Objective To explore the relationship between blood pressure changes and prognosis in patients with acute stroke by ambulatory blood pressure monitoring. Methods 79 patients with acute stroke were divided into two groups: cerebral infarction group (n=42) and cerebral hemorrhage group (n=37). Blood pressure of patients in both groups was monitored, and the score of handicap was evaluated respectively on 30d after onset. Results (1)Blood pressure was elevated in 87.3% of the patients with stroke at acute stage and then lowered spontaneously. Compared with that of the 1st day after onset, blood pressure lowered significantly from [SBP (155.9?21.7), DBP (96.6?20.8) mmHg] to [SBP (147.6?17.2), DBP (85.6?13.6) mmHg] (P

Objective To select the aptamer to an extracellular soluble fragment of recombinant human TGF-? receptor Ⅱ (TGF-? RⅡ) in order to antagonize TGF-? effectively by using systematic evolution of ligants by exponential enrichment (SELEX). Methods Initial random RNA library was transcripted in vitro from ssDNA 5′-TAATACGACTCACTATAGGGAGGACGATGCGG-N60-CAGACGACTCCCCGA-3′; rhTGF-? RⅡ was used as target protein. Totally,selection of 8 times was carried out in SELEX experiment. Membrane binding assay was performed to detect the evolution of enriched RNA library; Electrophoretic mobility shift assay (EMSA) was done to determine the affinity between the selected nucleic acid sequence and TGF-? RⅡ. Results Evolution of the enriched RNA library along the increased affinity to TGF-? RⅡ was observed with the development of selection. Two types of dominant sequences were isolated and named as sequence A and sequence B. In membrane binding assay,both sequences A and B showed obvious affinity to TGF-? RⅡ. However,no retarded bands were seen in EMSA. Conclusion The affinity of sequences A and B to TGF-? RⅡ is beyond satisfaction. However,possible sequences with improved affinity to TGF-? RⅡ can be selected by post-SELEX on the basis of candidate sequences A and B.

Objective To observe the effect of electromyographic biofeedback combined with swallowing training on dysphagia after stroke.Methods Ninety-five patients with difficulty in swallowing after stroke were randomly divided into a treatment group (48 eases) and a control group (47 cases).The patients in the treatment group were provided electromyographic biofeedback and swallowing training; the patients in the control group received swallowing training only.The therapeutic effect was assessed with Kubota's drinking water test before treatment and 30d after treatment.Results Swallowing in both groups improved after treatment.The total recovery rate in the treatment group was 87.5％,and in the control group it was 68.0％,a significant difference.Conclusion Electromyographic biofeedback can improve the effectiveness of swallowing training after stroke.

Objective To evaluate the changes of ventricular synchrony in patients with acute myocardial infarction(AMI)before and after percutaneous coronary intervention(PCI)by speckle tracking imaging(STI).Methods Thirty patients with AMI were examined by traditional echocardiography and STI before and 5 d,1 month after PCI.Myocardial imaging of left ventricular apical long views and parasternal left ventricular short axis views were recorded and stored.The time to peak longitudinal systolic and diastolic strain rate(TS-SRL,TE-SRL)and to peak radial systolic and diastolic strain rate(TS-SRR,TESRR)were measured respectively.The differences of the maximum and minimum systolic and early diastolic peak time(TSL-diff,TER-diff)and the standard deviation(TSL-SD,TER-SD)in 18 longitudinal segments were calculated.And the differences and standard deviation of TS-SRR and TE-SRR(TSR-diff,TSR-SD,TER-diff,TER-SD)were calculated also.These parameters were compared before and after PCI.Results Compared with before and 5 d after PCI,the values of TSL-diff,TSL-SD,TEL-diff and TEL-SD in 1 month after PCI were decreased significantly(P＜0.01).TSR-diff,TSR-SD,TER-diff and TER-SD were decreased also and the differences had statistical significance(P＜0.01).The cardiac synchronized index and LVEF values showed good negative correlation.Conclusions The systolic and diastolic synchrony of left ventricle in AMI patients was abnormal.STI can evaluate left ventricular synchronized function and the changes before and after PCI to assess the effect of PCI.

Objective To investigate the transportation of chemico-biological particles(CBP) through the micropassage inside the human body in order to improve chemico-biological protection.Methods Dissipative particle dynamics (DPD) method was used to study CBP transportation through micropassages inside the human body.Results The Poiseuille flow could be ensured by imposing boundary conditions including pressure gradient and no-slip.The axial velocity between fluid particles and CBPs was well matched except the area close to the passage wall.However, CBPs tended to accumulate and the density of CBPs slightly increased, leading to the jam effect and producing particle accumulation.Conclusion The characteristic of CBP transportation is better understood,which can help develop some chemico-biological protection devices according to movement of CBPs and improve the performance of CBPs during chemico-biological protection.

Objective To investigate the influence of combined thrombolysis therapy on clinical effects for short -and long -term of patients with acute cerebral infarction caused by sudden occlusion of anterior and posterior circulation.Methods 75 patients with cerebral infarction caused by sudden occlusion of anterior and posterior circulation were chosen and divided into A group (46 patients)with sudden occlusion of anterior circulation and B group (29 patients)with sudden occlusion of posterior circulation by comprehensive therapy for intra -arterial thrombolysis combined with mechanical crushing and dilation.The recanalization rate,the excellent and good rate of ADL -Barthel score,NIHSS score and GCS score before and after treatment,intracranial hemorrhage rate and mortality rate of two groups were compared.Results The recanalization rates of A group and B group were 50.00%(23 /46), 89.66%(26 /29).After treatment,the excellent and good rates of ADL -Barthel score of A group and B group were 58.70%(27 /46),62.07%(18 /29).The recanalization rate of B group was significantly higher than A group(χ2 =7.44,P <0.05).There was no significant difference in the excellent and good rate of ADL -Barthel score after treatment between the two groups(χ2 =1.21,P >0.05).After treatment,the NIHSS scores of A group and B group were (8.66 ±2.48)points,(8.72 ±2.51 )points,the GCS scores of A group and B group were (12.89 ± 3.61)points,(13.10 ±3.72)points.There were no significant differences in NIHSS score and GCS score after treatment between the two groups(t =1.47,1.52,all P >0.05).After treatment,the intracranial hemorrhage rate of B group was significantly lower than A group (χ2 =8.16,P <0.05 ).There was no significant difference in the mortality rate between the two groups(χ2 =0.98,P >0.05).Conclusion Compared with acute cerebral infarction caused by sudden occlusion of anterior circulation,combined thrombolysis therapy in treatment of patients with sudden occlusion of posterior circulation has advantages including higher recanalization rate and lower risk of intracranial hemorrhage.

Objective To evaluate left ventricular(LV)global and regional systolic function by three-dimensional speckle tracking imaging (3D-STI)in patients with systemic lupus erythematosus (SLE). Methods Twenty-two patients with SLE were selected randomly as SLE group and twenty-two healthy people were included as control group.3D-STI was performed in all participants to get global and regional strain parameters,including global longitudinal peak systolic strain(GLS),global circular peak systolic strain (GCS ),global radial peak systolic strain (GRS ),global area peak systolic strain (GAS ),segmental longitudinal peak systolic strain (SLS),segmental circumferential peak systolic strain (SCS),segmental radial peak systolic strain (SRS),and segmental area peak systolic strain (SAS).The sensitivity and specificity of GCS and GAS reflecting LV systolic function in patients with SLE were analyzed under the receiver operating characteristic (ROC)curve.Results ①The global strain:compared with the control group,GCS and GAS decreased significantly in SLE group (P <0.01),there was no significant change in GLS and GRS(P >0.05).②The regional strain:compared with the control group,the SCS in segments of basal anteroseptal,basal inferoseptal,mid anterior,mid inferosptal,mid anterolateral,apical inferior,apical lateral decreased significantly in SLE group.The SAS of basal anterior,basal inferoseptal,mid inferosptal, mid anterolateral,apical anterioe,apical lateral decreased significantly in SLE group (P <0.01).The SCS in segments of apex and the SAS of mid anterior,apical septal,apex decreased in SLE group (P <0.05).③The ROC curve:the sensitivity and specificity of GCS on detecting the LV systolic dysfunction were 59.1%and 87.5%,and those of GAS were 77.3% and 83.3%,respectively.Conclusions 3D-STI is a convenient and accurate way to early detect LV global and regional systolic dysfunction in SLE patients.

Magnetorheological fluid(MRF) is a sort of newly developed intelligent material.Because of the quick and adjustable magnetorheological effect of MRF,it is widely used in shock absorbers,clutches,polishing devices,hydraulic valves,etc.This paper mainly introduces magnetorheological fluid,magnetorheological effect,the work mode and characteristics of magnetorheological fluid shock absorbers as well as its application prospect in the wounded transport vehicle.

Since vibration highly influences the performance of vehicles, the effective improvment of vibration isolation has a great significance for enhancing the economy, balance, stability and reliability of vehicles. Based on the variable viscosity properties of magnetorheological(MR) fluids with the variation of a external magnetic flied resulted from adjustable and controllable electric current, a magnetorheological vibration isolator is developed. Through experiment and application, it is proved that the magnetorheological vibration isolator can highly increase vibration isolation efficiency.

Bilateral mandibular first molars of 36 rabbits were extracted.The tooth extraction wounds were treated by:platelet-rich fibrin +acellular dermal matrix(group A),platelet-rich fibrin(group B),acellular dermal matrix (group C) and without treatment (group D,the control) (n =9) respectively.The measurments of alveolar bone height and width showed that there were no significant differences among groups at different times(P ＞ 0.05).Bone histomorphometry showed that at the 2th and 4th week,the best result was found in group A(P＜0.01).While,at the 8th week,the result of group A was still better than that of other 3 ones (P ＜ 0.01),but group B and C showed no significant difference(P ＞ 0.05).The combination of PRF and ADM shows the most significant effect.