Reversible Dilation of the Superior Ophthalmic Vein in Intubated Patients

American Journal of Neuroradiology

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Fig 1.
A 75-year-old man presenting to the emergency department as a trauma alert after experiencing a fall. No intracranial hemorrhage or acute intracranial abnormality was found. The patient was intubated for airway protection secondary to aspiration. The right SOV diameter was 7.9 mm and the left SOV diameter was 10 mm on initial head CT (A, arrows). On 2-week follow-up CT following extubation, the SOV diameter significantly decreased bilaterally (B, arrows).
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Fig 2.
SOV diameter during and after intubation for both emergency department trauma and intraoperative cohorts. Both paired boxplots and dotplots are provided. In each cohort, boxplots on the left represent patients while intubated, with boxplots on the right showing SOV values following extubation. Left, right, and mean (average) SOV diameters are shown separately.

Differences in SOV caliber before and after intubation

Cohort (No.)	SOV	Mean (SD)		Mean Difference (99% CI)	P Value
Cohort (No.)	SOV	Intubated	Extubated	Mean Difference (99% CI)	P Value
Intraoperative (45)	Right	3.56 (1.51)	1.82 (0.66)	1.74 (1.31–2.17)	<.001^{^a}
Intraoperative (45)	Left	2.91 (1.41)	1.53 (0.54)	1.36 (0.95–1.79)	<.001
Trauma (70)	Right	2.88 (1.48)	1.86 (1.16)	1.02 (0.74–1.30)	<.001
	Left	2.68 (1.59)	1.78 (1.11)	0.90 (0.5–1.21)	<.001
Control (30)	Right	–	1.88 (0.51)	–	≤.001^{^b}
	Left	–	1.83 (0.49)	–	<.001

↵a Bonferroni-corrected Wilcoxon paired signed rank tests between intubated and extubated states.
↵b Three-way Kruskal-Wallis test between controls and intubated cohorts. Post hoc pair-wise comparisons between controls and the experimental groups were also statistically significant (P < .001). Comparisons with extubated patients were not statistically significant.