0.05). In the control group, the intima of grafted veins were thickened evidently with proliferated vascular smooth muscle cells (VSMCs) and the media thickness were slight. Compared with the control group, the intima was slightly thickened in the treatment group, but there were significant reductions in proliferated VSMCs. Additionally, the media thickness was unobvious in treatment group. Compared with the control group, the thickness and area of neointima and the expression of PCNA in the treatment group were significantly lower than those in the control group (P

Objective:To explore the application effect of small private online course (SPOC) teaching mode in clinical practice teaching of thoracic surgery.Methods:A total of 56 undergraduate students who were internships from May to July 2018 were selected as subjects. They were randomly divided into experimental group and control group. SPOC teaching mode and traditional teaching mode were respectively adopted in the practice teaching, and the teaching effect was evaluated by questionnaires and written examinations. SPSS 22.0 was used for statistical analysis, ttest for independent-sample test, and chi-square test for counting data. There were significant differences when P<0.05. Results:The questionnaire showed that the six teaching effect evaluation indicators of the experimental group were higher than those of the control group ( P<0.01). In terms of written test assessment, the average score of the experimental group was significantly higher than that of the control group, with significant differences ( P<0.05). Conclusion:The SPOC teaching mode can improve the teaching effect of clinical practice in thoracic surgery and improve students' self-learning ability.