10.1117/12.275035

22 May 1997 Laser vibrometer measurements and middle ear prostheses

Stephen Thomas Flock, John Dornhoffer, Scott Ferguson

Proceedings Volume 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII; (1997) https://doi.org/10.1117/12.275035
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

Abstract

One of us has developed an improved partial ossicular replacement prosthesis that is easier to implant and, based on pilot clinical measurements, results in better high-frequency hearing as compared to patients receiving one of the alternative prostheses. It is hypothesized that the primary reason for this is because of the relatively light weight (about 25 mg) and low compliance of the prosthesis, which could conceivably result in better high frequency vibrational characteristics. The purpose of our initial work was to develop an instrument suitable for objectively testing the vibrational characteristics of prostheses. We have developed a laser based device suitable for measuring the vibrational characteristics of the oval window or other structures of the middle ear. We have tested this device using a piezoelectric transducer excited at audio frequencies, as well as on the oval window in human temporal bones harvested from cadavers. The results illustrate that it is possible to non-invasively monitor the vibrational characteristics of anatomic structures with a very inexpensive photonic device.

Citation Download Citation

Stephen Thomas Flock, John Dornhoffer, and Scott Ferguson "Laser vibrometer measurements and middle ear prostheses", Proc. SPIE 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII, (22 May 1997); https://doi.org/10.1117/12.275035

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KEYWORDS

Ear

Bone

Transducers

Signal detection

Laser development

Scanning probe lithography

Calibration

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