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ArticleNeurocritical care2026

Subarachnoid Hemorrhage: Clazosentan vs. Fasudil for Vasospasm Prevention (SAVIOR) Study: Study Protocol for a Prospective, Multicenter, Randomized Trial.

Shinsuke Muraoka, Takashi Izumi, Issei Takeuchi, Masahiro Nishihori, Shunsaku Goto, Eiki Imaoka, Fumiaki Kanamori, Kenji Uda, Yusuke Sakamoto, Kinya Yokoyama and 6 more

Abstract read
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In one paragraph

Article in Neurocritical care, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

16 authors.

Shinsuke MuraokaDepartment of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan. neuro-smuraoka@umin.ac.jp.ORCID http://orcid.org/0000-0003-4225-110X
Takashi IzumiDepartment of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan.
Issei TakeuchiDepartment of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan.
Masahiro NishihoriDepartment of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan.
Shunsaku GotoDepartment of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan.
Eiki ImaokaDepartment of Neurosurgery, Gifu Prefectural Tajimi Hospital, Tajimi, Gifu, Japan.
Fumiaki KanamoriDepartment of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan.
Kenji UdaDepartment of Neurosurgery, Nagoya Ekisaikai Hospital, Nagoya, Aichi, Japan.
Yusuke SakamotoDepartment of Neurosurgery, Aichi Medical University Graduate School of Medicine, Nagakute, Aichi, Japan.
Kinya YokoyamaDepartment of Neurosurgery, Japan Community Health Care Organization Chukyo Hospital, Nagoya, Aichi, Japan.
Masahiko AndoDepartment of Advanced Medicine, Nagoya University Hospital, Nagoya, Japan.
Yachiyo KuwatsukaDepartment of Advanced Medicine, Nagoya University Hospital, Nagoya, Japan.
Kazuki NishidaDepartment of Advanced Medicine, Nagoya University Hospital, Nagoya, Japan.
Basile ChretienDepartment of Advanced Medicine, Nagoya University Hospital, Nagoya, Japan.
Ryuta SaitoDepartment of Neurosurgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan.
SAVIOR Study Collaborators

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Aneurysmal subarachnoid hemorrhage (aSAH) is a devastating condition, with cerebral vasospasm and subsequent delayed cerebral ischemia being key contributors to poor neurological outcomes. In Japan, fasudil is the standard prophylactic agent used to mitigate vasospasm, though its efficacy in improving long-term functional outcomes remains uncertain. Clazosentan, a selective endothelin-A receptor antagonist, has demonstrated potential in reducing vasospasm-related morbidity in phase 3 trials. However, no randomized controlled trial directly comparing the effects of fasudil and clazosentan on functional independence exists in Japan. The primary objective of this study is to determine the superiority of clazosentan over fasudil in enhancing functional outcomes among patients with aSAH. The Subarachnoid Hemorrhage: Clazosentan vs. Fasudil for Vasospasm Prevention (SAVIOR) study is a multicenter, randomized, open-label, parallel-group superiority trial conducted across 21 high-volume stroke centers. Patients with aSAH secured within 48 h of onset will be randomized in a 1:1 ratio to receive either intravenous clazosentan or fasudil. The primary outcome is the proportion of patients achieving a favorable functional outcome (modified Rankin Scale 0-2 at 90 days post-onset). Secondary outcomes include modified Rankin Scale (mRS) score at discharge, incidence of cerebral vasospasm and vasospasm-related delayed cerebral ischemia, and safety profiles, with particular attention to fluid retention-related complications. This trial is the first to directly compare the efficacy and safety of clazosentan vs. fasudil. By selecting the local standard of care as the comparator, the study is designed to generate pragmatic, high-impact evidence that can inform clinical decision-making and potentially reshape treatment guidelines for aSAH management in Japan. It will provide the first high-quality data from a direct comparison of clazosentan and fasudil, in a nimodipine-free population-a clinical question not addressed by previous international trials.

Indexed as

Aneurysmal subarachnoid hemorrhageCerebral vasospasmClazosentanFasudilRandomized controlled trialStudy protocol

Identifiers

What Socratic holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.