𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Mid-Infrared laser ablation of the cornea: A comparative study

✍ Scribed by Dr. Qiushi Ren; Vasan Venugopalan; Kevin Schomacker; Thomas F. Deutsch; Thomas J. Flotte; Carmen A. Puliafito; Reginald Birngruber

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
774 KB
Volume
12
Category
Article
ISSN
0196-8092

No coin nor oath required. For personal study only.

✦ Synopsis

The ablation thresholds and patterns of collateral damage in cornea produced by Er:YAG (2.94 pm) and Er:YSGG (2.79 pm) lasers were measured. Two different pulse durations, 200 ps (normal spiking mode) and 100 ns (Q-switched mode), were used at both wavelengths. In the normal spiking mode, damage zones of 16 f 2 pm and 39 f 7 pm and ablation thresholds of 250 f 20 mJ/cm2 and 420 f 35 mJ/cm2 were measured at 2.94 pm and 2.79 pm, respectively. In the Q-switched mode, damage zones of 4 2 2 pm and ablation thresholds of 150 k 10 mJ/cm2 were found irrespective of the laser used. The similarity between the results using the Er:YAG and Er:YSGG lasers in the Q-switched mode suggest that either laser can be used with equal effectiveness for corneal trephination.

πŸ“œ SIMILAR VOLUMES

Far-ultraviolet laser ablation of the co
Far-ultraviolet laser ablation of the cornea: Photoacoustic studies
✍ Dr. R. Srinivasan; Dr. Peter E. Dyer; Bodil Braren πŸ“‚ Article πŸ“… 1987 πŸ› John Wiley and Sons 🌐 English βš– 477 KB

Wide bandwidth piezoelectric transducers made of thin (9 pm) polyvinylidene fluoride filni have been used to make time-resolved measurements of the stresswave generated by far-ultraviolet (193 nm) laser ablation in corneal tissue in v i m . At high fluence ( -250 ml/cm2), ablation commences within

Ablation of bone and methacrylate by a p
Ablation of bone and methacrylate by a prototype mid-infrared erbium:YAG laser
✍ J. Stuart Nelson; Lindy Yow; L.-H. Liaw; Lachlan Macleay; Rhonda B. Zavar; Arie πŸ“‚ Article πŸ“… 1988 πŸ› John Wiley and Sons 🌐 English βš– 884 KB

An erbium:YAG laser was used to generate 200-microseconds pulses of mid-infrared 2.94-microns light in both the single and multimode configurations. Laser pulses were focused on the surfaces of both rabbit long bones and methacrylate blocks, and the tissue response was examined histologically. The d

Endometrial laser ablation in rabbits: A
Endometrial laser ablation in rabbits: A comparative study of three laser types
✍ Dr. Carlos Rosenberg; Yona Tadir; Diana Braslavsky; Benjamin Fisch; Ziv Karni; J πŸ“‚ Article πŸ“… 1990 πŸ› John Wiley and Sons 🌐 English βš– 620 KB

## Abstract Endometrial laser ablation is one of the alternatives to hysterectomy in cases of intractable uterine bleeding. It is currently performed using the Nd:YAG laser at 1.06 ΞΌm. The aim of this study was to compare the tissue effect of three types of laser irradiation (Nd:YAG laser at 1.06 a

Quantitative and ultrastructural studies
Quantitative and ultrastructural studies of excimer laser ablation of the cornea at 193 and 248 nanometers
✍ Carmen A. Puliafito; Kai Wong; Roger F. Steinert πŸ“‚ Article πŸ“… 1987 πŸ› John Wiley and Sons 🌐 English βš– 626 KB

Excimer laser radiation at 193 nm and 248 nm was used to create linear etch perforations of enucleated calf corneas. The etch depth per pulse was determined for various exposures, and specimens were examined by light and transmission electron microscopy. Compared to 248 nm, excimer laser ablation at

Mechanisms for soft-tissue ablation and
Mechanisms for soft-tissue ablation and the development of alternative medical lasers based on investigations with mid-infrared free-electron lasers
✍ G.S. Edwards πŸ“‚ Article πŸ“… 2009 πŸ› John Wiley and Sons 🌐 English βš– 204 KB πŸ‘ 1 views

## Abstract Experimental evidence indicating the potential biomedical advantages of using a Mark‐III Free‐Electron Laser (FEL) for the ablation of soft tissue were first reported in 1994. Research progress since that time is reviewed, including: 1) successful human surgery using the Mark‐III FEL; 2