Femtosecond laser ablation of the stapes.
A femtosecond laser, normally used for LASIK eye surgery, is used to perforate cadaveric human stapes. The thermal side effects of bone ablation are measured with a thermocouple in an inner ear model and are found to be within acceptable limits for inner ear surgery. Stress and acoustic events, recorded with piezoelectric film and a microphone, respectively, are found to be negligible. Optical microscopy, scanning electron microscopy, and optical coherence tomography are used to confirm the precision of the ablation craters and lack of damage to the surrounding tissue. Ablation is compared to that from an Er:YAG laser, the current laser of choice for stapedotomy, and is found to be superior. Ultra-short-pulsed lasers offer a precise and efficient ablation of the stapes, with minimal thermal and negligible mechanical and acoustic damage. They are, therefore, ideal for stapedotomy operations.
McCaughey
Ryan G
RG
University of California, Irvine, Beckman Laser Institute and Medical Clinic, 1002 Health Sciences Road, Irvine, Calfornia 92612, USA. rmccaugh@uci.edu
Sun
Hui
H
Rothholtz
Vanessa S
VS
Juhasz
Tibor
T
Wong
Brian J F
BJ
D000818:Animals; D006801:Humans; D066298:In Vitro Techniques; D053685:Laser Therapy / Q000295:instrumentation* / Q000379:methods*; D010027:Osteotomy / Q000295:instrumentation* / Q000379:methods*; D013199:Stapes / Q000166:cytology*; D013201:Stapes Surgery / Q000295:instrumentation* / Q000379:methods*; D013552:Swine