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   349922篇
  免费   43128篇
  国内免费   2973篇
耳鼻咽喉   7823篇
儿科学   11009篇
妇产科学   6694篇
基础医学   30084篇
口腔科学   5738篇
临床医学   45326篇
内科学   89155篇
皮肤病学   10617篇
神经病学   34932篇
特种医学   13158篇
外国民族医学   16篇
外科学   68770篇
综合类   3039篇
现状与发展   75篇
一般理论   241篇
预防医学   22050篇
眼科学   8595篇
药学   13969篇
中国医学   216篇
肿瘤学   24516篇
  2023年   5367篇
  2022年   2469篇
  2021年   6126篇
  2020年   7736篇
  2019年   5290篇
  2018年   10851篇
  2017年   9746篇
  2016年   11172篇
  2015年   11811篇
  2014年   20455篇
  2013年   23524篇
  2012年   17614篇
  2011年   18504篇
  2010年   17279篇
  2009年   20330篇
  2008年   17998篇
  2007年   17191篇
  2006年   19010篇
  2005年   16708篇
  2004年   15452篇
  2003年   13848篇
  2002年   13603篇
  2001年   6125篇
  2000年   5090篇
  1999年   5541篇
  1998年   6053篇
  1997年   5512篇
  1996年   5118篇
  1995年   4822篇
  1994年   3490篇
  1993年   3110篇
  1992年   3169篇
  1991年   3041篇
  1990年   2488篇
  1989年   2627篇
  1988年   2450篇
  1987年   2212篇
  1986年   2290篇
  1985年   2240篇
  1984年   2258篇
  1983年   2100篇
  1982年   2388篇
  1981年   2099篇
  1980年   1999篇
  1979年   1514篇
  1978年   1506篇
  1977年   1420篇
  1976年   1203篇
  1975年   1084篇
  1974年   1096篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
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   
4.

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   
5.
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