ObjectiveTo investigate the clinical effect of carvedilol in the treatment of chronic heart failure patients with arrhythmia.Methods120 cases of hospitalized cases of cardiology were randomly divided into treatment and control groups by checking the random number table.The control group was given benazepril hydrochloride combined digoxin cardiac medicine and furosemide or hydrochlorothiazide,spironolactone and other diuretics in the treatment.The treatment group was given carvedilol based on the treatment of the control group.Followed up for 12 weeks,the clinical manifestations,blood pressure and heart rate,left ventricular ejection fraction(EF) and arrhythmias before and after treatment were obsered,and to determine the efficacy.ResultsThe treatment group decreased heart rate,corrected ventricular premature contraction,ventricular contraction and ventricular tachycardia in comparison with the control group with significant differences(t =6.018、5.319、7.623、6.194、7.562,all P ＜0.001 ),and there was a significantly statistical significance( P ＜ 0.01 ) that the treatment group can increase the ejection fraction compared with the control group.The markedly and total efficiency was more effective in the treatment group than the control group,which was statistically significant(x2 =34.301,P ＜0.05).ConclusionThere was a positive effect of carvedilol in improving heart function,reduceing arrhythmias and mortality,and reducing hospitalization rate and other aspects.

ObjectiveTo study the value of serum soluble intercellular adhesion molecule-1 (sICAM-1),B-type natriuretic peptide (BNP) and C-reactive protein (CRP) levels detection on assessment of illness in patients with congestive heart failure.MethodsSixty-three patients with congestive heart failure were involved in this study.The levels of serum sICAM-1,BNP and CRP were compared in patients with different NYHA cardiac function classification before and after treatment.ResultsThe levels of serum sICAM-1,BNP and CRP in NYHA cardiac function classification ≥ Ⅲ grade patients were significantly higher than those in NYHA cardiac function classification ＜ Ⅲ grade patients[ (392.6 ± 73.3) μ g/L vs.(212.6 ± 83.4) μ g/L,( 1992.5 ±1173.7) ng/L vs.(512.6 ± 283.2) ng/L,(49.3 ± 33.5 ) mg/L vs.(6.1 ± 3.6) mg/L] (P ＜ 0.01 ).The levels of serum sICAM-1,BNP and CRP after treatment were significantly decreased compared with those before treatment [ ( 168.9 ± 52.5) μ g/L vs.(362.8 ± 123.1 ) μ g/L,(68.6 ± 38.4) ng/L vs.(1470.9± 1460.1) ng/L,(3.6±2.8) mg/L vs.(34.1 ±29.8) mg/L] (P ＜ 0.01).Conclusion Serum sICAM-1,BNP and CRP levels are positively related with illness,and serum sICAM-1,BNP and CRP levels may be judged as an index assessing treatment effect and prognosis.

Objective To realize SLAM and path planning of mobile robot to solve the problem of real-time data association in the process of moving and to update the computational complexity of the state covariance matrix.Methods The mathematical model of SLAM was built,and FastSlam algorithm based on particle filter,A* and dynamic window approach (DWA) were used to prepare gmapping function package in the ROS framework.Results The motion simulation,path planning and dynamic obstacle avoidance of mobile robot in the ROS framework were realized.Conclusion By using ROS platform,mobile robots can execute path planning efficiently while completing self-localization and map building.

Paeonol is an nerb which has been used us an anodyne. The analgesic action of Paeonol has been shown in this paper by using the following methods: Mice licking hind paw on hot plate (55℃); mice wring evoked by ip 0. 7% acetic acid 10 ml ? kg-1; continuous pain stimuli elicited by sc 2. 5% formaldehyde 0. 03 ml in fore paw of mice.No tolerance of analgesic effect was found after daily sc of Paeonol 100 mg ? kg-1for 7 d in mice assayed with hot plate method. In naloxone-challenge test, no jumping response was observed in mice treated with Paeonol 690mg ? kg-1, the maximal tolerance dose. The results indicate that Paeonol induced no morphine-like tolerance norphysical dependence.The analgesic action of Paeonol was not an-tagonizd by naloxone, but was eliminated by in-traperitoneal injection reserpine 3 mg ? kg-1 3 h prior to Paeonol. These results demonstrate that Paeonol belongs to the non-narcotic analgesic, and suggested that the analgesic action of Paeonol may be related to the monoamine level in brain.

Objective To propose a grasp torque control based on experimental learning and haptic feedback to facilitate the manipulator in dexterous manipulation.Methods An experience database was built firstly,and then the object was recognized by tactile feedback in the grasp task.If the object had been experitentially grasped,the torque was output based on the database.In case a new object was grasped,the optimal output torque was calculated by iterative learning.Results The experiment showed that the robot hand could find the experiential output torque quickly when encountering the object in database and calculate the torque by iterative learning to achieve grasp task.Conclusion The experiential database grows up when the robot hand learns more and more experience.It can fast output torque like human in the grasp task.

Objective To investigate the acoustic characteristics of snoring sound in patients with obstructive sleep apnea hypopnea syndrome (OSAHS) and with simple snoring. Methods 22 patients with OSAHS and 15 with simple snoring were included in this study. Natural overnight snoring was digitally recorded and portable sleep mo-nitoring was performed simultaneously. 10 snores, which were the 1st snores after 10 cycles of obstructive apnea, from each patient in OSAHS group, and 10 snores from each patient in simple snoring group were analyzed in the time and frequency domains. Results The sound waves of snoring in the two groups exhibited different patterns both in the time and frequency domains. The snoring spectrum of patients with simple snoring showed distinct fun-damental- harmonic structures which were not clear in patients with OSAHS. The central frequency of the patients with OSAHS was higher, and 800 Hz power ratio was lower than those of the patients with simple snoring. In the OSAHS group, the central frequency of the patients with moderate-to-severe OSAHS was higher, and 800 Hz power ratio was lower than those of the patients with mild OSAHS. The differences of the two parameters were of statistical significance. Conclusion The snoring sounds in patients with OSAHS and with simple snoring have dif-ferent characteristics in time and frequency domains, indicating that it is feasible to research the OSAHS by way of snore monitoring and analyzing technique.

Objective To design a vision-based detection method for rotated human bodies to fulfill unmanned wounded search in the rescue operation.Methods HOG (histogram of oriented gradient) which was the most successful visual feature in pedestrian detection was involved in,and the human detection in the wounded search task was realized by multi-directional detection.Furthermore,two human bodies datasets were established by imitating the views of unmanned ground vehicle (UGV)and unmanned aerial vehicle (UAV).Results The application to the two datasets proved the method's feasibility in UGV and UAV.Conclusion The method is robust to the in-plane rotations and out-plane rotations of human bodies,which is of vital significance to promote the efficiency of the wounded searching and rescuing.

Objective To study the clinical characteristics of tracheotomy in patients with critical diseases and obesity aged 80 years and over. Methods A total of 120 patients with critical diseases and obesity undergoing tracheotomy from July 2006 to August 2011 were retrospectively reviewed,and divided into advanced age group(aged 80-99 years,n=60) and control group(aged 60-79 years,n=60).Surgery time,operation preparation,surgery skill and complication after surgery were compared between the two groups. Results A total of 60 patients undergoing tracheotomy were successfully performed by relative surgery skills according to characteristics of critical obesity in advanced age group.There was 1 case (1.7％) and 0 case with trachea cannula exodus,3 cases (5.0％) and 4 cases(6.7％) with cuff leak,4 cases (6.6％) and 3 cases(5.0％) with stoma bleeding,5 cases (8.3％) and 7 cases (11.4％) with subcutaneous emphysema in advanced age and control groups,respectively.Total complication rate was similar between the two groups of patients [13 cases (21.7％) vs.14 cases (23.3％),x2 =1.00,P＞0.05]. Conclusions Individualized procedure of tracheotomy may reduce complication of patients with critical diseases and obesity aged 80 years and over.

Objective To investigate the localization,zone and activation intensity of olfactory center in young versus elderly healthy volunteers by functional magnetic resonance imaging (BOLD-fMRI),so as to elucidate the effect of age on olfactory center in healthy population.Methods Thirteen right-handed healthy adult volunteers were recruited and divided into two groups:young group (5 males and 3 females,mean aged 23 years) and elderly group (2 males and 3 females,mean aged 69.2 years).The olfactory stimulus was r-undecalactone,and it was given according to a block design.The fMRI detection was performed on Philips Achieva 3.0 T MR scanner,and data of BOLE-fMRI was processed and analyzed to get cerebration image by using SPM2.Results In groupaveraged maps,both young and elderly group showed significant olfactory activation in right parahippocampal gyrus,left hippocampal sulcus,right and left superior temporal gyrus,etc,subcortical activation in right thalamus,dorsal pons,and cerebellum activation in cerebellar vermis.Activations in right inferior frontal gyrus,right middle frontal gyrus,right medial occipito-temporal gyrus and right fimbria of hippocampus were observed only in young group,while activation in bilateral middle temporal gyrus was observed only in elderly group.Activation area was apparently smaller and activation degree was lower in elderly group than in young group.Activation intensity in right superior parietal lobule and bilateral superior temporal gyri was higher in male group than in female group (t=13.7,6.08,5.36,respectively,all P＜0.001).Conclusions The intensity of activation in olfactory center is lower in the elderly than in the young,and absence of part of the active regions is found in the elderly,which demonstrates the regression of olfactory center in the elderly.The olfactory center shows right-predominant activation,and olfactory activation intensity in some cortical regions is higher in males than in females.

Objective The research aimed at evaluating whether non-invasive endolymphatic MR imaging could be used in aged patients(≥60 years)suffering from Meniere's disease.Methods Under guidance of nasal endoscopy,a diluted gadopentetate dimeglumine injection was administrated through eustachian tube into mid-ear cavity in four patients (≥60 years old) suffered from Meniere's disease.3D-FLAIR MRI scan was performed one day after the administration.Results The administration succeeded through eustachian tube into mid-ear cavity in those four patients.A rise of fluid level on tympanic membrane while administrating a diluted gadopentetated meglumine injection was observed.Imaging of inner ear endolymphatic spaces were visible in vestibule and cochlea in imaging of patient 1.As to patient 2,in cochlea the scala tympani of the first and second turns were enhanced while scala vestibule weren't;Vestibules couldn't be recognized.In images of patient 3,the scala tympani of the three turns in cochlea were enhanced while scala vestibule weren't;Vestibules couldn't be recognized.For Patient 4,in cochlea the scala tympani of the first turn were enhanced while scala vestibule weren't,and the second turn was partially enhanced;and endolymphatic space of vestibule could be distinguished from perilymphatic space.Conclusions This technique could be adopted in investigation of Meniere's disease in elderly patients.MR imaging of endolymphatic spaces in vestibule and cochlea can be visualized,which may partially provide data for diagnosis of Meniere's disease.