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   2650875篇
  免费   200000篇
  国内免费   5007篇
耳鼻咽喉   38020篇
儿科学   84320篇
妇产科学   76258篇
基础医学   372912篇
口腔科学   79897篇
临床医学   230465篇
内科学   514294篇
皮肤病学   58505篇
神经病学   213769篇
特种医学   105713篇
外国民族医学   879篇
外科学   405560篇
综合类   64680篇
现状与发展   9篇
一般理论   941篇
预防医学   197470篇
眼科学   62591篇
药学   200145篇
  7篇
中国医学   5399篇
肿瘤学   144048篇
  2018年   24274篇
  2015年   24451篇
  2014年   33967篇
  2013年   52112篇
  2012年   69314篇
  2011年   73230篇
  2010年   43440篇
  2009年   41595篇
  2008年   70250篇
  2007年   75231篇
  2006年   76145篇
  2005年   74061篇
  2004年   72488篇
  2003年   69929篇
  2002年   68674篇
  2001年   122664篇
  2000年   126407篇
  1999年   107671篇
  1998年   29436篇
  1997年   26756篇
  1996年   26244篇
  1995年   25209篇
  1994年   23715篇
  1993年   22237篇
  1992年   86831篇
  1991年   84151篇
  1990年   82408篇
  1989年   80307篇
  1988年   74741篇
  1987年   73589篇
  1986年   70248篇
  1985年   67392篇
  1984年   50499篇
  1983年   43361篇
  1982年   25761篇
  1981年   23333篇
  1980年   21837篇
  1979年   48405篇
  1978年   34160篇
  1977年   29156篇
  1976年   26908篇
  1975年   29401篇
  1974年   35590篇
  1973年   34303篇
  1972年   32131篇
  1971年   30219篇
  1970年   28226篇
  1969年   26814篇
  1968年   24922篇
  1967年   22446篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
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   
5.

Objectives

Expedient extubation after cardiac surgery has been associated with improved outcomes, leading to postoperative extubation frequently during overnight hours. However, recent evidence in a mixed medical-surgical intensive care unit population demonstrated worse outcomes with overnight extubation. This study investigated the impact of overnight extubation in a statewide, multicenter Society of Thoracic Surgeons database.

Methods

Records from 39,812 patients undergoing coronary artery bypass grafting or valve operations (2008-2016) and extubated within 24 hours were stratified according to extubation time between 06:00 and 18:00 (day) or between 18:00 and 6:00 (overnight). Outcomes including reintubation, mortality, and composite morbidity-mortality were evaluated using hierarchical regression models adjusted for Society of Thoracic Surgeons predictive risk scores. To further analyze extubation during the night, a subanalysis stratified patients into 3 groups: 06:00 to 18:00, 18:00 to 24:00, and 24:00 to 06:00.

Results

A total of 20,758 patients were extubated overnight (52.1%) and were slightly older (median age 66 vs 65 years, P < .001) with a longer duration of ventilation (4 vs 7 hours, P < .001). Day and overnight extubation were associated with equivalent operative mortality (1.7% vs 1.7%, P = .880), reintubation (3.7% vs 3.4%, P = .141), and composite morbidity-mortality (8.2% vs 8.0%, P = .314). After risk adjustment, overnight extubation was not associated with any difference in reintubation, mortality, or composite morbidity-mortality. On subanalysis, those extubated between 24:00 and 06:00 exhibited increased composite morbidity-mortality (odds ratio, 1.18; P = .001) but no difference in reintubation or mortality.

Conclusions

Extubation overnight was not associated with increased mortality or reintubation. These results suggest that in the appropriate clinical setting, it is safe to routinely extubate cardiac surgery patients overnight.  相似文献   
6.
7.
8.
9.
10.
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