新しい眼科手術練習用モデル眼の試作

New models for training ocular surgery

要約　目的：手軽に眼科手術の練習ができるモデル眼を作製すること。今回は，①模擬水晶体前囊と，②硝子体手術に関連した手技の練習用模擬眼を試作した。

対象と方法：①下敷きをアルミホイルで覆い，テンプレート定規（丸型）を乗せ固定した。定規の丸い穴の下にあるアルミホイルを模擬前囊とした。②市販の円柱形のクリアケース（内径と高さが約25mm）のフタを取り，食品包装用ラップフィルムで開口部を覆った。その中央部（直径12mmの円）は避けて，周辺部にビニールテープを貼って補強し，模擬強膜とした。これらの模擬眼で，眼科手術関連の練習が可能かを試みた。

結果：2種類のモデル眼は短時間で作れた。作製した模擬眼で，連続前囊切開や硝子体注射や硝子体手術の3ポート作製の練習が可能であった。

結論：細部にこだわらない本模擬眼は，入手が容易な材料で簡単に作製できた。特定の手術手技ではあるが，低予算で手軽に練習可能であった。

Abstract　Purpose：To describe simple training methods for ophthalmic surgery easily. We developed two different types of model eye. One is a model eye for the practice of continuous curvilinear capsulorhexis（CCC）, and another is an artificial eye for vitreous surgery.

Materials and methods：Mock anterior lens capsule is made of a template ruler（round type）, a plastic sheet and aluminum foil. The template ruler is put on the sheet covered with aluminum foil. A simulated anterior capsule is aluminum foil under the circle（12 mm in diameter）of template ruler. Another model eye is created with a small cylindrical case（25 mm in diameter and height）. Its opening is covered with food packaging wrap. Then, vinyl tape, which had a central circler opening approximately 12.0 mm in diameter, is laid on the wrapping. Simulated cornea is the central circler food packaging wrap. Mock sclera is made of vinyl tape. These models are used to practise some of eye surgery.

Results：Both training models were produced within a few minutes. CCC could be practised on mock anterior capsule with a bent 27-gauge needle. Sclerotomy sites and intraocular injection could be performed in the simulated sclera of vinyl tape.

Conclusion：These artificial eyes could be created shortly with readily available materials. These models can offer practice and repetition for beginner surgeons to learn the specific surgical procedures.