Objective To explore the relation among depression,hopelessness and suicide risk,as well as the mediating effect of hopelessness between depression and suicide risk.Methods 1 381 students were recruited from five junior middle schools in Linyi by using cluster random sampling.They were investigated with General Situation Questionnaire,Scale for Suicide Ideation(SSI),Beck Hopelessness Scale (BHS) and Beck Depression Iventory (BDI).Results Suicide risk in junior middle school was significant positively correlated with depression and hopelessness (r=0.43 and 0.64 respectively,P＜0.01).Hopelessness partly mediated the relationship between depression and suicide risk (55.8％).Furthermore,hopelessness showed partial mediating effect on the relationship between depression and suicide risk in boys (42.7％) and in 7th Grade students (29.9％),and also complete mediating effect in girls (74.1％) and in 8th Grade students (95.3％).Conclusion The suicide risk in middle school students increase with the increasing of the severity of depression and hopelessness.The hopelessness plays different mediating effects on relation between depression and suicide risk in students with different gender and grade.

Kennedy disease,a motor neuron disease,is an adult onset form of spinal and bulbar amyotrophy characterized by the damage of low motor neuron and uncompleted androgen insensitivity syndrome.So far,there is no effective treatment.This article is intended to provide neurologist with information about Kennedy disease in epidemiology,etiology,pathogenesis,clinical feature,treatment and so on.

Objective To explore the expression of plasminogen activator inhibitor-3 (PAI-3) in normal adult skin. Methods Immunohistochemistry and RT-PCR were used to detect the expressions of PAI-3 and uPA. Results mRNA of PAI-3 and uPA were detected. PAI-3 was mainly expressed in stratum basale, stratum spinosum and stratum granulosum, and its expression enhanced in the well differentiated keratinocytes of the epidermis. uPA was located in basal layer. Conclusion PAI-3 exists in normal adult skin and is related with the differentiation of epidermal keratinocytes.

Objective To improve health care workers’(HCWs)infection prevention and control consciousness through carrying out catheter-associated urinary tract infection(CAUTI)prevention and control project,and imple-ment prevention and control measures in practical work.Methods Diagnostic criteria of CAUTI issued by the U.S. Centers for Disease Prevention and Control/National Healthcare Safety Network were adopted,from October 2013 to September 2014,monitoring was conducted on CAUTI in patients with indwelling urinary catheters for >2 con-secutive days at different types of ICUs in hospitals participated in the project .Results A total of 14 124 CAUTI cases were collected,410 patients developed CAUTI,urinary catheter usage rate was 79.33%(203 114/256 042), incidence of CAUTI was 2.02‰(410/203 114),urine specimen detection rate was 46.52%(6 570 /14 124).The detection rate of urine specimens increased from 37.24% (the fourth quarter of 2013)to 49.76% (the third quarter of 2014).Of prevention measures,the difference in the indication of catheterization was significantly different(P <0.01).Conclusion Through the development of competence building project of healthcare-associated infection pre-vention and control,prevention and control of CAUTI has achieved good intervention effect.

To retrospective analyze the clinical profiles of 80 patients undergoing thoracotomy with protection of intercostal nerve versus traditional method.The doses of narcotics of two groups were (12 ± 5)and (43 ± 11) mg respectively.The postoperative levels of visual analogue score (VAS) and such potential complications as pneumonia,atelectasis and paraesthesia were examined (P ＜ 0.01).Protective technique of intercostal nerve during thoracotomy could effectively relieve postoperative chest pain,reduce the dosage of narcotics and lower the occurrence of lung complications.

Objective To explore the clinicopathological features of osteofibrous dysplasia (OFD). Methods All the clinicopathological information of 17 cases of OFD were reviewed,including sex,age,course and radiography or histopathology features. The expression of Cytokeratin(CK) was examined by SP. Results Age of the patients ranged from 2-15 years, and the course of the lesion ranged from 1 month to 7 years. The mean age and the mean course was 7.2 years and 2.1 years respectively. Male to female ratio was 1∶1.4. The lesions all occured in tibia, presentating with localized masses. Only one invloved with both tibia and fibula. Radiographs showed there were cystic lesions in the thickened anterior cortex of the tibia with light marginal sclerosis. Histopathology showed a zonal architecture. Abundant osteoblasts in the vicinity of the trabeculae. Only two cases were positive for CK(11.8%). 8 of 10(80%) patients recurred. Conclusion OFD is predominately involved with the tibia in children. The history is long. It has a characteristic histopathologic image and clinical progress. Its a independent entity, not the same of adamantinoma.

Mycotoxins,secondary metabolites produced by certain fungi,have become one of the most harmful factors that affect the clinical safety of medicinal herbs that probably can be contaminated by harmful toxins generated from fungi in the whole process from planting to clinical use. Therefore,more toxicological research of mycotoxins,a better knowledge of the pathogenesis and quick detection with sensitivity and accuracy will play an important role in targeted therapy of poisoning by mycotoxins and early warning . In this paper,the current status of mycotoxin contamination in medicinal herbs was ana?lyzed,and the progress of toxicological study on common contaminants was reviewed. In view of the high toxicity of toxins,the strategy of ″Prevention First″ is highly desirable. Hence,the development of rapid detection of typical mycotoxins was systematically discussed. The review was intended to provide ref?erence for ensuring clinical safe administration of medicinal herbs and for reducing the risk of mycotoxin poisoning.

Objective To analyze the risk factors for ventilator-associated pneumonia(VAP) in the intensive care unit(ICU) of a hospital,and provide theoretical reference for preventing and controlling VAP.Methods ICU patients receiving mechanical ventilation for more than 48 hours between October 2013 and December 2014 were monitored by targeted monitoring method,risk factors for the occurrence of VAP were analyzed.Results A total of 483 patients received mechanical ventilation for more than 48 hours,76 (15.73％) of whom developed VAP;the overall ventilator days were 5 347 days,incidence of VAP was 14.21 per 1 000 ventilator days.Univariate analysis showed that groups of gender,age,length of hospital stay,and duration of artificial airway were all significantly different,VAP rate in male patients was higher than that in female patients(x2 =9.838,P＜0.01);VAP rate was highest in patients aged 41-70 years(x2 =10.242,P＜0.01),followed by patients aged≥71 years;VAP rate were relatively higher in patients with longer length of hospital stay and longer duration of artificial airway(x2 =59.533,P＜0.01;x2 =74.215,P＜0.01,respectively).Conclusion Incidence of VAP in the ICU of this hospital is higher,especially in male patients,patients aged 41-70 years,as well as patients with long length of hospital stay and long duration of artificial airway.

Using the method of SWOT,the author analyzed the advantages and the weaknesses of the scientific research administration of the hospital.It realed that the exterior opportunities and the interior strength are important to establish hospital reputation.On the other side,involvement in scientific research is essential for carreer development of medical professionals.Suggestions are made to optimize the efficiency of scientific research administration so as to promote the core competency of the hospital.