Objective: To investigate the prevalence of overweight and obesity among children and adolescents in Yangzhou City, and its association with screen behaviors, so as to provide scientific evidence for weight management among students. Methods: In May 2025, an electronic questionnaire survey was conducted among children and adolescents in Yangzhou City. A total of 3 722 participants were selected from grades 4 to 12 in 18 primary and secondary schools (108 classes) by using stratified cluster random sampling. The Chi square test was used to compare the differences in the detection rates of overweight and obesity among children and adolescents with 5 types of screen behaviors (watching TV, playing electronic games, scrolling short videos, screen based learning, electronic socializing) in different time groups each day (never, >0~<2 h, ≥2 h). Multivariate Logistic regression analysis was performed to examine the associations of five types of screen behaviors, presence of electronic devices in the bedroom, and screen use during meals on the weight status of children and adolescents. Results: The prevalence of overweight and obesity among children and adolescents was 37.3%. For all five types of screen behaviors, the differences in the distribution of overweight and obesity detection rates among children and adolescents across the three time spent categories were statistically significant ( χ 2=30.76- 70.78 , all P <0.01). After adjusting for confounding factors, multivariate Logistic regression analysis revealed that frequent or always using screens during meals( OR =1.63, 95％ CI =1.14~2.31), playing video games ( OR =1.28, 95% CI =1.11-1.48), browsing short videos ( OR =1.29, 95％ CI=1.09-1.54), and screen based learning ( OR =1.26, 95％ CI =1.10-1.44) were significantly associated with overweight and obesity among children and adolescents (all P <0.05). Conclusions Excessive screen use is positively correlated with the incidence of overweight and obesity in children and adolescents. Targeted interventions on screen behaviors among children and adolescents are therefore warranted.

Objective To observe the effect of Dexmedetomidine (DEX)on induction peri-od of hemodynamics in patients undergoing general anesthesia combined with epidural block.Meth-ods A total of 40 hysterectomy patients in optional period (ASA Ⅰ~Ⅱ)were randomly divided into Dexmedetomidine group(Group D)and Propofol group(P group).Group D received continuous epidural anesthesia with infusion of DEX 0.5 μg /(kg·h)and endotracheal intubation was applied after general anesthesia.Group P was given the same therapy with group D except dexmedetomi-dine.HR,SBP,DBP and MAP of the hemodynamic index were recorded at the time of entering the operation room(T1),after the determination of epidural plane(T2),pre-intubation(T3),intu-bation(T4),immediately after trachea intubation(T4),and the beginning of operation(T4).Results The difference was not statistically significant in the index between the two groups at T1 .HR of group D was lower than that in group P at all-time points(P <0.05).SBP,DBP and MAP of group D were higher than group P at T2,T3 and T4(P <0.05).SBP,DBP,MAP of group D were lower than group P at T5 and T6(P <0.05).SBP、DBP and MAP in group D at T2、T3 and T4 were higher than that in the group P (P <0.05).Conclusion Dexmedetomidine can offer a stable hemo-dynamics in the patients with general anesthesia combined with epidural block.

Objective To observe the effect of Dexmedetomidine (DEX)on induction peri-od of hemodynamics in patients undergoing general anesthesia combined with epidural block.Meth-ods A total of 40 hysterectomy patients in optional period (ASA Ⅰ~Ⅱ)were randomly divided into Dexmedetomidine group(Group D)and Propofol group(P group).Group D received continuous epidural anesthesia with infusion of DEX 0.5 μg /(kg·h)and endotracheal intubation was applied after general anesthesia.Group P was given the same therapy with group D except dexmedetomi-dine.HR,SBP,DBP and MAP of the hemodynamic index were recorded at the time of entering the operation room(T1),after the determination of epidural plane(T2),pre-intubation(T3),intu-bation(T4),immediately after trachea intubation(T4),and the beginning of operation(T4).Results The difference was not statistically significant in the index between the two groups at T1 .HR of group D was lower than that in group P at all-time points(P <0.05).SBP,DBP and MAP of group D were higher than group P at T2,T3 and T4(P <0.05).SBP,DBP,MAP of group D were lower than group P at T5 and T6(P <0.05).SBP、DBP and MAP in group D at T2、T3 and T4 were higher than that in the group P (P <0.05).Conclusion Dexmedetomidine can offer a stable hemo-dynamics in the patients with general anesthesia combined with epidural block.

Objective Observing the effect of general anesthesia (GA) with remifentanil on parturients undergoing cesarean section and Apgar score of child.Methods 40 parturients were divided into two groups,GA combined remifentanil (group A,n =20) and standard GA(group B,n =20).Observe the change of hemodynamics parameter and Apgar score of child.Results In group A than in group B maternal hemodynamic index smooth,two groups of intubation after lmin SBP,DBP,HR decreased,while the5 min after intubation returned to normal.SBP DBP,HR before induction,the difference between groups was not statistically significant (P＞ 0.05),the two group after induction,SBP,DBP,HR intubation after 1 min were (120.8 ± 19.6 mm Hg,80.6 ± 11.2 mm Hg,98.1 ± 17.1 BPM),(128.1 ± 17.5 mm Hg,98.9 ± 13.8mm Hg,108.7 ± 20.7 BPM) after intubation of 5 min were (98.3 ± 24.7 mm Hg 75.3 ± 13.8 mm Hg,79.9 ±22.6 BPM),(121.5 ± 16.2 mm Hg,88.6 ± 13.7 mm Hg,110.5 ± 17.4 BPM) had a significant difference (P ＜ 0.05),neonatal 1 min,5 min Apgar score,no significant differences between the two groups (P ＞0.05).Conclusion When remifentanil is used in the general anesthesia,its inducing is smoothly and it is no significant bad effect on the newborn.