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   3367015篇
  免费   272801篇
  国内免费   6032篇
耳鼻咽喉   48517篇
儿科学   107532篇
妇产科学   93030篇
基础医学   474947篇
口腔科学   99455篇
临床医学   306459篇
内科学   652487篇
皮肤病学   70338篇
神经病学   280636篇
特种医学   134303篇
外国民族医学   1247篇
外科学   506918篇
综合类   82914篇
现状与发展   4篇
一般理论   1428篇
预防医学   271902篇
眼科学   79747篇
药学   252273篇
  6篇
中国医学   6248篇
肿瘤学   175457篇
  2018年   33608篇
  2016年   28903篇
  2015年   33040篇
  2014年   46918篇
  2013年   71747篇
  2012年   96447篇
  2011年   102017篇
  2010年   60277篇
  2009年   57541篇
  2008年   97141篇
  2007年   102893篇
  2006年   104043篇
  2005年   101187篇
  2004年   98222篇
  2003年   94538篇
  2002年   93329篇
  2001年   153528篇
  2000年   158997篇
  1999年   134992篇
  1998年   39149篇
  1997年   35495篇
  1996年   34997篇
  1995年   33940篇
  1994年   31930篇
  1993年   29861篇
  1992年   109693篇
  1991年   106071篇
  1990年   102962篇
  1989年   99471篇
  1988年   92461篇
  1987年   91221篇
  1986年   86630篇
  1985年   83057篇
  1984年   63009篇
  1983年   54079篇
  1982年   32662篇
  1981年   29178篇
  1980年   27492篇
  1979年   59843篇
  1978年   42093篇
  1977年   35525篇
  1976年   33315篇
  1975年   35267篇
  1974年   43493篇
  1973年   41542篇
  1972年   38705篇
  1971年   36033篇
  1970年   33645篇
  1969年   31421篇
  1968年   28658篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
41.
42.
43.
44.
45.
46.
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   
47.
48.
49.
50.

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