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¹Ì´Ï°ø¸··»Áî¿¡¼­ ¹Ýº¹ÀûÀÎ »êÈ­ ¿¡Æ¿·» ¸ê±Õ ÀüÈÄ ·»Áî ôµµµéÀÇ º¯È­ ¿©ºÎ ºÐ¼® Changes in Mini-scleral Lens Parameters after Repetitive Ethylene Oxide Sterilization

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¹è¼±ÇÏ, Àü¿¬¼÷, ±è°æ¿ì,
¼Ò¼Ó »ó¼¼Á¤º¸
¹è¼±ÇÏ ( Bae Seon-Ha ) 
Chung-Ang University College of Medicine Chung-Ang University Hospital Department of Ophthalmology

Àü¿¬¼÷ ( Chun Yeoun-Sook ) 
Chung-Ang University College of Medicine Chung-Ang University Hospital Department of Ophthalmology
±è°æ¿ì ( Kim Kyoung-Woo ) 
Chung-Ang University College of Medicine Chung-Ang University Hospital Department of Ophthalmology

Abstract

¸ñÀû: ½ÃÇè Âø¿ë ¹Ì´Ï°ø¸··»ÁîÀÇ À§»ý °ü¸® ¸ñÀûÀ¸·Î ethylene oxide (EO) ¸ê±ÕÀÇ Àû¿ë °¡´É¼ºÀ» È®ÀÎÇϱâ À§ÇØ ¹Ýº¹ÀûÀÎ EO ¸ê±Õ¿¡ ÀÇÇÑ ·»Áî ±âº» ôµµµéÀÇ º¯È­ ¿©ºÎ¸¦ ºÐ¼®ÇÏ°íÀÚ ÇÏ¿´´Ù.

´ë»ó°ú ¹æ¹ý: ¹Ì´Ï°ø¸··»Áî(Onefit A; Biumtec, Seoul, Korea)ÀÇ ±âº»Çü°ú oblateÇü ÃÑ 67°³¸¦ ´ë»óÀ¸·Î EO ¸ê±Õ Àü, 2ÁÖ °£°ÝÀÇ 3Â÷·ÊÀÇ EO ¸ê±Õ ÈÄÀÇ °¢ ½ÃÁ¡¿¡¼­ ±âº»¸¸°î¹Ý°æ, ·»Áî µµ¼ö, Á߽ɷ»Áî µÎ²², Àüü ·»Áî Á÷°æÀÇ 4°¡Áö ôµµµéÀ» ÃøÁ¤ÇÏ¿´´Ù. ÃÑ 15½Ã°£ µ¿¾ÈÀÇ EO ¸ê±Õ °úÁ¤ Áß ÇÙ½É ´Ü°èÀÎ ³ëÃâ ¸ê±Õ ´Ü°è¿¡¼­´Â ¾Ð·Â 1.5 bar, ¿Âµµ 56¡ÆC¿¡¼­ ÃÑ 180ºÐ°£ EO È¥ÇÕ °¡½º¿¡ ·»ÁîµéÀÌ ³ëÃâµÇ¾ú´Ù.

°á°ú: ±âº»Çü ¹Ì´Ï°ø¸··»ÁîÀÇ EO ¸ê±Õ Àü ´ëºñ ¸ê±Õ ÈÄ ±âº»¸¸°î¹Ý°æÀÇ º¯È­°ªÀº 1Â÷, 2Â÷, 3Â÷ EO ¸ê±Õ ÈÄ °¢°¢ -0.011 ¡¾ 0.004 mm, -0.024 ¡¾ 0.005 mm, -0.021 ¡¾ 0.005 mm·Î ¸ðµÎ Åë°èÀûÀ¸·Î À¯ÀÇÇÏ¿´´Ù. ·»Áî µµ¼ö, Á߽ɷ»Áî µÎ²² ¹× Àüü ·»Áî Á÷°æÀº Àüü ¹Ì´Ï°ø¸··»Áî¿¡¼­ ¸ê±Õ ÀüÈÄ Â÷ÀÌ°¡ ¾ø¾ú´Ù. EO ¸ê±Õ Àü ·»Áî ôµµµéÀÇ ¼öÄ¡¿¡ µû¸¥ EO ¸ê±Õ ÈÄ Ã´µµ º¯È­°ª °£¿¡´Â ´ëüÀûÀ¸·Î À¯ÀÇÇÑ »ó°ü°ü°è¸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù.

°á·Ð: ¹Ì´Ï°ø¸··»ÁîÀÇ ¹Ýº¹ÀûÀÎ EO ¸ê±ÕÀº ·»Áî µµ¼ö, Á߽ɷ»Áî µÎ²² ¹× Àüü ·»Áî Á÷°æÀÇ º¯È­¸¦ À¯¹ßÇÏÁö ¾ÊÀ¸³ª ±âº»¸¸°î¹Ý°æ¿¡ ÇÑÇØ À¯ÀÇÇÑ °¨¼Ò¸¦ ÃÊ·¡Çϱ⠶§¹®¿¡ Åë»óÀûÀÎ ½ÃÇè ·»Áî °ü¸® ¹æ¹ýÀ¸·Î »ç¿ëÇϱ⿡´Â ¹«¸®°¡ ÀÖ°Ú´Ù.

Purpose: We analyzed changes in mini-scleral lens parameters after repetitive ethylene oxide (EO) sterilization.

Methods: We measured the base curve radius (BCR), the optical power, the central lens thickness (CLT), and the overall lens diameter (OLD) of 67 basic, oblate-type mini-scleral lenses (Onefit A; BIUMTEC, Seoul, Korea) before and after three repeats of EO sterilization at 2-week intervals. The sterilization process (15 hours in duration) included a core step featuring exposure to gaseous EO for 180 minutes at 1.5 bar and 56¡ÆC.

Results: The BCR changes in the basic type of mini-scleral lens after EO sterilization were -0.011 ¡¾ 0.004 mm, -0.024 ¡¾ 0.005 mm, and -0.021 ¡¾ 0.005 mm for the first, second, and third sterilizations, respectively; all changes were significant. None of optical power, CLT, or OLD were affected by EO sterilization. We found no significant correlation between any baseline value and the change thereof after sterilization.

Conclusions: Repeated EO sterilization of mini-scleral lenses did not change the optical power, CLT, or OLD, but significantly reduced the BCR. EO should not be used to sterilize mini-scleral lenses.

Å°¿öµå

Base curve radius; Ethylene oxide; Mini-scleral lens; Sterilization

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