422 results on '"Xu, Honglei"'
Search Results
402. DEVELOPMENT AND INTERNAL-EXTERNAL VALIDATION OF THE ACCI-SOFA MODEL FOR PREDICTING IN-HOSPITAL MORTALITY OF PATIENTS WITH SEPSIS-3 IN THE ICU: A MULTICENTER RETROSPECTIVE COHORT STUDY.
- Author
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Huang Y, Gao Y, Quan S, Pan H, Wang Y, Dong Y, Ye L, Wu M, Zhou A, Ruan X, Wang B, Chen J, Zheng C, Xu H, Lu Y, and Pan J
- Subjects
- Humans, Hospital Mortality, Retrospective Studies, Prognosis, Intensive Care Units, ROC Curve, Sepsis
- Abstract
Abstract: Objective: To achieve a better prediction of in-hospital mortality, the Sequential Organ Failure Assessment (SOFA) score needs to be adjusted and combined with comorbidities. This study aims to enhance the prediction of SOFA score for in-hospital mortality in patients with Sepsis-3. Methods: This study adjusted the maximum SOFA score within the first 3 days (Max Day3 SOFA) in relation to in-hospital mortality using logistic regression and incorporated the age-adjusted Charlson Comorbidity Index (aCCI) as a continuous variable to build the age-adjusted Charlson Comorbidity Index-Sequential Organ Failure Assessment (aCCI-SOFA) model. The outcome was in-hospital mortality. We developed, internally validated, and externally validated the aCCI-SOFA model using cohorts of Sepsis-3 patients from the MIMIC-IV, MIMIC-III (CareVue), and the FAHWMU cohort. The predictive performance of the model was assessed through discrimination and calibration, which was assessed using the area under the receiver operating characteristic and calibration curves, respectively. The overall predictive effect was evaluated using the Brier score. Measurements and main results: Compared with the Max Day3 SOFA, the aCCI-SOFA model showed significant improvement in area under the receiver operating characteristic with all cohorts: development cohort (0.81 vs 0.75, P < 0.001), internal validation cohort (0.81 vs 0.76, P < 0.001), MIMIC-III (CareVue) cohort (0.75 vs 0.68, P < 0.001), and FAHWMU cohort (0.72 vs 0.67, P = 0.001). In sensitivity analysis, it was suggested that the application of aCCI-SOFA in early nonseptic shock patients had greater clinical value, with significant differences compared with the original SOFA scores in all cohorts ( P < 0.05). Conclusion: For septic patients in intensive care unit, the aCCI-SOFA model exhibited superior predictive performance. The application of aCCI-SOFA in early nonseptic shock patients had greater clinical value., Competing Interests: The authors report no conflicts of interest., (Copyright © 2024 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the Shock Society.)
- Published
- 2024
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403. Echinacoside Exerts Antihepatic Fibrosis Effects in High-Fat Mice Model by Modulating the ACVR2A-Smad Pathway.
- Author
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Liang J, Chen T, Xu H, Wang T, Gong Q, Li T, Liu X, Wang J, Wang Y, and Xiong L
- Subjects
- Mice, Humans, Animals, Fibrosis, Liver Cirrhosis drug therapy, Liver Cirrhosis pathology, Disease Models, Animal, Hepatic Stellate Cells metabolism, Hepatic Stellate Cells pathology, Transforming Growth Factor beta1, Smad Proteins metabolism, Glycosides
- Abstract
Scope: Nonalcoholic steatohepatitis (NASH) is an increasingly common chronic liver disease in which hepatic fibrosis is the major pathological change. The transforming growth factor β (TGF-β)/mall mothers against decapentaplegic (Smad) signaling is the main effector of fibrosis. Although the antifibrotic effect of echinacoside (Ech) on the liver has been indicated previously, the cellular and molecular mechanisms remain unclear. This study aims to investigate both in vivo and in vitro antifibrotic properties of Ech., Methods and Results: Cell viability and scratch/wound assays show that Ech significantly inhibits the proliferation, migration, and activation of human hepatic stellate LX-2 cells. In mice with high-fat diet-induced hepatic fibrosis, Ech treatment attenuates the progression of liver injury, inflammation, and fibrosis. Furthermore, transcriptome analysis and subsequent functional validation demonstrate that Ech achieves antifibrotic effects by the activin receptor type-2A (ACVR2A)-mediated TGF-β1/Smad signaling pathway; ultimately, ACVR2A is demonstrated to be an important target for hepatic fibrosis by inhibiting and inducing the expression of ACVR2A in LX-2 cells., Conclusion: Ech exerts potent antifibrotic effects by inhibiting the ACVR2A-mediated TGF-β1/Smad signaling axis and may serve as an alternative treatment for hepatic fibrosis., (© 2024 Wiley‐VCH GmbH.)
- Published
- 2024
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404. Effect of Akson Therapy on Acoustic Parameters in Patients with Functional Dysphonia.
- Author
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Xu H and Ye B
- Subjects
- Humans, Retrospective Studies, Asthenia, Voice Quality, Acoustics, Dysphonia therapy
- Abstract
Objective: Functional dysphonia can impair the language expression ability and adversely affect the career development of some patients. Therefore, an active exploration of effective treatment options is imperative. This study investigated the effect of Akson therapy on acoustic parameters in patients with functional dysphonia., Materials and Methods: In this retrospective analysis, 79 patients with functional dysphonia who received conventional voice correction training from June 2020 to June 2021 were included in the reference group (RG). Our hospital has implemented Akson therapy since July 2021. Correspondingly, 72 patients with functional dysphonia who underwent Akson therapy from July 2021 to July 2022 were enrolled in the observation group (OG). The acoustic parameters such as fundamental frequency (F0), jitter, shimmer, and normalized noise energy (NNE); the aerodynamic parameters including maximum phonation time (MPT), mean airflow rate (MFR), and Voice Handicap Index-10 (VHI-10) score; and the Grade, Roughness, Breathiness, Asthenia, and Strain scale (GRBAS) score were measured before and after treatment and compared between the two groups., Results: The F0, jitter, shimmer, NNE, MPT, and MFR values as well as the VHI-10 score and the grade (G), roughness (R), and breathiness (B) scores on the GRBAS did not significantly differ between the two groups before treatment (P > 0.05). However, significantly lower F0, jitter, shimmer, NNE, and MFR values and higher MPT levels were found in the OG compared to the RG after treatment (P < 0.001). Furthermore, the VHI-10 score and the G, R, and B scores were significantly lower in the OG than in the RG after treatment (P < 0.001), whereas the asthenia (A) and strain (S) scores remained at 0 before and after treatment., Conclusion: Akson therapy can improve the acoustic parameters of patients with functional dysphonia to a certain extent, indicating its potential application value., (Copyright © 2024 Noise & Health.)
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- 2024
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405. Association between triglyceride-glucose index and in-hospital mortality in critically ill patients with sepsis: analysis of the MIMIC-IV database.
- Author
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Zheng R, Qian S, Shi Y, Lou C, Xu H, and Pan J
- Subjects
- Female, Humans, Male, Blood Glucose, Cohort Studies, Glucose, Hospital Mortality, Risk Factors, Triglycerides, Retrospective Studies, Critical Illness, Sepsis diagnosis
- Abstract
Background: This study aimed to explore the association between the triglyceride-glucose (TyG) index and the risk of in-hospital mortality in critically ill patients with sepsis., Methods: This was a retrospective observational cohort study and data were obtained from the Medical Information Mart for Intensive Care-IV (MIMIC IV2.2) database. The participants were grouped into three groups according to the TyG index tertiles. The primary outcome was in-hospital all-cause mortality. Multivariable logistics proportional regression analysis and restricted cubic spline regression was used to evaluate the association between the TyG index and in-hospital mortality in patients with sepsis. In sensitivity analysis, the feature importance of the TyG index was initially determined using machine learning algorithms and subgroup analysis based on different subgroups was also performed., Results: 1,257 patients (56.88% men) were included in the study. The in-hospital, 28-day and intensive care unit (ICU) mortality were 21.40%, 26.17%, and 15.43% respectively. Multivariate logistics regression analysis showed that the TyG index was independently associated with an elevated risk of in-hospital mortality (OR 1.440 [95% CI 1.106-1.875]; P = 0.00673), 28-day mortality (OR 1.391; [95% CI 1.52-1.678]; P = 0.01414) and ICU mortality (OR 1.597; [95% CI 1.188-2.147]; P = 0.00266). The restricted cubic spline regression model revealed that the risks of in-hospital, 28-day, and ICU mortality increased linearly with increasing TyG index. Sensitivity analysis indicate that the effect size and direction in different subgroups are consistent, the results is stability. Additionally, the machine learning results suggest that TyG index is an important feature for the outcomes of sepsis., Conclusion: Our study indicates that a high TyG index is associated with an increased in-hospital mortality in critically ill sepsis patients. Larger prospective studies are required to confirm these findings., (© 2023. The Author(s).)
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- 2023
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406. Synergetic roadmap of carbon neutrality and clean air for China.
- Author
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Zhang Q, Yin Z, Lu X, Gong J, Lei Y, Cai B, Cai C, Chai Q, Chen H, Dai H, Dong Z, Geng G, Guan D, Hu J, Huang C, Kang J, Li T, Li W, Lin Y, Liu J, Liu X, Liu Z, Ma J, Shen G, Tong D, Wang X, Wang X, Wang Z, Xie Y, Xu H, Xue T, Zhang B, Zhang D, Zhang S, Zhang S, Zhang X, Zheng B, Zheng Y, Zhu T, Wang J, and He K
- Abstract
It is well recognized that carbon dioxide and air pollutants share similar emission sources so that synergetic policies on climate change mitigation and air pollution control can lead to remarkable co-benefits on greenhouse gas reduction, air quality improvement, and improved health. In the context of carbon peak, carbon neutrality, and clean air policies, this perspective tracks and analyzes the process of the synergetic governance of air pollution and climate change in China by developing and monitoring 18 indicators. The 18 indicators cover the following five aspects: air pollution and associated weather-climate conditions, progress in structural transition, sources, inks, and mitigation pathway of atmospheric composition, health impacts and benefits of coordinated control, and synergetic governance system and practices. By tracking the progress in each indicator, this perspective presents the major accomplishment of coordinated control, identifies the emerging challenges toward the synergetic governance, and provides policy recommendations for designing a synergetic roadmap of Carbon Neutrality and Clean Air for China., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2023 Published by Elsevier B.V. on behalf of Chinese Society for Environmental Sciences, Harbin Institute of Technology, Chinese Research Academy of Environmental Sciences.)
- Published
- 2023
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407. Elevated urbanization-driven plant accumulation and human intake risks of polycyclic aromatic hydrocarbons in crops of peri-urban farmlands.
- Author
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Zhang A, Ye X, Yang X, Li J, Zhu H, Xu H, Meng J, Xu T, and Sun J
- Subjects
- Carcinogens analysis, China, Coal analysis, Crops, Agricultural, Environmental Monitoring, Farms, Humans, Risk Assessment, Soil, Urbanization, Vehicle Emissions analysis, Environmental Pollutants analysis, Polycyclic Aromatic Hydrocarbons analysis, Soil Pollutants analysis
- Abstract
As an ubiquitous carcinogen, polycyclic aromatic hydrocarbons (PAHs) are closely related to anthropogenic activities. The process of urbanization leads to the spatial interlacing of farmlands and urbanized zones. However, field evidence on the influence of urbanization on the accumulation of PAHs in crops of peri-urban farmlands is lacking. This study comparatively investigated the urbanization-driven levels, compositions, and sources of PAHs in 120 paired plant and soil samples collected from the Yangtze River Delta in China and their species-specific human intake risks. The concentrations of PAHs in crops and soils in the peri-urban areas were 2407.92 ng g
-1 and 546.64 ng g-1 , respectively, which are significantly higher than those in the rural areas. The PAHs in the root were highly relevant to those in the soils (R2 = 0.63, p < 0.01), and the root bioconcentration factors were higher than 1.0, implying the contributions of root uptake to plant accumulations. However, the translocation factors in the peri-urban areas (1.57 ± 0.33) were higher than those in the rural areas (1.19 ± 0.14), indicating the enhanced influence through gaseous absorption. For the congeners, the 2- to 3-ring PAHs showed a higher plant accumulation potential than the 4- to 6-ring PAHs. Principal component analysis show that the PAHs in the peri-urban plants predominantly resulted from urbanization parameters, such as coal combustion, vehicle emissions, and biomass burning. The mean values of estimated dietary intake of PAHs from the consumption of peri-urban and rural crops were 9116 ng day-1 and 6601.83 ng day-1 , respectively. The intake risks of different crops followed the order rice > cabbage > carrot > pea. Given the significant input of PAHs from urban to farmland, the influence of many anthropogenic pollutants arising from rapid urbanization should be considered when assessing the agricultural food safety., (© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)- Published
- 2022
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408. Elastase Inhibitor Cyclotheonellazole A: Total Synthesis and In Vivo Biological Evaluation for Acute Lung Injury.
- Author
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Cui Y, Zhang M, Xu H, Zhang T, Zhang S, Zhao X, Jiang P, Li J, Ye B, Sun Y, Wang M, Deng Y, Meng Q, Liu Y, Fu Q, Lin J, Wang L, and Chen Y
- Subjects
- Acute Lung Injury chemically induced, Acute Lung Injury metabolism, Animals, Bleomycin, COVID-19 metabolism, COVID-19 pathology, Cell Line, Disease Models, Animal, Humans, Leukocyte Elastase metabolism, Male, Mice, Mice, Inbred C57BL, Peptides, Cyclic chemical synthesis, Peptides, Cyclic chemistry, Respiratory Distress Syndrome chemically induced, Respiratory Distress Syndrome metabolism, Serine Proteinase Inhibitors chemical synthesis, Serine Proteinase Inhibitors chemistry, COVID-19 Drug Treatment, Acute Lung Injury drug therapy, Leukocyte Elastase antagonists & inhibitors, Peptides, Cyclic pharmacology, Respiratory Distress Syndrome drug therapy, Serine Proteinase Inhibitors pharmacology
- Abstract
Acute lung injury/acute respiratory distress syndrome (ALI/ARDS) is one of the most common complications in COVID-19. Elastase has been recognized as an important target to prevent ALI/ARDS in the patient of COVID-19. Cyclotheonellazole A (CTL-A) is a natural macrocyclic peptide reported to be a potent elastase inhibitor. Herein, we completed the first total synthesis of CTL-A in 24 linear steps. The key reactions include three-component MAC reactions and two late-stage oxidations. We also provided seven CTL-A analogues and elucidated preliminary structure-activity relationships. The in vivo ALI mouse model further suggested that CTL-A alleviated acute lung injury with reductions in lung edema and pathological deterioration, which is better than sivelestat, one approved elastase inhibitor. The activity of CTL-A against elastase, along with its cellular safety and well-established synthetic route, warrants further investigation of CTL-A as a candidate against COVID-19 pathogeneses.
- Published
- 2022
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409. Correction for: LncRNA LOC146880 promotes esophageal squamous cell carcinoma progression via miR-328-5p/FSCN1/MAPK axis.
- Author
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Tang J, Xu H, Liu Q, Zheng J, Pan C, Li Z, Wen W, Wang J, Zhu Q, Wang Z, and Chen L
- Published
- 2021
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410. Thymectomy with angioplasty through a thoracoscopic subxiphoid approach with double elevation of the sternum in Masaoka stage III thymoma.
- Author
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Wang X, Aramini B, Xu H, and Fan J
- Published
- 2021
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411. [A Retrospective Study of Microporous Polysaccharide Hemostatic Powder Combined with Other Repair Materials for Reducing Postoperative Pulmonary Air Leakage during Pulmonary Segmentectomy].
- Author
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Zhang W, Xu H, Wen W, Wang J, Chen L, and Zhu Q
- Subjects
- Acrylic Resins administration & dosage, Adult, Chest Tubes, Drainage, Female, Humans, Lung physiopathology, Lung surgery, Male, Middle Aged, Pneumothorax etiology, Polysaccharides administration & dosage, Postoperative Complications etiology, Retrospective Studies, Treatment Outcome, Lung Neoplasms surgery, Pneumonectomy adverse effects, Pneumothorax therapy, Postoperative Complications therapy
- Abstract
Background: Anatomical segmentectomy is more and more widely used in lung nodules and early stage lung cancer. Postoperative lung air leakage is one of the common complications after surgery. This study aimed to explore the effect of the application of repair materials in precise segmentectomy under thoracoscopy in reducing postoperative lung air leakage., Methods: This study included patients admitted to the Department of Thoracic Surgery of Jiangsu Provincial People's Hospital who were scheduled to undergo thoracoscopic segmentectomy from August 1, 2018 to July 31, 2019. According to the difference of the materials used in the treatment of the inter-segment interface during the operation: patients who used microporous polysaccharide hemostatic powder+fibrin adhesive glue+absorbable polyglycolic acid patch were divided into group A, and the patients with fibrin adhesive+absorbable polyglycolic acid patch were divided into group B. The preoperative basic information of all patients and the daily postoperative chest drainage volume, the indwelling time of the chest drainage tube, the chest radiograph before the chest drainage tube is removed, the chest radiograph after the chest drainage tube is removed, blood routine and postoperative hospital stay were collected and recorded, and the effect of the application of intraoperative repair materials on postoperative lung air leakage was analyzed., Results: There were statistically significant differences in the indwelling time of thoracic drainage tube (P=0.019) and postoperative hospital stay (P=0.017) between the two groups., Conclusions: Compared with the use of the fibrin glue+absorbability polyglycolic acid patch, the use of microporous polysaccharide hemostatic powder+fibrin glue+absorbability polyglycolic acid patch in the treatment of the inter-segment interface during segmentectomy can better reduce the incidence of postoperative air leakage and shorten the postoperative hospital stay.
- Published
- 2020
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412. Long non-coding RNA CCAT2 as a potential serum biomarker for diagnosis and prognosis of multiple myeloma.
- Author
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Xu H, Yin Q, Shen X, and Ju S
- Subjects
- Adult, Aged, Aged, 80 and over, Female, Humans, Male, Middle Aged, Prognosis, Random Allocation, Biomarkers, Tumor blood, Gene Expression Regulation, Neoplastic, Multiple Myeloma blood, Multiple Myeloma diagnosis, RNA, Long Noncoding blood
- Abstract
Increasing knowledge of long non-coding RNAs (lncRNAs) has shown that they can be used as circulating tumor markers. Also, considerable evidences have revealed that lncRNAs have important roles in tumor diagnosis and prognosis. The lncRNA CCAT2 has manifested its carcinogenic effect in a variety of tumors, but the serum expression level and clinical value in multiple myeloma (MM) remain to be explored. In our study, the expression of lncRNA CCAT2 is upregulated in the serum and bone marrow of MM patients by using quantitative real-time polymerase chain reaction (qRT-PCR). The high expression level of CCAT2 in the serum of MM patients correlated with International Scoring System (ISS) stages, renal dysfunction, serum β
2 -microglobulin (β2 -MG) concentration, and light chain (κ and λ) concentrations. Area under the curve (AUC) of CCAT2 in serum is 0.899. Besides, the sensitivity and specificity were 85.80% and 83%, respectively. Furthermore, combination of CCAT2, IgA, HGB, and β2 -MG significantly improved the MM diagnostic sensitivity and AUC. Here, our present investigation indicates that serum circulating CCAT2 may serve as a potential tumor marker for diagnosis and prognosis of MM.- Published
- 2020
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413. Autophagy regulates the therapeutic potential of adipose-derived stem cells in LPS-induced pulmonary microvascular barrier damage.
- Author
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Li C, Pan J, Ye L, Xu H, Wang B, Xu H, Xu L, Hou T, and Zhang D
- Subjects
- Adipocytes, Animals, Autophagy, Cell Differentiation, Mice, Acute Lung Injury pathology, Lipopolysaccharides metabolism, Stem Cells metabolism
- Abstract
Adipose-derived stem cells (ADSCs) have been shown to be beneficial in some pulmonary diseases, and the paracrine effect is the major mechanism underlying ADSC-based therapy. Autophagy plays a crucial role in maintaining stem cell homeostasis and survival. However, the role of autophagy in mediating ADSC paracrine effects has not been thoroughly elucidated. We examined whether ADSCs participate in lipopolysaccharide (LPS)-induced pulmonary microvascular endothelial cell (PMVEC) barrier damage in a paracrine manner and illuminated the role of autophagy in regulating ADSC paracrine effects. PMVECs and ADSCs with or without autophagy inhibition were cocultured without intercellular contact, and the microvascular barrier function was assessed after LPS treatment. ADSC paracrine function was evaluated by detecting essential growth factors for endothelial cells. For in vivo experiments, ADSCs with or without autophagy inhibition were transplanted into LPS-induced lung-injury mice, and lung injury was assessed. ADSCs significantly alleviated LPS-induced microvascular barrier injury. In addition, ADSC paracrine levels of VEGF, FGF, and EGF were induced by LPS treatment, especially in the coculture condition. Inhibiting autophagy weakened the paracrine function and the protective effects of ADSCs on microvascular barrier injury. Moreover, ADSC transplantation alleviated LPS-induced lung injury, and inhibiting autophagy markedly weakened the therapeutic effect of ADSCs on lung injury. Together, these findings show that ADSC paracrine effects play a vital protective role in LPS-induced pulmonary microvascular barrier injury. Autophagy is a positive mediating factor in the paracrine process. These results are helpful for illuminating the role and mechanism of ADSC paracrine effects and developing effective therapies in acute lung injury.
- Published
- 2019
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414. [Preliminary Study on Error Control of Medical Devices Test Reports Based on the Analytic Hierarchy Process].
- Author
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Huang Y, Xu H, Tu R, Zhang X, and Huang M
- Subjects
- Models, Theoretical, Equipment Failure Analysis, Equipment and Supplies standards
- Abstract
In this paper, the common errors in medical devices test reports are classified and analyzed. And then the main 11 influence factors for these inspection report errors are summarized. The hierarchy model was also developed and verified by presentation data using MATLAB. The feasibility of comprehensive weights quantitative comparison has been analyzed by using the analytic hierarchy process. In the end, this paper porspects the further research direction.
- Published
- 2016
415. [Strategy Discussion for Pollution Control of Post-Consumer Home Medical Equipment].
- Author
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Zhang X, Xu H, Huang Y, and Peng X
- Subjects
- Industry, Environmental Pollution prevention & control, Equipment and Supplies standards
- Abstract
Compared with the recycle of post-consumer medical equipments in medical institutions, the treatment of post-consumer home medical equipments (HME) should be consummated in the field of academic research, policy and regulatory plus corresponding supporting industries. The HME industry situation and its classification, main components and properties are reviewed in this paper. The merits and demerits of various pollution control techniques in the recycle of post-consumer medical equipments are analysed. For instance, the source control techniques to improve the property of raw materials, the end treatment technique to recycle the HME and regenerate energy are also discussed. Further, the development prospect of pollution control technique in the recycle of HME and the challenges must face up to are also probed.
- Published
- 2015
416. [Discussion on the building of post market risk analysis method in hemodialysis device].
- Author
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Xu H, Peng X, Tian X, and Wang P
- Subjects
- Government Regulation, Research Design, Risk Management, Renal Dialysis instrumentation, Renal Dialysis standards, Risk Assessment
- Abstract
This paper discussed the building of post market risk analysis method in hemodialysis device from the point of government supervision. By proposing practical research methods for post market risk identification and estimation on hemodialysis device, providing technical guidance for government to put risk management of hemodialysis device into effect, and offering reference for enterprises to carry out post market risk evaluation on their products as well.
- Published
- 2014
417. [Development of ultrasonic power meter].
- Author
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Huang H, Hu C, Zheng Y, Xu H, Zhou W, Wu Z, Yu L, Hao J, and Luo Y
- Subjects
- Equipment Design, Ultrasonics
- Abstract
This article describes the design and development of an ultrasonic power meter which is consist of an electronic balance, a practice target, an acoustic enclosures and a blocking. The electronic balance mounted on the blocking is linked with the practice target by connecting rod. By adjusting the blocking makes the practice target suspended above ultrasound probe, and then the ultrasonic power can be measured. After initial tests, the ultrasonic power meter performanced with good stability and high precision.
- Published
- 2014
418. [Analysis of the security risk in home medical equipment].
- Author
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Peng X, Xu H, and Tian X
- Subjects
- Risk Assessment, Consumer Product Safety, Equipment and Supplies, Household Articles
- Abstract
The popularization of home medical equipment facilitates the treatment and management of many diseases, improving the patient compliance. However, due to the absence of medical background, most of their users have various security risk in the course of reorganization, choosing, using and maintenance of the products. This paper analyzed the property of security risk in home medical equipment, and described the matters needing attention in the using of several common products.
- Published
- 2014
419. [Study of Chinese medical device standardization situation and development strategy].
- Author
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Tian X, Xu H, and Peng X
- Subjects
- China, Equipment and Supplies standards
- Abstract
Based on the analysis of Chinese medical device standardization situation, providing recommendations for the development strategy of Chinese medical device standardization proceed from the duty and advantage of standardized participation.
- Published
- 2013
420. [The meaning of the conception of scientific examination to create "Drug Testing in China" brand].
- Author
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Xu H and Wang P
- Subjects
- China, Pharmaceutical Preparations, Quality Control, Drug Industry organization & administration, Pharmaceutical Services organization & administration
- Abstract
Through the analysis of the current drug testing market, this paper discussion the meeting of creating "Drug Testing in China" brand on the concept of scientific testing.
- Published
- 2011
421. Selective blockade of endothelial NF-kappaB pathway differentially affects systemic inflammation and multiple organ dysfunction and injury in septic mice.
- Author
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Xu H, Ye X, Steinberg H, and Liu SF
- Subjects
- Animals, Capillary Permeability physiology, Disease Models, Animal, Endothelium, Vascular physiopathology, Escherichia coli Infections complications, Inflammation Mediators blood, Mice, Mice, Transgenic, Multiple Organ Failure microbiology, NF-kappa B physiology, Systemic Inflammatory Response Syndrome microbiology, Systemic Inflammatory Response Syndrome prevention & control, Endothelium, Vascular metabolism, Multiple Organ Failure physiopathology, NF-kappa B antagonists & inhibitors, Systemic Inflammatory Response Syndrome physiopathology
- Abstract
Endothelium has long been considered both a source and a target of systemic inflammation. However, to what extent endothelial activation contributes to systemic inflammation remains unclear. This study addresses the relative contribution of endothelial activation to systemic inflammation and multiple organ dysfunction and injury (MOD/I) in an E. coli peritonitis model of sepsis. We prevented endothelial activation using transgenic (TG) mice that conditionally overexpress a mutant I-kappaBalpha, a NF-kappaB inhibitor, selectively on endothelium. TG mice and their transgene negative littermates (WT) were injected with saline or E. coli (10(8) CFU per mouse). At 7 h after E. coli infection, markers of systemic inflammation, endothelial activation, and MOD/I were assessed. WT-E. coli mice showed significantly increased serum levels of TNF-alpha, IL-1beta, IFN-gamma, IL-6, KC, and MCP-1; tissue levels of TNF-alpha, IL-6, KC, MCP-1, ICAM-1, and VCAM-1; endothelial leakage index in heart, lungs, liver, and kidney; significantly increased serum levels of AST, ALT, BUN, and creatinine; and increased mortality. Blockade of NF-kappaB-mediated endothelial activation in TG mice had no effects on serum levels of TNF-alpha, IL-1beta, IFN-gamma, IL-6, KC, and MCP-1 (markers of systemic inflammation), and tissue levels of TNF-alpha, IL-6, KC, and MCP-1, but significantly reduced tissue levels of ICAM-1 and VCAM-1 (markers of endothelial inflammation and activation) in those four organs. TG-E. coli mice displayed reversed endothelial leakage index; reduced serum levels of AST, ALT, BUN, and creatinine; and improved survival. Our data demonstrate that endothelial NF-kappaB-driven inflammatory response contributes minimally to systemic inflammation, but plays a pivotal role in septic MOD/I, suggesting that endothelium is mainly a target rather than a source of systemic inflammation.
- Published
- 2010
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422. Activation of endothelial intrinsic NF-{kappa}B pathway impairs protein C anticoagulation mechanism and promotes coagulation in endotoxemic mice.
- Author
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Song D, Ye X, Xu H, and Liu SF
- Subjects
- ADAM Proteins metabolism, ADAM17 Protein, Animals, Blotting, Western, Endothelial Protein C Receptor, Fibrinogen metabolism, Fluorescent Antibody Technique, Glycoproteins genetics, Glycoproteins metabolism, Immunoenzyme Techniques, Kidney metabolism, Lipopolysaccharides toxicity, Liver metabolism, Mice, Mice, Transgenic, Myocardium metabolism, Protein C genetics, RNA, Messenger genetics, RNA, Messenger metabolism, Receptors, Cell Surface, Reverse Transcriptase Polymerase Chain Reaction, Survival Rate, Thrombomodulin metabolism, Tumor Necrosis Factor-alpha metabolism, Blood Coagulation, Endothelium, Vascular metabolism, Endotoxemia physiopathology, I-kappa B Kinase physiology, NF-kappa B physiology, Protein C metabolism, Signal Transduction physiology
- Abstract
Although the role of systemic activation of the nuclear factor kappaB (NF-kappaB) pathway in septic coagulation has been well documented, little is known about the contribution of endothelial-specific NF-kappaB signaling in this pathologic process. Here, we used transgenic mice that conditionally overexpress a mutant I-kappaBalpha, an inhibitor of NF-kappaB, selectively on endothelium, and their wild-type littermates to define the role of endothelial-specific NF-kappaB in septic coagulation. In wild-type mice, lipopolysaccharide (LPS) challenge (5 mg/kg intraperitoneally) caused markedly increased plasma markers of coagulation, decreased plasma fibrinogen level, and widespread tissue fibrin deposition, which were abrogated by endothelial NF-kappaB blockade in transgenic mice. Endothelial NF-kappaB blockade inhibited tissue factor expression in endothelial cells, but not in leukocytes. Endothelial NF-kappaB blockade did not inhibit LPS-induced tissue factor expression in heart, kidney, and liver. Endothelial NF-kappaB blockade prevented LPS down-regulation of endothelial protein C receptor (EPCR) and thrombomodulin protein expressions, inhibited tissue tumor necrosis factor-alpha converting enzyme activity, reduced EPCR shedding, and restored plasma protein C level. Our data demonstrate that endothelial intrinsic NF-kappaB signaling plays a pivotal role in septic coagulation and suggests a link between endothelial-specific NF-kappaB activation and the impairment of the thrombomodulin-protein C-EPCR anticoagulation pathway.
- Published
- 2009
- Full Text
- View/download PDF
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