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Inicio Archivos de la Sociedad Española de Oftalmología (English Edition) Effect of mitomycin C on corneal regrowth after laser-assisted sub-epithelial ke...
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Vol. 86. Issue 7.
Pages 213-217 (July 2011)
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Vol. 86. Issue 7.
Pages 213-217 (July 2011)
Original article
Effect of mitomycin C on corneal regrowth after laser-assisted sub-epithelial keratectomy (LASEK)
Efecto de la mitomicina C en el engrosamiento corneal tras queratectomía subepitelial con láser excimer (LASEK)
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L. De Benito-Llopis
Corresponding author
lbenito@vissum.com

Corresponding author.
, M.A. Teus, P. Drake-Casanova
Vissum, Hospital Oftalmológico de Madrid, Spain
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Tables (2)
Table 1. Pre-op data of the 64 eyes included in the study.
Table 2. Central corneal thickness (CCT) in the 64 eyes treated with surface ablation for correcting myopic defect.
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Abstract
Purpose

To study the effect of mitomycin C (MMC) on the corneal regrowth after laser-assisted sub-epithelial keratectomy (LASEK).

Methods

We performed a prospective, controlled, observer-masked study of 64 consecutive eyes scheduled to undergo LASEK to correct their myopia. The patients were divided into two age-matched groups. With Group 1 including 32 eyes in which the ablation depth was ≤50μm and received no MMC. Group 2 consisted of 32 eyes in which the ablation depth exceeded 50μm and were treated with intra-operative 0.02% MMC for 30s over the ablated zone. A masked observer measured the central corneal thickness (CCT) 1 and 3 months after surgery. We compared the change in CCT between both groups up to 3 months after surgery.

Results

The mean patient age was 31.5 years (SD 4.6) and 31.6 years (SD 8.7) in groups 1 and 2, respectively (p=0.9). Group 1 showed a mean CCT of 444.0 (SD 41.3) μm one month after surgery and 450.3 (SD 43.5) μm three months after surgery (p=0.04). CCT values in group 2 were 399.7 (SD 31.2)μm and 407.9 (SD 32.6)μm for one and three months after surgery, respectively (p=0.006). The difference in the CCT increases between both groups was not statistically significant (p=0.6).

Conclusions

A single intraoperative application of 0.02% MMC for 30seconds did not seem to cause a substantial change in the post-surgical corneal thickening expected after LASEK.

Keywords:
LASEK
Surface ablation
Mitomycin C
MMC
Epithelial hyperplasia
Resumen
Objetivo

Estudiar el efecto de la mitomicina C (MMC) en el engrosamiento corneal tras keratectomía subepitelial con láser excimer (LASEK).

Métodos

Realizamos un estudio prospectivo, controlado, enmascarado de 64 ojos consecutivos operados con LASEK para corregir su miopía. Separamos dos grupos empatados por edad. 32 ojos en los que la profundidad de ablación era ≤50 micras (μm) fueron incluidos en el grupo 1 y no recibieron MMC. 32 ojos en los que la profundidad de ablación era >50μm se incluyeron en el grupo 2 y recibieron MMC al 0,02% durante 30seg sobre el lecho ablacionado. Un observador enmascarado midió el grosor corneal central (GCC) al mes y tres meses tras la cirugía. Comparamos el cambio en el GCC postoperatorio entre los dos grupos.

Resultados

La media de edad era de 31,5 (DE 4,6) años y 31,6 (DE 8,7) años en los grupos 1 y 2 respectivamente (p=0,9). En el grupo 1, la media del GCC era 444,0 (DE 41,3) μm al mes y 450,3 (DE 43,5) μm a los tres meses (p=0,04). El GCC en el grupo 2 era 399,7 (DE 31,2) μm al mes y 407,9 (DE 32,6) μm tres meses tras la cirugía (p=0,006). La diferencia entre los incrementos de GCC entre los dos grupos no fue estadísticamente significativa (p=0,6).

Conclusiones

Una única aplicación intraoperatoria de MMC al 0,02% durante 30 segundos no parece causar un cambio sustancial en el incremento del grosor corneal postoperatorio observado tras LASEK.

Palabras clave:
LASEK
Ablación de superficie
Mitomicina C
MMC
Hiperplasia epitelial

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