Can bedside sonographic measurement of optic nerve sheath diameter in the emergency department identify increased intracranial pressure?
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Why is this study important?
The idea of sonographic measurement for the diagnosis of increased increased intracranial pressure (ICP) is not new but nor has it been unequivocally demonstrated as a valid and reliable diagnostic tool.[1] This study further examines the role of sonographic measurement of the ONSD as a noninvasive method, without ionizing radiation, for detecting raised ICP.
Which, if any, threats to validity are most likely to have an impact on the results and how?
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