0.05).

By analyzing 94 questionnaires of majors in medical imaging technology on medical ethics teaching,we found that some teaching models will help students realize the necessity of studying medical ethics and case teaching,including increasing the expansion of case teaching,selecting certain videos and short films into case teaching,expanding case-study model and case-exploration model,strengthening teachers' after-case-teaching summary to advance and further ethical themes.These models will also improve students' ability in ethical analysis and their sense of ethics,and will surely apply the theoretical principles into practice once they are interested in studying medical ethics.

Objective: To investigate the changes of haemodynamics, pulmonary mechanics and blood gas in volume controlled and pressure controlled ventilatory patterns during one-lung ventilation (OLV). Methods: 20 patients with patent ductus arteriosus (PDA) underwent left thoracotomy PDA ligation with right OLV. The patients were divided into three groups: two-lung ventilation with volume controlled (TLV-VCV), one-lung ventilation with volume controlled (OLV-VCV), and one-lung ventilation with pressure controlled (OLV-PCV). After two-lung ventilation with VCV, one-lung ventilation was started by VCV and the ventilation mode was then switched to PCV. All measurements were made 25 min after initiation of the ventilation mode. The respiratory mechanics index was measured by side stream spirometry (SSS), including peak airway pressure (Ppeak), plateau pressure (Pplat), airway resistance (Raw), lung compliance (Cdyn) and inspiratory and expiratory minute ventilation (Mvi, Mve). Cardiac output (CO), stroke volume (SV), systemic vascular resistance (SVR), left ventricular ejectiontime (LVETi), and aortic blood flow acceleration (ACC) were also measured, by using the transesophageal Doppler (TED) monitor. Arterial blood gases was determined in every ventilation mode. Results: Ppeak、Pplat and Raw were significantly higher during OLV-VCV than that during TLV-VCV (P

Shenjincao injection was prepared from the extract of Lycopodium cernuum L. by ultrafiltration or wateralcohol methods,respectively,and then injected intra-peritoneally in groups of rats contaminated with quartz powder to assess their prophylactic effects. After 5 weeks of treatment,the rats were dissected and the fresh and dried weights,collagen content and the pathologic grading of the lungs were examined. Results showed that Shenjincao injection prepared with ultrafiltration was effective for the prophylactic treatment of experimental silicnsis of rats,while that prepared with water-alcohol method was devoid of such effect. The antisilicosis active principle of Shenjincao was explored and discussed.

Seven cases of cystic eckinococcosis( CE) were surveyed retrospectively in 2008. The results showed that 6 of thosepatients were locally infected. It is important to investigate the course and characteristics of CE transmission in non-endemic areas.

Objective To analyze the practicality of current diagnostic criteria of invasive fungal infection (IFI) in patients with hematologic diseases/malignant tumors,so as to enhance the recognition of characteristics of pulmonary IFI after allogeneic hematopoietic stem cell transplantation (allo-HSCT).Methods The clinical features of 51 cases with IFI after allo-HSCT were analyzed retrospectively.Results Pulmonary IFI accounted for 42.1％ (51/121) of the whole infectious pneumonia diagnosed among the patients admitted during the study.One (2.0％) case was proven diagnosis ; 24 (47.1％) were probable diagnosis and 26(51.0％) were possible diagnosis.The using of immuno-suppressors and corticosteroids,and the presence of graft-versus-host disease (GVHD) were the main host factors.The patients with two or more host factors simultaneously accounted for 66.7％ (34/51) of all pulmonary IFI patients.Totally 94.1％ (48/51) of the patients with pulmonary IFI presented nodules and/or patches as the main features in high resolution computed tomography (HRCT) scanning.The positive rates of fungal antigen detection were 58.6％ for G test and 33.3％ for GM test,which were relatively high.Twenty patients (39.2％) showed decrease of arterial partial pressure of oxygen and hypoxia in blood-gas analysis.Conclusions For the diagnosis of pulmonary IFI post allo-HSCT,the administration of immuno-suppressors and corticosteroids,and the presence of GVHD were the main host factors.Nodules and/or patches were the main features in HRCT image.Fungus antigen detection is the main tool to support clinical diagnosis.

Objective:To investigate the expression of MMP-1 and PTEN protein in basal cell papilloma (BCP), as well as their correlation with skin photoaging. Methods:Immunohistochemistry technique via Elivison method was employed to measure the expres-sion of MMP-1 and PTEN protein in lesions from 50 cases of BCP on exposed areas, 50 cases on non-exposed areas, and 30 normal controls. We compared the differences among the three groups and analyzed the result. A total of 90 BCP cases on exposed areas were randomly divided into three groups. Titanium dioxide cream and placebo were respectively applied in the trial groups twice daily for 12 weeks, whereas the control group was non-administered. After 12 weeks, the MMP-1 in the lesions of the three groups was measured and compared. Results:The expression scores of MMP-1 on exposed areas were significantly higher than those in the control group (P<0.01). No significant difference was found between non-exposed areas and the control group (P>0.05). The expression scores of PTEN protein on exposed areas and on non-exposed areas were significantly lower than that in control group (P<0.01). The expression scores of MMP-1 in the group that used titanium dioxide were evidently lower than those in control group after 12 weeks (P<0.05). Conclu-sion:MMP-1 is overexpressed in BCP on exposed areas. PTEN protein is underexpressed in BCP of exposed areas and non-exposed ar-eas. Skin photoaging is a possible cause of BCP on exposed areas.

BACKGROUND:Adipose-derived mesenchymal stem cels have rich sources that are easily obtained, which can be used to treat acute myocardial infarction. OBJECTIVE: To investigate the therapeutic effect of adipose-derived mesenchymal stem cel transplantation on acute myocardial infarction in rats. METHODS:Rat models of acute myocardial infarction were made and subjected to adipose-derived mesenchymal stem cel transplantation in comparison with model and control (sham operation) groups. RESULTS AND CONCLUSION:Echocardiography findings showed significant improvement in the left ventricular end-systolic diameter, left ventricular end-diastolic diameter and ejection fraction in the cel transplantation group compared with the model group (P < 0.05). Hematoxylin-eosin staining showed that myocardial infarction was evident in the model group, in which, there were rarely viable myocardial tissues and few vessels in the infarcted region, but in the cel transplantation group, there were evident survived myocardial tissues and transplanted cels. The percentage of infarct size was significantly lower in the cel transplantation group than the model group (P < 0.05). Immunohistochemical staining showed that adipose-derived mesenchymal stem cels were able to survive in the infarcted myocardial tissues, and the expression of cardiac troponin T in the cel transplantation group was significantly higher than that in the model group (P < 0.05). Experimental data show that adipose-derived mesenchymal stem cel transplantation can protect the myocardial tissues after myocardial infarction, and effectively improve the myocardial function.

BACKGROUND:Liushen Pil is a traditional Chinese herbal formula, has the effects of heat-clearing and detoxicating, eliminating stagnation, detumescence and al eviating pain. Modern pharmacology verifies that Liushen Pil has anti-inflammatory, analgesic, cardiac, anti-viral, anti-tumor effects, and has been extensively used in the treatment of various infectious diseases and malignant cancer. OBJECTIVE:To investigate the inhibitory effects of Liushen Pil on esophageal cancer xenografts, and effects on microvessel density and vascular endothelial growth factor expression. METHODS:After reproducing nude mouse models of human esophageal cancer, 48 nude mice were randomly divided into high-dose Liushen Pil group, moderate-dose Liushen Pil group, low-dose Liushen Pil group, cisplatin group, model group and blank group. According to medication regimen, drugs were given. The growth of transplanted tumor of nude mice was dynamical y observed in each group. The nude mice were sacrificed after 20 days of treatment. Neoplasm weight was taken and the tumor-suppressing rate was calculated. Immunohistochemistry was used to detect microvessel density and the expression of vascular endothelial growth factor. RESULTS AND CONCLUSION:The weight of transplanted tumor was significantly lower in the high-dose Liushen Pil group, moderate-dose Liushen Pil group, low-dose Liushen Pil group, and cisplatin group than in the model group (P<0.05). Microvessel density and the expression of vascular endothelial growth factor were obviously lower in the each Liushen Pil group than in the model group, but not as apparent as that in the cisplatin group. Results suggested that Liushen Pil can inhibit the growth of the esophageal cancer xenografts. Liushen Pil can down-regulate the expression of vascular endothelial growth factor and reduce microvessel density, which is one of the tumor-inhibiting mechanism of Liushen Pil .

Objective To evaluate the feasibility and effectiveness of endoluminal grafting for the treatment of abdominal aortic aneurysms in high-risk patients with serious co-morbidities.Methods Endoluminal stent grafting was performed in fifty-one patients(45 males and 6 females,with a mean age of 71.6±7.5 years)with abdominal aortic aneurysms.Of all the patients,21(37.7%)were high-risk surgical candidates because of associated co-morbidities.These patients were classified in grade Ⅱ and Ⅲ according to the criteria assigned by the"Society for Vascular Surgery"and"International Society for Cardiovascular Surgery".Based on the preoperative CT and DSA findings,the appropriate stent was selected for every patient.Post-operative clinical observation and CT scan were regularly carried out,the occurrence of complications and the morphological changes of the aneurysms were observed.The results were evaluated and analyzed.Results Primary technical success was achieved in all patients(100%).No death occurred during the procedure or in 30 days after the procedure.An average follow-up period of(29.1±20.5)months was made.Minor endoleak was noted on CT scans in 10 patients,and the endoleak disappeared in 5 patients during the follow-up period.One patient died from unknown cause.The total mortality rate was 2.0%(1/51).The major complications rate was 9.8%(5/51),including stent thrombosis(n=2),thrombosis at femoral artery(n=1),lymphatic fistula at femoral incision(n=1) and stent dislocation(n=1).Conclusion Endoluminal stent grafting is a safe and feasible technique for the treatment of abdominal aortic aneurysms with excellent medium-term results.This technique is especially suitable for the patients with high surgical risk.