首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2891519篇
  免费   237287篇
  国内免费   5497篇
耳鼻咽喉   42745篇
儿科学   88455篇
妇产科学   78424篇
基础医学   409428篇
口腔科学   84133篇
临床医学   262247篇
内科学   561317篇
皮肤病学   58827篇
神经病学   243011篇
特种医学   116070篇
外国民族医学   1042篇
外科学   440315篇
综合类   72597篇
现状与发展   3篇
一般理论   1169篇
预防医学   233920篇
眼科学   69460篇
药学   216250篇
  4篇
中国医学   5373篇
肿瘤学   149513篇
  2018年   28636篇
  2016年   24547篇
  2015年   27876篇
  2014年   40244篇
  2013年   61452篇
  2012年   82739篇
  2011年   87242篇
  2010年   51348篇
  2009年   49084篇
  2008年   82765篇
  2007年   88697篇
  2006年   89303篇
  2005年   87170篇
  2004年   84348篇
  2003年   81458篇
  2002年   80179篇
  2001年   130040篇
  2000年   134536篇
  1999年   113927篇
  1998年   33499篇
  1997年   30573篇
  1996年   30137篇
  1995年   29147篇
  1994年   27457篇
  1993年   25578篇
  1992年   93033篇
  1991年   89797篇
  1990年   86910篇
  1989年   83723篇
  1988年   78023篇
  1987年   77034篇
  1986年   72872篇
  1985年   69944篇
  1984年   53441篇
  1983年   45726篇
  1982年   28242篇
  1981年   25246篇
  1980年   23767篇
  1979年   51277篇
  1978年   36328篇
  1977年   30602篇
  1976年   28602篇
  1975年   30333篇
  1974年   37527篇
  1973年   35869篇
  1972年   33637篇
  1971年   31080篇
  1970年   29400篇
  1969年   27647篇
  1968年   25149篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
33.
34.
35.
36.
37.
Academic output is just one aspect of a successful career as a plastic surgeon. However, for those with a strong interest in academia, the academic output of a department will likely be a key factor when deciding how to rank jobs. The aim of this study was to quantify and rank the academic output of plastic surgery units across the UK and Ireland. The Institute for Scientific Information (ISI) Web of Science Bibliometric analysis tool was used to collate cumulative (1950–2016), 10 year (2006–2016) and 3 years (2013–2015) research output data for plastic surgery units in the UK and Ireland. Sixty-six plastic surgery units were identified. Departments were ranked for each time period according to the number of papers produced, number of citations (Nc) and h-index (a measure of the impact of scientific output). The top 3 departments for number of papers in the last 10 years were The Royal Free Hospital, London (226) Broomfield Hospital, Chelmsford (218), and Morriston Hospital and Swansea (188). The top 3 for h-number were The Royal Free Hospital (21) Wythenshawe Hospital, Manchester (18) and Morriston Hospital (17). Academic output varies across plastic surgery units in the UK and Ireland. A number of departments have consistently maintained high academic outputs across the years and will be of interest to surgeons hoping to pursue a career in academia.  相似文献   
38.
39.
40.

Purpose

Endovascular treatment with mechanical thrombectomy devices demonstrated high recanalization rates but functional outcome did not correlate with high rates of recanalization obtained. Patient selection prior to the endovascular treatment is very important in the final outcome of the patient. The primary aim of our study was to evaluate the prognostic value of posterior circulation Alberta Stroke Program Early CT Score (pc-ASPECTS) and Pons-Midbrain Index (PMI) scores in patients with Basilar Artery Occlusion (BAO) treated with successful angiographic recanalization after mechanical thrombectomy.

Methods

Retrospective single-center study including 18 patients between 2008 and 2013 who had acute basilar artery occlusion managed with endovascular treatment within 24 hours from symptoms onset and with successful angiographic recanalization. The patients were initially classified into two groups according to clinical outcome and mortality at 90 days. For analysis we also divided patients into groups based on pc-ASPECTS (≥8vs.< 8) and PMI (≥3vs.< 3) on non-contrast CT (NCCT) and CT Angiography Source Images (CTASI). Imaging data were correlated to clinical outcome and mortality rate.

Results

CTASI pc-ASPECTS, dichotomized at < 8 versus≥8, was associated with a favorable outcome (RR: 2.6; 95% CI: 1.3-5.2) and a reduced risk of death (RR: 6.5: 95% CI: 7.8-23.3). All patients that survived and were functionally independent had pc-ASPECTS score≥8. None of the 5 patients with CTASI pc-ASPECTS score less than 8 survived.

Conclusion

PC-ASPECTS on CTASI is helpful for predicting functional outcome after BAO recanalization with endovascular treatment. These results should be validated in a randomized controlled trial in order to decide whether or not to treat a patient with BAO.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号