Laser Ablation of Biological Tissue Using Pulsed CO{sub 2} Laser

Journal Article · Wed Oct 13 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3508558· OSTI ID:21428638

Hashishin, Yuichi; Sano, Shu; Nakayama, Takeyoshi ^[1]

---

1. School of Science and Engineering, Electric and Electronics Engineering, Kinki University, 3-4-1 Kowakae, Higashi-Osaka City, Osaka, 577-8502 (Japan)

Laser scalpels are currently used as a form of laser treatment. However, their ablation mechanism has not been clarified because laser excision of biological tissue occurs over a short time scale. Biological tissue ablation generates sound (laser-induced sound). This study seeks to clarify the ablation mechanism. The state of the gelatin ablation was determined using a high-speed video camera and the power reduction of a He-Ne laser beam. The aim of this study was to clarify the laser ablation mechanism by observing laser excision using the high-speed video camera and monitoring the power reduction of the He-Ne laser beam. We simulated laser excision of a biological tissue by irradiating gelatin (10 wt%) with radiation from a pulsed CO{sub 2} laser (wavelength: 10.6 {mu}m; pulse width: 80 ns). In addition, a microphone was used to measure the laser-induced sound. The first pulse caused ablation particles to be emitted in all directions; these particles were subsequently damped so that they formed a mushroom cloud. Furthermore, water was initially evaporated by laser irradiation and then tissue was ejected.

• OSTI ID: 21428638
• Journal Information: AIP Conference Proceedings, Vol. 1282, Issue 1; Conference: 7. international symposium on applied plasma science, Hamburg (Germany), 31 Aug - 4 Sep 2009; Other Information: DOI: 10.1063/1.3508558; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ABLATION
BIOLOGICAL MATERIALS
CARBON DIOXIDE LASERS
GELATIN
HELIUM-NEON LASERS
LASER RADIATION
MUSHROOMS
PULSED IRRADIATION
SIMULATION
SOUND WAVES
TELEVISION CAMERAS
CAMERAS
COLLOIDS
DISPERSIONS
ELECTROMAGNETIC RADIATION
FUNGI
GAS LASERS
IRRADIATION
LASERS
MATERIALS
ORGANIC COMPOUNDS
PLANTS
PROTEINS
RADIATIONS