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Proceedings Paper

Acoustical measurements during Erbium:YAG laser ablation of porcine calcified tissues
Author(s): Randall R. Saaf; Brian Jet-Fei Wong; Thomas E. Milner; George M. Peavy; Bahman Anvari
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Paper Abstract

The Erbium:YAG laser ((lambda) equals 2.94 micrometer) has been suggested for use in dental, orthopedic, and middle ear surgery due to decreased thermal trauma, precise ablation characteristics, and potential fiber optic delivery. While there has been much focus on the thermal and photoacoustic events that occur during pulsed laser ablation of hard tissue, there are few studies that examine the acoustic energy generated by these devices during ablation from an audiologic standpoint. In this study, the porcine otic capsule, nasal bone, and teeth were irradiated with an Erbium:YAG laser. Frequencies of 5 and 10 Hz shot repetition rate were used with .5 to 4 W average power. Additionally, a burst mode consisting of three pulses was used with .2 to 1.4 J total energy. During ablation, acoustic measurements were made using a sound level meter held 20 mm away from the target site. A constant spot size of 500 micrometer was maintained for each laser blast. With each set of laser parameters, the sound intensity (dB SPL) exceeded 70 dB. Peak intensity measurements of 95 dB were measured. The clinical significance of these findings is discussed and the acoustical aspects of middle ear function and noise trauma are reviewed.

Paper Details

Date Published: 1 July 1998
PDF: 8 pages
Proc. SPIE 3245, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VIII, (1 July 1998); doi: 10.1117/12.312294
Show Author Affiliations
Randall R. Saaf, Harvey Mudd College (United States)
Brian Jet-Fei Wong, Beckman Laser Institute and Medical Clinic and Univ. of California/Irvine School of Medici (United States)
Thomas E. Milner, Harvey Mudd College, Beckman Laser Institute and Medical Clinic and Univ. of Texas/Austin (United States)
George M. Peavy, Univ. of California/Irvine (United States)
Bahman Anvari, Harvey Mudd College, Beckman Laser Institute and Medical Clinic and Rice Univ. (United States)


Published in SPIE Proceedings Vol. 3245:
Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VIII
Graham M. Watson; Harvey Lui; Lou Reinisch; Penny J. Smalley; Kenneth Eugene Bartels; R. Rox Anderson; Lawrence S. Bass; Kenneth Eugene Bartels; C. Gaelyn Garrett; Lloyd P. Tate; Sharon L. Thomsen; Reza S. Malek; Aaron P. Perlmutter; R. Rox Anderson; Lawrence S. Bass; C. Gaelyn Garrett; Kenton W. Gregory; Harvey Lui; Reza S. Malek; Aaron P. Perlmutter; Lou Reinisch; Penny J. Smalley; Lloyd P. Tate; Sharon L. Thomsen; Graham M. Watson, Editor(s)

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