Summary of the 2025 AANN Guidelines for Aneurysmal Subarachnoid Hemorrhage: An Update to the 2018 Guidelines

BACKGROUND: The American Association of Neuroscience Nurses (AANN) has published Clinical Practice Guidelines (CPGs) and evidence-based clinical reviews to help guide nursing practice for more than 25 years. This is a summary of findings of the 2025 AANN aneurysmal subarachnoid hemorrhage (aSAH) CPG. METHODS: Population, intervention, comparison, outcome (PICO) questions were formulated based on membership feedback. Systematic literature searches were performed for each PICO question. Literature between January 1, 2013, and December 31, 2022, and seminal research were synthesized to inform practice recommendations. Critical evaluation of the evidence is detailed in the AANN CPG Methods paper. RESULTS: The literature search yielded 5217 publications; 190 were included after review and backward referencing. Quality evidence was low and scarce for 5 out of 9 PICO search topics. CONCLUSIONS: Despite significant morbidity, mortality, and incidence, there remain numerous research opportunities in aSAH nursing care. This paper provides summary recommendations for nursing care of the aSAH population. It also identifies gaps in the evidence as areas for future research.