Evaluation Of Color Doppler Ultrasound In Variation In Renal Hemodynamic Indexes Of Exercise-induced Proteinuria

Part one Ultrasonic characteristics of human renal hemodynamics during exerciseObjective To study the variation in human renal hemodynamics during exercise.Methods At-10℃-0℃ outdoors, 216 soldiers who took part in 5 km cross-country training(finishing in 30mins) as experimental group and 60 soldiers under calm state as the controls were selected in this study. In each group,hemodynamics parameters including peak systolic velocity(PSV), end diastolic velocity(EDV), resistance(RI), pulsatility(PI)of subjects in two groups were measured using color Doppler ultrasound. The renal size(1ength, width and thickness) were measured by two-dimensional ultrasound.Results The values of PSV, RI and PI from the renal main artery, the values of PSV, RI and PI from the renal segmental arteries and the values of PSV, EDV and RI and PI from the renal interlobar arteries were all significantly lower in experimental group compared with controls. However, the sizes of the kidneys were not changed.Conclusion The changes of the hemodynamic parameters of renal arteries can be monitored by ultrasonographic examinations, which were useful for the evaluation of renal damage during exercise.Part two Observation on renal hemodynamic indexes of proteinuria after exercise using color Doppler ultrasonographyObjective To study the variation in renal hemodynamic indexes of exercise-induced proteinuria under the low temperature condition.Methods Seven hundred fresh soldiers took part in 5 km cross-country training under-10℃-0℃. Urinary protein and cytology were analyzed by flow cytometry and automated dipstick analysis after exercise. Soldiers with proteinuria after exercise were selected as experimental group and 157 soldiers with non- proteinuria were randomly selected as control group. In each group,hemodynamics parameters(PVS, EDV, RI, PI) of subjects in two groups were measured with color Doppler ultrasound. The renal size(length, width and thickness) were measured by two-dimensional ultrasound.Results Subjects with proteinuria were 49 and the incidence of post-exercise proteinuria was7%. The values of EDV from the renal main artery and the renal interlobar arteries were all significantly lower in experimental group compared with the controls. The values of RI and PI from the renal main artery and the renal interlobar arteries in experimental group were all significantly higher than those of the controls. However, the size of the kidneys was not changed between groups.Conclusion The changes of the hemodynamic parameters of renal arteries can be monitored by ultrasonographic examinations, which is useful for the evaluation of renal damage during exercise.