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要約 目的:摘出豚眼にチン小帯断裂を施したモデルを作製し,水晶体吸引時における水晶体囊形状を検討した。
対象と方法:摘出豚眼10例に対しカプセルジアテルミーを用いて虹彩を根部で切開して除去した後,部分的なチン小帯断裂を作製し,断裂部方向の水晶体を吸引した。断裂の範囲は68.1〜117.7°,平均87.9°であった。
結果:吸引中における突起部の内側面積に対する囊に被われずに露出した面積の割合は,断裂範囲が90°未満では7.2%,90°以上では12.8%であり,90°以上で有意に拡大した(p<0.0001)。
総論:本モデルは,水晶体囊の形状変化を定量化することができ,囊支持器具の効果の検討に応用できる可能性があり,有用と考えられた。
Abstract Purpose:To report changes in the shape of lens capsule during phacoemulsification in pig eyes.
Method:Ten pig eyes were used in this experiment. After removal of the iris, partial zonular dehiscence was made using diathermy. The lens cortex was aspirated around the equator along the zonular dehiscence. The zonular dehiscence ranged from 68.1 to 117.7 degrees and averaged 87.9 degrees.
Results:Area of exposed anterior lens capsule was 7.2% when the dehiscence was less than 90 degrees. It was 12.8% when the dehiscence was more than 90 degrees. The difference was significant(p<0.0001).
Conclusion:The present experimental model promises to enable quantification of changes in the shape of lens capsule during phacoemulsification in human eyes. It may also contribute to the design of capsular holder during surgery.
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