后路减压植骨融合3D脊柱内固定系统治疗腰椎滑脱症

[目的]观察3D脊柱内固定系统对腰椎滑脱症的固定及治疗效果。[方法]2004年1月～2005年7月,对42例腰椎滑脱症患者(其中,男28例,女14例)运用椎板减压、椎管后外侧植骨融合、3D椎弓根螺钉内固定系统治疗,随访13～32个月(平均25.3个月)。[结果]术前JOA评分平均4.48分的42例患者,随访时14.5分(P<0.01),术后15个月内动态X线检查显示3D椎弓根螺钉固定患者植骨融合率100%,融合节段稳定,临床症状改善优良率92.8%。[结论]后路运用3D内固定系统行椎管后外侧植骨融合内固定对腰椎滑脱症患者是一种安全、有效的术式,近期疗效满意。     

应用输尿管镜放置双J管早期治疗输尿管阴道瘘

Objective To evaluate the clinical effect of placing double J stent using a ureteroscope in early managing ureterovaginal fistula.Methods Twenty-eight patients cases with ureterovaginal fistula from 2002 to 2008 were treated early with placing double J stent using a ureteroscope and the clinical data were reviewed.Results Twenty-two of 28 cases were treated and double J stent was placed in them by a uretero-scope and 75% (21/28)of cases were cured.Four of 21 cases were treated twice by a ureteroscope and were cured finally.7 cases with failure ureterovaginal treatment underwent ureterocystostomy and were cured.The follow-up from 6 months to 33 months (average 10.1±6.4 months)showed that all of the 28 cases had been cured and had no urinary fistula.Conclusion Placing double J stent using a ureteroscope is the first choice of operative procedure for the early treatment of ureterovaginal fistula.     

热休克对小麦未成熟种子萌发、生物发光和抗氧化酶活性的影响

以小麦（Triticum aestivum L.）品种石4185为材料,研究了45 ℃处理0～120 min对小麦未成熟籽粒谷甘胱肽转移酶（GST）、谷胱甘肽还原酶（GR）、过氧化氢酶（CAT）和过氧化物酶（POD）活性, 超微弱发光,种子萌发和愈伤组织诱导的影响.结果表明,热休克处理使未成熟籽粒萌发率、愈伤组织诱导率和GST活性明显增加,且其作用随处理时间的延长而增大;在处理过程中, CAT活性先减少后增加,热休克对GR活性无明显影响.GST的活性与蛋白质质量分数呈显著正相关.     

应用输尿管镜放置双J管早期治疗输尿管阴道瘘

Objective To evaluate the clinical effect of placing double J stent using a ureteroscope in early managing ureterovaginal fistula.Methods Twenty-eight patients cases with ureterovaginal fistula from 2002 to 2008 were treated early with placing double J stent using a ureteroscope and the clinical data were reviewed.Results Twenty-two of 28 cases were treated and double J stent was placed in them by a uretero-scope and 75% (21/28)of cases were cured.Four of 21 cases were treated twice by a ureteroscope and were cured finally.7 cases with failure ureterovaginal treatment underwent ureterocystostomy and were cured.The follow-up from 6 months to 33 months (average 10.1±6.4 months)showed that all of the 28 cases had been cured and had no urinary fistula.Conclusion Placing double J stent using a ureteroscope is the first choice of operative procedure for the early treatment of ureterovaginal fistula.     

Expression of CⅡTA Gene in Five Human Malignant Hematological Cell Lines and Its Significance

The role of MHC class Ⅱ transactivator (CⅡTA) in constitutive or IFN-γ inducib|e expression of HLA molecules in human malignant hematological cell lines was investigated. The expression of HLA molecules and CⅡTA protein was detected by Western blot, immunohistochemistry and flow cytometry. The expression of CⅡTA gene was determined by RT-PCR. The capability of peripheral blood T cell reaction stimulated by tumor cells was monitored by mixed lymphocyte reaction. It was found that the HLA Ⅱ-positive tumor cells expressed the CⅡTA quite well, andthe expression of HLA Ⅰ＋Ⅱ was increased in the tumor cells with constitutive or inducible expression of CⅡTA after induced by IFN-γ. The tumor cells which did not express CⅡTA after in-duced by IFN-γ were not response to the expression of HLA Ⅱ promoted by IFN-γ. It suggests a correlation between the inability of some malignant hematological cell lines in response to IFN-γ for HLA expression and the deficiency in the inducible expression of CⅡTA, indicating CⅡTA might take part in the regu|ation of HLA Ⅰ＋Ⅱ expression in the tumor cells, which might p|ay an important role in tumor immunologic escape.     

视场角设置对虚拟环境中目标判断的影响

目的探讨不同视场角参数对虚拟环境中目标判断的影响规律 ,找出最佳视场角参数。方法利用自行研制基于PC平台的虚拟现实 (VR)实验系统 ,选定 45名年龄在 2 3～ 5 8岁被试者并完成大小与角度判断的实验设计。首先进行 30 0人次的预实验 ,确定引起虚拟环境中目标判断差错的视场角及相应观察任务的差别等级 ,然后开始单因素、4水平的完全随机正式实验。结果方差分析表明 ,不同的虚拟环境视场角对目标判断的真实性有显著性影响 ,当视场角为 60°时 ,目标判断的正确率最大。结论利用VR技术进行载人航天器工效设计、操作训练或其它任务的研究时 ,应考虑视场角的作用 ,适合目标大小判断的视场角参数值宜取 60°,以便获得最大的工效     

青年性前部视网膜劈裂锯齿缘断离及视网膜脱离

目的：探讨青年性前部视网膜劈裂锯齿缘断离及视网膜脱离的临床特点、治疗及其预后。方法：对青年性前部视网膜劈裂锯齿缘断离合并视网膜脱离患者10例20只眼进行常规检眼镜眼底及Goldmann三面镜联合巩膜压陷检查，根据不同情况进行激光光凝，或巩膜冷凝外加压手术治疗，并随访1～5年。结果：共lO例，年龄17～32岁，8例为双眼患病，病变位于颞下，双侧对称。11眼同时患有前部视网膜劈裂、锯齿缘断离及视网膜脱离，3眼患有前部视网膜劈裂及锯齿缘断离，1眼仅有前部视网膜劈裂，3眼仅有锯齿缘断离其中2眼合并视网膜脱离。13眼合并视网膜脱离者采用巩膜冷凝外加压术，全部一次治愈，5眼行激光封闭锯齿缘断离及劈裂区。随访期间未见视网膜脱离，视力均有不同程度提高。结论：青年性前部视网膜劈裂锯齿缘断离及视网膜脱离有典型的临床特点，尽早发现、适宜治疗，预后良好。     

扇形额肌筋膜瓣悬吊治疗上睑下垂

目的：探计上睑下垂的较好治疗方法，以改进治疗效果方法：设计井应用扇形额肌筋膜瓣悬吊治疗上睑下垂，结果应用本方击治疗上睑下垂83倒，126只眼，致采满意。其中43例经3个月-10年随访，除3例(4只眼)下垂复发外，其余均取得了良好效果，未见其他并发症发生。结论：本方法的主要特点是扇形筋膜瓣有丰富的血供，并且能均衡覆盖在睑板上以充分上提上睑，符合生理和解音4的要求。     

星形细胞瘤瘤周水肿区立体定向活检组织的超微结构研究

目的探讨星形细胞瘤瘤周脑水肿的发生机制。方法对15例星形细胞瘤瘤周脑水肿的宽度进行分级：一级0～20mm、二级21～40mm、三级〉40mm。结合CT平扫及增强扫描的影像，应用立体定向技术，对15例星形细胞瘤瘤体、瘤周水肿区及正常脑组织的活检标本进行电镜观察比较。结果CT增强扫描可强化，瘤周脑水肿明显的病人，其瘤体及瘤周水肿区毛细血管超微结构均有不同程度的改变。毛细血管的分布和结构变化，影响着瘤周水肿区的形态，瘤体毛细血管的明显异常，出现于大范围瘤周水肿区的病例。CT增强扫描无强化，瘤周脑水肿不明显的病人，毛细血管超微结构与正常脑组织相似。结论伴有明显瘤周脑水肿的星形细胞瘤，其瘤体及瘤周水肿区毛细血管超微结构均有不同程度的改变，而瘤周水肿的产生，是瘤体及瘤周水肿区毛细血管超微结构改变共同作用的结果。     

短暂性脑缺血发作患者血浆中TXB2和PGF1α含量检测

本文用放射免疫法测定47例短暂性脑缺血发作(TIA)患者血浆中血栓素B_2(TXB_2)和6酮-前列腺F_(1α)(PGF_(1α))的含量。结果发现TIA患者血浆中TXB_2含量增高,PGF_(1α)降低;头颅CT或MRI示有小灶性梗塞者及TIA发作持续时间长于30min者TXB_2升高和PGF_(1α)降低更显著。治疗3个月后,血浆PGF_(1α)显著增高。TXB_2和PGF_(1α)在体内的失平衡是急性脑血管疾病发病的重要机理之一。