Research on the evaluation system of nuclear emergency medical rescue drills / 中华医学教育探索杂志

Objective:To explore the formulation of the evaluation system of nuclear emergency medical rescue drills.Methods:By using the analytic hierarchy process, theoretical analysis and expert consultation, the evaluation system was established, and online questionnaires were used to investigate student satisfaction. Excel software was used for data entry, Matlab 6.5 software was used for weight calculation, and questionnaire data were authorized to SPSSAU online platform to analyze the correlation coefficient between trainees' attitude towards drills and satisfaction of the evaluation system.Results:An evaluation system of nuclear emergency medical rescue drills composed of multiple indicators was constructed, and the weights of each indicator of the system were obtained. The corresponding weights for group comprehensive proficiency, topic theoretical oral examination, personal practice and virtual system were 0.108, 0.557, 0.280 and 0.054, respectively. Simultaneously, the evaluation of the system by the trainees was investigated, and it was found that there was a significant correlation between the trainee's attitude towards the drills and satisfaction with the system.Conclusion:The nuclear emergency medical rescue evaluation system formed in this research is expected to provide theoretical methods for comprehensive evaluation of students' knowledge and capabilities, and at the same time it's helpful to improve the nuclear emergency rescue capabilities of students.

Research progress on radioprotective effects of bee products / 中华放射医学与防护杂志

Radiation exposure is an ongoing and serious threat in military and public health concern, and there is an unmet need for effective preventative or mitigative treatment against radiation-induced injuries. The handful of FDA approved radiation protection agents cannot be widely used due to their side effects. Some natural non-toxic compounds such as bee products have been reported to prevent and treat radiation-induced injuries of oral mucosa, esophagus, skin, liver, intestine and hemopoietic system by reducing radiation-induced oxidative stress, apoptosis and DNA damage, indicating that they may be potential options of safe radioprotective agents. In this paper, the experimental and clinical studies on prevention and treatment of radiation injury by bee products were reviewed.

Organizing, implementation and thinking of the drill teaching of nuclear emergency medical rescue / 中华医学教育探索杂志

In order to improve our military's medical support capabilities, the Army Military Medical University regularly organizes comprehensive military medical drills, of which nuclear emergency medical rescue is an important subject. Therefore, it is urgent to form a standardized teaching process of nuclear emergency medical rescue drills. Firstly, based on the two major tasks of nuclear emergency medical rescue, and "emergency treatment of nuclear wounded in killing area" and "early treatment of nuclear wounded in developing area," a nuclear emergency medical rescue drill teaching process has been formed, including "reconnaissance, detection, classification, decontamination and treatment". Then, it's applied to actual teaching, and the problems in teaching are found by analyzing the changes in the rescue ability of the students before and after learning. Finally, the corresponding improvement measures are put forward to open up new ideas for drill teaching.

Application of PBL combined with situational teaching in medical rescue of nuclear emergency teaching / 中华医学教育探索杂志

Objective:To explore the application effect of problem-based learning (PBL) combined with situational teaching in medical rescue of nuclear emergency teaching.Methods:The 100 students from Batch 2017 of the Army Medical University were selected as the teaching objects, and the nuclear emergency medical lessons were divided into two parts: the control group (the first 20 lessons) and the experimental group (the last 20 lessons). The control group adopted traditional teaching method, the experimental group adopted PBL teaching mode for theoretical teaching, and situational teaching method for skill practices. The teaching effect of the two groups of students were examined by theoretical examination, skill practical assessment and questionnaire survey. SPSS 17.0 was used for chi-square test.Results:Theoretical examination results of experimental group (77.10±8.11) were higher than those of control group (73.97±7.93), with significant differences ( P<0.01). Practical assessment results of experimental group (78.40±6.35) was higher than those of control group (71.04±7.51), with significant differences ( P<0.01). Concerning the results of theoretical examination, practical assessment and student self-evaluation, the experimental group was superior to the control group in all aspects (all P<0.05). Conclusion:Compared with traditional teaching methods, the PBL combined with situational teaching could encourage the learning interest of students, enhance their ability of independent learning, promote them to master the knowledge and skills of medical rescue of nuclear emergency adroitly, cultivate their team spirit and elevate the practical ability of students.

Application of problem-based learning in the teaching of nuclear protection medicine under E-learning environment / 中华医学教育探索杂志

Objective@#To explore the feasibility of problem-based learning (PBL) teaching method in teaching nuclear protection medicine under E-learning environment.@*Methods@#A total of 120 students from Class 1 (experimental group) and 141 students from Class 3 (control group) of 5-year clinical medicine in Grade 2014 were included. The control group adopted the traditional teaching method, that is, theoretical knowledge was taught by teachers in theory class and practice was made by students after teachers introducing methods and precautions, and making demonstrations in experimental class. The experimental group adopted PBL teaching method based on E-learning and the simulation software of nuclear accident medical emergency rescue.@*Results@#Average theoretical scores in the experimental group (79.61±7.71) were higher than those in the control group (73.66±7.89), with statistically significant difference (P<0.05). According to the results, 74.2% (89/120) students in the experimental group had a relative good experience of PBL under E-learning environment; 72.5% (87/120) had better comprehension of nuclear protection medicine; 82.5% (99/120) students considered that the simulation software of nuclear accident medical emergency rescue was able to help them get familiar with and comprehend the operation procedures; 80.0% (96/120) students believed that it was able to stimulate interests for study and exploration; 77.5% (90/120) students considered that it was able to promote study initiatives; 84.2% (101/120) students believed that it was able to deepen understandings to nuclear protection medicine.@*Conclusion@#Application of PBL teaching methods in the teaching of nuclear protection medicine under E-learning environment can better enable students to comprehend what they have learned, achieving better teaching effectiveness.

Application of problem-based learning in the teaching of nuclear protection medicine under E-learning environment / 中华医学教育探索杂志

Objective To explore the feasibility of problem-based learning (PBL) teaching method in teaching nuclear protection medicine under E-learning environment. Methods A total of 120 students from Class 1 (experimental group) and 141 students from Class 3 (control group) of 5-year clinical medicine in Grade 2014 were included. The control group adopted the traditional teaching method, that is, theoretical knowledge was taught by teachers in theory class and practice was made by students after teachers introducing methods and precautions, and making demonstrations in experimental class. The experimental group adopted PBL teaching method based on E-learning and the simulation software of nuclear accident medical emergency rescue. Results Average theoretical scores in the experimental group (79.61±7.71) were higher than those in the control group (73.66±7.89), with statistically significant difference (P<0.05). According to the results, 74.2％(89/120) students in the experimental group had a relative good experience of PBL under E-learning environment; 72.5％ (87/120) had better comprehension of nuclear protection medicine; 82.5％ (99/120) students considered that the simulation software of nuclear accident medical emergency rescue was able to help them get familiar with and comprehend the operation procedures;80.0％(96/120) students believed that it was able to stimulate interests for study and exploration; 77.5％ (90/120) students considered that it was able to promote study initiatives; 84.2％ (101/120) students believed that it was able to deepen understandings to nuclear protection medicine . Conclusion Application of PBL teaching methods in the teaching of nuclear protection medicine under E-learning environment can better enable students to comprehend what they have learned, achieving better teaching effectiveness.

Research progresses in the mechanism and treatment of the impaired wound healing of combined radiation?trauma injury / 中华放射医学与防护杂志

Combined radiation-trauma injury is mainly observed in radiation treatment of cancer and radiation injury with traumatic patients. The prominent problem of combined radiation-trauma injury is delayed or prolonged wound healing. The mechanism of the impaired wound healing is complicated, and the current effective treatment method are limited. This paper reviews the mechanism and treatment of this impaired wound healing, including the cellular depletion, stromal cell dysfunction, aberrant collagen deposition, microvascular damage, as well as the targeted therapies for the impaired wound healing such as stem cell repletion, antioxidant therapy, transforming growth factor beta-1 ( TGF-β1 ) modulation, and implantable biomaterials. This paper is designed to provide a reference for further deep research on the mechanism and treatment of radiation-trauma injury.

Characteristics and significance of interferon-induced protein with tetratricopetide repeats 1 expressed in radia-tion injury and infection stress / 局解手术学杂志

Objective To explore characteristics and significance of interferon-induced protein with tetratricopetide repeats 1 expressed in radiation injury and infection stress.Methods RNA was extracted from Raw264.7 cell,3T3 cell and 10T1 /2 cell after 5 hours stimulated with 5 μg/mL LPS.At the same time,to set up normal control group (untreated by LPS),and RNA of IFIT1 was detected by RT-PCR.Total-ly 20 C57 /BL6 mice were randomly divided into 4 groups,namely 0 h group,1 h group,4 h group and 12 h group.The mice were given 12 Gray60Co full-body exposure once,then liver IFIT1 was detected by western blot.Results Stimulated with LPS for 5 hours,IFIT1 was in-duced expression in Raw264.7 cell,3T3 cell and 10T1 /2 cell.The expression of normal control group was negative.The level of IFIT1 /Actin increased significantly 1 hour after radiation injury,and it reached the peak 12 hours after radiation injury (P <0.01).Conclusion LPS can stimulated a variety of cell lines expressed IFIT1,prompting that IFIT1 may participate in the occurrence and development of post-traumatic toxemia.IFIT1 of liver tissue increased significantly during the early stage in radiation mice.

Rapid identification of low activity of depleted uranium using portable γ-spectrometer / 中华放射医学与防护杂志

Objective To explore the feasibility of using portable γ spectrometer to rapidly identify the low activity of depleted uranium and the underlying conditions.Methods Firstly,high purity germanium (Ge) γ spectrometer was used to analyze energy spectrum of DU samples (5 g) and calculate nuclide percentage of 235U in an attempt to ascertain the properties of these DU samples.The portable γ spectrometer was used to provide the evidences for identification of DU samples.Secondly,portable γ spectrometer was also used to identify DU samples of same group.These samples contain 1 g DU powder and 0-5 g environmental clay powder,which were sealed with double layer pocket,and then detected with a distance of 1-5 cm during the longest detection time of 10 min.According to the detection of nuclide activity of 238U and 235U in the samples and the subsequent calculation of specific activity,the nuclide percentage composition was calculated and the existence of DU was confirmed if this value of 235U was less than 0.718％.Results The activity of 238U was detected using portable γ spectrometer under all test conditions,while the activity of 235U was detectable only under certain test conditions (MA ≥ 1 g,DN ≤ 1 cm).Under the condition that the 238U and 235U was both detected,the nuclide percentage of 235U was all less than 0.718％,which suggested that the DU was confirmed.Conclusions The energy spectrum of low activity of DU and the type of nuclide could rapidly be identified and evaluated by using portable γ spectrometer.This is same as the conclusions obtained with high purity Ge γ spectrometer,α spectrometer and ICP-MS.

Protective role of ghrelin in depleted uranium-induced damage of MC3 T3-E1 cells / 局解手术学杂志

Objective To evaluate the impact of ghrelin on depleted uranium ( DU)-induced damage of the osteoblast MC3T3-E1. Methods MC3T3-E1 cells were treated with different doses of ghrelin for 1 h before DU (500 μM) treatment. After 24 hours,the cell via-bility,intracellular tartrate-resistant acid phosphatase (StrACP),alkaline phosphatase (AKP),osteoprotegerin (OPG),solvable receptor acti-vator of nuclear factor-κB ligand ( sRANKL) ,catalase ( CAT) and reactive oxygen species ( ROS) were measured. Results After DU expo-sure,ghrelin pretreatment increased the cell viability and CAT levels,and reduced intracellular StrACP,AKP,sRANKL/OPG and ROS in a dose-dependent manner. Conclusion Through maintaining the balance of OPG/RANKL and reducing the oxidative stress,ghrelin could pro-tect against DU-induced damage of MC3T3-E1 cells.

Expression of interferon-induced protein with tetratricopetide repeats 1 and liver cell apoptosis in mice with severe burns / 中南大学学报(医学版)

OBJECTIVE@#To explore the relationship between the expression of interferon-induced protein with tetratricopetide repeats 1 (IFIT1) and liver cell apoptosis in the acute stress period after severe burns.
@*METHODS@#A total of 25 C57/129 adult mice were randomly divided into the normal control group (0 h) and the groups at 1, 6, 12 or 24 after severe burns (n=5 per group). A model with third degree (20% of the total body surface area) burn injury was established and then liver tissues were taken. IFIT1 expression was examined by Western blot. The expression of caspase-3 and -8 was measured by immunohistochemistry. Liver cell apoptosis was detected by terminal deoxynucleotidyl transferase mediated nick end labeling (TUNEL).
@*RESULTS@#After burns, IFIT1 expression was increased at 1 h, which reached the highest level at 
6 h followed by a decrease at 12 h, which reached minimum level at 24 h. The differences between groups were significant (P<0.01). The caspase-3 and -8 levels significantly increased after burns in a time-dependent manner (P<0.01). Although at 0 h and 1 h there was no significant increase in liver cell apoptosis, the increase reached significance from 6 h to 24 h (P<0.01).
@*CONCLUSION@#The increase in IFIT1 expression after severe burns promotes liver cell apoptosis.