Neuroanesthesia & neurocritical care
Comparison of intraoperative intraocular pressure using different head fixation devices in prone spinal surgery
Authors' conclusion
No differences in intraoperative IOP according to the head fixation device were observed.
Study context
- Population
- Healthy adults (aged 49–78 years), ASA I/II, undergoing prone spinal surgery, 2016–2018
- Exposure
- Horseshoe headrest vs pinned head-holder in prone spinal surgery
- Outcome
- Intraoperative IOP
Main finding
As reported in the abstract
- Intraocular pressure (IOP) similar in both groups after 1 h and 2 h prone; highest at suture closure
- No significant IOP difference between groups at all time points
- Pin group took longer to elevate IOP after prone positioning and recover IOP after supine positioning than Hs group
Observational data: associations, not effects.
Further findings
Rate of IOP increase with operative time (linear mixed model)
- High rate of IOP elevation up to 1 h prone, decreasing thereafter; no significant difference between groups at any time point
Operative time and prone duration
- Significantly greater in the Pin group
Risk factors for increasing IOP in prone position
- None identified
Original publication
Comparison of intraoperative intraocular pressure using different head fixation devices in prone spinal surgery. J Clin Anesth. Published 14 March 2025. doi:10.
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