Objective To investigate the effect and mechanism of compound glycyrrhizin on airway inflammation in asthmatic rats. Methods Forty wistar rats were randomly divided into health group (group Ⅰ), asthma group(group Ⅱ), treating group (group Ⅲ) and treating control group (group Ⅳ) (n=10 in each group). Group Ⅱ, group Ⅲ and group Ⅳ received intraperitoneal injection of ovalbumin (OVA) and aluminum hydroxide gel for sensitization and OVA aerosol by ultrasonic nebulization for challenge, in addition, group Ⅲ re-ceived intraperioneal injection of 200 μg of compound glycyrrhizin 1 hour before OVA aerosol challenging every time, and group Ⅳ were in-jected with normal saline instead of compound glycyrrhizin. Group Ⅰ were injected and nebulizated with normal saline instead of OVA and alu-minlum hydroxide. All rats were sacrificed at the 6th hour after the last challenging, venous blood and bronchoalveolar lavage fluid(BALF) were collected, the IgE in venous blood were determined and the concentration of IL-4, IL-5, IL-13 and IFN-γ in BALF were detected, the cells in BALF were counted and detached. Results The concentration of IgE, IL-4, IL-5, IL-13 and the count of neutrophilic granulocytcs, lymphocytes, cosinophils in group Ⅱ were significantly higher than those in group Ⅰ and group Ⅲ(P<0.01), and the concentration of IFN-γ in group Ⅰ and group Ⅳ were significantly lower than those in group Ⅰ and group Ⅲ(P <0.01). There was no significant difference be-tween group Ⅱ and group Ⅳ(P >0. 05). The concentration of IgE, IL-4, IL-5, IL-13 and the count of neutrophilic granulocytes, lympho-cytes, cosinophils in group Ⅲ were higher than those in group Ⅰ, and the concentration of IFN-γ and the count of mononucleat macroplile cells in group Ⅲ were lower than those in group Ⅰ, but there were no significant difference(P>0.05). Conclusion Compound giycyrrhiz-in alleviated the airway inflammation and reduced the airway hyperresponsiveness in asthmatic rats, which mechanism may be related to regu-lating the balance of Th1/Th2 cytokines, suppressing the immune ability of Th2 and promoting the immune ability of Th1.

Objective To analyze the motion, elastic and derived parameters of normal common carotid artery (CCA) wall in short-axis orientation with velocity vector imaging (VVI) technique. Methods Two-dimensional dynamic images of CCA in 40 healthy volunteers people were obtained in short-axis view with Siemens Acuson Sequoia 512 color Doppler ultrasound. The motion, elastic and derived parameters were analyzed in right CCA including 6 segments: Anterior wall, posterior wall, anterolateral wall, anterior internal wall, posterolateral wall and posterointernal wall. Relationship between these parameters and the influencing factors were analyzed as well. Results There was no statistical difference of the elastic parameters among 6 walls (P>0.05). Some of the motion parameters of the lateral wall and anterior wall were higher than those of the posterior wall and internal wall (P<0.05). Age and intima-media thickness were negatively correlated with some elastic parameters and some motion parameters (P<0.05). Heart rate were positively correlated with some elastic parameters and some motion parameters (P<0.05). Elastic parameters were positively correlated with motion parameters (P<0.05) and positive correlation was found between time to peak of elastic and motion parameters (P<0.05). Conclusion VVI is an effective technique for observing CCA mechanical characteristics of the movement in normal human, and has potential for studying some of related factors of the characteristics.

Object To study the chemical constituents of Dracaena cochinchinensis (Lour.) S. C. Chen. Methods The constituents were isolated on silica gel chromatography, preparative TLC, and spectral data. Results Six compounds were isolated and identified from the resin of D. cochinchinensis as: 1, 2, 4, 5-tetrachloro-3, 6-dimethoxybenzene (Ⅰ), cholest-4?-methyl-7-en-3?-ol (Ⅱ), cholest-4?-methyl-7-en-3-one (Ⅲ), hexacosane (Ⅳ), cholest-7-en-3?-ol (Ⅴ), cholest-7-en-3-one (Ⅵ). Conclusion Compounds Ⅳ-Ⅵ were isolated from D. cochinchinensis for the first time.

Objective To investigate the characteristics and risk factors of occupationai exposure to bloodborne pathogens among health care workers (HCWs),and evaluate prevention and treatment countermeasures.Methods Record Form for Occupational Exposure to Bloodborne Pathogens Among Health Care Workers was used for retrospective survey on the occurrence of occupational exposure to bloodborne pathogens in a hospital between January 1,2013 and December 31,2015.Results A total of 246 cases of blood/body fluid occupational exposure occurred.The main occupational exposure population were nurses (n =95,38.62％);occupational exposure mainly occurred in wards(n =148,60.16％);the main mode of occupational exposure was sharp injury(n =219,89.02 ％);the main opportunity of occupational exposure of HCWs was surgical accident(n =69,28.05 ％);the main exposure source was hepatitis B virus(n =123,50.00 ％);none of HCWs developed infection after local treatment and prophylactic medication.Conclusion Medical institutions should strengthen the training for HCWs about occupational exposure to bloodborne pathogens,enhance protection awareness,standardize operation procedures,and improve working environment,so as to minimize the occurrence of occupational exposure.

Objective To investigate the value of ultrasound integrated backscatter (IBS) in quantitative analysis of in-traluminal thrombus in abdominal aortic aneurysm (AAA).Methods IBS of intraluminal thrombus in 29 patients were measured,including All (average image intensity) and SDI (standard deviation of image intensity).Meanwhile,different echoes and characteristics of IBS in thrombus were compared and pathologic analysis was performed.Results ①Individual All value of homogenous thrombus differed remarkably,SDI value was low.There was no significant difference about All in homogeneous group and adjacent cavity group (P>0.05).All and SDI value in adjacent wall group were higher than those in other groups (P<0.01).②According to pathologic analysis,cellulose contents were abundant in adjacent wall group,but fewer in adjacent cavity group and homogeneous group.Conclusion IBS might be regarded as a sensitive and specific method and a quantitative basis for estimating and predicting the rupture risk of AAA.

Background Clinical work found that triamcinolone acetonide (TA)bleeding during vitrectomy in proliferative diabetic retinopathy (PDR),but its mechanism is not clear.Objective This study was to explore the anastalsis of TA in vitrectomy for PDR.Methods A prospective study was performed.Twelve eyes of 12 patients who received vitrectomy combined with the intraocular use of TA for PDR were in cluded in Tianjin Medical University General Hospital from 2011 to 2014 and served as TA group.Thirty-two eyes of 32 patients who underwent vitrectomy for epimacular membrane or macular hole were enrolled as control group.The vitreous specimens of 0.6 ～0.8 ml was collected during the surgery.The concentrations of urokinase plasminogen activator (u-PA),tissue plasminogen activator (t-PA) and plasminogen activator inhibitors 1 (PAI-1) in vatreous were measured by ELISA.Results The mean contents u-PA,t-PA and PAI-1 in the vatreous were 25.45,127.44 and 0.42 ng/ml respectively in the TA group,and those the mean contents in the control group were 22.94,142.37 and 0.27 ng/ml respectively,shouwing a significant difference between the TA group and the control group (Z=-2.268,P＜0.05).NO significant difference was found in vitreous t-PA and PAI-1 between TA and control groups (Z =-0.092,-1.847,both at P＞0.05).Conclusions Vitreous u-PA content is increased in PDR eyes,which is more likely to lead bleeding.Anastalsis of TA during vitrectomy for PDR may be relatived to decreasing vitreous t-PA and u-PA contents as well as increasing PAI-1 contents.

Objective To investigate the clinical effects and indications of the vacuum sealing drainage (VSD) in the treatment of severe diabetic foot gangrene.Methods We randomly recruited 60 cases,who had suffered from diabetic foot gangrene(DFG) at the grade of 3 -5,according to Wagner scale into VSD treatment groups and treated them with VSD methods.At the same time,62 DFG cases who had given routine drainage treatment one year ago were retrospectively analyzed as control group.The observed items included the wound healing time,number of dressing,outcome of treatment ( healing rate),the average days in hospital,total expenses of hospitalization and so on.Results The wound healing time of VSD treatment group and routine treatment group were ( 30.5 ± 6.8 ) days and ( 53.8 ± 5.5 ) days,respectively ( t =2.636,P ＜ 0.01 ).The numbers of dressing were( 15.0 ± 4.7) days and ( 29.5 ± 6.1 ) days,respectively ( t =2.374,P ＜ 0.01 ).The healing rates were 96.7％ (58/60) and 87.1％ (54/62),respectively(P ＜0.01 ).The average period in hospitalization were (20.1 ± 3.5 ) days and ( 36.5 ± 4.6 ) days,respectively ( t =2.564,P ＜ 0.01 ).Total expenses of hospitalization were(20 155.6 ± 153.8) yuan RMB and(41 465.5 ± 146.6) yuan RMB,respectively(t =2.873,P ＜0.01 ).All the differences were statistically significant.Conclusion The VSD method is effective for the treatment of severe diabetic foot gangrene(DFG).It is able to reduce the time of wound healing significantly,increase the healing rate,shorten the hospitalization period and cut the general expenses during hospitalization.It' s an effective method for the treatment of DFG.

Objective To evaluate the effectiveness of a comprehensive hypertension management. Methods Hypertensive patients aged≥35 years in the Zhengfei community of Zhengzhou were selected. The patients were randomly assigned to the intervention and control groups. Those in intervention group received comprehensive hypertension management from October 2015 to September 2016,whereas those in the control group received the original management mode. Scales to assess blood pressure control, biochemical indexes, unhealthy lifestyle, and cardiovascular disease associated risk level were used to evaluate the effectiveness of the management modes.Results Each study groups had 1 051 patients.There were no significant differences in the baseline data of the two groups (P>0.05). At the end of 1 year of receiving the respective hypertension management modes, each group had 941 patients. Findings revealed that after receiving the comprehensive hypertension management mode, the systolic and diastolic blood pressure in the intervention group decreased by(9.87±7.38)mmHg(1 mmHg=0.133 kPa)and(6.33±4.14) mmHg,respectively.Those in the control group decreased by(7.01±6.02)mmHg and(4.52±3.59)mmHg, respectively,statistically significant differences in the extent of reduction of blood pressure between the two groups (P<0.05). Further, the fasting plasma glucose, postprandial blood glucose, low density lipoprotein, serum creatinine,and microalbuminuria levels in the intervention group were significantly lower than those in the control group(all P<0.05).However,the intervention group exhibited a significant increase in the high density lipoprotein level as compared to the control group(P<0.05).There were no significant differences in the total cholesterol,triglyceride,urinary creatinine levels,and body mass index between the two groups(P>0.05), although they had decreased in both groups. After the 1-year management, these proportions of smoking,heavy drinking,high salt diet and need to exercise were 10.0%,3.7%,20.1%,and 48.9% in the intervention group, and 15.3%, 10.0%, 29.0%, and 54.3% in the control group. The proportions were significantly different between the two groups (P<0.05). After the 1-year management, these proportions of low,moderate,and high risk of cardiovascular disease were 13.3%,33.5%,and 53.2% in the intervention group, and 11.2%, 30.1%, and 58.8% in the control group, respectively, with statistically significant differences between the two groups (P< 0.05). After the 1-year management, the proportion of treated, controlled, and control-treated hypertension using medication was 100%, 65.1%, and 75.3% in the intervention group, and 39.5%, 60.3%, and 70.0% in the control group, respectively, with statistically significant differences between the two groups (P< 0.05). Conclusion The comprehensive hypertension management mode was effective in significantly improving the blood pressure and health condition of hypertensive patients.