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RISS 인기검색어
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- 저자 : Wen-bo Lou (검색결과 2 건)
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Wen-Sheng Lou,Jian-Ping Gu,Xu He,Liang Chen,Hao-Bo Su,Guo-Ping Chen,Jing-Hua Song,Tao Wang 대한영상의학회 2009 Korean Journal of Radiology Vol.10 No.2
Objective: To evaluate the value of early identification and endovascular treatment of iliac vein compression syndrome (IVCS), with or without deep vein thrombosis (DVT). Materials and Methods: Three groups of patients, IVCS without DVT (group 1, n = 39), IVCS with fresh thrombosis (group 2, n = 52) and IVCS with non-fresh thrombosis (group 3, n = 34) were detected by Doppler ultrasonography, magnetic resonance venography, computed tomography or venography. The fresh venous thrombosis were treated by aspiration and thrombectomy, whereas the iliac vein compression per se were treated with a self-expandable stent. In cases with fresh thrombus, the inferior vena cava filter was inserted before the thrombosis suction, mechanical thrombus ablation, percutaneous transluminal angioplasty, stenting or transcatheter thrombolysis. Results: Stenting was performed in 111 patients (38 of 39 group 1 patients and 73 of 86 group 2 or 3 patients). The stenting was tried in one of group 1 and in three of group 2 or 3 patients only to fail. The initial patency rates were 95% (group 1), 89% (group 2) and 65% (group 3), respectively and were significantly different (p = 0.001). Further, the six month patency rates were 93% (group 1), 83% (group 2) and 50% (group 3), respectively, and were similarly significantly different (p = 0.001). Both the initial and six month patency rates in the IVCS patients (without thrombosis or with fresh thrombosis), were significantly greater than the patency rates of IVCS patients with non-fresh thrombosis. Conclusion: From the cases examined, the study suggests that endovascular treatment of IVCS, with or without thrombosis, is effective. Objective: To evaluate the value of early identification and endovascular treatment of iliac vein compression syndrome (IVCS), with or without deep vein thrombosis (DVT). Materials and Methods: Three groups of patients, IVCS without DVT (group 1, n = 39), IVCS with fresh thrombosis (group 2, n = 52) and IVCS with non-fresh thrombosis (group 3, n = 34) were detected by Doppler ultrasonography, magnetic resonance venography, computed tomography or venography. The fresh venous thrombosis were treated by aspiration and thrombectomy, whereas the iliac vein compression per se were treated with a self-expandable stent. In cases with fresh thrombus, the inferior vena cava filter was inserted before the thrombosis suction, mechanical thrombus ablation, percutaneous transluminal angioplasty, stenting or transcatheter thrombolysis. Results: Stenting was performed in 111 patients (38 of 39 group 1 patients and 73 of 86 group 2 or 3 patients). The stenting was tried in one of group 1 and in three of group 2 or 3 patients only to fail. The initial patency rates were 95% (group 1), 89% (group 2) and 65% (group 3), respectively and were significantly different (p = 0.001). Further, the six month patency rates were 93% (group 1), 83% (group 2) and 50% (group 3), respectively, and were similarly significantly different (p = 0.001). Both the initial and six month patency rates in the IVCS patients (without thrombosis or with fresh thrombosis), were significantly greater than the patency rates of IVCS patients with non-fresh thrombosis. Conclusion: From the cases examined, the study suggests that endovascular treatment of IVCS, with or without thrombosis, is effective.
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Dong-yan Liu,Wen-bo Lou,Shi-neng Sun,Yang Zhang,Ying Zhang,Shi-li Zheng 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.12
The recovery of iron phosphate involves the addition of oxidizer to oxidize Fe2+ in the spent LiFePO4 (LFP)material to Fe3+ and the agent commonly used is hydrogen peroxide (H2O2). Nevertheless, H2O2 has disadvantages ofhigh price, easy decomposition and low utilization efficiency. In this manuscript, a facile method is proposed for efficientsynergistic oxidation of Fe2+ in spent LFP leachate with a mixture of oxygen and ozone. Specifically, we found bythermodynamic computations that the dominant oxidation groups of ozone during oxidation varied with acidity. Theoxidation would produce a large number of iron-phosphate complex groups (Fe3H6(PO4)43+, FeH8(PO4)4 and Fe2HPO44+)in the phosphorus-sulfur mixed acid system, leading to a paradoxical pH drop. The optimized conditions for H2O2 oxidationwere explored. It was determined experimentally that oxidation by gas mixture and O2 belonged to the firstorderand second-order reactions with activation energies of 28.68 kJ/mol and 34.61 kJ/mol, respectively, which wereboth controlled by a mixture of chemical reaction and diffusion. The optimized oxidation method was finally determinedby evaluating the cost and oxidation rate of the oxidizers. The results in this study offer a promising method fornew low-cost and efficient Fe2+ oxidation for industrial production.
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