Relationship between 24 hour movement behavior and physical fitness among pupils / 中国学校卫生

Objective@#To examine the relationship between 24 hour movement behavior and physical fitness of pupils by using compositional analyses, so as to provide a theoretical basis for physical activity promotion and physical fitness improvement.@*Methods@#By random cluster sampling method, 120 students of grade 4 and 5 from the Second Experimental Primary School of Yingze District of Taiyuan were selected. Physical fitness was evaluated by the indicators of the Protocol of National Physical Training Standard and 20 meter shuttle run. The movement behavior was measured by accelerometer. The relationship between each behavior and physical fitness was analysed by component multiple linear regression, and the effect of replacement of components on physical fitness was discussed.@*Results@#Girls 1minute situps were lower than boys（24.79±7.77，28.21±6.52），and sitting forward flexion was higher than boys[9.00（5.00，14.00），5.20（1.00，9.75）cm]（ t/Z =2.60，-3.15， P ＜0.05）. Boys showed higher light physical activity(LPA), moderate to vigorous physical activity(MVPA) and lower sedentary behavior(SB), while girls showed lower LPA, MVPA and higher SB. MVPA was positively correlated with the performance of 30 second rope skipping and 20 meter shuttle run ( β= 13.19, 7.90, P <0.05). Sleep(SLP), SB, and LPA were not significantly correlated with physical fitness. After re allocating 10 min MVPA to SB and SLP，the performance of 30 second rope skipping and 20 meter shuttle run increased by 2.25，2.28 and 1.28 ,1.34 times，respectively，while significantly decreased after reverse reallocation ( P <0.05). MVPA replaced LPA，the 20 meter shuttle run performance increased 1.46 times，while decreased significantly in reverses ( P <0.05).@*Conclusion@#MVPA is positively correlated with the speed and endurance of pupils. There are gender differences in movement behavior patterns and physical fitness. Children, especially girls, should be encouraged to raise exercise awareness and increase PA, especially MVPA.

Prenatal ultrasound diagnosis of fetal choledochal cysts / 中华全科医师杂志

Objective To assess the application of ultrasonography in prenatal diagnosis of fetal choledochal cysts.Methods The clinical data of 25 fetuses,who were diagnosed as fetal choledocho cysts using ultrasonography and followed up,were retrospectively analyzed.Results Among 25 cases,24 cases were confirmed as congenital choledochal cysts after normal delivery or abortion,and 1 case of liver cyst was misdiagnosed.The 24 cases' prenatal ultrasound showed liver cystic space occupying wihich was connected to intrahepatic bile duct or gallbladder.The cysts wall was thin,and the colour Doppler flow imaging CDFI showed that blood vessels circled around the cyst.In 24 fetuses with prenatal choledochal cysts,21 were fullterm birth,3 were aborted including 1 case with other congenital abnormalities.The size of choledochal cysts was not changed in 5 cases,and was enlarged with the gestational ages in remaining 16 cases fetuses.The choledochal cysts did not affect fetal growth and development.The newborn infants with congenital choledochal cysts were treated surgically within 8 months after birth and all recovered well.Conclusion Fetal choledochal cysts have typical sonographic manifestations.Ultrasonography can be used for prenatal diagnosis of congenital choledochal cysts,which can be successfully treated by surgery early after birth.