Ablation characteristics of menisci by various laser irradiation (193 nm-10.6 um), pulsed and continuous wave

Masato Nakagawa M.D.; Tsunenori Arai; Akira Suda; Makoto Kikuchi; Shiro Murakoshi; Katsuya Nakagawa; Minori Hashimoto; Yukio Ueda; Minoru Shidara

doi:10.1117/12.17458

1 June 1990 Ablation characteristics of menisci by various laser irradiation (193 nm-10.6 μm), pulsed and continuous wave

Masato Nakagawa M.D., Tsunenori Arai, Akira Suda, Makoto Kikuchi, Shiro Murakoshi, Katsuya Nakagawa, Minori Hashimoto, Yukio Ueda, Minoru Shidara

Author Affiliations +

Proceedings Volume 1200, Laser Surgery: Advanced Characterization, Therapeutics, and Systems II; (1990) https://doi.org/10.1117/12.17458
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

The laser ablation characteristics of the procine menisci by the various laser irradiations were studied. We employed nine laser wavelengthes from ultraviolet(UV) region to infrared(IR) region, pulsed or continuous wave(cw). They were ArF(193nm in wavelength, pulsed), KrF(248nm, pulsed), XeC1(308nm, pulsed), XeF(351nm, pulsed), Ar ion UV(351nm,cw), Ar ion visible(515nm, cw), Nd:YAG(1.06pm, cw), C0(5.3pm, cw) and C02(10.6jim, cw) lasers. All laser irradiation experiments were performed in vitro with a fixed laser beam to the menisci in air circumstance. The ablation rate and damaged layer thickness were measured. In order to compare the ablation characteristics of various laser wavelengths at the same condition, the laser irradiation energy density was kept constant to 60,J/cm2/sec. The ablation rate by the energy density of 1J/cm2 and the damaged layer thickness by the energy density of 1200J/cm2 were measured. The measured menisci ablation rate by ArF excimer laser was 9.5 (ArF 9.5), (KrF 92.1), (XeCl 74.4), (XeF 2.3), (Ar ion UV 64.8), (CO 69.5), (CO2 204.9) )ig/J. The damaged layer thickness of menisci by ArF excimer laser was 119 (ArF 119), (KrF 12), (XeCl 299), (XeF 645), (Ar ion UV 860), (CO 1105), (CO2 1209) pm. This study will investigate if the ablation characteristics depends on the wavelength of lasers and on emission mode (pulsed or cw). In the case of XeC1 excimer laser irradiation experiment, the contact irradiation to menisci in the water circumstance were carried out. The ablation rate using XeC1 excimer laser in water by the contact method was almost equal to that by the non-contact method in air. The damaged layer thickness using XeC1 excimer laser in water was considerably thin compared with that by the non-contact method in air. We expect that this study for menisci laser ablation may be contribute the progress in arthroscopic laser meniscectomy.

Citation Download Citation

Masato Nakagawa M.D., Tsunenori Arai, Akira Suda, Makoto Kikuchi, Shiro Murakoshi, Katsuya Nakagawa, Minori Hashimoto, Yukio Ueda, and Minoru Shidara "Ablation characteristics of menisci by various laser irradiation (193 nm-10.6 μm), pulsed and continuous wave", Proc. SPIE 1200, Laser Surgery: Advanced Characterization, Therapeutics, and Systems II, (1 June 1990); https://doi.org/10.1117/12.17458

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available