Sickle-cell trait (HbAS) is present in approximately 8% of American black recruits and 0.05% of non-black recruits. HbAS has caused major concern in the aviation medical community as a possible causal and latent health-risk factor for aircrewmembers. Concern stems from reports purporting to show in HbAS individuals a causal relation between altitude-induced hypoxia and splenic infarction and between physical exertion at altitude and sudden death. These concerns have been offset ...
Spontaneous pneumothorax is a common clinical entity with a reported incidence of 0.005 to 0.05% that occurs most often in healthy young adult (50% between 20 to 29 years of age) males (85%) as a result of ruptured subpleural blebs. A single episode of spontaneous pneumothorax is not usually considered a grave therapeutic problem (mortality
Eighteen US Army initial flight applicants and trained aircrew were evaluated for the electrocardiographic diagnosis of left anterior hemiblock (LAH). This diagnosis was sustained in 50% by the addition of vectorcardiographic criteria. With computer processing and calculation of delay of the intrinsicoid deflection (ID) of the high lateral left ventricular activation time, the diagnosis was sustained in 50% of those records available. Review of the etiology, histopathology, and prognosis indicates ...
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