Medical students will be the clinicians in the future.The medical moral education and the moral character formation will directly influence their medical careers.It is extremely important for the medical students to know basic theory of the medical moral and develop their character by strengthening the medical moral and criterion education,especially in the time of increasing conflicts between doctors and patients.

Objective To compare the effects of different ischemic preconditioning (IP) protocols on the viability of primary cultured sinoatrial node cells from neonatal rats for investigating the protective effect of IP. Methods The cells were randomized into eleven groups: control, ischemia/reperfusion (I/R), IP1 (preconditioned with ischemia/reperfusion for 5 min), IP2 (preconditioned with 2 cycles of ischemia/ reperfusion for 5 min), IP3 (preconditioned with 3 cycles of ischemia/reperfusion for 5 min), IP4 (preconditioned with ischemia/reperfusion for 10 min), IP5 (preconditioned with 2 cycles of ischemia/reperfusion for 10 min), IP6 (preconditioned with 3 cycles of ischemia/reperfusion for 10 min), IP7 (preconditioned with ischemia/reperfusion for 20 min), IP8 (preconditioned with 2 cycles of ischemia/reperfusion for 20 min), and IP9 (preconditioned with 3 cycles of ischemia/reperfusion for 20 min). PI positive staining rate and changes of D 490 after 3 h ischemia/4 h reperfusion were determined by PI staining and MTT chromatometry. Results ① D 490 value in sinoatrial node cells in each experimental group was significantly lower than that in the control group, but that in IP2, IP3, IP4, IP5, and IP7 groups was significantly higher than that in I/R group (P

Objective:To investigate the relationship between college freshman adaptation and adverse childhood events,and to explore the mediating role of personality characteristics.Methods:A sample of 523 college freshmen from a key university in Sichuan Province was assessed with the China College Student Adjustment Scale (CCSAS),Adverse Childhood Events Questionnaire (ACEQ) and Eysenck Personality Questionnaire-Revised,Short Scale for Chinese(EPQ-RSC).Results:The rate of adverse childhood events of college freshmen was 87％ in current study.The total scores of adaptation were negatively correlated with the scores of adverse childhood events influence and neuroticism (r ＝-0.13,-0.51,Ps ＜ 0.01),while positively correlated with introversion-extroversion and lie (r ＝ 0.47,0.25,Ps ＜ 0.01).The scores of adverse childhood events influence were negatively correlated with scores of introversion-extroversion (r ＝-0.08,P ＜0.05) and lie (r ＝-0.12,P ＜0.01),while positively correlated with scores of neuroticism (r ＝ 0.17,P ＜ 0.01).Introversion-extroversion and neuroticism mediated the relationship between adverse childhood events influence and college freshman adaptation,the mediating effects were 51.65％ and 58.10％.Conclusion:College freshman adaptation may be closely associated with adverse childhood events influence and personality characteristics.Personality characteristics may play a mediating role between adverse childhood events influence and adaptation in college freshman.

Objective To evaluate the effects of gender and age on median-effective target plasma concentration(EC50)of propofol administered by target controlled infusion(TCI)causing respiratory depression.Methods Eighty ASA Ⅰ or Ⅱ patients aged 40-79 yr,with body mass index 18-25 kg/m2.undergoing general anesthesia were divided into 4 groups(n=20 each):1 middle-aged male group(MA);Ⅱ middle-aged female group(FA);Ⅲold male group(MO) and Ⅳo ld female group(FO).No premedication was administered.Propofol Was administered by TCI for 15 min,using TCI system incorporating Marsh pharmacokinetic model.EC50 Was determined by up-end-down sequential trial.The target plasma concentration(Cr)was set at 3.1μg/ml in the first Patient in each group.Each time Cr increased/decreased by 10%in the next patient depending on whether or not the respiratory depression occurred.Respiratory depression was defined as RR<8 bpm,Vr≤5 ml/kg,end-tidal PCO2≥50 mm Hg,SaO2≤94%and/or apnea≥15s.Results The EC50 and 95%confidence interval of propofol TCI causing respiratory depression were 6.40(6.09-6.72)μg/ml in group MA,5.93(5.54-6.34)μg/ml group FA,4.58(4.32-4.91)μg/ml in group MO and 4.37(4.14-4.61)μg/ml in group FO.EC50 was significantly lower in group FO than in group FA and in group MO than in group MA,but there Was no significant difference in EC50 between group MA and group FA or between group MO and FO. Conclusion The potency of propofol given by TCI causing respiratory depression is increased in the old patients as compared with the middle-aged patients and is not related to sex.

Objective To explore the gender difference in clinical features and outcomes of elderly patients with coronary true bifurcation lesions after percutaneous coronary intervention (PCI).Methods A total of 169 consecutive patients were included in the study, who were diagnosed coronary true bifurcation lesions by coronary angiography (CAG)and received PCI in our hospital from December 2013 to December 2015.All patients were divided into 2 groups according to their gender (71 femals and 98 males).Angiographic characteristics of the coronary lesions and clinical data were analyzed in both groups.Clinical outcomes during follow up were recorded and studied.Results The levels of total cholesterol (TC), triglyceride (TG),high density lipoprotein cholesterol (HDL-C) and low density lipoprotein cholesterol (LDL-C) in the female group were significantly higher than in the male group (all P<0.05).The levels of BUN,Cr,UA,CyC and TBIL in the female group were significantly lower than in the male group (all P<0.05).Comorbidity rates of hypertension and diabetes were higher in female patients without significant differences (P>0.05).The median follow-up time was 17 months and the incidence rate of overall adverse events in women was higher than that of men (25.4% vs.11.2%, P<0.05).Conclusions The clinical outcomes of elderly patients with coronary true bifurcation lesions after PCI had gender differences.The rates of adverse events in female patients was found significantly higher than male patients.

Objective To investigate the significance and effect of ultrasonic diagnosis on the autologous bone marrow mesenchymal stem cells (MSC) in angiogenesis. Methods Twenty-four New Zealand rabbits were divided into experiment group (12) and the control group (12). Then rabbit bone marrow MSCs from experiment group were isolated, caltured and marked with Brdu. After ischemic hind limb animal model on all rabbits was set up, autologous bone marrow MSCs were directly injected into the ischemic hind limb muscles in experiment group while same volume normal saline was used in the control group. Two weeks after the implantation of autologous bone marrow MSCs, 2D and color Doppler flow imaging (CDFI) detection were used in rabbit femoral artery of the two groups to observe the inner diameter of the blood vessel, the peak velocity and the acceleration time. The disposition of transplaned cells and the state of angiogenesis in ischemic muscles were assessed using immunofluorescence staining. Results The results of 2D and Doppler ultrasound detection showed the inner diameter of the blood vessel and the peak velocity of the blood current in experiment group obviously higher than that of the control group , and the acceleration time was obviously smaller than that of the control group P<0.01. The immunofluorescence staining showed there were transplanted cells existed in transplanted portion and state of angiogenesis was supurior obviously than that of the control. Conclusions Bone marrow MSCs had the effect to promote angiogenesis. Implantation of autologous bone marrow MSCs was a simple and efficient therapeutic method for the ischemia hind limb. Using high-frequency ultrasound to detect femoral artery may provide a practical and useful method to evaluate the effect on implanted autologous bone marrow mesenchymal stem cells.

Twenty-three patients with pain from osteoporotic vertebral fractures,aged 65-90 yr,weighing 51-78 kg,received an image intensifier-assisted nerve-root block with a 6-8 ml mixture of 0.5 ％ lidocaine,mecobalamine 0.5 mg and betamethasone sodium phosphate injection 5.26 mg in a prone or lateral position.The VAS scores before operation,at 0,1 week,1 and 3 months after operation were 8.6 ± 0.9,1.5 ± 0.7,2.8 ± 0.9,1.6 ± 0.5 and 2.5 ± 0.7,respectively.VAS scores were significantly lower at each time pint after operation than before operation (P ＜ 0.05).According to modified MacNab standard,the effectiveness of treatment was rated as excellent/good in 87％ of the patients.No complication such as bleeding,hematoma,infection,pneumothorax,hemopneumothorax,headache was found during or after operation.Selective nerve-root block is effective in the treatment of pain resulting from osteoporotic vertebral fractures in patients.

OBJECTIVETo explore the clinical outcomes of open reduction and internal fixation with calcaneal locking plates in treating Sanders type II and III calcaneal fractures.

METHODSFrom January 2010 and October 2012, 38 calcaneal fractures with Sanders type II or III were treated with open reduction and internal fixation with calcaneal locking plate. According to the Sanders classification, 15 fractures were classified as type II, 23 fractures as type III. The patients were divided into two groups (group A and B) according to the different fixed methods. Sustentaculum tali was fixed with one screw in group A, including 13 males and 5 females, with a mean age of (38.56±8.03) years old (ranged, 25 to 55). And sustentaculum tali was not fixed in group B, including 16 males and 4 females, with a mean age of (42.35±8.29) years old (ranged, 29 to 53). Clinical effects were evaluated according to the changes of Böhler's angle and the Maryland Foot Score and VAS score.

RESULTSAll patients were followed up from 12 to 20 months with a mean of 14 months. Böhler's angles and subtalar joints obtained satisfactory reconstruction in all patients. One year after operation, the mean Maryland Foot Score was 88.61±7.59 in group A; and was 82.40±9.24 in group B; Maryland Foot Score of group A was higher and foot functional rehabilitation was better than group B. The mean VAS score was 13.39±11.47 in group A; and was 22.50±13.10 in group B; VAS score of group A was lower and foot pain was less than group B.

CONCLUSIONSustentaculum tall screw fixation has advantages of strong fixed strength, high stability, less postoperative pain, rapid functional recovery in treating Sanders type II and III calcaneal fractures.

Adult ; Bone Plates ; Bone Screws ; Calcaneus ; injuries ; surgery ; Female ; Fracture Fixation, Internal ; methods ; Fractures, Bone ; surgery ; Humans ; Male ; Middle Aged ; Recovery of Function

OBJECTIVETo investigate the effect of antidepressant on irritable bowel syndrome (IBS).

METHODSA self-control and follow-up study on subclinical dosage of antidepressants therapy (fluoxetine 10 mg/d, paroxetine 10 mg/d or doxepin 45 mg/d) for 9-12 wks in 46 patients with refractory IBS symptoms according to Rome II criteria was performed, the clinical outcomes were evaluated by scales changes of symptom-related-anxiety, severity index of symptom, and quality of life specific of IBS, as well as general psychiatric health by SCL-90 during treatment and follow-up periods.

RESULTSAll 46 cases completed therapy and first follow-up unit (12 wks after treatment) (FFU), at the end of FFU, clinical symptoms in all patients were improved (P < 0.01). Comparison of the scores of symptom-related-anxiety, index of symptom, and quality of life specific of IBS at the end of FFU with that at basal level, indexes of the severity (3.4 +/- 1.5 vs 1.8 +/- 0.84) and frequency (3.8 +/- 1.60 vs 2.0 +/- 0.76) of symptoms were subsided significantly (P < 0.01, respectively); the scores of symptom-anxiety questionnaire including body anxiety (16.04 +/- 1.65 vs 10.83 +/- 1.64, P < 0.001), cognitive anxiety (18.78 +/- 2.12 vs 11.17 +/- 1.89, P < 0.001), fear (15.80 +/- 1.76 vs 10.78 +/- 1.85, P < 0.001) and avoiding (15.47 +/- 1.53 vs 10.16 +/- 1.59, P < 0.001) were also subsided significantly. In the meantime, IBS-QoL improved significantly (P < 0.05), dysphoria, body image, interference with activity, health worry, social reaction and overall scores were improved significantly (P < 0.01, respectively). The status of general psychiatric health was also improved significantly (P < 0.01).

CONCLUSIONSTreatment of refractory IBS with subclinical dosage antidepressant is rational and effective, However a further study on its mechanisms is suggested.

Adult ; Antidepressive Agents ; administration & dosage ; Doxepin ; administration & dosage ; Female ; Fluoxetine ; administration & dosage ; Follow-Up Studies ; Humans ; Irritable Bowel Syndrome ; drug therapy ; Male ; Middle Aged ; Paroxetine ; administration & dosage ; Quality of Life

Objective To investigate the prevalence of GJB2 ,SLC26A4 and mitochondrial DNA 12S rRNA m .1555A>G(mtDNA 1555A>G) mutations in Hui ethic group patients with nonsyndromic hearing loss (NSHL) from Northwest China .Methods A total of 420 peripheral blood samples were collected from unrelated Hui ethic group probands with NSHL in Northwest China .Amplified the target gene by polymerase chain reaction (PCR) af-ter extracting genomic DNA from whole blood .The mtDNA 1555A>G mutation was detected by PCR -Alw26I di-gestion ,then direct sequencing was used to the positive samples of mtDNA 1555A> G ,the coding region of GJB2 gene ,exon 8 and 19 of SLC26A4 gene .Results There were 11(2 .62% ) cases caused by mtDNA 1555A>G homo-zygous mutation in 420 patients with NSHL .There were 41(9 .76% ) cases including homozygote and compound het-erozygote ,caused by GJB2 gene mutation ,which was the most frequent deafness -related gene .The allel frequency of c .235delC accounted for 6 .90% ,as well as the most frequent(51 .33% ) mutational pattern in GJB2 gene .There were 20 patients(4 .76% ) were found carring two allel mutations in SLC26A4 gene .The allel frequency of c .919 -2A>G was 5 .0% ,accounting for a total of 68 .85% in all base alterations of SLC26A4 gene ,which was the major mutant form of SLC26A4 gene .Conclusion GJB2 gene is the most common deafness -gene in Hui ethnic group pa-tients with NSHL from Northwest China ,while c .235delC is the main mutant form ,and c .919-2A>G is the hot-spot mutation of SLC26A4 gene .Through this study we can provide the molecular epidemiology basis for Hui ethnic group patients with NSHL from Northwest China in genetic diagnosis ,genetic counseling and therapy by associated testing of three frequent hearing loss genes .