Introduction
Awake craniotomy (AC) is a technique that balances maximum resection and minimal postoperative deficits in patients with intracranial pathology. To aid in comparability of functional outcomes after awake surgery, this study investigated its international practice and aimed to define categories of postoperative deficits.
Methods
A survey was distributed via neurosurgical networks in Europe (European Association of Neurosurgical Societies, EANS), the Netherlands (Nederlandse Vereniging voor Neurochirurgie, NVVN), Belgium (Belgian Society of Neurosurgery, BSN), and the United States (Congress of Neurological Surgeons, CNS) between April 2022 and April 2023. Questions involved decision-making, including patient selection, anxiety assessment, and termination of resection. Interpretation of “major” and “minor” deficits, respectively labelled “level I” and “level II”, was assessed.
Results
395 neurosurgeons from 46 countries completed the survey. Significant heterogeneity was found on domains of indications, anxiety assessment, seizure management, and termination of resection. Moreover, interpretation of “major” deficits mainly included language and motor impairments. Analysis across deficit categories showed significant overlap in the domains of executive function, social cognition, and vision. Secondly, “minor” deficits and “minor cognitive” deficits showed vast overlap.
Discussion
This survey demonstrates high variability between neurosurgeons in awake craniotomy practice on multiple domains, inviting international efforts to reach consensus regarding postoperative deficits. The proposed categories of “level I” and “level II” deficits may aid in the comparability of future studies regarding awake craniotomy. It allows for systematic comparison of functional outcomes of AC between institutions and surgeons which may benefit the optimization of international guidelines for awake surgery.