Objective:To use defibrillators calibration detection method, some problems could be find out and analyzed. Moreover, the quality safety of defibrillators calibration can be guaranteed. Methods:According to WSB 64-2003 verification regulation for cardiac defibrillators and cardiac defibrillator-Monitors, and the practical experience of effective detection methods, defibrillation analyzer verification can be used to detect the performance parameters of cardiac defibrillators. Results:In accordance with the effective test method, through regular check, not only can cardiac defibrillators risk be eliminated but also quality safety of clinical use and the life safety of patients will be safeguarded. Conclusion:The quality control can prevent medical accidents that caused by facility loses, at the same time, if we are pay attention to the daily maintenance, the defibrillator can be played a role in emergency time.

Objective To study the clinical curative effect of adefovir and lamivudine in the treatment of chronic hepatitis B .Methods 68 patients with chronic hepatitis B were randomly divided into the treatment group and control group,34 cases in each group.The treatment group was treated with adefovir and lamivudine for 48 weeks,the control group was treated by lamivudine for 48 weeks.12,24,36,48 weeks after treatment ,the changes of liver func-tion,ALT index in HBV DNA,HBV DNA and the changes of serum HBeAg negative rate ,HBeAg/HBeAb seroconver-sion rate and adverse reaction were observed and compared .Results With the extension of treatment time ,ALT,HBV DNA in the two groups were gradually decreased , there were significant differences before and after treatment ( t=4.63,4.65,P<0.05).24,36,48 weeks after treatment,ALT,HBV DNA in the treatment group were significantly lower than those in the control group[ALT (89.9 ±16.7) U/L,(60.1 ±13.8) U/L,(44.6 ±8.9) U/L vs (90.7 ± 17.6) U/L,(72.0 ±14.1) U/L,(61.3 ±24.5) U/L;HBV DNA (4.92 ±1.44) U/L,(3.35 ±1.37) U/L,(2.53 ± 1.31) U/L vs (5.02 ±1.41) U/L,(3.69 ±1.40) U/L,(3.02 ±1.35) U/L],there were significant differences between two groups(F=4.32,4.56.4.76,all P<0.05).After treatment,the HBV DNA and HBeAg negative con-version rate,HBeAg/HBeAb seroconversion rate in two groups were increased significantly ,the differences were statis-tically significant(χ2 =4.63,4.36,4.21,4.27,4,35,4.23,all P<0.05).At the 24th week of treatment,the serolog-ical markers of HBV had no significant difference , but after 24 weeks, serum markers in the treatment group (67.65%,32.35%,26.47%,85.29%,38.23%,35.29%) were obviously higher than those in the control group , the differences between the two groups were significant (χ2 =4.43,4.73,4.23,4.32,4.34,4.46,4.76,4.34,4.22, 4.29,4.34,4.45,all P<0.05).Conclusion Adefovir and lamivudine combination therapy in the treatment of chro-nic hepatitis B has obvious clinical effect ,has no serious adverse reactions ,which is suitable for clinical application .

Objective To study the relationship between overweight, obesity and blood pressure among children living in urban Beijing. Methods A total of 4 267 pupils aged 9～10 years were randomly selected. Overweight and obesity were defined by age and sex specific BMI classification reference for Chinese children. Hypertension was defined by age, sex and height specific reference for US children. Results The prevalence of overweight and obesity in boys was 19.4% and 21.2%, in girls was 10.9% and 12.1%, respectively. Mean levels of systolic blood pressure (SBP) and diastolic blood pressure (DBP) have significant different between all study group. The total prevalence of high blood pressure (HBP) was 16.1% for boys and 15.2% for girls, while it was 36.4% and 41.3% among obese boys and girls, respectively. The prevalence of high systolic blood pressure (HSBP), high diastolic blood pressure (HDBP)and HBP gradually increased as weight increased. Compared with the normal weight group, OR(95%CI) for HBP of overweight and obese children were 2.6 (2.1～3.3) and 5.8 (4.7～7.0), respectively. Conclusion Obesity is positive correlation with hypertension in children aged 9～10years of Beijing, and the risk of hypertension was increased with their body weight.

Objective To investigate the effect of Mahong decoction on serum VEGF and b-FGF of rat model bronchus asthma airway remolding. Method Forty SD rats randomly divided into four groups: blank group, asthma group, hormone group, Chinese medicine group. The asthmatic model was established by sensitization and challenge with ovalbumin, and the rats in the hormone group and Chinese medicine group conferred hormone and Chinese medicine before the challenge. ELISA was used to measure the level of serum VEGF and b-FGF. Results The serum VEGF and b-FGF in asthma group was higher than in other groups (P0.05). Conclusion Mahong decoction may control the level of serum VEGF and b-FGF of rat model of bronchus asthma airway remolding, which has the similar result with hormone.

Objective To analyze the prognostic factors for patients with hepatic encephalopathy (HE) in acute-on-chronic liver failure(ACLF).Methods A retrospective analysis was performed on 159 ACLF patients with HE.The hepatic encephalopathy was determined to baseline,the patients were divided into survivors(n =13) and nonsurvivors(n =146),The 32 factors affecting the prognosis were analyzed by Cox proportional hazard model with SPSS.Results One-month,three-month,and six-month survival rates were 20.13％,10.06％ and 8.18％,respectively.Cox regression analysis of prognostic factors showed that it could the stage of hepatic encephalopathy and HRS significantly improve the survival rate of the patients with HE in acute-on-chronic liver failure.The stage of hepatic encephalopathy and HRS could significantly decrease the survival rate of the patients(x2 =18.344,11.368,all P ＜ 0.05),elevated the levels of hepatic encephalopathy (relative risk (RR) =1.591) and HRS (RR =1.809) indicate worse prognosis with hepatic encephalopathy in acute-on-chronic failure.Conclusion The stage of hepatic encephalopathy and HRS were independent risk factor sof prognosis in acute-on-chronic liver failure.

Objectives To evaluate the influence of cardio-pulmonary bypass (CPB) to the endothelial function and lipid oxidative status of the Coronary Artery Bypass Grafting (CABG) patients. Methods Thirty-five coronary patients (female 5 cases, male 30 cases, mean age 59.5±8. 6 years) who needed CABG operation therapy were included. The control group consisted of 20 health volunteers (female 5 cases, male 15 cases, mean age 49. 5 ± 7.3 years).Blood samples were taken at preoperative, 3 and 7 days postoperative. Serum von Willebrand factor (vWF) level, one of the endothelial dysfunction markers,and oxidized low density lipid (OxLDL) level, one of the lipid oxidization status markers were detected with ELISA kits. Results The levels of vWF and OxLDL in CABG patients' serum were elevated significantly compared with those of control group ( 139.60% ± 34. 39% vs 82. 79% ±13. 89% and 63. 7 ±18. 9U/ml vs 25.4± 15.2U/ml respectively). Three and 7 days after CABG significant increases in the vWF level (194. 30% ±37. 74%; 181.07% ±31.05%vs 139.60% ±34.39% at baseline, P＜0. 0001, respectively) and OxLDL level (79. 3±26. 7U/ml; 72.4±23.1U/ml vs 63.7±18. 9U/ml at baseline, P＜0. 01, respectively) were detected. Conclusion Compared with normal people, the endothelial system of CABG patients is impaired, and their lipids are in a more oxidative status. CABG procedure with CPB can further deteriorate the conditions, which may imply that the patients are predisposed to acute coronary accident shortly are the procedure.

Objective To study the differential expression of apoptosis related genes in GJB2 gene conditional knockout mice (cCx26Pax2Cre ) cochlea membranous labyrinth ,and to explore the mechanism of GJB2 gene mutations causing deafness .Methods Two developmental stages of P10 and P18 were selected from the knock out mice and the wild type ones (BALB/C) .The total RNA was isolated from cochlear membranous labyrinth and PCR array was performed using mouse apoptosis PCR arrays .Results Compared with wild -type mice ,significant up or down -regulation in gene expression was detected in 16 genes in cCx26Pax2Cre ones at P10 .Of the 16 genes ,14 ones were down-regulated .Among the 14 genes ,9 ones can be classified as anti -apoptosis or pro -proliferation genes ,5 ones can be classified as pro -apoptosis or pro -inflammation genes .The other 2 genes expression was up-regula-ted ,and their main role was to promote apoptosis .Compared with time -matched controls ,significant up or down-regulation in gene expression was detected in 4 genes in cCx26Pax2Cre mice at P18 .Of the 4 genes ,3 ones expression was down-regulated ,were anti-apoptosis ones .The expression of the other one gene among the 4 ones was up-regulated ,which acted as pro -apoptosis genes .Bcl2l10 and Tnfrsf10b expression showed significant down or up -regulation at both stages . Compared with P10 , the expression of caspase - 8 was up - ragulated at P18 in cCx26Pax2Cre mice .Conclusion It is suggested that GJB2 mutation may up -regulate the expression of DR5 ,which can trigger the death receptor pathway to cause apoptosis in cCx 26Pax2Cre mice cochlea directly .At the same time , caspase-8 in death receptor pathway may activate the mitochondria pathway indirectly and amplify the apoptosis further in cCx26Pax2Cre mice cochlea .The final result of the above activated pathways is the wide range of cochlear cells apoptosis and the profound hearing loss in cCx 26Pax2Cre mice .

BACKGROUND: Twin-block appliance has been confirmed to efficiently change hard tissue and the profile of soft tissue.Whether a linear relationship exists between soft tissue and hard tissue changes remains unclear.OBJECTIVE: To evaluate the face convexity changes of soft and hard tissues after Twin-block appliance therapy and compare with controls.METHODS: Thirty-one class Ⅱ division 1 malocclusion subjects with hand-wrist radiographs in FG-G stage were selected.Among the 31 patients,17 received Twin-block appliance therapy,serving as experimental group,and the remaining 14 subjects abandoned treatment,serving as control group.Cephalometric radiographs of each included subject were taken prior to and after treatment or observation.Face convexity of soft and hard tissues,as well as the face convexity changes,was compared between the experimental and control groups.Linear regression equation was employed to analyze the linear association between soft-and hard-tissue changes.Regression equations of experimental and control groups were compared.RESULTS AND CONCLUSION: Prior to and after Twin-block appliance therapy,a significant correlation existed between the position changes of superior and inferior alveolar sockets relative to the nose and mandible,and the position changes of upper and lower lip pits relative to the nose and mandible,i.e.,there was a linear correlation between A-E change and Ss-E change,and between B-E change and Si-E change.The largest Pearson's correlation coefficient(0.839)appeared between Si-E change and B-E change,indicating the best correlativity between these two changes.Statistical analysis revealed that the linear equations of face convexity changes of soft and hard tissues after Twin-block appliance therapy were Si-E=0.745 B-E,Ss-E=0.276 A-E.These linear equations would be helpful to explain mandible growth and face convexity change after Twin-block appliance therapy and predict the prognosis of face convexity change.

Objective To investigate the effect of resveratrol on the proliferation and invasion of human pancreatic cancer PANC-1 cells. Methods Five groups including blank control group, 0. 1% dimethylsulfoxide (DMSO) group and resveratrol groups (50, 100, 200 μmol/L) were established. The proliferation of PANC-1 cells was detected by MTT assay. The apoptosis and cell cycle change were analyzed by flow cytometry. The invasive ability of PANC-1 cells was observed with a Transwell cell culture chamber. The expressions of Bax, Bcl-2,matrix metalloproteinases 2 (MMP-2) and 9 (MMP-9) of the PANC-1 cells were assayed by real-time quantitative PCR and Western blot. All data were analyzed using the analysis of variance. Results ( 1 ) The inhibition rate of resveratrol on the proliferation of PANC-1 cells was 0 in the blank control group, 3.25% ±0.42% in the 0. 1% DMSO group, 13.23% ± 1.68% in the 50 μmol/L of resveratrol group, 42.25% ± 3.20% in the 100 μmol/L of resveratrol group, and 56.94% ±5.31% in the 200 μmol/L of resveratrol group. There was a significant difference in the inhibition rate among the five groups (F=460. 10, P<0.05). (2) The apoptosis rate was 0.05% ±0.03% in the blank control group, 3.39% ± 1.77% in the 0. 1% DMSO group, 6.92% ± 1.85% in the 50 μmol/L of resveratrol group, 19.05% ± 2.01% in the 100 μmol/L of resveratrol group, and 27. 17% ±6.43% in the 200 μmol/L of resveratrol group. There was a significant difference in the apoptosis rate among the five groups (F = 38.84, P < 0.05). (3) There was no significant effect of 0. 1% DMSO on the cell cycle of PANC-1 cells. The number of PANC-1 cells in the G0/G1 and S phase was increased. (4) The average number of invading PANC-1 cells was 61 ± 13 in the blank control group, 54 ± 13 in the 0. 1% DMSO group, 48 ± 15 in the 50 μmol/L of resveratrol group, 23 ±6 in the 100 μ mol/L of resveratrol group and 18 ±7 in the 200 μmol/L of resveratrol group. There was a significant difference in the number of invading PANC-1 cells among the five groups (F = 69.08, P < 0.05 ). (5) There were up-regulated mRNA and protein expressions of Bax and down-regulated mRNA and protein expressions of Bcl-2, and the expressions of MMP-2 and MMP-9 of the PANC-1 cells were inhibited in the resveratrol groups. The changes of the protein expressions of Bax, Bcl-2, MMP-2, MMP-9 were consistent with the changes of the mRNA expressions of the four indexes. Conclusion Resveratrol can significantly inhibit the proliferation and invasion, as well as induce apoptosis of PANC-1 cells in vitro.

Objective To summarize the experience of nursing the patients with liver transplantation complicated with early portal vein thrombosis treated with post-embolectomic anticoagulation. Method The clinical data of 5 cases of liver transplantation-induced portal vein thrombosis treated with post-embolectomic anticoagulation was reviewed to summarize the curative effect , key points for disease conditions and anticoagulative nursing. Results The anticoagulative effect was not good in only one case. 4 other cases were recovered by embolectomy and postoperative anticoagulation therapy as well as related nursing measures. Conclusion The nursing measures such as close observation of the disease processing, early reasonable anticoagulation, accurate medication, prevention of patent complication are critical for preventing the recurrence of portal vein thrombosis after liver transplantation.