The xMOOC model of campus open course was analyzed according to the problems in domestic and foreign MOOC construction and the specific characteristics of online learning in campus open course. The roles of students, teachers, performance assessment system and observers were analyzed, which showed that their roles were not accu-rately positioned. Suggestions were put forward for improving the campus open course xMOOC.

OBJECTIVE:To study the perioperative use of prophylactic antibiotics in a hospital.METHODS:210 surgery patients were sampled randomly from Apr.to Aug.2006 in a hospital and investigated in respect of the perioperative use of prophylactic antibiotics based on the Guiding Principle of the Clinical Application of Antibacterials.RESULTS:Of the 210 cases,the ratio of perioperative use of antibiotics were as high as 98.10%,the application ratio of antibiotics in depuratory operation was 96.97%,and were 100% in other kinds of surgeries.The application ratios of antibacterials 0.5～2 h before surgery,after operation and during operation stood at 25.73%,21.84% and 52.43%,respectively.The average duration of antibiotic use was 3.17 d,with a maximum of 13 d.The duration of antibiotic use in depuratory operation,depuratory-contaminant operation and contaminant operation were 1.40,3.60 and 8.19 d,respectively.Antibacterials used singly totaled 23 kinds,of which,cefuroxime,latamoxef,amoxicillin/potassium clavulanate,cefminox and norvancomycin hydrochloride topped the first 5 places.CONCLUSION:The results show that the rate of application rate of antibiotics in this hospital is on the high side,the preventive medication indications were unclear and the drug use was lack of special aim,the management on which remains to be standardized.

BACKGROUND:Artificial cornea titanium scaffold has a higher complication rate in clinical usage; therefore, to seek a kind of artificial corneal scaffold with high biocompatibility is a hot spot.
OBJECTIVE:To explore the biocompatibility of the artificial cornea titanium scaffold with hydroxyapatite surface modification.
METHODS: Twenty-seven New Zealand white rabbits were enroled to make alkali burn models of the right cornea and then randomized into three groups: in experimental group, artificial cornea titanium scaffold with hydroxyapatite surface modification was implanted into the right eye; in control group, artificial cornea titanium scaffold was implanted into the right eye; in blank group, no scaffold was implanted into the right eye. At 2, 4, 16 weeks after implantation, the right corneas were taken out for pathological observation and scanning electron microscope observation.
RESULTS AND CONCLUSION:At 16 weeks after implantation, there was no difference in the number of inflammatory cels and fibroblasts among the three groups. Over time, in the experimental group, the corneal tissues, fibrous tissues and adhered extracelular matrices were increased gradualy. In addition, the experimental group had more adherent corneal tissues, extracelular matrices and better tissue healing than the control and blank groups. These findings indicate that the artificial cornea titanium scaffold with hydroxyapatite surface modification had good biocompatibility that can effectively promote proliferation of corneal cels and corneal vascularization.

The construction of open course for information literacy education in the era of ubiquitous network was described according to the COOC self learning platform that we developed with information retrieval course construc-tion as its standards.

Four bacterial and 8 fungal isolates were incubated in media for 6 days. It was found that organic acid content in the media increased largely, but pH decreased sharply. Phosphorus content in the media enhanced dramatically as well. The fungal isolates showed stronger ability to dissolve phosphate rock than the bacterial ones. These isolates excreted not only quite distinct volume of organic acids but diverse organic acid chemicals. The fungi produced more kinds of organic acids than the bacteria. However, there was no significant relationship between the total quantity of organic acids and P content in the media.

Objective:To study the application of direct immunofluorescence in detecting RSV antigen in children respiratory syncytial virus(RSV)pneumonia.Methods:Multi-center,block randomization,parallel control clinic tests were adopted.To use Qingkailing Injection and Ertongqingfei Oral Liquid as test group and ribavirin injection and Compound Guaiacol Potassium Sulfonale Oral Solution as control group for treating accumulation of phlegm-heat in lung syndrome in children RSV pneumonia.Direct immuno uorescence was used to detect RSV turning to negative in different period in treatment time.Results:The time of turning to negative of test group was earlier than the control group's.In the case of 208 include 108 in the test group and 98 in the control group,it had statistic significance(P0.05).Conclusion:Detection of RSV antigen by direct immuno uorescence is simple,stable,sensitive and special.It is better in choosing clinical case and tracing clinical effect and should be widely applied in clinic.

To cultivate laboratory medicine undergraduates with innovation ability , we estab-lished laboratory medicine undergraduates innovation ability training system by formulating flexible teaching plan, reforming teaching methods, setting up diversified practice base, implementing 'eagles plan' and connecting with international content. Satisfactory effect was achieved after taking this measure.

Objective To investigate the advantage of separate bolus injection technique in CT urography (CTU) improving the display of the whole urinary tract.Methods Sixty cases of CTU examination,were divided into observation group and control group by random digits table with 30 cases each,observation group used separate bolus injection technique and control group used single bolus injection technique.The scanning included routine scanning,cortical phase,medullary phase and lag phase.Reconstruction of lag phase displayed the whole urinary tract.Then the image quality was compared between two groups.Results The whole urinary tract showed excellent in 12 cases (40.0％,12/30),good in 17 cases (56.7％,17/30),normal in 1 case (3.3％,1/30) in control group,which showed excellent in 23 cases (76.7％,23/30),good in 7 cases (23.3％,7/30) in observation group,there was significant difference in excellent rate between two groups (P ＜ 0.01).The CT value of starting of ureter was (238.6 ± 82.5) HU,middle-lower ureter was (245.9 ± 112.3) HU in control group and (239.0 ± 93.8),(235.3 ± 74.6) HU in observation group,there was no significant difference between two groups (P ＞0.05).There was no difference in developing of urolithiasis between two bolus injection techniques.Conclusion The application of separate bolus injection technique in CTU examination can reduce the dose of the first contrast material and contrast material reaction,and receive high-quality image of the whole urinary tract.

Objective:To investigate the clinical efficacy of levodopa combined comprehensive therapy on the children with ametropic amblyopia.Methods:One hundred three patients (180 eyes) with ametropic amblyopia admitted into our hospital from April 2013 to March 2016 were randomly divided into the control group and the study group.Fifty-two patients (90 eyes) in the control group were treated with comprehensive therapy,and fifty-one patients (90 eyes) in study group were treated with levodopa combined comprehensive therapy.After six months of treatment,the treatment efficacy,pattern visual evoked potential (P-VEP),visual sensitivity,and visual function of patients were observed and compared between the two groups,and the adverse reaction were recorded and compared.Results:At six months after treatment,the effective rate of study group was 90.00％,which was significantly higher than that of control group (68.89％,P＜0.05).The wave amplitude ofP-VEP Pl00 of both groups showed a remarkable increase,which was much higher in the study group (P＜0.05);the incubation period in both groups were obviously decreased,while they were markedly lower in the study group (P＜0.05).The visual acuity under 100％,25％,10％ and 5％ of spatial frequency were conspicuously higher than those of control group (P＜0.05).And correction convergence range,and correction separation range in study group were much higher than those of control group,and corrected near stereo vision was markedly lower than that of control group (P＜0.05).Additionally,no significant difference was found in the incidence of adverse reactions between the two groups (P＞0.05).Conclusion:Levodopa combined comprehensive therapy had a good ability of improving function of visual central neurons,visual acuity and binocular stereo vision functions.

Objective To study conventional laparoscopic instruments line single hole peritoneoscope gallbladder excision and three hole laparoscopic cholecystectomy surgery efficacy and safety.Methods 140 cases patients with gallbladder stones in our hospital from January 2014 to June 2015 were selected as the research subjects.All patients need to be treated with cholecystectomy.All the patients according to the random number table were randomly divided into two groups,respectively for single hole group and three group.Single hole group using a single hole peritoneoscope gallbladder excision,triplex group use three hole laparoscopic gallbladder resection.The surgical effect,hospitalization costs and complications were compared between the two groups after treatment.Results Hole group operation time (87.89 ± 12.81) min,longer than the three-hole group (53.89 ± 8.91) min,but the hospital stay was (1.28 ± 0.21) d and total hospital costs (11 241.21 ± 23.91) yuan,were lower than three-hole group,P ＜ 0.05,the difference was statistical significance in the amount of bleeding in the two groups were not statistical significance,P ＞ 0.05;two groups of patients had complicatiom,but have been treated better,and two concurrent disease (1.43％ vs 2.86％) incidence was no significant difference,P ＞ 0.05.Conclusion Single hole laparoscopic cholecystectomy reduce the hospitalization time and hospitalization expenses,surgical trauma is smaller,postoperative recovery is faster,and the safety is high,it is worthy of clinical application.