心脏是纵隔障内的主要器官,形如一园锥体.从心底部的大血管蒂至心尖的心脏长轴呈头足向,除自右向左倾斜外还自后向前与人体纵轴形成30°～40°夹角。在房室瓣水平的切面上,室间隔为120°的曲面结构,凹面向后,其前缘在后缘...心脏是纵隔障内的主要器官,形如一园锥体.从心底部的大血管蒂至心尖的心脏长轴呈头足向,除自右向左倾斜外还自后向前与人体纵轴形成30°～40°夹角。在房室瓣水平的切面上,室间隔为120°的曲面结构,凹面向后,其前缘在后缘的左侧,后部与房间隔在同一水平面。左、右房室瓣也不在同一水平,右侧更接近心尖.主动脉、肺动脉总干及其分支开口在行径过程中部分相叠…….这些解剖上的特点,使常规正侧位投照的心血管造影不能准确全面清楚地显示血管和各房室的病变.为此,Bargeron 及其同事首先提出了轴位成角投照的电影心血管造影方法.轴位心血管造影术即为改变病人的体位使心脏纵轴与 X 线垂直。展开更多
Objective To compare the efficacy of toric implantable collamer lens(Toric-ICL)and femtosecond laser-assisted in situ keratomileusis(FS-LASIK)for myopia correction in patients with moderate to high myopia complicated ...Objective To compare the efficacy of toric implantable collamer lens(Toric-ICL)and femtosecond laser-assisted in situ keratomileusis(FS-LASIK)for myopia correction in patients with moderate to high myopia complicated with astigmatism.Methods We retrospectively collected data from 64 patients(aged 18-42 years)with moderate to high myopia complicated with astigmatism(128 eyes)undergoing either Toric-ICL(28 patients/56 eyes)or FS-LASIK(36 patients/72 eyes)at our department between January,2019 and December,2020.The changes of uncorrected distance visual acuity(UCVA),spherical equivalent(SE),mean astigmatism correction index(CI),corneal endothelial cell density(ECD)and intraocular pressure(IOP)following the procedures were compared between the two groups.Results In FS-LASIK group,all the eyes(72/72)achieved an UCVA≥1.0,similar to the rate in Toric-ICL group(55/56 eyes;P=0.2374).The postoperative SE was also comparable between FS-LASIK and Toric-ICL groups[0.43±0.06 D(range:-1.0 to 1.50 D)vs 0.38±0.05 D(range:-0.75 to 1.00 D);P=0.56].The mean astigmatism CI was significantly higher in FS-LASIK group than in Toric-ICL group(0.8561 vs 0.7176;P<0.0001),and 88.89%of the eyes in FS-LASIK group and 69.64%in Toric-ICL group had postoperative astigmatism≤0.50 D.No significant changes were observed in postoperative corneal ECD in FS-LASIK group,whereas ECD decreased significantly after the procedure in Toric-ICL group(P=0.0057).The patients undergoing Toric-ICL exhibited no significant changes of postoperative IOP,but the patients receiving FS-LASIK had significantly reduced IOP after the procedure(P<0.001).Conclusion Although the patients included in Toric-ICL group had higher myopia and astigmatism,Toric-ICL still showed better predictability and efficacy for astigmatic correction in Toric-ICL group.Toric-ICL is an effective and safe equivalent of FS-LASIK for correcting moderate myopia but can be more advantageous for correcting high myopia with astigmatism.展开更多
文摘心脏是纵隔障内的主要器官,形如一园锥体.从心底部的大血管蒂至心尖的心脏长轴呈头足向,除自右向左倾斜外还自后向前与人体纵轴形成30°～40°夹角。在房室瓣水平的切面上,室间隔为120°的曲面结构,凹面向后,其前缘在后缘的左侧,后部与房间隔在同一水平面。左、右房室瓣也不在同一水平,右侧更接近心尖.主动脉、肺动脉总干及其分支开口在行径过程中部分相叠…….这些解剖上的特点,使常规正侧位投照的心血管造影不能准确全面清楚地显示血管和各房室的病变.为此,Bargeron 及其同事首先提出了轴位成角投照的电影心血管造影方法.轴位心血管造影术即为改变病人的体位使心脏纵轴与 X 线垂直。
文摘Objective To compare the efficacy of toric implantable collamer lens(Toric-ICL)and femtosecond laser-assisted in situ keratomileusis(FS-LASIK)for myopia correction in patients with moderate to high myopia complicated with astigmatism.Methods We retrospectively collected data from 64 patients(aged 18-42 years)with moderate to high myopia complicated with astigmatism(128 eyes)undergoing either Toric-ICL(28 patients/56 eyes)or FS-LASIK(36 patients/72 eyes)at our department between January,2019 and December,2020.The changes of uncorrected distance visual acuity(UCVA),spherical equivalent(SE),mean astigmatism correction index(CI),corneal endothelial cell density(ECD)and intraocular pressure(IOP)following the procedures were compared between the two groups.Results In FS-LASIK group,all the eyes(72/72)achieved an UCVA≥1.0,similar to the rate in Toric-ICL group(55/56 eyes;P=0.2374).The postoperative SE was also comparable between FS-LASIK and Toric-ICL groups[0.43±0.06 D(range:-1.0 to 1.50 D)vs 0.38±0.05 D(range:-0.75 to 1.00 D);P=0.56].The mean astigmatism CI was significantly higher in FS-LASIK group than in Toric-ICL group(0.8561 vs 0.7176;P<0.0001),and 88.89%of the eyes in FS-LASIK group and 69.64%in Toric-ICL group had postoperative astigmatism≤0.50 D.No significant changes were observed in postoperative corneal ECD in FS-LASIK group,whereas ECD decreased significantly after the procedure in Toric-ICL group(P=0.0057).The patients undergoing Toric-ICL exhibited no significant changes of postoperative IOP,but the patients receiving FS-LASIK had significantly reduced IOP after the procedure(P<0.001).Conclusion Although the patients included in Toric-ICL group had higher myopia and astigmatism,Toric-ICL still showed better predictability and efficacy for astigmatic correction in Toric-ICL group.Toric-ICL is an effective and safe equivalent of FS-LASIK for correcting moderate myopia but can be more advantageous for correcting high myopia with astigmatism.
