Share Email Print

Journal of Biomedical Optics

Characteristics of laser-induced shock wave injury to the inner ear of rats
Author(s): Takaomi Kurioka; Takeshi Matsunobu; Katsuki Niwa; Atsushi Tamura; Satoko Kawauchi; Yasushi Satoh; Shunichi Sato; Akihiro Shiotani
Format Member Price Non-Member Price
PDF $20.00 $25.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Recently, the number of blast injuries of the inner ear has increased in the general population. In blast-induced inner ear injury, a shock wave (SW) component in the blast wave is considered to play an important role in sensorineural hearing loss. However, the mechanisms by which an SW affects inner ear tissue remain largely unknown. We aimed to establish a new animal model for SW-induced inner ear injury by using laser-induced SWs (LISWs) on rats. The LISWs were generated by irradiating an elastic laser target with 694-nm nanosecond pulses of a ruby laser. After LISW application to the cochlea through bone conduction, auditory measurements revealed the presence of inner ear dysfunction, the extent of which depended on LISW overpressure. A significantly lower survival rate of hair cells and spiral ganglion neurons, as well as severe oxidative damage, were observed in the inner ear exposed to an LISW. Although considerable differences in the pressure characteristics exist between LISWs and SWs in real blast waves, the functional and morphological changes shown by the present LISW-based model were similar to those observed in real blast-induced injury. Thus, our animal model is expected to be useful for laboratory-based research of blast-induced inner ear injury.

Paper Details

Date Published: 2 December 2014
PDF: 7 pages
J. Biomed. Opt. 19(12) 125001 doi: 10.1117/1.JBO.19.12.125001
Published in: Journal of Biomedical Optics Volume 19, Issue 12
Show Author Affiliations
Takaomi Kurioka, National Defense Medical College (Japan)
Takeshi Matsunobu, National Defense Medical College (Japan)
Katsuki Niwa, National Defense Medical College (Japan)
Atsushi Tamura, National Defense Medical College (Japan)
Satoko Kawauchi, National Defense Medical College (Japan)
Yasushi Satoh, National Defense Medical College (Japan)
Shunichi Sato, National Defense Medical College (Japan)
Akihiro Shiotani, National Defense Medical College (Japan)

© SPIE. Terms of Use
Back to Top