Objective　To evaluate the value of embolizing uterus artery in the treatment of serious obstetrical hemorrhage. Methods　Twelve cases with obstetrical hemorrhage, including postpartum, postcesarean, ectopic pregnant, and artifical abortional bleeding, were treated by embolizing uterus artery. Results　All of the 12 patients with obstetrical bleeding were successfully controlled. No serious complication happened. ConclusionThe treatment of obstetrical hemorrhage by emergently embolizing uterus artery was safe and effective.

Diffusion tensor imaging (DTI) and fiber tracking (FT) may show structural information about white matter fiber. With development of technology, the applications of the DTI and FT are widely used in spinal cord. DTI and FT are more sensitive than traditional MRI on detecting spinal cord lesions, able to provide more evidence for the diagnosis and differential diagnosis before treatment, as well as the evaluation for the prognosis.

AIM: To explore in vitro antioxidan activity of ChS extracted by two enzyme hydrolyses. METHODS: Papain,sodium hydroxide-trypsin were used to extract chondroint sulfate, respectively,DEAE-52 and DEAE-Sepharose FF ion exchange column chromatography were used to isolate and purify crude polysaccharide.RESULTS: The results showed that extraction rate of papain,sodium hydroxide-trypsin for chS was (39.51? 0.89 )%,and (21.23?1.65)%,respectively.DEAE-Sepharose FF was better than DEAE-52 for the isolation and purification of crude polysaccharide,two components were separated and purified from crude polysaccharide extracted by two extraction methods.Four components were separated and purified from crude polysaccharide extracted by papain on the DEAE-Sepharose FF.Three components were obtained by sodium hydroxide-trypsin.Molecular weight of ChS extracted by papain,sodium hydroxide-trypsin was 43569 Da,25773 Da,respectively.The DPPH?, ?OHand O~-_2? scavenging activity of the former was better than those of the latter. CONCLUSION: The study shows that the function of the ChS is probably related to extration mode,molecular weight and conformation.

Objective:To explore the protective effect of biochanin A(Bioch A) on lipopolysaccharide(LPS) -induced dopaminergic neurodegeneration. Method:An in vitro model of LPS-induced dopaminergic neurodegeneration was used to investigate the protective effect of Bioch A on dopaminergic neurons against LPS-induced neurotoxicity by measuring [3H] DA uptake and counting TH-immunoreactive cells. Microglia were visualized by staining for the CR3 complement receptor with monoclonal antibody OX-42. The production of nitric oxide(NO) was determined by measuring the accumulated levels of nitrite in the culture supernatant with the Griess reagent,and release of tumor necrosis factor-?(TNF-?) was measured by immunosorbent assay. The production of superoxide was determined by measuring the superoxide dismutase(SOD) -inhibitable reduction of cytochrome C. Results:BiochA dose-dependently attenuated LPS-induced decrease in dopamine(DA) uptake and the number of dopaminergic neurons in rat mesencephalic neuron-glia cultures. BiochA also significantly inhibited LPS-induced activation of microglia and production of TNF-?,NO and superoxide in rat mesencephalic neuron-glia cultures and microglia-enriched cultures. Conclusion:Biochanin A may protect dopaminergic neurons from LPS-induced injury and its effectiveness in inhibiting microglia activation may underlie one of the mechanisms.

Objective To isolate water-soluble neutral polysaccharides(NTPS) and acidic polysaccharides(ATPS) from tea,investigate their hypoglycemic effects,and elucidate the relationship between structure and activity.Methods Weak base macroporous anion-exchange resin D315 was used to isolate two kinds of tea polysaccharides NTPS and ATPS based on electric charge of tea polysaccharides.Their monosaccharide compositions were analyzed by gas chromatography and ion chromatography.NTPS and ATPS were further isolated by DEAESepharose FF.Molecular weights of the main fractions were analyzed by HPGPC.The model of diabetic mellitus was established by ip alloxan in mice.The blood samples were collected with tail vein puncture to determine blood glucose.The hypoglycemic activity between neutral and acidic polysaccharides was compared after ig tea polysaccharides for 12 d successively.Results Both NTPS and ATPS were(heteropolysaccharides.) NTPS was mainly composed of neutral polysaccharide and its main monopolysaccharide was D-galactose.NTPS contained 6.82% galacturonic acid.Whereas,ATPS was mainly composed of acidic polysaccharide and contained 33.02% D-galactose,whose neutral polysaccharide was mostly(L-)rhamnose,D-arabinose and D-galactose. The molecular weights of both two kinds of tea polysaccharides were less than 3?10~4.Continuous ig administration of NTPS and ATPS [200 and 400 mg/(kg?d)] for 12 d was found to depress glucose increases in alloxan-dependent diabetic model mice.Conclusion Two different structures of tea polysaccharides NTPS and ATPS are isolated by anion-exchange resin D315 firstly.Both tea polysaccharides show good hypoglycemic effect.

ObjectiveTo study X-ray and high resolution computed tomograghy(HRCT)features and tIleir relationship with pulmonary function test in pulmonary alveolar proteinosis(PAP).MethodsThe findings of X-ray and HRCT and the Resultsof pulmonary function tests in 19 patients with PAP were reviewed retrospectively.X-ray and HRCT scores were rated in the aspects of opacity density,extent,and severity.The relationship between the imaging scores and pulmonary function tests were determined.ResultsX-ray showed a symmetrical perihilar predominance appearance in patients with PAP.HRCT scan showed bilateral clear-defined pathchy areas of ground-glass opacity and interlobular septal thickening,a pattern commonly characterized as"crazy paving".Nineteen PAP respiratory function Resultswere:DLCO/Pred=(54.49±16.78)%,FEV1/FVC=(86.00±6.70)%.Chest radiographic extent score and severity score correlated with diffusing capacity(r=-0.661,P＜0.01,r=-0.475,P＜0.05).HRCT severity score was 16.47±5.26.Among all the HRCT scores,severity score correlated significantly with the presence of restrictive ventilatory defect and diffusing capacity defect(DLCO/Pred,r=-0.809,P＜0.01;FEV1/FVC,r=0.573,P＜0.05).ConclusionsIn patients with PAP,there Is close relationship between X-ray,HRCT findings and pulmonary function.HRCT correlates more closely with pulmonary function.

Objective To evaluate the application of embolic material, iron oxide nanoparticles?lipiodol?gelatin in the improvement of therapeutic effect of microwave ablation in vitrogelatin phantom model and in vivo VX2 renal tumors model. Methods After preparing new embolic material containing nano Fe2O3, in vitro model experiment was firstly conducted to verify the temperature distribution of the microwave ablation. Further verification was performed in bilateral renal VX2 tumors in rabbit model. A total of 10 (20 kidneys) New Zealand White rabbits bearing renal VX2 tumors were treated by renal artery embolization and CT guided microwave ablation, in which left kidneys were treated by material containing nano Fe2O3 in iodized oil and right kidneys were treated by renal embolization with super liquid iodized oil as a control. The same microwave ablation time and power were used for both kidneys. CT perfusion and histopathological examinations were performed to determine the renal perfusion parameters, tumor histopathology and tumor?related angiogenesis. Results In vitro experiments, when nano Fe2O3 was present in the local area at 1cm from the microwave needle at 20 and 60, the temperature reached(59.1 ± 1.7)° C, (95.5 ± 4.5)° C vs.(31.1 ± 2.5)and(45.6 ± 3.5)° C in the controls. Our present results strongly suggested that local nano Fe2O3 particles absorbed microwave and shielded microwave energy transferring to the surrounding tissue. Before and immediately after renal VX2 tumor embolization, blood flow significantly reduced from (31.4 ± 10.6) to (6.1 ± 9.9) ml · 100 ml-1 · min-1. Our pathology findings indicated nano Fe2O3?lipiodol-gelatin embolic agent stored in endovascular regions, while no penetration into the renal parenchyma happened. Conclusions This in vitro model and in vivo experiment suggest that the new embolic material containing nano Fe2O3 may help to improve heat efficiency of MWA microwave, and it is feasible to administer it through transcatheter arterial embolization approach for the microwave ablation therapy of kidney cancer.

Objective To assess the value of upper airway narrowing with MSCT under quiet respiration in patients with the obstructive sleep apnea-hypopnea syndrome (OSAHS). Methods CT scan of upper airway was performed in 63 patients with OSAHS during inspiration, expiration and quiet respiration respectively with 16-slice spiral CT. The state of the soft palate, the area of the smallest cross-sectional area of retropalatal and retroglossal space of the upper airway during the different respiratory phase were compared. The correlation between these dimensions and the polysomnography (PSG) results were analyzed. Results Some particular pattern of events occurred in 14 patients during the different phase of respiration, such as hooking of the soft palate, raising of the soft palate, artifacts, etc. These events occurred more often in the expiration phase. The cross-sectional area of the retropalatal space was the smallest during quiet breathing. There were statistically significant differences in the smallest cross-sectional area of retropalatal space among different phases of respiration (F=4.602, P＜0.05), also between inspiration and expiration, quiet breathing groups. No statistically significant difference was found between expiration and quiet breathing, nor in the smallest cross-sectional areas of retroglossal space among the three groups (P＞0.05). There was positive correlation between the smallest area of retropalatal space and LSaO_2 in quiet breathing and expiration groups (r=0.511, 0.300, P＜0.05). Conclusion MSCT scan of upper airway may be a better way to evaluate upper airway narrowing under quiet breathing when patients failed to carry out the required mode (keeping exhalation) or some undesirable events occurred.

Purpose In order to find out a means that can both meet clinical requirements and reduce radiation dosage in the diagnosis of malignant biliary obstruction, the study aims to evaluate the image quality and the radiation dose of low tube voltage enhanced CT (100 kVp) in displaying malignant biliary obstruction in metal stents. Materials and Methods Between January 2012 and March 2014, 9 patients with highly suspected recurrent occlusion after biliary stent procedure were admitted in Peking Union Medical College Hospital and underwent high resolution three-phase dynamic enhanced CT scan. The CT images on portal veinal phase were reconstructed through the curved planar reformation and the CT values of 184 slices were evaluated along the pathway of the biliary stent. The reconstructed image quality was analyzed when the tube voltage was 140 kVp and 100 kVp respectively, and the different tumor-to-liver contrast-to-noise ratio (CNR) for each lesion, mean image noise, and figure of merit (FOM) between the two data sets were also compared. Results As the tube voltage decreased from 140 to 100 kVp, image noise increased from (19.88±3.62) HU to (24.22±4.24) HU (P<0.001), CNR increased by 15% and FOM improved by 50%. Conclusion A low tube voltage CT technique (100 kVp) improves tumor-to-liver CNR and significantly reduces radiation dose, therefore it is valuable in the manifestation of malignant obstruction in metal stents.

Objective To discuss the clinical application of drainage for lung abscess by needle puncture under CT guidance. Methods 18 cases of lung abscess were drainaged by needle puncture under CT guidance, including direct aspiration by puncture needle 1-3 times (n=8) and retaining drainage tube continuously (n=10). Results 17 cases with this procedure were succeeded possessing success rate of 94.7%(17/18). The patients were followed up for 11-35 days with symptom relieving better obviously and the focus shrinkage or disappeared (n=16), the curative rate reached 88.9%(16/18). The main complication was pneumothorax with capacities of %(n=1).Conclusions The curative course of lung abscess can be shortened greatly by percutaneous needling drainage under CT guidance with mild trauma. The procedure is simple with high successful rate and less complication.