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Utilisation of retinal vein photoplethysmography to measure intracranial pressure

William H Morgan1, Ying Jo Khoo2, Allan G Kermode3,4

  • 1Lions Eye Institute, Centre for Ophthalmology and Visual Science, University of Western Australia, Crawley, Western Australia, Australia billmorgan@lei.org.au.

Journal of Neurology, Neurosurgery, and Psychiatry
|August 1, 2020
PubMed
Abstract

No abstract available in PubMed .

Keywords:
benign intracran hypneuroophthalmology

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Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component expands, CSF and venous blood...