Objective:To explore the effectiveness and safety of levosimendan treating severe decompensated heart failure (SDHF) .Methods :A total of 80 patients with SDHF caused by various caused were selected ,randomly and equally divided into levosimendan group and dobutamine group .Both groups received intravenous drip of corre‐sponding drug based on routine treatment ,and the course was 24h .After two weeks ,therapeutic effects were com‐pared between two groups .Results:After two weeks ,total effective rate of levosimendan group was significantly higher than that of dobutamine group (95.0% vs .72.5% , P= 0.005) .Compared with dobutamine group ,after two weeks , there were significant reductions in dyspnea status score [ (2.57 ± 0.80 ) scores vs . (1.89 ± 0.70 ) scores] ,general status score [(3.23 ± 0.65) scores vs .(2.95 ± 1.29) scores] ,respiratory frequency [(24.32 ± 0.98) times/min vs .(20.6 ± 1.58) times/min] and level of brain natriuretic peptide [(1584 ± 325.63) mg/ml vs .(1011.92 ± 302.31) mg/ml] ,and significant rise in left ventricular ejection fraction [(40.16 ± 4.85)% vs .(46.53 ± 3.37)% ] in levosimendan group , P<0.05 or <0.01. Conclusion:In short-term therapeutic effect on severe decompensated heart failure ,levosimendan is superior to dobutamine ,it possesses good safety and tolerance ,which can be used as an effective drug for severe decompensated heart failure .

Objective To investigate the similarity and difference in chronic obstructive pulmonary disease ( COPD) evaluation and drug selection that were compared between global initiative for chronic ob-structive lung disease (GOLD) 2011 and GOLD 2006, and to explore treatment adherence by doctors ac-cording to GOLD 2011.M ethods We collected 224 patients with COPD from Department of Respiratory Medicine at the Second Xiangya Hospital to investigate the differences in COPD evaluation and drug selec-tion according to GOLD 2011 and GOLD 2006 with treatment adherence by doctors according to GOLD 2011.Results ⑴According to GOLD 2006, there were 38 patients in the most severe stage, which was different from that (Group D, 147) according to GOLD 2011 ( P <0.01).⑵The risk stratification by u-sing pulmonary function assessment was significantly different from that by using exacerbation history.⑶Symptom assessment by using COPD assessment test ( CAT) was significantly different from that by using modified British medical research council ( mMRC) .The kappa coefficient of these two questionnaires was 0.466, suggesting moderate agreement.⑷ According to GOLD 2011, 224 (100%) patients were recom-mended to use inhaled long-acting bronchodilators, which was higher than that (213, 95.18%) according to GOLD2006 ( P <0.01).⑸The level of appropriated actual prescription was 161 (71.9%) according to GOLD 2011, which was significantly different from that (120,53.1%) according to GOLD 2006 ( P <0.01).Conclusions ⑴ Compared to GOLD 2006, GOLD 2011 categorized more patients into the most severe group.⑵The risk stratification of COPD by airflow limitation severity or exacerbation risk was not i-dentical.Discordance between CAT and mMRC was observed.⑶GOLD 2011 recommends a wider range of using long-acting bronchodilators.⑷The adherence to GOLD guideline in our hospital is still far from satis-faction.

Objective To evaluate the value of TruviewTM EVO2 optical laryngoscope for emergency endotracheal intubation in the clinical application.Methods Forty-four patients in need for emergency endotracheal intubation were randomly (random number) divided into two groups:the observation group (TruviewTM EVO2 optical laryngoscope for tracheal intubation,n =22) and the control group (ordinary laryngoscope for tracheal intubation,n =22).Parameters recordered included C/L (Cormack-Lehane)grade,the time taken for successful intubation,tracheal intubation times,lowerest SpO2 during the intubation and the incidences of complications after intubation.IDS (intubation difficulty scale) scores were calculated and the total effective rates were compared.Results The data showed that there were no significant differences in the duration of the successful endotracheal intubation attempts between the two groups,respectively (24.04 ±6.56) s and (21.97 ±8.92) s,P ＞0.05.The C/L grade with the observation group was 10∶ 9∶ 3∶0 (Ⅰ ∶ Ⅱ ∶ Ⅲ∶ Ⅳ),which was significantly better than that with the control group (3∶ 7∶ 9∶ 3,P ＜0.01).The tracheal intubation times of the observation group was 17∶ 5∶0 (one time∶ two times∶ three times),which was significantly better than that of the control group (9∶ 8∶ 5,P ＜0.01).The minimum of SpO2 in the observation group (97.31 ± 1.64)％ was significantly higher than that in the control group (92.03 ± 5.39)％,(P ＜ 0.01).The incidence of complications after intubation was lower in the observation group.The IDS score in the observation group (0.68 ± 0.38) was much lower than those in the control group (2.54 ± 1.49),(P ＜ 0.01).In addition,the total effective rate of the observation group (86.36％) was significantly higer than that in the control group (45.45％),(P ＜0.01).Conclusions Using optical laryngoscope for emergency endotracheal intubation could facilitate the glottis exposure and reduce C/L grade effectively.It could lead to lower the incidence of complications and increase the success rate of tracheal intubation.

Objective The aim of this randomized,double-blind,placebo-controlled trial was to evaluate the efficacy of the Saccharomyces boulardii (S.boulardii) power in preventing antibiotic-associated diarrhea (AAD) in hospitalized children with pneumonia.Methods Two hundred and forty-five hospitalized children with pneumonia were randomly divided into two groups,group 1 treated with antibiotics and S.boulardii power (n =104),and group 2 with antibiotics and placebo,along with S.boulardii power and zinc when suffered from diarrhea (n =141).All children received montmorillonite powder and fluid replacement therapy for diarrhea.The stool frequency and consistency were observed.Diarrhea incidence,diarrhea and pneumonia duration of treatment,and therapeutic effect were recorded.Results AAD is more prevalent in group 2 than in group 1 (P ＜0.05).A 55.7％ relative risk reduction in AAD was seen in group 1 compared with group 2 (RR =0.443,95％CI 0.233 ～ 0.845,P =0.012).Patients with preventive treatment of S.boulardii power in broup 1 had lower AAD incidence compared with those in group 2 (P ＜ 0.05).Both the diarrhea and pneumonia duration of treatment in group 1 were shorter than that in group 2(P =0.001 for diarrhea duration,P =0.030 for pneumonia duration,respectively).No drug related adverse reactions were found during the observation period.Conclusion Preventive use of S.boulardii power may effectively reduce the risk of AAD,improve therapeutic effect,and shorten hospital stays for hospitalized children with pneumonia.

BACKGROUND:Studies have shown that chitosan and other natural polysaccharides have heparin-like anticoagulant function after sulfonated modification. Sulfonated chitosan has good anticoagulant property because the sulfonate group formed by sulfonated chitosan is similar with the active group of heparin. OBJECTIVE: To prepare the anticoagulant chitosan nanoparticles and to detect its morphology, physical and chemical properties and biological security. METHODS: Chitosan nanoparticles were synthesized by emulsion-chemical cross link. Sulfonated chitosan nanoparticles were synthesized by sulfonation reaction. Its morphology was described by transmission electron microscope. The peak-value change of its specific groups was observed by infrared spectroscopy. (1) Coagulation experiment: Heparin, chitosan nanoparticles and 10, 30 and 50 mg of sulfonated chitosan nanoparticles were added into the blood of Spraque-Dawley rats. The coagulation indicators were detected. (2) Hemolysis experiment: deionized water, physiological saline and 10, 30, 50 g/L sulfonated chitosan nanoparticles extracts were added into 2% red blood cel suspension of rabbits. The hemolysis rate was detected. (3) Cytotoxicity experiments: DMEM medium containing fetal bovine serum and 10, 30, 50 g/L sulfonated chitosan nanoparticle extracts were used to culture human umbilical vein endothelial cels. Cel relative growth rate and toxicity grading were detected after 72 hours. RESULTS AND CONCLUSION: Scanning electron microscopy showed that sulfonated chitosan nanoparticles had good morphology, with a diameter of 50 nm. Infrared spectroscopy showed that the sulfonated replacement occurred.In vitro coagulation experiments showed that sulfonated chitosan nanoparticles had significant anticoagulant effects in a dose-dependent manner. Sulfonated chitosan nanoparticles meet the national safety standard for hemolysis rate of less than 5%, non-induced hemolysis property. Cytotoxicity assays showed that sulfonated chitosan nanoparticles extracts had no significant cytotoxicity, and its biological safety was in line with the national standards.

Objective To construct humanized monoclonal antibodies against CD 20 and check their affinity to CD 20 antigen and their anti-tumor activity.Methods Based on the computer model , human IgG1 candidates closest to rituximab in crystal structure were selected in the Protein Data Bank ( PDB) .With the selected human IgG 1 candidates as the frame , we modified and transplanted the complementarity determining region ( CDR) of rituximab .First,the target gene fragments were obtained by overlapping PCR.Then, the sequences of the light chains(L) and the heavy chains(H) were inserted in-to the pcDNA3.3 and pOptiVEC vectors.Next, the constructed clones were transfected into 293F cells through transient transfection.After a large-scale cell culture, the mAb was purified by affinity chromatography rProtein A column.The puri-ty and expression level of the humanized antibodies was tested by sodium dodecyl sulfate ( SDS)-polyacrylamide gelelectro-phoresis(PAGE).The affinity of the humanized antibodies to CD20 was assessed with Fortebio assay.Finally, the anti-tumor activity of the constructed antibodies was detected by checking the tumor growth inhibition of the nude mice transplan-ted with tumor .Results Three humanized monoclonal antibodies against CD 20 were expressed and purified successfully . In reducing SDS-PAGE, the antibodies exhibited two bands of approximately 25 ×103 and 55 ×103 , respectively.The band size of the antibodies matched the expected value.Fortebio assay revealed that the humanized antibodies could bind to CD20 with high affinity (rituximab:6.48 ×10 -9mol/L, L4H7:1.91 ×10 -9mol/L, L5H5:7.35 ×10 -10mol/L,and L5H7:1.91 ×10 -9mol/L).The tumor growth inhibition experiment showed that the anti-tumor activity of L5H7 mAb was better than that of rituximab .Conclusion Three humanized monoclonal antibodies against CD 20 have been successfully construc-ted and expressed.L5H7 mAb possesses high affinity for CD20 and a good ability to kill tumor cells.

Objective To investigate lymph node metastases in distal gastric cancer and its clinical significance. Methods From June 2006 to December 2007, 129 distal gastric cancer patients underwent radical gastrectomy with lymphadenectomy. Dissected lymph nodes were collected in groups, and histopathological studies were performed to detect lymph node metastasis. The relationship between lymph node metastasis and tumor parameters such as diameter, location, infiltrating depth, histological category,Borrmann typing was evaluated. Results Lymph node metastases was found in 80 out of 129 patients (62%). A total of 3295 lymph nodes were harvested with an average of 25.54 lymph nodes per patient,among those 889 lymph nodes were identified with metastasis. The metastasis rate was 18.60%, 48. 84%,37. 98%, 38. 76%, 44. 19%, 31.01%, 10. 85%, 14. 73%, 4. 65%, 1.55% and 0. 78% respectively in No. 1, No. 3, No. 4d, No. 5, No. 6, No. 7, No. 8a, No. 9, No. 11 p, No. 12a, No. 14v lymph node group.No. 3 and No. 6 group nodes were moat frequently invaded by metastasis. Conclusion This study provides the regular pattern of lymph node metastasis in distal gastric carcinoma patients undergoing radical gastrectomy and perigastric lymphadectomy which helps to guide lymphadectomy in terms of less trauma and favorite prognosis.

Objective To investigate the impact of optical coherence tomography(OCT) imaging on physician decision-making during primary percutaneous coronary intervention(PCI) in patients with ST-segment elevation myocardial infarction (STEMI). Methods From January 2016 to May 2017, OCT was performed in 100 cases pre- and post- primary PCI. The pathogenesis of myocardial infarction was determined and immediate effect of PCI evaluated by OCT. Clinical outcome during a 12-months follow up was analyzed. Results The data from 17 patients were excluded for further study due to poor OCT images quality. The rates of plaque rupture, plaque erosion, calcification nodules, stent malapposition and coronary spasm were 65.1％(54/83), 26.5％(22/83), 3.6％(3/83), 2.4％(2/83) respectively among the remaining 83 patients with sufficient OCT quality images. of the overall rate of stent malposition, tissue prolapse and incomplete stent expansion was 21.7％(18/83). The incidence of edge dissection was 19.3％(16/83), and among them 2 patients required treatment with stent implantation. Among the 17 patients without stenting:coronary spasm were found in 2 cases, thrombus overload in 1 case after thrombus aspiration, plaque rupture in 7 cases , plaque erosion in 4 cases and stent malposition in 3 cases. One patient died in hospital for cardiogenic shock and one patient had subacute stent thrombosis . There were no major adverse cardiac events occurred in the remaining patients during the (11.0±4.0) months of follow-up. Conclusions OCT can identify nonoptimal stent deployment in approximately one-fourth of STEMI patients undergoing primary PCI, thus providing preliminary guidance to the physician for further mangement.

Objective To investigate the first medical contact to balloon ( FMC2B) time in our center and to identify the influencing factors .Methods This is a retrospective study conducted in the heart center of Beijing Luhe Hospital . A total of 140 patients undergoing primary percutaneous coronary intervention ( PCI) were enrolled between July 2013 to September 2014.Demographic data , clinical risk factors and the emergency process were evaluated .All the patients were categorized into 2 groups including:the conformed group ( patients with FMC2B<120 min for non-PCI-capable hospital and <90 min for direct arrival at Luhe hospital, n=59) and the unconformed group (n=81).Multivariant regression aralysis was done to analyse factors influencing FMC 2B time.Results Among the enrolled 140 patients, 58 patients were initially seen in a non-PCI-capable hospital , 31 patients were directly sent to Luhe hospital by ambulance and 51 patients arrived by themselves.The median FMC2B time was 106.16 min (interquartile range [ IQR ]: 77.37 -165.52 min ) and 42.1% ( 59/140 ) of the patients achieved the current recommended FMC2B time.In a multivariate logistic analysis , FMC to electrocardiographic ( ECG) within 10 min ( OR=5.61 , 95% CI 1.91-16.88 ) , admission during normal working hours ( OR=5.11 , 95%CI 1.88-13.85 ) , patient′s education level of high school or above ( OR=4.16 , 95%CI 1.53-11.34 ) , awareness of heart diseases ( OR =2.58, 95% CI 1.13 -5.91 ) were predictors of improving FMC2B. Transfer for primary PCI (OR=0.37, 95% CI 0.15-0.92) increased FMC2B.Conclusions Less than half of the patients with primary PCI achieved the goal of guidelines′recommended FMC2B time.Initial ECG, admission during normal working hours , patient′s education level and awareness of heart diseases and transfer for primary PCI are the independent predictors of FMC 2B time.

Objective:To evaluate the efficacy and safety of Tuina(Chinese therapeutic massage)in the treatment of functional dyspepsia(FD)in children and adults. Methods:Related articles in PubMed,Excerpta Medica Database(EMBASE),Cochrane Library,Web of Science,China Biology Medicine Disc(CBM),Wanfang Academic Journal Full-text Database(Wanfang),China National Knowledge Infrastructure(CNKI),and Chongqing VIP Database(CQVIP)were collected.The retrieval time was from each database's start to March 2022.Two researchers independently screened the literature,extracted the data,and evaluated the risk of bias in the included studies.A meta-analysis was then performed using the RevMan 5.4 software. Results:A total of 19 clinical trials were included,9 of which encompassed studies on adults while 10 were on children with FD,comprising a total of 1961 patients.The findings of the meta-analysis showed that the effective rate of FD in children and adults treated with Tuina was significantly higher than that in the control group[risk ratio(RR)=1.15,95%confidence interval(CI)(1.09,1.21),P<0.001],[RR=1.13,95%CI(1.06,1.21),P<0.001].In addition,the effective rate of FD in children and adults treated with Tuina combined with other treatments was significantly higher than that in the control group[RR=1.14,95%CI(1.07,1.21),P<0.001],[RR=1.12,95%CI(1.02,1.24),P=0.02].In terms of single symptoms,Tuina improved epigastric burning sensation score in adults[standardized mean difference(SMD)=-0.41;95%CI(-0.79,-0.02);Z=2.08;P=0.04]compared with that of the Western medicine group.Compared with children treated with oral Chinese medications(CM)or Chinese patent medicine(CPM),children with FD demonstrated lower scores of epigastric pain[SMD=-0.38,95%CI(-0.56,-0.19);Z=3.96;P<0.001],postprandial fullness[SMD=-0.30,95%CI(-0.50,-0.10);Z=2.88;P=0.004],and early satiety[SMD=-0.26,95%CI(-0.47,-0.06);Z=2.54;P=0.01]after receiving Tuina combined with CM or CPM treatment.No adverse events were reported in the Tuina treatment group,and the follow-up indicated that the symptom scores in the Tuina group improved. Conclusion:Compared with the control group,both Tuina and Tuina combined with other treatments are shown to have better effective rates,lower incidence of adverse events,and better follow-up outcomes.The study results suggest that Tuina may be a clinically viable complementary therapy.However,due to limitations in the number and quality of the included studies,the above conclusions should be verified by further high-quality studies.