Objective To explore the effect of pigtail and silicone catheters on thoracic close drainage. Methods Sixty-one patients undergoing closed thoracic drainage hospitalized in our department from June 2013 to November 2016 were divided into the control group (n=31) and observation group (n=30). The control group was treated with closed pleural drainage using silicone catheter and the observation group using pigtail catheter. The two groups were compared in respect of drainage effect nursed the same. Results The extubation time, wound healing time of the observation group were all significantly shorter than those of the control group ( P<0.05). The pain score, complication rate and hospitalization cost were all significantly lower as well ( P < 0.05). Conclusions The pigtail catheter is more effective in the treatment of pneumothorax. It can alleviate pains, reduce the complication rate and surgical scar, and improve patient's satisfaction.

Objective To explore the application value of ECG tube current modulation technology of dual source CT in coronary angiography,compared with retrospectively ECG-gated technique.Methods 200 patients were randomly divided into ECG tube current modulation group (Group A)and retrospectively ECG-gated group(Group B).In Group A,the main parameters were the exposure time windows of full dose,which were set according to different heart rates.χ2 test was adopted in the subjective score,and t test was used in the objective score and radiation dose.Results There was no statistical significance in image quality between the two groups(χ2 =2.125,tnoise =-0.557,P >0.05 );The effective dose (ED)of Group A and Group B were (3.30±0.40)mSv and(6.90±1.76)mSv,respectively.The difference was statistically significant (t ED =-1 9.954,P <0.05).The radiation dosage of Group A was 52% lower than that of Group B.Conclu-sion Compared with retrospectively ECG-gated technique,the ECG tube current modulation technique ensures the image quality, and at the same time it can significantly reduce the radiation dose,therefore,it can be used as a routine examination technique of cor-onary angiography.

Flipped classroom as a new teaching mode provides a new idea for the reform of teaching and learning of medical genetics. This paper analyzes the feasibility of flipped classroom applied in medical genetics teaching and puts forward the concrete teaching design and practice process. That is, establishing task list, making teaching materials, drafting progress process and so on before class; implementing group reporting, teacher reviewing and in-class test in class; after class conducting comprehensive evaluating, summarizing and feedback, etc. Meanwhile, combining the practice, the experience and deficiency of flipped classroom is summarized in the end. Preliminary evaluation shows that the flipped classroom teaching im-proves students'!autonomous learning initiative, but it still needs to be improved in the course of medical genetics.

Objective To observe and measure the anatomical structure of approach of vertical facial nerve canal and put forward the normal measurement range and the location relationship among the vertical segment of facial nerve canal, the posterior wall of external acoustic meatus and the rear edge of external ear,and discuss the relationship and clinical significance between the mastoid gasification and the vertical segment of facial nerve canal. Methods 1. Evaluate the accuracy of CT image of related structure, using spiral CT in scanning four skull specimens, get the horizontal distances of the vertical segment of facial nerve canal to the posterior wall of external acoustic meatus and the rear edge of external in the axial position, and get the sagittal diameter of mastoid (the horizontal distance from the lowest point of external auditory inferior canal to the rear edge of mastoid) and the height (the vertical distance between the lowest points of the external auditory canal wall to the mastoid tip) in the sagittal position. And then saw the skull specimens to measure the distance in the same lay with CT image, and discuss the statistics difference of the distance between the values of CT imaging measurements and the dry entities cranial measurements on hand. 2. Study on people: 118 patients (236 sides) with non-ear disorders were randomly selected, among which there were 63 females (126 sides) and 55 males (110 sides). They were subjected to maxillofacial CT scan in the same layer that used above, and the horizontal distances of the facial nerve canal to the posterior wall of external acoustic meatus and the rear edge of external ear were measured. In addition, half of the product of diameter and height of the mastoid was defined as mastoid area, which was used to define the extension of mastoid gasification. Then related analysis and regression analysis were done between the vertical segment of facial nerve canal and the posterior wall of external acoustic meatus, as well as the rear edge of external ear. Results 1.Part of the experiment: There was no significantly different on the indicator values between CT image the entity measurements among the four skull specimens (P>0.05). 2. Study on people: There was no significantly different between left side and right side(P>0.05), but significantly different between genders(P<0.05). Between mastoid area and the distance from the vertical segment of facial nerve canal to the posterior wall of external acoustic meatus there is inverse correlation, and the relevance has the remarkable significance. However, there was no correlation between mastoid area and the vertical segment of facial nerve canal to the rear edge of external ear. Conclusion There was some relationship between the location of the vertical segment of facial nerve canal and external acoustic meatus. Anatomic position of vertical facial nerve cancal and the posterior wall of external acoustic meatus can be showed clearly. CT and in combination with primitive axial images may provide reliable evidence for the diagnosis facial nerve dieases and the choice of ear surgery route.