Objective: To explore the troubleshooting of medical equipment and ensure its function and performance in daily work in hospital. Methods: According to the fault degree, equipment important degree, time and funds the difference, we should adopt different repair method. Results:Medical equipment fault is varied. The repair method depends on the repair time, repair funds for various reasons, we should according to the specific situation, weigh the advantages and disadvantages before making a decision. Conclusion:Medical equipment repair involves many factors. Leadership should be aware of the engineering and technical personnel in the hospital daily work, improve the level of engineering and technical personnel, in order to safeguard the medical equipment intact rate and meet needs.

Objective To observe the effects of Shenqi Bufeitang on expessions of metalloproteinase-9 (MMP-9) and tissue inhibitor of metalloproteinase-1 (TIMP-1) in the airway remodeling of COPD rat model with lung-Qi deficiency syndrome. Methods Quantitative stimulation with tobacco,SO2 and papin was made to establish COPD rat model with lung-Qi deficiency syndrome. Sixty male rats were randomly divided into normal group (N),model group (M),low dose treatment group (LT),medium dose treatment group (MT),high dose treatment group (HT) and glucocorticoid treatment group (GCT). The thicknesses of the airway wall and smooth muscle layer of the small airway were measured by means of image analyzer. The protein expressions of MMP-9 and TIMP-1 were examined by immunohistochemical analysis. Results The protein expressions of MMP-9 and TIMP-1 in brouch us and lung and the thinknesses of the airway wall and smooth muscle layer in M group were significanthly higher than those in N group (P

Objective To develop an anion-exchange chromatographic method for the determination of trace thiocyanate and iodide. Methods A sample containing thiocyanate and iodide was pumped through a continuous rod anion-exchange column and the two anions were eluted subsequently with potassium bromide and were determined by a UV detector simultaneously. Results It was proved that the chromatographic column could separate thiocyanate and iodide effectively in the optimum conditions. The linear equation of iodide was y=3 272 860x+51 929.537 57, r=0.999 03, the final detection range was 0.30-3.0 mmol/L, the detection limit was 1.27 ?g/L, the recovery rate was 87% and RSD was 2.75%, the linear equation of thiocyanate was y=3 163 690 x+1 057 080, r=0.999 49, the final detection range was 5.0-80 mmol/L, the detection limit was 30 ?g/L, the recovery rate was 85% and RSD was 3.22%. Conclusion This method is simple, reliable, better anti-interference and is applicable to the determination of trace thiocyanate and iodide.

Objective Satellite cells(SCs) transplantation was tried to improve cardiac function in this experiment.Methods A myocaridium infarction was created in 23 male Suzhong pigs by ligating the diagonal ramus,and the alive pigs were divided into the experimental group and the control group.SCs were extracted,purified,cultured by modified Dorfman method,and were transplanted into myocardium by intramyocardial injection.By pathomorphological research,we observed the therapeutic outcomes of heart failure.Results ⑴10 pigs were alive(5 in the control group,and the other 5 in the experimental group).The successful rate of making mould was 43 5%.⑵After cultured in vitro for 3 days,SCs were spindle-shaped,and sticked to walls.SCs growth were stasis and each other fusing into form myotube when we delayed to divede Petri dishs or reduced the concentration of Fetus Bovine Serum(FBS) in the culture medium.⑶In the experimental group,neonate skeletal muscle cells were observed in the infarction regions,which were multi-nuclei near edges.These cells aligned in an accordance direction.Intercalated disks were not found between them.The capillary density in experimental group was much higher than the control group.Conclusions Autograft of SCS can be alive in acceptor,and improve the heart function by altering cardiac compliance and configuration,or by stimulating the blood capillary proliferation.SCs don't form intercalated disks with remnant myocardial cells,so synchro-contraction will not occur between them,but malign arrhythmia are not found.

Objective To study the relationship between Th1/Th2 cytokine profiles and the survival time of cardiac allografts in mice.Methods The ventral heterotopic cardiac transplantation models were divided into three groups: rejection group, treated group, isograft group, each group with 20 recipients. Mean survival time(MST), pathologic histological changes, the mRNA expression of IFN-?,IL-2,IL-4 and IL-10 were measured.Results MST of heart allografts in rejection and treated group was (7.8?0.77)d, and (14.80?1.01)d respectively. The survival time of grafts in isograft group were all more than 28d. The difference among the three groups was significant. In rejection group, the number of infiltrating cells was much more than that in the other groups, and also, the extent of pathologic histological changes was more severe. The mRNA expression of IFN-? and IL-10 in graft and spleen in rejection group was much stronger than that in the others. There was no obvious mRNA expression of IL-2 and IL-4 in grafts of all three groups. The mRNA expression of IL-2 in the spleens of rejection group was the strongest, while the mRNA expression of IL-4 in the spleens of treated group was the strongest.Conclusions The dynamic equilibrium of Th1/Th2 cytokines plays an important role in the survival time prolongation of cardiac allografts in mice. IL-10 can also participate in the process of graft rejection.

Objective To explore an improved technique of mouse ventral heterotopic heart transplantation and construct an animal model for the study of transplantation immunity.Methods The donor heart aorta and the recipient ventral aorta, the donor pulmonary artery and the recipient inferior caval vein, were anastomosed by using the end-to-side suture technique respectively. At the same time, important anatomical structures of transplantation-related sites were measured.Results The diameter of recipient inferior caval vein and ventral aorta was (1.9?0.2)mm and (0.9?0.1)mm respectively. The average length of ventral blood vessels which can be used was (6.0?1.0)mm. The model construction success rate was 92%. The average time of donor operation and recipient operation was (8.0?1.0)min and (40.2?3.0)min respectively. The time of artery anastomosis and vena cava anastomosis was (9.3?1.2)min and (7.8?1.7)min respectively. Conclusions The animal model is stable and can be used for the study of transplantation immunity.

The cardiovascular and cerebrovascular diseases have become a main category of disease which affects human health today.It is helpful to search for its causes and main risk factors for scientific prevention and control of these diseases.Now,we have already paid close attention to effect of the airborne contaminant and meteorological factors on the cardiovascular and cerebrovascular diseases.Some reports about solo affect of two types factors have given a clear results;however,a little of unification evidences have been provided.This article reviews the solo and unification effects of pollutants and meteorological factors in the cardiovascular and cerebrovascular diseases.

Objective To evaluate two different MRI techniques , enhanced 3D STIR SPACE and unidirectionally-encoded DWIBS MR Neurography in visualizing the brachial plexus.Methods Twenty healthy volunteers underwent MR scanning by the procedures of unidirectionally -encoded DWIBS and enhanced 3D STIR SPACE sequence of the brachial plexus.Original images were reconstructed with coronal maximum intensity projection ( MIP ).The image quality was assessed by comparing the visualization of various parts of the brachial plexus and the suppression ratio of image background.The degree of visualization was compared via χ2-test of paired data , and comparison of background suppression scores was performed using a nonparametric Wilcoxon signed rank sum test.Results The successful rate of visualizing the brachial plexus supraclavicular section ( C5-T1 ) was 84% ( 167/200 ) and 99% ( 198/200 ) , respectively, for the DWIBS and enhanced 3D STIR SPACE, and the rate for the infraclavicular section was 33%( 13/40 ) and 95% ( 38/40 ).The differences between these two techniques were statistically significant (χ2 value was 28.18 and 31.15 respectively, P <0.01).In all images, the scores of grade (Ⅰ-Ⅳ) of background suppression were 0, 0, 4 and 16 for unidirectionally-encoded DWIBS, respectively;while they were 15, 4, 1 and 0 for enhanced 3D STIR SPACE.There was significant difference between the two techniques ( Z =3.96,P <0.01).Conclusions High-quality MR neurography of the brachial plexus can be obtained using the enhanced 3D STIR SPACE sequence.It offers a complete anatomical coverage of the brachial plexus , and thus demonstrates a better capacity in depicting the anatomy of brachial plexus as compared with the unidirectionally-encoded DWIBS.

Objective:To evaluate the clinical feasibility and image quality of three-dimensional breath-hold gradient and spin-echo (3D BH-GRASE) sequence in magnetic resonance cholangiopancreatography (MRCP).Methods:In this prospective study, 59 patients with clinically suspected pancreaticobiliary duct disease performed MRCP with both 3D BH-GRASE and 3D respiration-triggered turbo spin-echo (3D RT-TSE) sequences on 3.0 T scanner in the Affiliated Zhangjiagang Hospital of Soochow University from November 2017 to December 2018. The overall image quality was scored independently by 3 experienced radiologists based on the visibility of different anatomical features of the pancreaticobiliary duct. For comparing the 2 sequences, the statistical difference in scan time was assessed with a paired t test; while subjective scores, signal-to-noise ratios (SNR), contrast ratios (CR) and contrast noise ratios (CNR) were compared with Wilcoxon signed rank test. Results:The scan time of 3D BH-GRASE sequence was 16.4 s while that of 3D RT-TSE was (258.6±42.2) s. Their difference was statistically significant ( t=44.073, P<0.001), with the scan time for 3D BH-GRASE shortened by 94%. The overall quality scores of 3D BH-GRASE images were better than those of 3D RT-TSE ( Z=-6.595, P<0.001). There was no statistical difference ( P>0.05) in the scores regarding the visibility of the upper, middle and lower parts of common bile duct and the first and second branches of left and right hepatic ducts. For visualizing the bottom, body, neck and duct of gallbladder, the 3D BH-GRASE sequence received a higher score than the 3D RT-TSE sequence ( P<0.001). For displaying the proximal, middle and distal segments of main pancreatic duct, the 3D RT-TSE sequence was scored higher than the 3D BH-GRASE sequence ( P<0.05). There was no significant difference of SNR between the two sequences ( Z=0.403, P=0.687), whereas CR and CNR of 3D RT-TSE MRCP were better than those of 3D BH-GRASE MRCP ( Z=6.215, P<0.001 and Z=3.046, P=0.002, respectively). Conclusion:Under the prerequisite of ensuring image quality, a proper use of 3D BH-GRASE sequence can significantly shorten the scan time and thus greatly improve the working efficiency of MRCP examination.

Objective:To discuss the effect of sarcopenia (Sa) on the prognosis of transjugular intrahepatic portosystemic shunt (TIPS) in patients with portal hypertension (PHT).Methods:Totally 131 PHT patients treated with TIPS were retrospectively collected from August 2013 to December 2017 in the First Affiliated Hospital of USTC, and were divided into the Sa group [maximum transverse diameter of the psoas major muscle/height (TPMT/H) ≤16.8 mm/m, n=60] and the control group (TPMT/H>16.8 mm/m, n=71). The patients were followed up with a median time of 42 months. The Kaplan-Meier method was used to calculate the incidence of hepatic encephalopathy, recurrence rate of PHT-related complications and survival rate of PHT patients after TIPS, and the differences were compared by Log-rank test. Results:The incidences of hepatic encephalopathy within 6 months after TIPS and severe hepatic encephalopathy requiring hospitalization in the Sa group [36.7% (95%CI 24.5%-48.8%) and 15.0% (95%CI 6.0%-24.0%)] were higher than those of the control group [15.7% (95%CI 7.3%-24.1%) and 2.8% (95%CI 0-6.7%)], with statistically significant differences (χ2=7.843, 16.442, P=0.005, 0.001). The 5-year overall recurrence rate of PHT-related complications of the Sa group after TIPS [15.8% (95%CI 6.4%-25.2%)] was higher than that of the control group [5.7% (95%CI 0.2%-11.2%)], with a statistically significant difference (χ2=4.431, P =0.035. The 1, 3 and 5-year survival rates in the Sa group were 88.3% (95%CI 80.3%-96.3%), 86.7% (95%CI 78.1%-95.3%) and 77.8% (95%CI 65.1%-90.5%) respectively, which were all lower than those of the control group [97.2% (95%CI 93.3%-100%), 95.8% (95%CI 91.1%-100.0%) and 93.7% (95%CI 87.6%-99.87%) respectively], and the difference was statistically significant (χ2=5.055, P=0.025). Conclusion:Sa has a higher incidence in PHT patients, which can increase the incidence of hepatic encephalopathy and recurrence rate of PHT-related complications, and can decrease the survival rate in PHT patients after TIPS. Hence, the Sa is an indicator of the poor prognosis in PHT patients with TIPS.