Objective To investigate the epidemiological features of fractures caused by earthquake to elevate the quality of prevention and treatment and reduce the mortality and disability rate.Methods A retrospectire study was performed on the data of 1 262 patients with fractures caused by earthquake from May 12,2008 to Aug 31,2008.The following data was statistically analyzed:cause of injury,injured part,associated injuries and treatment.Resultsof the 1 262 cases,11 resulted in deaths;bruise and crush trauma was the major cause (93.98%)of casualties;fractures oflimbs were the main types(55.7%)of fracture;operation was the major treatment.Concluslon Correct treatment is important for fractures caused by earthquake to reduce mortality and disability rate.

OBJECTIVETo analyze the changes in CIE L*, a*, and b* at cervical, body, and incisal sites after tooth bleaching by using a spectrophotometer.

METHODSSixty-seven intact and healthy maxillary central incisors were in-vestigated. These incisors were darker than A3 according to the Vita Classical shade guide. The CIE tooth shade parameters L*, a*, and b* were simultaneously recorded at three tooth areas (cervical, body, and incisal) with a spectrophotometer before and after tooth bleaching (35%H2O2 coordinating with Beyond whitening accelerator irradiating). The shade dif-ferential (DeltaE) was calculated. ANOVA, paired t-test, and Pearson correlation analysis were used for data analysis.

RESULTSThe efficacy rates of tooth bleaching were satisfactory, with 86.6%, 86.6%, and 85.1% in the cervical, body, and incisal sites, respectively. The average values of DeltaE were 5.09, 4.44, and 4.40 in the cervical, body, and incisal sites. Tooth bleaching significantly increased L* and significantly decreased a* and b* in all tooth areas (P < 0.01). The decreasing range of Deltab* was more than the increasing range of DeltaL* at the cervical site; opposite results were observed at the incisal site. A positive correlation was detected between baseline b* and DeltaE.

CONCLUSIONThe spectrophotometer could objectively evaluate the whitening effect of tooth bleaching at the different tooth sites. The tooth bleaching system (35%H202 coordinating with Beyond whitening accelerator irradiating) exerts powerful bleaching actions in most of the tooth areas investigated. The order of tooth bleaching effectiveness is cervicalbody>incisal. Yellow coloration is decreased mainly at the cervical site, and brightness was increased mostly at theincisal site. The effectiveness of tooth bleaching increases as the baseline b* value increases.

Objective To observe the expression of mitochondrial encoding cytochrome oxidase subunitⅠ(COXⅠ) and subunitⅡ(COXⅡ) in type Ⅱalveolar epithelial cell(AEC Ⅱ) of rats exposed to hyperoxia and explore the role of COXⅠand COXⅡ in hyperoxia-induced lung injury.Methods AECⅡ were gained by primary culture from 19-days fetal rats lung.After purified,AECⅡ were randomly assigned to hyperoxia group and air group.Hyperoxia group was flushed the flake with 950 mL/L O2 and 50 mL/L CO2 at 3 L/min for 10 min,then sealed.Both groups were in CO2 culture chamber(37 ℃,50 mL/L CO2).After 6,12 and 24 hours of exposure,AECⅡ were harvested and extracted for total RNA.COXⅠand COXⅡ mRNA were detected by reverse transcription polymerase chain reaction(RT-PCR).The results were analyzed by SPSS 12.0 softwore.Results Compared with air group,COXⅠmRNA expression in hyperoxia group increased significantly at 6 hours(t=3.832 P=0.019) and 12 hours(t=10.431 P=0),respectively,then decreased to the equivalent level in 24 hours(t=0.360 P=0.731).Compared with air group,COXⅡmRNA expression in hyperoxia group increased significantly at 6 hours(t=2.795 P=0.035),then decreased to the equivalent level at 12 hours(t=0.892 P=0.40) and 24 hours(t=2.018 P=0.071).Conclusions Exposure of hyperoxia up-regulate the expressions of COXⅠmRNA and COXⅡmRNA in AECⅡ,which may be a protective mechanism of hyperoxia-induced lung injury.

Objective We aim to investigate the association between peptidylarginine deiminase type 4 (PADl4) and colorectal cancer by genotyping threetag single nucleotide polymorphisms (tagSNP) genetic maker, to explore the role of polymorphism of PAD14 gene in development of colorectal cancer. Methods A case-control study was conducted using TaqMan-PCR methods to analyze the genotypes of three TagSNPs such as rs1886302, rs2477131 and rs1635561 for 515 patients with colorectal cancer and 549 health controls. Results There is significantly different in allelic frequencies and genotype frequencies of rs1886302 between cases and controls (P=0.039 and 0.040,respectively). The OR value of A allele and AA genotype is 0.796 and 0.731,respectively,and A allele may reduce the probability of incidence of colorectal cancer. No association Was found among SNPs of rs2477131 and rs1635561 within intronl and intron 15 in terms of coloretal cancer. Conclusion Rs1886302 on PADI4 might be a susceptible SNP to coloretal cancer.

Corresponding author:PAN Cong-qing,E-mail:cq.pan@163.com Objective The prevalence of diabetic foot was 2.3% for out-patients and 8.6% (208/2428) for in-patients with amputation rate of 17.3% in our hospital from May 1997 to Dec 2000, more often seen on right than left extremity and in patients over 50 years old than in the younger.

The DNA copy-number variant (CNV) is a kind of segments of DNA ranging from 1 kb to 3 Mb that is present in a variable number of copies.CNVs widely distribute across the human genome,and dramatically increases genetic diversity.In recent years,researches have found that most CNVs are closely related to complex diseases.If a cancer gene is directly encompassed or overlapped by a CNV,it may lead to activation of oncogenes or inactivation of tumor suppressor genes,and finally results in tumorigenesis.CNVs can affect gene expression,phenotype differences and phenotypic adaptations by changing gene dosages and gene activities,and then sequentially lead to tumor or any other genetic dieases.Investigating CNVs is apparently helpful for studing chromosome recombination,genomic evolution,gene expression and the pathogenesis of multiple complex diseases especially tumor.

Under the situation of national demand for cardiopulmonary resuscitation (CPR) skills, it is very important to develop a scientific and feasible education and training program to popularize CPR skills, and improve first-aid ability. This study illustrated the significance and feasibility of setting up car-diopulmonary resuscitation courses in colleges and universities. On this basis, specific suggestions and countermeasures were put forward to improve teaching organization and leadership, teaching material de-velopment, curriculum design, teaching faculty development, teacher training and laboratory construction. This study proposed to strengthen the legislation, and the implementation of first-aid qualification examina-tion in colleges and universities, making the students become the preferred educational group of CPR skills, which is of great significance to improve public popularity rate of CPR.

Objective:Colorectal cancer is related to antioxidative ability and oxidative stress level.The aim of the study was to evaluate the oxidative stress in colorectal cancer patients and to investigate the relationship between oxidative stress and colorectal cancer.Methods:A total of 60 subjects(30 colorectal cancer patients,30 normal healthy controls) were examined in the study and estimated the protein oxidation,DNA damage,lipid peroxidation and antioxidants-vitamin C,vitamin E,glutathione(GSH) and antioxidative enzymes in serum,respectively.Results:Statistically significantly higher values of protein carbonyl and advanced oxidation protein products(AOPP) were observed in colorectal cancer patients(P

OBJECTIVE:To optimize the ratio of glycerol in Chloramphenicol and Ephedrine Nasal Drops included in China's Hospitals Agents Norms.METHODS:By formula optimization and observation on clinical trials,the ratio of glycerol in Chloramphenicol and Ephedrine Nasal Drops was reduced from 300mL to 50mL.RESULTS & CONCLUSION:The Chloramphenicol and Ephedrine Nose Drops prepared in an optimized ratio of glycerol is of much less irritability,good transparency,good compliance in patients,more reliable efficacy,thus deserving to be popularized.

Objective To discuss the safety of percutaneous puncture drainage for liver abscess in patients with blood coagulation dysfunction. Methods A total of 85 patients with liver abscess, who were admitted to authors’ hospital during the period from January 2013 to January 2014 to receive ultrasound-guided percutaneous puncture drainage, were included in this study. According to the international normalized ratio of prothrombin time≥1.5 and platelet count≤50 ×109/L, the patients were divided into group A (normal coagulation group,n=67) and group B (coagulation dysfunction group,n=18). The occurrence of postoperative complications was recorded and the results were compared between the two groups. Results In both groups, no statistically significant difference in hemoglobin level existed between preoperative level and postoperative one, and no bleeding complications occurred in all patients after the procedure. Conclusion For patients with liver abscess complicated by blood coagulation dysfunction, percutaneous puncture drainage treatment is safe and reliable.