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Search Results: 1 - 10 of 81040 matches for " Meng-Huang Wu "
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Comparing radiation exposure during percutaneous vertebroplasty using one- vs. two-fluoroscopic technique
Li Yen-Yao,Huang Tsung-Jen,Cheng Chin-Chang,Wu Meng-Huang
BMC Musculoskeletal Disorders , 2013, DOI: 10.1186/1471-2474-14-38
Abstract: Background Percutaneous vertebroplasty (PV) requires relatively lengthy fluoroscopic guidance, which might lead to substantial radiation exposure to patients or operators. The two-fluoroscopic technique (two-plane radiographs obtained using two fluoroscopes) during PV can provide simultaneous two-planar projections with reducing operative time. However, the two-fluoroscopic technique may expose the operator or patient to increased radiation dose. The aim of this study was to quantify the amount of radiation exposure to the patient or operator that occurs during PV using one- vs. two-fluoroscopic technique. Methods Two radiation dosimeters were placed on the right flank of each patient and on the upper sternum of each operator during 26 single-level PV procedures by one senior surgeon. The use of two-fluoroscopic technique (13 patients) and one-fluoroscopic technique (13 patients) were allocated in a consecutive and alternative manner. The operative time and mean radiation dose to each patient and operator were monitored and compared between groups. Results Mean radiation dose to the patient was 1.97 ± 1.20 mSv (95% CI, 0.71 to 3.23) for the one-fluoroscopic technique group vs. 0.95 ± 0.34 mSv (95% CI, 0.85 to 1.23) for the two-fluoroscopic technique group (P =0.031). Mean radiation dose to the operator was 0.27 ± 0.12 mSv (95% CI, 0.17–0.56) for the one-fluoroscopic technique group vs. 0.25 ± 0.14 mSv (95% CI, 0.06–0.44) for the two-fluoroscopic technique group (P = 0.653). The operative time was significantly different between groups: 47.15 ± 13.48 min (range, 20–75) for the one-fluoroscopic technique group vs. 36.62 ± 8.42 min (range, 21–50) for the two-fluoroscopic technique group (P =0.019). Conclusion Compared to the one-fluoroscopic technique, the two-fluoroscopic technique used during PV provides not only shorter operative times but also reduces the radiation exposure to the patient. There was no significant difference between the two techniques with regards to radiation exposure to the operator.
Complications of Cement-Augmented Dynamic Hip Screws in Unstable Type Intertrochanteric Fractures - A Case Series Study
Meng-Huang Wu,Po-Cheng Lee,Kuo-Ti Peng,Chi-Chuan Wu
Chang Gung Medical Journal , 2012,
Abstract: Background: Polymethylmethacrylate (PMMA) cement-augmented dynamic hip screws (DHS) have been used as a solution in unstable intertrochanteric fractures (ITF). Our aim was to investigate the complications in PMMA cement-augmented DHS.Methods: All patients who had received DHS plate osteosynthesis with or without PMMA cement augmentation from August 2005 to July 2009 in one medical center were retrospectively reviewed. The fractures were classified as unstable (31-A2.2, 31-A2.3 and 31-A3) on the basis of the Arbeitsgemeinschaft für Osteosynthesefragen classification. Inclusion criteria were patients older than 75 years, unstable ITF treated with cement-augmented DHS, and a minimum of 12 months of follow-up. Exclusion criteria were stable ITFs, incomplete chart records and imaging studies, loss to follow-up or death before bone union.Results: Three hundred twenty-one patients received DHS during the study period. Sixty-seven patients were included in the study (25 men and 42 women; mean age, 81.2 years). The mean follow-up time was 40.2 months, and the mean union time was 18.5 weeks (12-40 weeks). No patient had a lag screw cut-out. Six patients had delayed union or nonunion with side plate failures, including side plate breakage in 1 patient, screw breakage in 3, screw pullout in 1, and recurrent side plate breakage and screw breakage in 1. Deep infection occurred in 1 patient, and 1 had osteonecrosis at the femoral head. The procedure-related complication rate was 8.9%.Conclusions:Cement-augmented DHS have a different failure mode than screw cutout in conventional DHS. Failures tended to be more related to delayed union, nonunion and resultant side plate construct failure.
Infectious Spondylitis-Associated Staphylococcus aureus with Virulence Gene pvl or tst Causes More Necrosis than Apoptosis in Human Alveolar Basal Epithelial Cell Line A549  [PDF]
Tsung-Jen Huang, Chi-Han Lee, Meng-Huang Wu, Yen-Yao Li, Tsung Han Yang, Chin-Chang Cheng, Ching-Yu Lee, Chih-Cheng Lu, Chishih Chu
Advances in Microbiology (AiM) , 2016, DOI: 10.4236/aim.2016.67047
Abstract: Methicillin-sensitive and resistant Staphylococcus aureus (MSSA and MRSA, respectively) can cause non-tuberculosis infectious spondylitis. In 43 cases of bacterial infectious spondylitis, Mycobacterium tuberculosis and S. aureus were the two major causative pathogens. MRSA caused more anterior operations and thoracic infections, while MSSA caused more posterior infections and lumbar infections. Differences between six S. aureus isolates from infectious spondylitis were characterized. MLST and staphylococcal cassette chromosome mec (SCCmec) analysis identified MSSA ST959 and ST30 isolates, MRSA ST239/SCCmec IIIA isolates 2 and 3, ST59/SCCmec IIIA-like isolate 6, and ST30/SCCmec IV isolate 5. While all of the isolates were resistant to penicillin and ampicillin, the MRSA isolates were more resistant than the MSSA isolates. Carbapenem-resistant MRSA ST239/SCCmec IIIA and ST59/SCCmec IIIA-like isolates of the agr1 type were also resistant to clindamycin and erythromycin. Leukocidin genes (pvl or lukED) and hemolysin genes (
Role of the supine lateral radiograph of the spine in vertebroplasty for osteoporotic vertebral compression fracture: a prospective study
Meng-Huang Wu, Tsung-Jen Huang, Chin-Chang Cheng, Yen-Yao Li, Robert Hsu
BMC Musculoskeletal Disorders , 2010, DOI: 10.1186/1471-2474-11-164
Abstract: We enrolled 37 patients with 40 symptomatic osteoporotic VCFs for vertebroplasty; 11 had severely collapsed VCFs with concurrent IVCs detected on the SuLR, the others had not-severely collapsed VCFs. A preoperative StLR, SuLR, magnetic resonance imaging (MRI), and postoperative StLR were taken from all patients. Radiographs were digitized to calculate vertebral body morphometrics including vertebral height ratio and Cobb's kyphotic angle. The intensity of the patient's pain was assessed by the visual analogue scale (VAS) on the day before operation and 1 day, 1 month, and 4 months after operation. The patient's VAS scores and image measurement results were assessed with the paired t-test and Pearson correlation tests; Mann-Whitney U test was used for VAS subgroup comparison. Significance was defined as p < 0.05.IVCs in patients with not-severely collapsed VCFs were detected in 21 vertebrae (72.4%) by MRI, in 15 vertebrae (51.7%) by preoperative SuLR, and in 7 vertebrae (24.1%) by preoperative StLR. Using the MRI as a gold standard to detect IVCs, SuLR exhibit a sensitivity of 0.71 as compared to StLR that yield a sensitivity of 0.33. In patients with VCFs with IVCs detected on SuLR, the average of the postoperative restoration in vertebral height ratio was significantly higher than that in those without IVCs (17.1% vs. 6.4%). There was no statistical difference in the VAS score between severely collapsed VCFs with IVCs detected on SuLR and not-severely collapsed VCFs at any follow-up time point.The SuLR efficiently detects an IVC in VCF, which indicates a better vertebral height correction after vertebroplasty compared to VCF without IVC. Before performing a costly MRI, SuLR can identify more IVCs than StLR in patients with severely collapsed VCFs, whom may become the candidates for vertebroplasty.Vertebroplasty is a minimally invasive surgical procedure that can relieve pain caused by an osteoporotic vertebral compression fracture (VCF) [1-4]. However, VCFs that sh
Integrating Real-time Bridge Scouring Monitoring System with Mobile Location-Based Services
Yung-Bin Lin, Kuo-Chun Chang, Chun-Chung Chen, Shih-Cheng Wong, Lu-sheng Lee, Yung-Kang Wang, Meng-Huang Gu
International Journal of Automation and Smart Technology , 2011, DOI: 10.5875/ausmt.v1i2.127
Abstract: Typhoons and torrential rains not only erode river beds and coasts and damage river-crossing structures, but also affect the geomorphology and topography of rivers and coasts. Additionally, typhoons and torrential rains cause debris flows and flooding in metropolitan areas and threaten the safety of people’s lives and properties. Disaster prevention and reduction of damage caused by typhoons and torrential rains have always been a crucial task of government agencies. Bridges in Taiwan are generally old and have insufficient shock resistance; some bridge foundations are also severely eroded and exposed. Because of global climate changes in recent years, rainfall has become comparatively heavy and rapid. Furthermore, the soil in mountain areas has softened because of factors such as earthquakes or human developments. Debris rushes down with rain every time a torrential rain strikes, significantly impacting the safety of bridges downstream. Although government bridge management units have made budget plans to progressively renovate dangerous old bridges, these bridges are still being use for traffic and transportation. These dangerous old bridges pose a serious threat to the safety of people when an earthquake, typhoon, or flood occurs. During typhoons and floods, increased water levels and changes of the scouring depths have dramatic effects on the safety of bridges. The bridge maintenance unit currently uses the water level and water flow conditions as references when determining whether to close a bridge; however, this is not a good permanent solution. A bridge scour monitoring and warning system that is stable, reliable, and operates normally under flood attacks is required for on-site installation and verification. In recent years, the applied technologies of smart phones have expanded beyond entertainment and communication. Mobile communications are used to transmit relevant information to bridge maintenance and management units and road users when a bridge is potentially damaged. The instant conveying of information allows the bridge management units to implement instant disaster rescue response measures and to notify road users to avoid the dangerous road sections, protecting people’s lives and properties.
Texture Image Segmentation Based on Quotient Space Granularity Synthesis
Ren-jin Liu,Xian-wu Huang,Jing Meng
Asian Journal of Information Technology , 2012,
Abstract: Theory of quotient space has been a potential direction of artificial intelligence in recent years. In this paper the granularity synthesis method of quotient space is applied to analyze and processing of texture images and a new image segmentation algorithm of image segmentation is given. Firstly texture features of coarseness and directionality are extracted to form the different granularity spaces respectively. Then the quotient space synthesis method is adopted to segment the texture image. Experimental results demonstrate that the algorithm of granularity synthesis is useful and valid. Furthermore he paper analyzes the relations between synthesis technology and image fusion, and generalizes some key questions when using quotient space granularity synthesis in image segmentation.
Assessing the variability of the attributable causes of death
Fu WJ, Wu T, Wang Y, Meng H, Huang J
Open Access Medical Statistics , 2011, DOI: http://dx.doi.org/10.2147/OAMS.S21501
Abstract: ssessing the variability of the attributable causes of death Methodology (1886) Total Article Views Authors: Fu WJ, Wu T, Wang Y, Meng H, Huang J Published Date September 2011 Volume 2011:1 Pages 37 - 43 DOI: http://dx.doi.org/10.2147/OAMS.S21501 Wenjiang J Fu1, Tianshuang Wu2, Yu Wang3, Haiying Meng4, Jianshi Huang3 1Department of Epidemiology, 2Department of Mathematics, Michigan State University, East Lansing, MI, USA; 3Department of Epidemiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences; School of Basic Medicine, Peking Union Medical College, Beijing, People’s Republic of China; 4Center for Disease Control and Prevention of Chaoyang District, Beijing, People’s Republic of China "This article is dedicated to the memory of Professor Jianshi Huang, who passed away suddenly during the final proofreading of this article. We thank him for his inspiration and encouragement for this work, as well as his leadership and commitment to public health." Abstract: The study of attributable causes of death (ACD) provides a new venue to quantify the external (nongenetic) causes of mortality, and may guide policymaking to address emerging issues in public health by focusing on the largely preventable risk factors. Given such importance, systematic methods to assess the variability of the attributable number of deaths (AND), including the standard errors and confidence intervals, need to be developed. In this article, we develop two statistical methods of the estimation of the standard errors and confidence intervals for the ANDs, one using multinomial distribution and the other using bootstrap sampling, and study the effect of the size of the mortality through simulations. Both methods are easy to implement and provide valid and efficient estimation of the standard errors and confidence intervals. While AND estimates and their standard errors increase with the size of the mortality, the ratio of the standard error to the AND estimate decreases. We demonstrate the methods with two data sets, the US national mortality data during the year 2006 and the mortality data of Chaoyang district of Beijing, China during the year 2007. We conclude that assessment of the variability is needed for small size mortality as the uncertainty is relatively large, but not for large size mortality.
(Dimethylformamide-κO)(2-hydroxybenzoato-κ2O1,O1′)[tris(1-methyl-1H-benzimidazol-2-ylmethyl-κN3)amine-κN]manganese(II) perchlorate dimethylformamide monosolvate
Huilu Wu,Ying Bai,Xingcai Huang,Xuan Meng
Acta Crystallographica Section E , 2010, DOI: 10.1107/s160053681003610x
Abstract: In the title complex, [Mn(C7H5O3)(C27H27N7)(C3H7NO)]ClO4·C3H7NO, the MnII ion is coordinated in a slightly distorted monocapped trigonal-prismatic geometry. The tris(1-methyl-1H-benzimidazol-2-ylmethyl)amine (Mentb) ligand coordinates in a tetradentate mode and the coordination is completed by a bis-chelating salicylate ligand and a dimethylformamide ligand. The hydroxy group and the ortho H atoms of the salicylate ligand were refined as disordered over two sites with occupancies of 0.581 (8) and 0.419 (8). Both disorder components of the hydroxy group form intramolecular O—H...O hydrogen bonds.
Fixed Points and Stability in Neutral Stochastic Differential Equations with Variable Delays
Meng Wu,Nan-jing Huang,Chang-Wen Zhao
Fixed Point Theory and Applications , 2008, DOI: 10.1155/2008/407352
Abstract: We consider the mean square asymptotic stability of a generalized linear neutral stochastic differential equation with variable delays by using the fixed point theory. An asymptotic mean square stability theorem with a necessary and sufficient condition is proved, which improves and generalizes some results due to Burton, Zhang and Luo. Two examples are also given to illustrate our results.
Fixed Points and Stability in Neutral Stochastic Differential Equations with Variable Delays
Wu Meng,Huang Nan-jing,Zhao Chang-Wen
Fixed Point Theory and Applications , 2008,
Abstract: We consider the mean square asymptotic stability of a generalized linear neutral stochastic differential equation with variable delays by using the fixed point theory. An asymptotic mean square stability theorem with a necessary and sufficient condition is proved, which improves and generalizes some results due to Burton, Zhang and Luo. Two examples are also given to illustrate our results.
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