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. 2023 Nov 7;18(4):831–835. doi: 10.1055/s-0043-1775586

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Asian Congress of Neurological Surgeons. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. ( https://creativecommons.org/licenses/by-nc-nd/4.0/ )

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.

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Fig. 1 — Schematic drawing of our hypothesis showing. The red arrows indicate the direction in which the catheter moves by balloon inflation. ( A ) When the balloon is first navigated around the aneurysmal neck and the microcatheter is next navigated into the aneurysm, the microcatheter tends to place outside the balloon. Therefore, the tip of the microcatheter easily escapes from the aneurysmal dome due to balloon inflation. ( B ) If the order of navigating the microcatheter and the balloon is changed, the positional relationship tends to be reversed. Hence, inflating the balloon stabilizes the tip of the microcatheter within the aneurysm.