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Rapid identification and treatment of elevated intracranial pressure (ICP) decreases morbidity and mortality. Invasive intracranial monitoring devices are the current standard for identifying increased ICP. Based on the premise that intraocular pressure (IOP) is affected by ICP, these authors hypothesized that a noninvasive handheld tonometer could be used to identify elevated ICP. In a pilot study among a convenience sample of 27 adult intensive-care-unit patients who were undergoing invasive ICP monitoring, researchers simultaneously measured IOP with a tonometer and recorded ICP for each patient. Indications for invasive ICP monitoring were hemorrhage, stroke, tumor, trauma, and shunt malformation.
A priori, the authors defined elevated I…