Negative Acceleration Syndrome (Hydrostatic Pressure Syndrome; Supersonic Bailout Syndrome)
General: At rapid deceleration, blood volume is shifted to the brain an 858j92i d face of the individual due to rapid elevation of intravascular blood pressure; the abrupt rise in hydrostatic pressure simultaneous with the decelerative force results in the signs of cerebral concussion, confusion, retrograde amnesia, and circulatory shock.
Ocular: Periorbital edema; ecchymosis of lids; transient visual loss; subconjunctival hemorrhages; retinal hemorrhages and exudates; retinal arteriolar spasm.
Clinical: Mental confusion; shock; possible perforation of internal organs.
Geeraets WJ. Ocular Syndromes, 3rd ed. Philadelphia: Lea & Febiger. 1976.
Lyle DJ, et al. Ophthalmologic hydrostatic pressure syndrome. Am J Ophthalmol 1957; 44:652.
Stokes WH. Unusual retinal vascular changes in traumatic injury to the chest. Arch Ophthalmol 1932; 7:101.
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