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Updated: Mar 21, 2026
Real-Time Monitoring of Neurocritical Patients with Diffuse Optical Spectroscopies
Published on: November 19, 2020
Better prognostic value with combined optic nerve sheath diameter and grey-to-white matter ratio on initial brain
Minjung Kathy Chae1, Eunsil Ko1, Jeong Hoon Lee1
1Department of Emergency Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
Aim:
We aimed to evaluate the prognostic value of optic nerve sheath diameter (ONSD) and grey-to-white matter (GWR) either alone or in combination in patients treated with targeted temperature management (TTM) after cardiac arrest (CA).
Methods:
We conducted a retrospective single centre study of post cardiac arrest patients treated with TTM. ONSD and GWR on brain computed tomography (CT) was measured by two emergency physicians. We analysed the prognostic performance and cut offs of GWR and ONSD, singly and in combination in predicting poor neurologic outcome (CPC 3-5).
Results:
Of the 119 patients studied, 74 patients showed poor outcome. The combination of ONSD and GWR significantly (p=0.002) improved prognostic performance (AUROC 0.67, 95% CI: 0.58-0.76, p<0.001) in predicting poor neurologic outcomes rather than each ONSD (AUROC 0.59, 95% CI: 0.50-0.68, p=0.08) or GWR (AUROC 0.65, 95% CI: 0.56-0.74, p=0.002) alone. A combined cut off of 'GWR and ONSD (1.16 and 4.9)' and 'GWR or ONSD (1.13 or 6.5)' improved the sensitivity for predicting poor outcome while maintaining high specificity compared to GWR alone.
Conclusion:
The combination of ONSD and GWR yielded improved prognostic value for predicting poor neurologic outcomes in post cardiac arrest patients treated with TTM.
