高度近视眼的黄斑局部视网膜电图频谱分析

目的 :应用局部视网膜电图 (localelectroretingoram ,LERG)频谱分析方法 ,进一步了解高度近视眼黄斑部光感受器细胞与光感受器后神经元细胞功能异常的情况。方法 :6 6例高度近视眼患者 (12 8眼 )的LERG被记录研究。应用手提眼底镜式局部刺激器 ,通过放大的瞳孔直视眼底监控固视状况 ,闪烁光频率 31Hz。结果 :与对照组相比 ,高度近视眼底仅有豹纹状眼底改变和伴后巩膜葡萄肿两组闪烁LERG的 1f与 2f均有降低(P <0 .0 5 ) ,2f在后组中下降显著 (P <0 .0 1) ,且 1f/2f比值有明显增加。对屈光度分组的Fourier分析发现 :1f与 2f在各组均有降低 (P <0 .0 5 ) ,2f的下降在 - 10D以上组显著 (P <0 .0 1) ;1f/2f比值在早期RP病变表现正常或轻度异常 ,随发病病程增加有升高趋势。结论 :高度近视眼的黄斑功能早期以视网膜外层为主 ,随着病情的发展 ,黄斑部内层的受累有加重趋势。不同眼底改变与黄斑功能受损程度具有一致性。LERG频谱分析对高度近视眼黄斑功能的定位定性诊断具有临床意义。

对过敏性紫癜患儿照顾者实施同步健康教育的效果观察

护理人员不能把过敏性紫癜(allergicpurpura,AP)患儿简单作为一个临床病例来对待,而应该把其归属于家庭整体与一种生命或文明的特别方式来对待,其重点体现在让照顾者参加到临床护理等工作中来。医务人员与患儿照顾者彼此协作,他们在制定决策过程中考虑照顾者的抉择,同时维护照顾者的照护意见和决策,并在护理程序的各个层面,主动吸纳照顾者参与[1]。我科施行照顾者同步健康教育模式,降低了过敏性紫癜患儿照顾者的抑郁和焦虑情况,效果良好。

移民环境容量有关问题的探讨

叙述了移民环境容量研究的意义，探讨了移民环境容量研究工作中存在的问题。并定义了移民环境容量。最后，提出移民环境容量的研究方法和工作程序。

Local Electroretinogram and Pattern Visual Evoked Potential in Maculopathies

Purposes: To observe the characteristics of local electroretinogram (LERG) in normal subjects and patients with maculopathies, and to evaluate the applied worth of LERG and pattern visual evoked potential (PVEP) in maculopathies. Methods: LERGs at 5° and 15° macular regions were recorded from 27 normal subjects (54 eyes). The factors of age, different eyes and stimulate areas for LERG influence were observed. Meanwhile, the LERG and PVEP were recorded from 25 patients (35 eyes) with maculopathies for making contrast study. Results: In normal subjects, there was no significant influence of age to LERG. As the stimulated areas increased, the a- and b-wave amplitudes of LERG increased. In the patients with maculopathies, the a- and b-wave amplitudes of LERG at 5°, 10°and 15° macular regions were significantly lowered and the mean values of P1 latency were prolonged and N1-P1 amplitudes of VEP were lowered, comparing with the control group. In the nearing stimulated area (5°LERG and 14. 9×19°PVEP.),

大型油缸的修复工艺

采用本文介绍的工艺,可对各种因缸壁严重磨损而失效的大型油缸进行修复.修复后的油缸不仅可恢复到原来尺寸,而且其使用性能也完全能达到原设计要求.因此这种工艺的推广应用可取得极其显著的经济效益.