共查询到20条相似文献，搜索用时 550 毫秒
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作者对５６例因各种原因引起的下颌骨节段性缺损者采用大块状生物活性陶瓷人工骨进行同期修复，通过６个月至６年的随访，发现有４５例术后无排异反应，骨与人工骨结合良好，创口Ⅰ期愈合，外形与功能恢复良好．其余病例尽管存在人工骨折断、移位及伤口感染等问题，但毕竟此方法为大段下颌骨缺损的修复提供了一种新手段．本文还就有关手术操作及并发症的防治和人工骨的改良等问题作了讨论 相似文献
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《西藏科技》2021,(8)
目的综合分析并评价腹主动脉瘤腔内修复术与传统开放手术治疗的疗效。方法分开检索中国知网、万方、中国生物医学和百度学术(2013—2020)纳入腹主动脉瘤腔内修复术和开放术治疗的随机对照文献,对符合纳入标准文献用RevMan5.1进行Meta,分析两种手术术中输血量及术后患者住院天数。结果最终列入7项文献患者共696例。Meta分析表明:腔内修复术术中出血量明显少于开放术SMD-2.15,差异有统计学意义(P0.00001),腔内修复术术后住院天数明显少于开方术MD-6.23,差异有统计学意义(P0.00001)。结论患者术中出血量、术后住院天数方面腔内修复术治疗腹主动脉瘤较传统开放手术有明显优势。 相似文献
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目的探讨小切口白内障囊外摘除人工晶体植入的手术方法及临床效果。方法对85眼白内障患者行小切口白内障囊外摘除人工晶体植入,手术结果与同期71眼大切口手术相比较。结果术后视力≥0.5者64眼,占75.3%,术后1月视力≥0.5者71眼,占83.5%,术后一周角膜散光为(1.58±0.85)D,术后1月角膜数光(0.85±0.72)D,与大切口组相比有显著差异(P<0.05)。结论小切口白内障现代囊外摘除手术能显著减少术后角膜散光,手术效果满意,可在基层医院开展。 相似文献
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目的:探讨主动脉夹层动脉瘤患者的围手术期的临床观察和护理。方法:对8例主动脉夹层动脉瘤患者进行围手术期的心理、血压、疼痛等情况进行观察和分析。结果:术前在维持患者的心理、血压稳定的情况下行主动脉腔内修复术。术后准确用药,对患者的疼痛表示理解、同情,使用止痛剂使其安静。8例主动脉夹层动脉瘤腔内修复术患者提供良好的护理,有利于促进患者康复。 相似文献
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目的：对急性阑尾炎行腹腔镜阑尾切除与开腹阑尾切除临床护理进行分析比较。方法将急性阑尾炎行阑尾切除患者随机分为腹腔镜阑尾切除58例与开腹阑尾切除50例两组,对手术时间、术中出血量、术后疼痛程度、术后下床活动时间、术后进食、术后排气、术后应用抗生素时间、住院天数、术后满意率及术后并发症等方面进行观察分析。结果：腹腔镜阑尾切除创伤小、出血少、手术时间短、痛苦小、恢复快、术后并发症少,两组比较差异显著（P〈0．05）。结论：腹腔镜手术减轻了患者的痛苦,为临床护理带来了诸多便利。应不断总结,使护理操作和护理理论在微创技术应用中有一个新的提高。 相似文献
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本文通过对西藏地区近五年来，１８０余例肝包囊虫病的手术配合，从而提出术中几方面的体会。首先，从术前准备到手术体位和麻醉以及术中配合的具体方法，包囊液及包囊壁的处理；术中、术后的注意事项，通过进行简单介绍，说明对特殊感染手术，应严格执行手术操作规程和无菌技术，是手术成功的先决条件；同时，也是预防交叉感染及术中意外的可靠保障。以便在今后的肝包囊虫病的手术过程中，进一步的探索，以至更加完善。 相似文献
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近年来，随着微创、精准医疗及加速康复外科（Enhanced Recovery After Surgery,ERAS）理念的普及，脊柱微创手术飞速发展。精准安全的椎弓根置钉直接影响到脊柱手术成败。传统徒手置钉的准确率不高，C臂透视时间长，多次反复穿刺易破坏椎体正常骨质。骨科机器人辅助脊柱手术拥有无限想象前景，不仅提高了椎弓根螺钉置入的精准度和手术安全性，也可以节省医师培训时间，缩短操作熟悉过程。同时，ERAS理念在脊柱微创手术的运用，能最大程度地降低围手术期相关并发症的发生几率，从而提高术后恢复率。骨科手术机器人的优势在于加快了患者围手术期的康复进程，与ERAS理念不谋而合，目前已经成为广大脊柱外科医师研究的热点。 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
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Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
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Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献