[Tips for Selecting Balloons or Stents for Cerebral Aneurysms: Effective Use of Each Device]

We introduce typical use cases and the appropriate use of balloon catheters and neck bridge stents for coil embolization of cerebral aneurysm. There are two types of balloon catheters: single-lumen and double-lumen catheters. They are also classified into compliant and super-compliant balloons by softness. Neck bridge stents are classified into two types: open-cell and closed-cell stents. Balloon- and stent-assisted techniques are both useful for wide-neck aneurysms. The complication rates of these methods are similar but the stent-assisted technique requires long-term administration of antiplatelets after the procedure. Both techniques have the challenge that the microcatheter is fixed during coil embolization. The semi-jailing technique, in which the stent is partially deployed during coil insertion, solves this problem. Open-cell stents seem more suitable for this technique because they fit better to the vessel wall even in the curved part. It is important to understand the characteristics of each device for safe and effective treatments.