观察23G光导纤维非接触广角系统巩膜扣带术治疗原发性孔源性视网膜脱离的安全性和有效性。纳入患者28例28只眼,其中,26眼行节段加压术,2眼行节段加压环扎术。结果显示,与术前相比,术后第12月最佳矫正视力显著提升(0.60±0.44 vs 0.2...观察23G光导纤维非接触广角系统巩膜扣带术治疗原发性孔源性视网膜脱离的安全性和有效性。纳入患者28例28只眼,其中,26眼行节段加压术,2眼行节段加压环扎术。结果显示,与术前相比,术后第12月最佳矫正视力显著提升(0.60±0.44 vs 0.22±0.24);眼压由术前的14.6±3.3 mmHg升高至术后第12月的20.3±6.1 mmHg。一次手术网脱复位率96.4%。23G光导纤维非接触广角系统巩膜扣带术能有效治疗原发性孔源性视网膜脱离,且术后并发症少。展开更多
目的:比较经传统球结膜切口和微创球结膜切口行巩膜外加压术对单纯性孔源性视网膜脱离手术效果及术后舒适度的影响。方法:随机对照临床试验。选择2016-08/2018-11在我院眼科接受手术治疗的单纯性孔源性视网膜脱离患者80例80眼,随机分成...目的:比较经传统球结膜切口和微创球结膜切口行巩膜外加压术对单纯性孔源性视网膜脱离手术效果及术后舒适度的影响。方法:随机对照临床试验。选择2016-08/2018-11在我院眼科接受手术治疗的单纯性孔源性视网膜脱离患者80例80眼,随机分成两组,均接受巩膜外加压术联合术后光凝封闭裂孔,对照组40例40眼采用传统球结膜切口,试验组40例40眼采取微创球结膜切口。记录手术用时,术后1d经裂隙灯检查视网膜复位情况,并采用视觉模拟评分法(VAS)评价疼痛情况,术后1、7、14、30d以问卷形式评价术后舒适度。结果:两组患者均顺利完成手术,试验组患者手术用时明显短于对照组(55.13±2.77min vs 56.63±3.69min,P=0.043)。术后1d,两组患者裂孔均位于术嵴中央或前坡上,裂孔周围视网膜复位良好,但试验组患者疼痛感明显小于对照组,且术后1、7d试验组患者舒适度明显高于对照组。结论:采用微创球结膜切口可以缩短手术时间,明显减少患者术后疼痛及不适感。展开更多
This study explored the buckling of multiple intersecting spherical shells.A three-segment spherical shell was designed using the theory of deformation coordination;the design was compared with that of a volume-equiva...This study explored the buckling of multiple intersecting spherical shells.A three-segment spherical shell was designed using the theory of deformation coordination;the design was compared with that of a volume-equivalent cylindrical shell and ring-ribbed cylindrical shell.The numerical results indicated that the buckling capacity of the three-segment spherical shell was superior to those of the other two cylindrical shells.To validate our numerical approach,three laboratory-scale shell models were fabricated.Each model was accurately measured and slowly tested in a pressure chamber;thus,the tested shells were studied numerically.The experimental collapse modes agreed well with numerical results,and the collapse load of the three-segment pressure shell was considerably higher than that of the two cylindrical shells.展开更多
Based on the multi-rigid body discretization model, namely, finite segment model,a chain multi-rigid-body-hinge-spring system model of a beam was presented, then a nonlinear parametrically exacted vibration equation o...Based on the multi-rigid body discretization model, namely, finite segment model,a chain multi-rigid-body-hinge-spring system model of a beam was presented, then a nonlinear parametrically exacted vibration equation of multi-degrees of freedom system was established using the coordination transformation method, and its resonance fields were derived by the restriction parameter method, that is, the dynamical buckling analysis of the beam. Because the deformation of a beam is not restricted by the discrete model and dynamic equation, the post buckling analysis can be done in above math model. The numerical solutions of a few examples were obtained by direct integrated method, which shows that the mechanical and math model gotten is correct.展开更多
文摘观察23G光导纤维非接触广角系统巩膜扣带术治疗原发性孔源性视网膜脱离的安全性和有效性。纳入患者28例28只眼,其中,26眼行节段加压术,2眼行节段加压环扎术。结果显示,与术前相比,术后第12月最佳矫正视力显著提升(0.60±0.44 vs 0.22±0.24);眼压由术前的14.6±3.3 mmHg升高至术后第12月的20.3±6.1 mmHg。一次手术网脱复位率96.4%。23G光导纤维非接触广角系统巩膜扣带术能有效治疗原发性孔源性视网膜脱离,且术后并发症少。
文摘目的:比较经传统球结膜切口和微创球结膜切口行巩膜外加压术对单纯性孔源性视网膜脱离手术效果及术后舒适度的影响。方法:随机对照临床试验。选择2016-08/2018-11在我院眼科接受手术治疗的单纯性孔源性视网膜脱离患者80例80眼,随机分成两组,均接受巩膜外加压术联合术后光凝封闭裂孔,对照组40例40眼采用传统球结膜切口,试验组40例40眼采取微创球结膜切口。记录手术用时,术后1d经裂隙灯检查视网膜复位情况,并采用视觉模拟评分法(VAS)评价疼痛情况,术后1、7、14、30d以问卷形式评价术后舒适度。结果:两组患者均顺利完成手术,试验组患者手术用时明显短于对照组(55.13±2.77min vs 56.63±3.69min,P=0.043)。术后1d,两组患者裂孔均位于术嵴中央或前坡上,裂孔周围视网膜复位良好,但试验组患者疼痛感明显小于对照组,且术后1、7d试验组患者舒适度明显高于对照组。结论:采用微创球结膜切口可以缩短手术时间,明显减少患者术后疼痛及不适感。
基金This study was supported by the National Natural Science Foundation of China(Grant numbers 51709132 and 51679133),Jiangsu Provincial Government Scholarship Programme,and the“Construction of a Leading Innovation Team”project by Hangzhou City Government.
文摘This study explored the buckling of multiple intersecting spherical shells.A three-segment spherical shell was designed using the theory of deformation coordination;the design was compared with that of a volume-equivalent cylindrical shell and ring-ribbed cylindrical shell.The numerical results indicated that the buckling capacity of the three-segment spherical shell was superior to those of the other two cylindrical shells.To validate our numerical approach,three laboratory-scale shell models were fabricated.Each model was accurately measured and slowly tested in a pressure chamber;thus,the tested shells were studied numerically.The experimental collapse modes agreed well with numerical results,and the collapse load of the three-segment pressure shell was considerably higher than that of the two cylindrical shells.
文摘Based on the multi-rigid body discretization model, namely, finite segment model,a chain multi-rigid-body-hinge-spring system model of a beam was presented, then a nonlinear parametrically exacted vibration equation of multi-degrees of freedom system was established using the coordination transformation method, and its resonance fields were derived by the restriction parameter method, that is, the dynamical buckling analysis of the beam. Because the deformation of a beam is not restricted by the discrete model and dynamic equation, the post buckling analysis can be done in above math model. The numerical solutions of a few examples were obtained by direct integrated method, which shows that the mechanical and math model gotten is correct.
