Deep sclerectomy using erbium:YAG laser in pig’s eyes

Yehia A. Badr D.D.S.; Ibrahim M. Taher M.D.; Mostafa M. Bahgat M.D.; Dina F. Ghoneim M.D.

doi:10.1117/12.522751

13 July 2004 Deep sclerectomy using erbium:YAG laser in pigs eyes

Yehia A. Badr D.D.S., Ibrahim M. Taher M.D., Mostafa M. Bahgat M.D., Dina F. Ghoneim M.D.

Proceedings Volume 5314, Ophthalmic Technologies XIV; (2004) https://doi.org/10.1117/12.522751
Event: Biomedical Optics 2004, 2004, San Jose, CA, United States

Abstract

The potential benefits of using pulsed Erbium: YAG laser in removing the deep lamella of the sclera during the procedure of deep sclerectomy was studied. Thirty porcine eyes were divided into 3 groups. A superficial lamellar scleral flap with an area of 5x5 mm as for trabeculectomy was surgically prepared. Using an Erbium: YAG laser (2.94 micron), the deep lamella with an area of 3x1.8 mm was removed. Group I was subjected to an energy level of 40-60 m.J, Descemet's membrane was preserved and trabecular meshwork was left intact and no thermal damage on the contiguous structures in all eyes, group II to 60-80 m.J Descemet's membrane was ruptured in 30% (3 eyes), thermal damage was 20% (2 eyes) on superficial structures, while group III to 80-100m.J there was a high risk of rupture of Descemet's membrane 50% (5 eyes), thermal damage was 30%(3 eyes) on superficial structures & 20%(2 eyes) on deep & superficial structures. Eyes were analyzed histologically by electron microscopy to study Descemet's membrane & the trabecular meshwork & the thermal damage on contiguous structures. Eyes with rupture of Descemet's membrane had total energy power of 11.75 J +/- 6.39, average power was 0.58W +/- 0.07 & power density 1155W/cm2 +/- 144, compared to eyes with no rupture 24.23J +/- 11.77 total energy power, 0.46W average power & 916.4W/cm2 +/- 227 power density. Thermal damage changes occurred at total energy power of 10.14 J, average power was 0.59W & power density 1180W/cm², compared to eyes with no rupture 24.17J total energy power, 0.46W average power & 919.1W/cm² power density.

Citation Download Citation

Yehia A. Badr D.D.S., Ibrahim M. Taher M.D., Mostafa M. Bahgat M.D., and Dina F. Ghoneim M.D. "Deep sclerectomy using erbium:YAG laser in pigs eyes", Proc. SPIE 5314, Ophthalmic Technologies XIV, (13 July 2004); https://doi.org/10.1117/12.522751

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
9 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Erbium

YAG lasers

Laser energy

Laser safety

Erbium lasers

Er:YAG lasers

Laser ablation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years