Point-of-care ultrasound of optic nerve sheath diameter to detect elevated intracranial pressure : Ultrasound in the eye of the beholder ?

Raised intracranial pressure (ICP) is a frequent complication in neurocritically-ill patients. Current diagnostic methods are invasive and have ample drawbacks. Ultrasound of ONSD can be an alternative modality to diagnose and monitor a raised ICP. A thorough search in PubMed/EMBASE was applied to find relevant articles. Two reviewers independently evaluated the relevant articles and extracted the data. The optimal cutoff value of ONSD to detect a raised ICP ranged from 4.7-5.7 mm with corresponding sensitivity and specificity rates ranging from 70%-100% and 31.9%-100%, respectively.