BACKGROUND: It is significant to establish a kind of effective, conve nient and reliable animal model of hypertension. At present, dogs, rats and rabbits are usually used to establish hypertensive models at home and abroad, and the renal artery stenosis induced hypertensive models are ex tensively used to research hypertension and its complication for human be ings because they are convenient and reliable, and there are many methods to establish them, but the effects are to be evaluated. OBJECTIVE: To establish convenient and reliable animal models of ex perimental renal artery stenosis induced hypertension. DESIGN: A randomized grouping design and animal experiment. SETTING: Institute of Cerebrovascular diseases, Medical College Hospital of Qingdao University. MATERIALS: The experiments were carried out in Shandong Key Labora tory for Prevention and treatment of Brain Disease from September 2005 to February 2006. Eighty-one healthy Wistar rats divided into 7 groups accord ing to the method of random number table: unilateral renal artery stenosis group (n=18), bilateral renal artery stenosis group (n=17), unilateral renal artery ligation group (n=15), bilateral renal artery ligation group (n=15), uni lateral renal artery stenosis sham-operated group (n=6), bilateral renal artery stenosis sham-operated group (n=4) and normal control group (n=6). METHODS: Unilateral renal artery stenosis group: Right renal artery was clamped with miniature silver clip, and left kidney was resected after 12 days. Bilateral renal artery stenosis group: Right renal artery was clamped with miniature silver clip, and the same treatment was given to the left side after 12 days. Unilateral renal artery ligation group: Right renal artery was ligated with filament, and left kidney was resected after 12 days. Bilateral renal artery ligation group: Right renal artery was ligated with filament, and the same treatment was given to the left side after 12 days. Unilateral renal artery stenosis sham-operated group: Right kidney was exposed, and returned to the original place without any treatment, and left kidney was resected af ter 12 days. Bilateral renal artery stenosis sham-operated group: Right kid ney was exposed, and returned to the original place without any treatment, and the same treatment was given to the left side after 12 days. Normal con trol group: The rats were not given any treatment. The blood pressure and heart rate were determined with RBP-2 hemomanometer for rats. MAIN OUTCOME MEASURES: The successful rate of model estab lishment, blood pressure and heart rate were observed. RESULTS: Totally 81 rats were used, and 61 of them died, all were in volved in the analysis of results without deletion. ① Blood pressures in the unilateral and bilateral renal artery stenosis groups and bilateral renal artery ligation group were obviously higher than those in the normal control group and bilateral renal artery stenosis sham-operated group [(138.0 ±36.5), (154.2±11.6), (160.5±0.7), (101.3±17.6), (108.3±5.7) mm Hg]. ② The changes of heart rate in the renal artery stenosis group were unstable, and the heart rates in the unilateral and bilateral renal artery stenosis groups, bilateral renal artery ligation group, normal control group and bilat eral renal artery stenosis sham-operated group were (367.5±47.2), (420.2 ±47.8), (386.0±4.2), (390.3±42.4), (417.3±27.5) beats per minute, respec tively. ③ The survival rates in the renal artery stenosis groups (22%, 29%) were significantly higher than those in the renal artery ligation groups (0,12%), and it was the highest in the unilateral renal artery stenosis group.CONCLUSION: The method of clamping bilateral renal arteries can establish stable rat models of hypertension induced by renal artery stenosis.

Objective To investigate the effect of a Chinese herbs mixture(Monkshood,ginger and licorice)on blood pressure(BP)and its possible mechanism in renovascular hypertensive rats.Methods 2K1C hypertensive rats received placebo(n=8)or Sinitung(n=8)by gavage for 2 weeks.BP was measured by tail-cuff.Plasma angiotensin Ⅱ(Ang Ⅱ)and calcium gene related peptide(CGRP)were examined by histochemical assay.Results Sinitang treatment significantly decreased BP(116.2?8.3 mm Hg vs placebo:131.6?14.2 mm Hg,P

Thirty patients with objective benign paroxysmal positional vertigo (BPPV) (objective group) and 30 patients with subjective BPPV (subjective group) visiting Department of Neurology from January 2014 to June 2015 were enrolled in the study.There were no significant differences in semicircular canal,gender,age,related factors of secondary onset (P ＞ 0.05).Patients were evaluated with dizziness handicap inventory (DHI) before and after the maneuver therapy.The average DHI subscale scores before treatment of all patients were higher than those after treatment (11.8 ± 2.8 vs.2.5 ± 1.8,P ＜ 0.05);there was 11.9 ± 3.0 vs.2.5 ± 2.1 (P ＜ 0.05) for objective group and 11.6 ± 2.6 vs.2.5 ± 1.6 (P ＜ 0.05) for subjective group.The scores of PI,F5,P11,P13,P25 (mean rank order value) after treatment were decreased compared to corresponding initial scores in two groups(objective group:21.30 vs.39.70,19.55 vs.41.45,19.00 vs.42.00,18.65 vs.42.35,15.90 vs.45.10,respectively,subjective group:20.93 vs.40.07,18.07 vs.42.93,19.77 vs.41.23,18.57 vs.42.43,16.47 vs.44.53,respectively;all P ＜ 0.05).The results indicate that maneuver therapy is effective both for objective and subjective BPPV patients;and subscale of DHI can be used to evaluate the degree of illness in patients with BPPV.

Objective To compare the safety and efficiency of nasogastric ( NG ) feeding with nasojejunal (NJ) feeding in treating severe acute pancreatitis ( SAP).Methods The terms NG tube,NJ tube,SAPand enteral nutritionwere used for literature search in PubMed , Embase, Cochrane Library, WanFang and CNKI databases and the publication deadline was June 1, 2016.Random effect model was used for Meta analysis .Results A total of 5 random clinical trials involving 264 patients ( 136 in NG group and 128 in NJ group ) were included .There was no statistical difference on the incidence of adverse events (mortality:RR=0.77, 95%CI 0.42~1.41, P=0.39; infection complications: RR=0.77, 95%CI 0.45~1.30, P=0.39; digestive complications: RR=1.26, 95%CI 0.73~2.16, P=0.41; stopping nasogastric proportion:RR=0.66, 95%CI 0.10~4.10, P=0.65;MODS rate:RR=0.98, 95%CI 0.71~1.35, P=0.90; the percentage of energy balance: RR=1.00, 95%CI 0.97~1.03, P=0.39 and the average length of hospital stay:RR=0.98, 95%CI 0.71~1.35, P=0.90).Conclusions NG feeding was safe and effective , which was comparable with NJ feeding .NG feeding was more convenient with a higher clinical value .

Objective To evaluate the clinical effects of combined therapy of Fuyuan Huoxue decoction and transcatheter hepatic arterial chemoembolization in the treatment of primary hepatic carcinoma. Methods 80 patients with primary hepatic carcinoma were randomly divided into a control group, treated by transcatheter hepatic arterial chemoembolization, and a treatment group, additionally treated by Fuyuan Huoxue decoction on the basis of the control group. By observing the change of gross tumor volume、tumor markers、clinical symptoms、Karnofsky Performance Status(KPS) score、quality of life and so on,compare the clinical effects and quality of life between the two groups. Results The effective rate of solid tumor was 47.50%and 35%in the treatment and the control group respectively, with no significant difference(χ2=-1.229, P>0.05);The total effect rate was 87.50%and 32.50%in the treatment and the control group respectively, with significant difference(χ2=-5.633, P<0.05);The rate of patients merged with portal vein tumor thrombus whose cancer embolus narrowed more than 1/2 after the treatment was 78.95%and 33.33%in the treatment and the control group respectively, with significant difference(χ2=7.836, P<0.05);The rate of alpha fetoprotein(AFP) decreasing or turning negative was 78.95%and 37.83%after the treatment in the treatment and the control group respectively, with significant difference(χ2=-3.857, P<0.05);Both groups have improvement in Karnofsky Performance Status(KPS) score after the treatment, the ratios was 80% and 72.50% in the treatment and the control group respectively, with no significant difference(χ2=-1.203, P>0.05);The accumulated scores change of quality of life(QOL) has asignificant difference(χ2=-3.025, P<0.05) between the two groups after the treatment. Conclusion The combined therapy of Fuyuan Huoxue decoction and transcatheter hepatic arterial chemoembolization can alleviate the clinical symptoms, improve treatment effects and quality of life of patients with primary hepatic carcinoma.

OBJECTIVE:To compare the therapeutic effect of surgical approach that should be used for posterior interbody fusion,posterolateral fusion with or without lumbar interbody fusion for adult spondylolisthesis.METHODS:From January 2004 to May 2008,75 patients with adult spondylolisthesis were retrospectively analyzed,comprising 22 males and 33 females,aged 53.3 years (ranging 49-70 years).There were 47 cases in L4,28 in L5;5 cases of degree Ⅰ,24 of degree Ⅱ,37 cases of degree Ⅲ,and 9 of degree Ⅳ.A total of 21 patients were treated with pedicle screw fixation and posterolateral lumbar fusion (group A),26 with pedicle screw fixation and posterior lumbar interbody fusion using cage (group B),and 28 with pedicle screw fixation and posterolateral lumbar fusion with posterior lumbar interbody fusion using cage.The satisfaction rate and fusion rate were compared among the three groups.RESULTS:All 75 patients were followed up for 6 months 3 years.The fusion rate of group A was 57%,and the satisfaction rate was 62%;the fusion rate of group B was 85%,and the satisfaction rate was 89%;the fusion rate of group C was 89%,and the satisfaction rate was 93%.There were no significant differences in the satisfaction rate and fusion rate between groups B and C (P>0.05),but the satisfaction rate and fusion rate of groups B and C were superior over group A (P<0.05).CONCLUSION:Posterior interbody fusion and posterolateral fusion with lumbar interbody fusion display similar treatment effects,which are better than posterolateral fusion.

In order to investigate in greater detail the two methods based on Hertz model for analyzing force-distance curve obtained by atomic force microscopy, we acquired the force-distance curves of Hela and MCF-7 cells by atomic force microscopy (AFM) indentation in this study. After the determination of contact point, Young's modulus in different indentation depth were calculated with two analysis methods of "two point" and "slope fitting". The results showed that the Young's modulus of Hela cell was higher than that of MCF-7 cell,which is in accordance with the F-actin distribution of the two types of cell. We found that the Young's modulus of the cells was decreased with increasing indentation depth and the curve trends by "slope fitting". This indicated that the "slope fitting" method could reduce the error caused by the miscalculation of contact point. The purpose of this study was to provide a guidance for researcher to choose an appropriate method for analyzing AFM indentation force-distance curve.
Actins ; Elastic Modulus ; HeLa Cells ; cytology ; Humans ; MCF-7 Cells ; cytology ; Microscopy, Atomic Force

Objective A prospective randomized controlled trial was carried out to explore the best time of In-domethacin suppositories administration for the prevention of post-ERCP pancreatitis in high-risk groups. Methods 81 patients were enrolled in the study finally. Patients were randomized into group A (100 mg rectal Indomethacin suppositories was administrated immediately after ERCP), group B (100 mg rectal Indomethacin suppositories was administrated half an hour after ERCP) and group C (ERCP alone group, which did not give Indomethacin supposito-ries). The level of serum amylase, urine amylase, serum CRP, serum IL-6, serum TNF-α were measured before, 3 h, 24 h and 48 h after ERCP, and the incidence of PEP and hyperamylasemia were analyzed. Results There was 1 case (4.00%) of PEP in group A, 2 cases (5.41%) of PEP in group B and 5 cases (26.31%) of PEP in group C;the incidences of PEP of group A and group B were significant lower than that in group C (P < 0.05). There was 1 case (4.00%) of hyperamylasemia in group A, 5 cases (13.51 %) of hyperamylasemia in group B and 6 cases (31.6 %) of hyperamylasemia in group C, and the incidences of hyperamylasemia of group A and group B were significant lower than that in group C ( P< 0.05). Conclusion Administration of 100 mg Indomethacin suppositories immediately or half an hour after ERCP can effectively reduce the incidence of PEP and hyperamylasemia.

Objective To investigate the imaging features of sarcomatoid carcinoma(SC)of lung on chest radiography and CT and to improve knowledge of SC.Methods The chest plain films,CT images and clinical data of all 7 cases of pathologically proved lung SC were retrospectively analyzed.Results All cases presented with a spheroid solid lung mass ranged from 3 to 11 cm in diameter(average 7 cm).All the lesions were located in middle and lower fields of the lung:3 lesions in right lower lobe,2 in right middle lobe,and the other 2 in left lower lobe.Among the 7 cases:6 cases were of peripheral type and 1 case was of central type.The peripheral-typed lesions of 5 cases had clear margin and 3 of them were lobulated.Three massess were homogenous in density,and the other 4 were inhomogeneous in density with formation of central cavity or calcification.After intravenous contrast administration.Three lesions showed homogeneous enhancement,and the other 4 lesions had inhomogeneous enhancement.The lesions with diameter larger than 6 cm showed marginal or patch-like enhancement.Five cases had pleural or chest walls invasion.Two cases had mediastinal lymph nodes metastases.One case had multiple remote metastasis.Conclusion There are some relatively specific features of lung SC on chest radiography and CT,which may be helpful for diagnosis.

Objective To determine the effect of moderate hypothermia on coagulation in patients with severe traumatic brain injury (sTBI) and investigate the clinical significance of thrombelastogram (TEG) monitoring.Methods Seventy-five patients with sTBI were randomly assigned to hypothermia group (conventional treatment + moderate hypothermia within 24 hours posttrauma,n =38) and control group (conventional treatment alone,n =38).TEG aided in monitoring coagulation function by measuring clot reaction time (R),clot formation time (K),clotting rate (α),maximal amplitude (MA),and percent fibrinolysis at 30 minutes after MA (LY30).Meantime,the intracranial pressure,vital signs,blood gas values,and blood electrolytes were also measured.Outcome was evaluated by using Glasgow outcome scale (GOS).Results The two groups were similar on admission with respect to R,K,α,MA,and LY30 (P ＞ 0.05),but the coagulation index in hypothermia group was significantly different from that in control group at days 1,2,3 and 7 posttreatment (P ＜ 0.05).Moreover,moderate hypothermia therapy demonstrated decrease of intraeranial pressure (P ＜ 0.01),with no severe complications,low mortality and improved outcome in comparison with control group.Conclusion Moderate hypothermia improves the hypercoagulability in patients with sTBI without increasing the risk of hyperfibrinolysis and protects brain tissue by decreasing intracranial pressure.