Objective To investigate the value of echocardiography in the diagnosis of interrupted aortic arch (IAA). Methods Forty-three children that diagnosed as IAA by transthoracic echocardiography (TTE) were reviewed. The results of CTA (CT Angiography) and operation also were compared. Results Among the 43 children, 41 was admitted as IAA by operation and 2 were diagnosed as coarctation of aorta. According to the type of IAA, 25 cases were diagnosed as type A, 13 cases were diagnosed as type B, 3 cases were diagnosed as type C. Thirty-ifve cases were diagnosed by TTE correctly, 3 cases were misdiagnosed by TTE, 4 cases were suspected as IAA by TTE and ifnally conifrmed by operation. The accuracy rate was 81%(35/43). Among the 35 deifnite diagnosed cases, corrected typing cases were 30, the accuracy rate was 86%(30/35). The accuracy rate of type A, B, C were 96%(23/24), 64%(7/11) and 0. According to the results of CTA, 40 cases were diagnosed correctly, 1 case was misdiagnosed. The accuracy rate was 98%(40/41). Among the deifnite diagnosed cases, corrected typing rate was the same with operation result. Conclusions TTE is the ifrst choice for the detection of IAA. During TTE, in case the indistinct display of aortic arch, CTA should be used to improve the accuracy rate of IAA.

Objective To design an auxiliary measurement device for anterior cruciate ligament injury in order to improve the accuracy of specialist examination and postoperative functional assessment.Methods The device consisted of a main frame and support pads,which was designed based on the principles of anatomopathology and mechanical mechanics.The frame was set above and paralleled to the tibia,and the measurement scale was put at the vertical direction of the frame.The support pads were fixed to the tibia and patella respectively to execute auxiliary measurement by providing opposite acting force.Results The success rate of preliminary diagnosis by the device was higher than that by traditional method.Conclusion The device gains advantages in convenience,practicality,low cost and etc,and is worthy promoting in the orthopedics department.

Objective To explore whether quercetin-loaded PEG-PE micelles(M-Q) can synergize the growth-in-hibitory activity of adriamycin prepared ( ADR) by reversing the drug resistance of MCF-7 ADRr breast cancer cells in vitro.Methods M-Q was prepared by adding saline to lipid film containing quercetin and PEG-PE.The size of M-Q was characterized by dynamic light scattering ( DLS) .The inhibition of MCF-7 ADRr cells was evaluated by MTS assay after incubation with M-Q and ADR.Results The incorporation efficiency of quercetin by the micelles was above 74%.The average size of M-Q was 11.11 nm.Compared with the quercetin dissolved in ethanol , M-Q more effectively reversed the drug resistance of MCF-7 ADRr cells in vitro.Conclusions PEG-PE micelles may potentially deliver quercetin to cancer cells for reversal of drug resistance .

This study was aimed to explore the features of clustered regularly interspaced short palindromic repeats (CRISPR) structures in Shigella by using bioinformatics. We used bioinformatics methods, including BLAST, alignment and RNA structure prediction, to analyze the CRISPR structures of Shigella genomes. The results showed that the CRISPRs existed in the four groups of Shigella, and the flanking sequences of upstream CRISPRs could be classified into the same group with those of the downstream. We also found some relatively conserved palindromic motifs in the leader sequences. Repeat sequences had the same group with corresponding flanking sequences, and could be classified into two different types by their RNA secondary structures, which contain "stem" and "ring". Some spacers were found to homologize with part sequences of plasmids or phages. The study indicated that there were correlations between repeat sequences and flanking sequences, and the repeats might act as a kind of recognition mechanism to mediate the interaction between foreign genetic elements and Cas proteins.
Base Sequence ; Clustered Regularly Interspaced Short Palindromic Repeats ; Computational Biology ; Genome, Bacterial ; Plasmids ; Shigella ; genetics

Objective To construct a new replicating adenovirus vector CNHK600-p53 carrying anti-tumor gene p53 and investigate its effect on hepatocarcinoma cell line PLC/PRF5. Methods The methylthiazolyl tetrazolium assay (MTT) was used to observe the killing effect of Fluorouracil, Mitomycin and Epirubicin alone or in combination with adenovirus CNHK600-p53 on PLC/PRF5. Results When 5-Fu at concentration of 400?g/ml, the inhibition rate was (65?4. 2) % ; with MMC at 1?g/ml, the rate was (41?1.9)%; and it was (65?1.8)% when EPI at concentration of 10?g/ml. With PLC/PRF5 infected by adenovirus CNHK600-p53 ( MOI = 0. 625) , the inhibition rate was significantly increased to (89?5. 3)%,(60?2.3)% and (75?1.5)% respectively; When MOI was 0.3125, 0.625, 1.25, the inhibition rate in CNHK600-p53 group and Ad-p53 group was (27?2. 5)% , (30?3. 7)% , (61?4. 3)% and(4?2.7)%, (5?3.5)%, (16?4.5)% respectively. Conclusion For hepatocarcinoma cell line PLC/PRF5 the effect of CNHK600-p53 is stronger than Ad-p53.

OBJECTIVE:To provide baseline data for the formulation of the strategy for medical institutions in China. METH-ODS:3 600 discharged medical records were randomly collected from our hospital in 2013. According to drug package inserts,the judgment was carried out about whether off-label drug use existed in medical orders. The types of off-label drug use,off-label drug use of children in different age groups and of various drugs were all analyzed. RESULTS:A total of 3 268 hospitalized children were includ-ed,and 35 523 medical orders were analyzed,involving 468 types. Based on children,medical orders and drug types,the incidence of off-label drug use were 91.34%,35.72%and 48.72%,respectively. The types of off-label drug use mainly included pediatric medica-tion information(74.21%), exceeding route of administration(8.12%)and overage(8.45%). The top 3 age groups with respect to the incidence of off-label drug use were adolescents(42.42%),neonate(37.97%)and infant(35.48%). Top 4 drugs of off-label use in the list of medical orders were anti-infective drugs(23.65%),electrolytic,drugs for acid-base balance and nutrition(12.21%), drugs for respiratory system(36.84%)and cardiovascular drugs(63.21%). CONCLUSIONS:The off-label drug use of hospitalized children is common in our hospital. It is urgent to develop related laws and regulations or guidelines to regulate off-label drug use in or-der to ensure the safety of pediatric drug use.

Objective To detect the influence of marOR mutations on antibiotic resistance in Shigella spp. Methods The marOR gene with four-base deletion was amplified by overlap PCR, then inserted in a T-vector and transformed into DH5α. The clone of marOR gene with four-base deletion and three point mutations was prepared from the strain having these mutations. Electrophoresis and sequencing were preformed to certify the correction of the cloned genes. Drug susceptibility tests were preformed for the strains harbouring the different clones [DH5α, DH5α (T), DH5α (marOR), DH5α (marOR-CATT), DH5α(marOR-CATT + 3m)]. Results Compared with the control strain (DH5α-T), the antibiotic resistances of marOR with four-base deletion [DH5α (marOR-CATT)] were higher to streptomycin, tobramycin, cefazolin and cefalexin, and the antibiotic resistances of marOR with four-base deletion and three point mutations [DH5α (marOR-CATT + 3m)] were higher to streptomycin and to tetracycline. The antibiotic resistances of DH5α (marOR-CATT) and DH5α (marOR-CATT +3m) to streptomycin, tetracycline, chloramphenicol, cefazolin, levofloxacin, ciprofloxacin and norfloxacin were higher than DH5α (marOR). The diameters of the antibiotics except the trimethoprim between DH5α (marOR-CATT) and DH5α (marORCATT +3m) had not significant disparity. Conclusion The four-base deletion in 1376-1379 sites of the marOR gene increased the resistance of Shigella spp to some antibiotics. The point mutations in 1411, 1417,1435 sites of the marOR gene have little influence on the antibiotic resistance of Shigella spp.

Purpose Elderly patients with primary hepatocellular carcinoma (HCC) have gradually increased in recent years. Most patients also have systemic disease with poor cardiac and pulmonary function, thus can only receive non-surgical treatment. This paper is to assess the clinical efficacy of transcatheter arterial chemoembolization (TACE) and prognostic factors of HCC in elderly patients. Materials and Methods A retrospective analysis was performed in 106 patients with HCC diagnosed by US, dynamic CT or dynamic MRI [average age (74.9±3.3) years, range 71-84 years] and treated by TACE. The clinical characteristics, survival and prognosis factors were analyzed. Results Follow-up was performed at a median of 18 months (range 1–40 months). The 1-, 2-, and 3-year overall survival (OS) rates were 80.2%, 42.5% and 22.6%, respectively. Univariate analysis showed that the patient's gender and cirrhosis, HBV/HCV infection, diabetes and systemic disease were not significantly correlated with prognosis (P>0.05). Child grade, Eastern Cooperative Oncology Group (ECOG) grade, tumors size, number of tumors, serum alpha-fetoprotein level, portal vein tumor thrombus and Barcelona clinic liver cancer stage were significantly related to OS (P<0.05, P<0.001). Moreover, the Cox multivariant survival analysis revealed that portal vein tumor thrombus, tumor size, serum alpha-fetoprotein level and ECOG stage were independent prognostic indicators (P<0.05, P<0.001). Conclusion Systemic disease does not impact long-term survival in elderly patients with HCC. Portal vein tumor thrombus, tumor size, serum alpha-fetoprotein level, and ECOG grade are independent prognostic indicators.

Objective To investigate the pathogen characteristics of perforated appendicitis in children and the perioperative use of antimicrobials in order to provide evidence for the rational use of perioperative antibiotics. Methods The perioperative usage of antibiotics was analyzed to determine the reasonableness of antimicrobial use in children with perforated appendicitis who were discharged from July 2011 to August 2014,based on“guidelines of clinical use of antibiotics”and results of bacterial culture. Results Inflammatory secretions obtained from 126 children(126/ 149)were sent for examination and the examination rate was 84.56%.A total of 117 cases were found positive for cultured pathogens,and the detection positive rate was 92.86%.Three types of bacteria ranking the first three places were Escherichia coli,Pseudomonas aeruginosa and CitroBacter freundii.The utilization rate of antibacterial agents was 100.00%,with a dominant use of cephalosporins and nitrate imidazoles. Rational use of antimicrobial agents was found in 144 cases(accounting for 96.64%). Conclusion The major pathogen in perforated appendicitis is still Escherichia coli,which is highly sensitive to commonly used antibiotics,and drug-sensitivity testing results can help guide the treatment programs and antibiotics selection.

Objective To investigate the current status of critical thinking ability and commu-nication ability of nursing students, therefore providing reference for teaching reform. Methods The Critical Thinking Scale translated and revised by Pro. Peng MeiZi of Hong Kong Polytechnic University, and Supportive Communication Scale (SCS) edited by Whetten and his colleague were used to investi-gate nursing students' levels of critical thinking and communication ability among 176 selected nursing students in our college, with method of Random Cluster Sampling. Descriptive analysis, single sample t-test, and two independent sample t-test were applied to the collected data with SPSS l7.0. Results①The average score of critical thinking for the investigated college nursing students was (264.54± 29.94). 72.73% of them got 210~280 points, in which three items: cognitive maturity (t=4.695, P=0.000), open mind (t=4.016, P=0.000), and intellectual curiosity (t=2.973, P=0.003) were greater than 40 points. And the differences were statistically significant; compared to different individual character-istics, being a student cadre (t=3.494, P=0.001) or not is of statistical significance. ②The total average score of communication ability (t=3.219, P=0.002) for college nursing students,as well as the score of providing effective negative feedback (t=6.790, P=0.000) and supportive communication (t=4.267, P=0.000) were significantly higher than median 3.00. And the differences were statistically significant. Conclusion In order to improve the critical thinking ability and interpersonal communication ability of nursing students, and educate the nursing students to adapt to society and complicated clinical nursing environment, it is necessary to reform the curriculum setting, curriculum design and teaching method.