ABSTRACT
Objective To establish a method of quick three-dimensional (3D) reconstruction of pubic symphysis based on magnetic resonance imaging. Methods The pelvis images of adult male were generated on a 3.0 T scanner using a T1 Gradient Echo FLASH-3D (T1- FL3D) sequence and imported the images into medical image control system. Segmentation of binaryzation threshold was conducted and pelvic soft tissue image was extracted by regional growth, 3D structure model of pubic symphysis was obtained by Boolean operation. The 3D structure model of pubic symphysis was established by the noise reduction of reverse engineering software. And compared with the 3D reconstruction model pubic bone CT scan. Results The morphological characters of the MRI pubic symphysis 3D model, such as the ridges and furrows on the symphysial surface, lower extremity, dorsal margin (beveling), margin (beveling) and pubic tubercle, were highly consistent with the morphological characters of the 3D model established by CT scan. Conclusion MRI scan can be used to reconstruct the 3D structure of pubic symphysis quickly and effectively, and it can provide a safe radiation-free 3D visualization imaging technique for forensic age estimation for the living.
ABSTRACT
Objective To study the optimal management of the closed-loop management in safe practice of nursing teaching in private hospitals.Method Through analyzing the causes and problems during the teaching of nursing adverse events,the closed-loop management in safe practice of nursing teaching was investigated,including the closed-loop management team,implementation cycle and range,etc.Totally 100 teachers and 220 students were chosen in 27 clinical teaching departments of our hospital during January 2013 and March 2014.The teachers were divided into experimental group (n=50) and the control group (n=50).The closed-loop management model was applied in experimental group while routing management was applied in control group.At the same time,220 students' behavior in experimental group was compared before and after the closed-loop management.Through the evaluation of nursing teaching' safe hidden trouble and questionnaire survey,the nursing teaching of both groups were safe.SAS 9.2 was applied to do statistical analysis and non-parametric Wilcoxon Fisher exact test and x2 test were used.Results The number of teachers' operating key points in experimental group was significantly higher than the control group,with statistically significant differences (46 vs.15) (P=0.000).The safety hazard times of nursing teaching were 38 and 8 respectively before and after the closed loop management,and the difference was statistically significant (P=0.000).In addition,the comparison before the students' implementing the check system,hospital safety index patients and regulation for technical operations and hospital infection was significant after the closedloop management (P＜0.01 for all).Conclusion The full implementation of the closed-loop management,effective tracking and prevention in place,can optimize the safety management of nursing teaching.