OBJECTIVES/HYPOTHESIS: Scuba diving may cause severe @entity393 and vertigo due to @entity389 and @entity5663 . These may be difficult to differentiate clinically. @entity5663 requires costly and potentially dangerous hyperbaric therapy, whereas such treatment may worsen @entity11283 . The objective of this study was to assess the potential utility of magnetic resonance imaging to identify and distinguish blood from air in the inner ear, manifestations of @entity11283 and @entity5663 , using a @entity840 model. STUDY DESIGN: Prospective animal trial. METHODS: Magnetic resonance of the head was performed at 3 Tesla, pre- and postinjection of 2, 4, or 10  L of air or blood through the round window into the perilymph. With this model, 2  L has been shown to cause @entity393 . Images were reviewed by a neuroradiologist blinded to the treatment. RESULTS: All 14 normal ears, five of seven blood- and five of seven air-injected ears, were correctly interpreted. Two blood- and one air-injected ear were interpreted as indeterminate. One air-injected ear was incorrectly interpreted as blood. CONCLUSIONS: Magnetic resonance reliably distinguishes small volumes of air and blood in the @entity840 inner ear. Magnetic resonance should be evaluated for its utility in the diagnosis of @entity389 and @entity5663 in scuba divers. LEVEL OF EVIDENCE: NA Laryngoscope, 126:2106-2109, 2016.

Magnetic resonance imaging in a XXXX model of @entity389 and @entity11283 .

@entity840 :: ('10141', 'Species') :: ['guinea pig'] @entity5663 :: ('MESH:D003665', 'Disease') :: ['Decompression sickness', 'decompression sickness'] @entity389 :: ('MESH:D007759', 'Disease') :: ['inner ear barotrauma'] @entity393 :: ('MESH:D034381', 'Disease') :: ['hearing loss'] @entity11283 :: ('MESH:D001469', 'Disease') :: ['barotrauma']
@entity840 :: (10141,Species) :: ['guinea pig']
