We aimed to examine bedside ONSD values measured by ocular ultrasonography in patients presenting to the ED with stroke, and to determine a diagnostic cut-off value for differentiating ischemic from hemorrhagic stroke.
This study was conducted prospectively and observationally in the adult emergency department of a tertiary training and research hospital. Patients older than 18 years who presented to the ED with stroke on the investigator's shift days, who were not followed up or treated by the investigator, and who were diagnosed with cerebrovascular disease (CVD) by radiological imaging (CT/MRI) were included in the study. Patients who were intubated, those who were unwilling to participate, and those in whom mass, aneurysm, metastasis, hydrocephalus, sarcoidosis, ventriculoperitoneal shunt, optic neuritis, or any cause that could lead to cerebral edema or affect the ONSD by raising ICP was identified in their history or on imaging were excluded.
Study Type
OBSERVATIONAL
Enrollment
64
Measurement of the optic nerve sheath diameter using a high-frequency (4-10 MHz) linear probe at 3 mm posterior to the papilla, immediately after the CT/MRI procedure.
Ankara Bilkent City Hospital Emergency Medicine Department
Ankara, Turkey (Türkiye)
Cut-off Value of Optic Nerve Sheath Diameter (ONSD)
Determination of the optimal ONSD cut-off value (in millimeters) to effectively differentiate between ischemic and hemorrhagic stroke subtypes.
Time frame: Evaluated immediately following the initial imaging procedure (CT/MRI) in the emergency department.
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