Neuroanesthesia & neurocritical care
Preoperative assessment of optic nerve sheath diameter and heart rate variability to predict intraoperative brain condition in patients with supratentorial tumors: a prospective observational study
Authors' conclusion
The changes in ONSD and HRV parameters, with the CT findings can be used as surrogate markers of increased ICP to help predict intraoperative brain condition.
Study context
- Population
- Patients with supratentorial brain tumors undergoing elective surgery, tertiary care centre
- Participants
- 58 patients
- Exposure
- Lax vs tight brain
- Outcome
- Prediction of intraoperative brain relaxation (brain relaxation score after craniotomy) by preoperative HRV parameters and ONSD
Methodological detailssingle-centre
- Single-centre
Main finding
As reported in the abstract
Predictors of intraoperative brain bulge (ROC cut-offs)
Computed tomography (CT) grade cut-off predicting brain bulge
more than 2
Optic nerve sheath diameter (ONSD) cut-off predicting brain bulge
greater than 0.63 cms
LF/HF ratio cut-off predicting brain bulge
more than 1.8
Observational data: associations, not effects.
Original publication
Preoperative assessment of optic nerve sheath diameter and heart rate variability to predict intraoperative brain condition in patients with supratentorial tumors: a prospective observational study. J Clin Monit Comput. Published 9 November 2022. doi:10.
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