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Updated: Jan 16, 2026

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Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging
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Microcatheter Shape Adjustment during Coil Embolization with the Leonis Mova Steerable Microcatheter
Yusuke Tomita1, Nobuyuki Hirotsune1, Ryohei Tsuchie1
1Department of Neurosurgery and Neuroendovascular Surgery, Hiroshima City Hiroshima Citizens Hospital, Hiroshima, Hiroshima, Japan.
Journal of Neuroendovascular Therapy
|October 2, 2025
Summary
The Leonis Mova microcatheter effectively treated a complex brain aneurysm. This steerable catheter enabled precise coil embolization of multiple blebs in a tortuous artery, leading to successful patient recovery.
Area of Science:
- Neurosurgery
- Interventional Neuroradiology
- Vascular Surgery
Background:
- Aneurysmal subarachnoid hemorrhage presents a significant neurological emergency.
- Microcatheters are crucial tools for minimally invasive treatment of cerebral aneurysms.
- The Leonis Mova is a steerable microcatheter designed for precise navigation.
Purpose of the Study:
- To report a case of aneurysmal subarachnoid hemorrhage treated with coil embolization.
- To evaluate the utility of the Leonis Mova microcatheter in a complex aneurysm case.
Main Methods:
- A 53-year-old female patient with a left internal carotid artery-posterior communicating artery aneurysm underwent coil embolization.
- The Leonis Mova Selective microcatheter was used in conjunction with the Excelsior SL-10 microcatheter via a double-catheter technique.
- The steerability of the Leonis Mova was utilized to meticulously fill aneurysm blebs.
Main Results:
- Successful coil embolization of a 7.5-mm aneurysm with multiple blebs was achieved.
- Almost complete obliteration of the aneurysm was obtained.
- The patient recovered well and was discharged after treatment for vasospasm.
Conclusions:
- The Leonis Mova microcatheter demonstrated utility in treating complex aneurysms with multiple blebs.
- Its steerable tip facilitates precise coil placement in challenging anatomies.
- This case highlights the potential of the Leonis Mova in endovascular treatment of cerebral aneurysms.

