Mobile phone addiction and mental health among Chinese vocational college students: the role of selfcontrol and selfesteem / 中国学校卫生

Objective@#This paper discussed possible mechanisms of mobile phone addiction on mental health of vocational college students, and to explore the role of selfcontrol and selfesteem in this association.@*Methods@#Totally 898 vocational college students from Liaocheng, Kunming and Wuhan were selected by random cluster sampling. Subjects were investigated with the Mobile Phone Addiction Index, DepressionAnxietyStress Scale (short version), SelfControl Scale, and SelfEsteem Scale.@*Results@#About 27.6% of the participants selfreported mobile phone addiction. Mobile phone addiction score (45.80±10.41)was positively correlated with mental health(36.18±9.13)(P<0.01). A significant negative correlation was found between mobile addiction tendency with selfcontrol and selfesteem (both P<0.01). Male students scored higher on depression, anxiety and stress than female students(t=3.57, P<0.01). Selfcontrol played a partial intermediary role in the association between mobile phone addiction and mental health(β=-0.36, P<0.01). The influence of mobile phone addiction tendency on depression and stress were moderated by selfesteem.@*Conclusion@#Mobile phone addiction has a direct and indirect effect on mental health through selfcontrol. With increasing level of selfesteem, effect of mobile phone addiction on mental health tends to become weaker.

Study of the feasibility on medical gas suction feeding device for replicating model of respiratory failure in dogs / 天津医药

Objective To investigate the feasibility and stability of medical gas suction feeding device for copying the model of respiratory failure in dogs. Methods The self-designed medical gas suction feeding device was used to establish the model of respiratory failure in dogs. After regulating the proportion of oxygen (O2), carbon dioxide (CO2) and nitrogen (N2), the fraction of inspiration O2 (FiO2) was decreased, while the forced inspiratory carbon dioxide (FiCO2) was increased. At the same time, the breathing out pathway was open to make the arterial oxygen partial pressure p (O2) and arterial blood carbon dioxide partial pressure p (CO2) reached and stabilized in a stable condition. The arterial blood samples between default state and 1 hour, 2 hour after modeling were collected to detect the blood gas index. Results One hour after the establishment of model, the p (O2) was≤60 mmHg (1 mmHg=0.133 kPa), and p (CO2) was≥50 mmHg (1 mmHg=0.133 kPa), which suggested that the dog model of respiratory failure was established successfully. Compared with the basic state, data of pH, oxygen content, oxygen saturation (SaO2) and residual alkali (BE) were decreased at 1 hour and 2 hour after modeling (P 0.05). Conclusion Under the regulation of the medical gas suction feeding device, the respiratory failure state of large experimental animals is successfully established.