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air bubble sign, ball-valve theory, inverted soda bottle effect, Mount Fuji sign, neurosurgical emergency, peaking sign, pneumocephalus, tension pneumocephalus



  1. Vacca, Vincent M. Jr. MSN, RN, CCRN, SCRN, ENLS


Abstract: Pneumocephalus is a pathologic collection of air contained within the intracranial space. Although traumatic head injury accounts for 75% of all cases, pneumocephalus is also common following neurosurgery. Simple, asymptomatic pneumocephalus can often be managed conservatively; however, tension pneumocephalus is a neurosurgical emergency.