Economy class syndrome: rheology, fluid balance, and lower leg edema during a simulated 12-hour long distance flight.

摘要: In order to study pathological changes that might lead deep vein thrombosis and pulmonary embolism in long-distance air travel passengers, 12 healthy volunteers were investigated during 4 simulated 12-h flights (day night). The influence of repeated leg exercise was compared with constant sitting. Plasma viscosity, hematocrit, albumin, fluid balance, lower swelling measured. Rheological studies showed only circadian rhythm alterations. An average 1150 ml retained, which correlated an increase body weight. volume significant, but not pathological. Periodic exercising no measurable preventive effects. These human are within physiological variations sufficient provide a definitive cause venous passengers. They do, however, suggest alterations produced by could intensify the risk developing passengers predisposing factors.