Objective To compare the efficiencies of Fenwal CS-3000 plus and Cobe Spectra blood cell separators in collecting peripheral blood stem cells. Methods Thirty-eight stem cell apheresis procedures were performed on 31 patients using Fenwal CS-3000 plus cell separator and 65 procedures performed on 45 patients using Cobe Spectra cell separator. The white blood cell counts and the percentages of mononuclear cells and CD 34 positive cells in the apheresis products of the two groups were compared. Results The WBC counts of the two groups had no significant difference. The mononuclear cell percentage was significantly higher with Fenwal CS-3000 plus than with Cobe Spectra. The mononuclear cell percentage declined with increasing WBC count when using Cobe Spectra. There was no significant difference between CD 34 positive cell percentages of the two groups. There were no significant correlations between the WBC count and the percent of CD 34 cells, between the percent of mononuclear and the percent of CD 34 cells of the apheresis products. Conclusion There is no difference between the collection efficiencies of the two blood cell separators in the collection of peripheral blood stem cells.

Objective Investigation of biological characteristics of Cdc 20AAA/+APCmin/+ mouse embryonic fibroblast(MEFs) indicate the effect of Cdc20AAA/+on growth of mouse embryonic fibroblast and the possible mechanism . Methods MEFs of Cdc20AAA/+APCmin/+, Cdc20AAA/+, APCmin/+ and WT genotype were harvested from embryos for analysis.The growth characteristics of Cdc20AAA/+APCmin/+, Cdc20AAA/+,APCmin/+and WT mouse embryonic fibroblast were analyzed through growth curve analysis and foci formation assay .Separation of sister chromatid and the presence of aneuploid were detected by karyotype analysis .Results Cell proliferation assays showed that Cdc 20AAA/+APCmin/+cells grew at an accelerated rate compared with APC min/+MEFs(P<0.01).Foci formation assay showed that the clone forming ability was significantly increased .Cdc20AAA/+APCmin/+MEFs showed a significant increase in the frequency of aneuploid compared with WT MEFs , which had a karyotype of 38 and contained prematurely separated sister chromatids .Conclusion Cdc20 carrying a null allele (Cdc20AAA/+) may accelerate the growth and proliferation of APC min/+MEFs and present the growth characteristics of the tumor cells .The possible mechanism may be associated with chromosome instability .

Objective To understand the resistance of Anopheles vectors to pyrethroid after several years mosquito control with the impregnated bed net method. Methods The resistant level was measured by the tentative diagnostic dose and degree method of China combined with the standard methods of WHO. Results In the area after more than 5 years mosquito control with the impregnated bed net method, An.sinensis had initial resistance to deltamethrin and permethrin. However, An.anthropophagus did not be captured. In the area after less than 5 years mosquito control with the impregnated bed net method, both An. sinensis and An.anthropophagus were susceptive to deltamethrin and permethrin. Conclusion In this research, no resistance of An.anthropophagus to deltamethrin and permethrin has been found. An.sinensis has initial resistance to them. So we must pay more attention to monitor the resistance in future malaria control programs.

Objective:To investigate the clinical application of cognitive behavioral therapy (CBT) and the reasons of the choosing CBT.Method:Totally 14 psychotherapists accepted a semi-structured interview,including their backgrounds of CBT training,the application of CBT in psychotherapy,their attitude toward consultative relations,their opinion on comparing other schools with CBT,and their reasons for choosing CBT.Results:The main reasons for choosing CBT included the influence of important others,the characters of CBT and personal factors.In clinical practice,the most commonly used behavioral techniques included exposure therapy,roll play,relaxation Waining and so on.The most commonly used cognitive techniques included Socratic questioning,cognitive restructuring and challenge unreasonable cognition.Conclusion:Cognitive behavioral therapy (CBT) is suitable for those who are sensible and preferring structural therapy.Nevertheless,the trend in therapy is the integration of different psychotherapy schools.

Objective:To investigate the related factors that affect the timing and prognosis of early tracheostomy in patients with multiple rib fractures.Methods:A retrospective case series study was conducted on medical data of 222 patients with multiple rib fractures who underwent tracheostomy in Affiliated Hospital of Yangzhou University from February 2013 to October 2019，including 160 males and 66 females，with the age of 18 to 85 years ［（49.5 ± 16.3）years］. According to the practice management guidelines for tracheostomy timing and the use of propensity score matching technology，there were 118 patients with tracheostomy within 7 days of tracheal intubation （early group） and 104 patients with tracheostomy after 7 days of tracheal intubation （late group） before matching，and there were 87 patients in early group and 87 patients in late group after matching. Data were compared between groups including the gender，age，underlying disease，injury severity score （ISS），Glasgow coma score （GCS），number of fractured ribs，total number of rib fractures （NTRF），first rib fracture，flail chest，traumatic brain injury，combined injuries （spine，maxillofacial，sternum），acute respiratory distress syndrome （ARDS），volume fraction of pulmonary contusion（VPC），blood lactic acid （within 24 hours of admission），hemothorax，pneumothorax，mechanical ventilation time，duration of tracheostomy，time from tracheal intubation to incision，length of hospital stay，length of stay in ICU，closed thoracic drainage，number of fiberoptic bronchoscopy，multi-drug resistant bacteria infection，ventilator-associated pneumonia，antibiotic use time，duration of sedative and analgesic drugs used and 28-day mortality. The multivariate Logistic regression analysis was used to predict independent risk factors for early tracheostomy. The Pearson method was used to compare the relationship between multiple factors. The receiver operating characteristic （ROC） curve was used to predict indicators that affect the prognosis of patients with early tracheostomy，and calculate the best cut-off value. The Kaplan-Meier single factor and COX multivariate survival were used to analyze the relevant factors affecting the 28-day mortality of patients.Results:（1） In early group，the NTRF，ARDS and VPC were higher than those in late group，and the time from tracheal intubation to incision and 28-day mortality rate were lower than those in late group （ P < 0.05），while the two groups showed no significant differences in the gender，age，underlying diseases and ISS （ P > 0.05）. （2） The multivariate Logistic regression analysis showed that there was statistical significance in NTRF （ OR = 1.775，95% CI 1.439-2.188），ARDS（ OR = 3.740，95% CI 1.441-9.711），VPC （ OR = 1.087，95% CI 1.052-1.124） （ P < 0.05）； the Pearson method analysis showed a significant correlation between VPC and NTRF （ r = 0.369， P < 0.05） and a low degree of correlation between ARDS and VPC （ r = 0.179， P < 0.05），but there was no significant correlation between ARDS and NTRF （ r = 0.132， P > 0.05）. （3） The ROC curve analysis showed that the area under the curve （AUC） of the VPC and NTRF ［AUC = 0.832 （95% CI 0.770-0.893），AUC = 0.804 （95% CI 0.740-0.868）］ were significantly higher than those of the number of rib fractures ［AUC = 0.437（95% CI 0.352-0.523），GCS ［AUC = 0.519 （95% CI 0.432-0.605）］ and ISS ［AUC = 0.484 （95% CI 0.398-0.571）］ （ P < 0.05）. After calculating the Yorden index，the best cut-off value for VPC was 23.9，and the best cut-off value for NTRF was 8.5. （4） The Kaplan-Meier single factor and multivariate COX model survival analysis showed that the 28-day survival ratio of patients with early tracheostomy was significantly better than that of late tracheostomy （ P < 0.05）. Conclusions:The NTRF，ADRS and VPC are independent risk factors for the timing and prognosis of early tracheostomy. There is a significant correlation between VPC and NTRF. The VPC ≥ 23.9% and or NTRF ≥ 8.5 can be used to predict early tracheostomy in patients with multiple rib fractures. Early tracheostomy may benefit the 28-day survival of patients with multiple rib fractures.