マイクロカテーテルの取り扱い説明書

Microcatheter User's Manual

Point

・コイル塞栓術で頻用するマイクロカテーテルの概要，構造，スペックについて詳細を解説した．

・カテーテル先端のマニュアルシェイピングについて実験を行い，本邦で使用可能な各種マイクロカテーテルの特性を比較した．

　Although flow diverter stents are gaining prominence in unruptured aneurysms, intrasaccular coil embolization remains the fundamental strategy for treating ruptured cases. In this context, precise selection and manipulation of microcatheters (MCs) are pivotal determinants of procedural success. This article provides a comprehensive overview of the mechanical properties of MCs—particularly the balance between proximal stiffness and distal flexibility—their specifications, and selection criteria for devices widely available in Japan, with a specific focus on manual shaping techniques. We present experimental data comparing the shape-memory capabilities and shape-retention durability of various commercially available MCs following heat-gun and steam processing. Furthermore, we introduce practical “spiral shaping” methods tailored for paraclinoid aneurysms with complex geometric axis misalignments, and discuss decision-making strategies for intraoperative MC repositioning to achieve optimal coil distribution. A thorough understanding of MC mechanics and mastery of appropriate shaping techniques are vital for neurointerventionists to ensure safe and effective treatment outcomes.