• J Neuroimaging · Sep 2022

    Review

    Quality assessment of optic nerve sheath diameter ultrasonography: Scoping literature review and Delphi protocol.

    • Mohammad I Hirzallah, Piergiorgio Lochner, Muhammad Ubaid Hafeez, Andrew G Lee, Christos Krogias, Deepa Dongarwar, Ramneek Manchanda, Lara Ouellette, Nicholas D Hartman, Michael Ertl, Felix Schlachetzki, and Chiara Robba.
    • Department of Neurology, Baylor College of Medicine, Houston, Texas, USA.
    • J Neuroimaging. 2022 Sep 1; 32 (5): 808824808-824.

    Background And PurposeThe optic nerve is surrounded by the extension of meningeal coverings of the brain. When the pressure in the cerebrospinal fluid increases, it causes a distention of the optic nerve sheath diameter (ONSD), which allows the use of this measurement by ultrasonography (US) as a noninvasive surrogate of elevated intracranial pressure. However, ONSD measurements in the literature have exhibited significant heterogeneity, suggesting a need for consensus on ONSD image acquisition and measurement. We aim to establish a consensus for an ONSD US Quality Criteria Checklist (ONSD US QCC).MethodsA scoping systematic review of published ultrasound ONSD imaging and measurement criteria was performed to guide the development of a preliminary ONSD US QCC that will undergo a modified Delphi study to reach expert consensus on ONSD quality criteria. The protocol of this modified Delphi study is presented in this manuscript.ResultsA total of 357 ultrasound studies were included in the review. Quality criteria were evaluated under five categories: probe selection, safety, positioning, image acquisition, and measurement.ConclusionsThis review and Delphi protocol aim to establish ONSD US QCC. A broad consensus from this process may reduce the variability of ONSD measurements in future studies, which would ultimately translate into improved ONSD clinical applications. This protocol was reviewed and endorsed by the German Society of Ultrasound in Medicine.© 2022 American Society of Neuroimaging.

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