多孔質樹脂高分子ポリエチレンを用いた内視鏡手術用ロータリーダイセクター

Porous rotary dissector made of polyethylene for endoscopic surgery

◆要旨：チェリーダイセクターの先端は，綿を球形に形成したもので，血液で先端の綿が湿ってしまうと，肺を適切に保持することができない．先端を正多角形にすることで摩擦が増えることを着想し，摩擦係数の高い高分子ポリエチレンの多孔質樹脂を採用した．正六角形の形状で摩擦係数を調整した多孔質樹脂の先端は，肺を保持するうえで十分なグリップ力で，ロータリーダイセクターとして医療機器に承認を得た．その後，産学連携（経済産業省課題解決事業）を通して，5mm径のサイズも開発した．先端の多孔質樹脂の形状や量の変更により，多彩な外科医のニーズに応えることが可能である．産学連携での医療機器開発には，知的財産権の取得は必須であった．

　The cherry dissector may not be able to properly hold the position of the lungs if the tip cotton is wet with blood. I thought that the edges would work well by making the tip a regular polygon, and acquired intellectual property rights. In addition, through industry-university collaboration, with the support of the Ministry of Economy, Trade and Industry issue problem solving project, the small diameter 5 mm size dissector was also approved as a medical device. As a material having a high friction coefficient, a porous resin of high molecular polyethylene was adopted. The tip of the porous resin was adjusted in order to generate sufficient grip force for surgical procedure around soft tissues. By changing the porous amount of the tip and the material kinds of the resin, there are possibilities for various development adapted to the needs of many surgeons. Appropriate acquisition and handling of intellectual property rights was indispensable for medical device development in industry-university collaboration.