Stromal thermal effects induced by nonmechanical (2.94-μm) Erbium: YAG laser corneal trephination

Ashley Behrens, Michael Küchle, Berthold Seite, Achim Langenbucher, Murat M. Kus, Thomas Amann, Ursula Schlötzer-Schrehardt, Carmen Rummelt, Gottfried O H Naumann

Research output: Contribution to journalArticle

Abstract

Objective: To determine stromal thermal changes after erbium (Er):YAG laser corneal trephination with the use of 2 open masks. Methods: Corneal trephination was performed in 89 enucleated pig eyes with an Er:YAG laser (400-microsecond pulse duration), 4 open masks (2 metallic and 2 ceramic) for both donors and recipients, and an automated globe rotation device. Different combinations of laser settings were used: pulse energy, 100, 200, and 400 mJ; repetition rate, 2 and 5 Hz; and spot size, 1.3 and 3.2 min. Thermal effects in corneal stroma and regularity of the cut edges were quantitatively assessed by light microscopy, transmission and scanning electron microscopy. Results: Best regularity and minimal thermal effects of the cut were observed with the use of ceramic masks at 200 mJ, 2 Hz, and 3.2-mm spot size, with middepth thermal changes of 18 ± 2 μm. Effects increased with cut depth and were lower in donor corneas and with the use of ceramic masks (P

Original languageEnglish (US)
Pages (from-to)1342-1348
Number of pages7
JournalArchives of Ophthalmology
Volume116
Issue number10
StatePublished - 1998
Externally publishedYes

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Trephining
Solid-State Lasers
Masks
Ceramics
Hot Temperature
Corneal Stroma
Scanning Transmission Electron Microscopy
Cornea
Microscopy
Lasers
Swine
Light
Equipment and Supplies

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Behrens, A., Küchle, M., Seite, B., Langenbucher, A., Kus, M. M., Amann, T., ... Naumann, G. O. H. (1998). Stromal thermal effects induced by nonmechanical (2.94-μm) Erbium: YAG laser corneal trephination. Archives of Ophthalmology, 116(10), 1342-1348.

Stromal thermal effects induced by nonmechanical (2.94-μm) Erbium : YAG laser corneal trephination. / Behrens, Ashley; Küchle, Michael; Seite, Berthold; Langenbucher, Achim; Kus, Murat M.; Amann, Thomas; Schlötzer-Schrehardt, Ursula; Rummelt, Carmen; Naumann, Gottfried O H.

In: Archives of Ophthalmology, Vol. 116, No. 10, 1998, p. 1342-1348.

Research output: Contribution to journalArticle

Behrens, A, Küchle, M, Seite, B, Langenbucher, A, Kus, MM, Amann, T, Schlötzer-Schrehardt, U, Rummelt, C & Naumann, GOH 1998, 'Stromal thermal effects induced by nonmechanical (2.94-μm) Erbium: YAG laser corneal trephination', Archives of Ophthalmology, vol. 116, no. 10, pp. 1342-1348.
Behrens A, Küchle M, Seite B, Langenbucher A, Kus MM, Amann T et al. Stromal thermal effects induced by nonmechanical (2.94-μm) Erbium: YAG laser corneal trephination. Archives of Ophthalmology. 1998;116(10):1342-1348.
Behrens, Ashley ; Küchle, Michael ; Seite, Berthold ; Langenbucher, Achim ; Kus, Murat M. ; Amann, Thomas ; Schlötzer-Schrehardt, Ursula ; Rummelt, Carmen ; Naumann, Gottfried O H. / Stromal thermal effects induced by nonmechanical (2.94-μm) Erbium : YAG laser corneal trephination. In: Archives of Ophthalmology. 1998 ; Vol. 116, No. 10. pp. 1342-1348.
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AU - Kus, Murat M.

AU - Amann, Thomas

AU - Schlötzer-Schrehardt, Ursula

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