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Safety & efficacy of single subconjunctival triamcinolone 5 mg depot vs topical loteprednol post cataract surgery: less drop cataract surgery

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International Journal of Ophthalmology(English edition) 2019年第5期12卷 774-778页

作者： Jagadeesh Kumar Reddy Vivek Chaitanya Neeraj Shah Venkata Prabhakar Guduru Shadab Khan siddharthan kuttupalayam Department of Cornea Sankara Eye Hospital

AIM: To do a randomized prospective interventional study for comparing the effects of a single subconjunctival triamcinolone acetonide(SCTA) injection to tapering topical loteprednol in patients undergoing phacoemulsification surgery under topical anesthesia. METHODS: A total of 400 patients were randomized into 2 groups; Group A(200 patients) received 5 mg SCTA at the end of surgery and topical ketorolac tromethamine(0.5%) with ofloxacin(0.3%) combination for 3 wk. Group B(200 patients) received tapering topical loteprednol etabonate(0.5%) along with ofloxacin(0.3%) and ketorolac tromethamine(0.5%) for 3 wk. Outcomes evaluated were intraocular pressure(IOP), anterior chamber cells/flare and macular oedema postoperatively at 1, 6 and 12 ***: Baseline parameters were almost similar in both the groups. No statistical difference was seen between the preoperative and postoperative IOP values for Group A(P=0.82) and Group B(P=0.61) and postoperative IOP values in between both groups(P=0.14) at 1 wk. Incidence of cells/flare postoperative was statistically not significant(P=0.82) in both groups at all follow up visits. Postoperative macular oedema was not observed at any follow up visit. CONCLUSION: SCTA appears to be an effective alternative to prolong postoperative topical steroid use.

关键词： intraocular pressure subconjunctival triamcinolone acetonide phacoemulsification loteprednol cells/flare less drop cataract surgery

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Green's function of multi-layered poroelastic half-space for models of ground vibration due to railway traffic

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Earthquake Engineering and Engineering Vibration 2017年第2期16卷 311-328页

作者： Wang Futong Tao Xiaxin Xie Lili siddharthan Raj Institute of Engineering Mechanics China Earthquake Administration Key Laboratory of Earthquake Engineeringand Engineering Vibration of China Earthquake Administration Harbin 150080 China School of Civil Engineering and Architecture Heilongiiang University Harbin 150080 China School of Civil Engineering Harbin Institute of Technology Harbin 150090 China Department of Civil and Environmental Engineering University of Nevada Reno NV89557 USA

This study proposes a Green＇s function, an essential representation of water-saturated ground under moving excitation, to simulate ground borne vibration from trains. First, general solutions to the governing equations of poroelastic medium are derived by means of integral transform. Secondly, the transmission and reflection matrix approach is used to formulate the relationship between displacement and stress of the stratified ground, which results in the matrix of the Green＇s function. Then the Green＇s function is combined into a train-track-ground model, and is verified by typical examples and a field test. Additional simulations show that the computed ground vibration attenuates faster in the immediate vicinity of the track than in the surrounding area. The wavelength of wheel-rail unevenness has a notable effect on computed displacement and pore pressure. The variation of vibration intensity with the depth of ground is significantly influenced by the layering of the strata soil. When the train speed is equal to the velocity of the Rayleigh wave, the Mach cone appears in the simulated wave field. The proposed Green＇s function is an appropriate representation for a layered ground with shallow ground water table, and will be helpful to understand the dynamic responses of the ground to complicated moving excitation.

关键词： wave propagation poroelastic medium layered half-space train Green's function

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