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   1822519篇
  免费   131428篇
  国内免费   4129篇
耳鼻咽喉   23614篇
儿科学   59123篇
妇产科学   49262篇
基础医学   259986篇
口腔科学   53136篇
临床医学   158858篇
内科学   361782篇
皮肤病学   42021篇
神经病学   141795篇
特种医学   67165篇
外国民族医学   243篇
外科学   271575篇
综合类   39567篇
现状与发展   4篇
一般理论   553篇
预防医学   140539篇
眼科学   43721篇
药学   133912篇
  8篇
中国医学   4974篇
肿瘤学   106238篇
  2021年   14811篇
  2019年   15820篇
  2018年   23692篇
  2017年   17608篇
  2016年   19044篇
  2015年   21615篇
  2014年   29284篇
  2013年   42590篇
  2012年   60683篇
  2011年   63858篇
  2010年   36943篇
  2009年   33791篇
  2008年   58327篇
  2007年   62106篇
  2006年   62296篇
  2005年   59203篇
  2004年   56922篇
  2003年   53916篇
  2002年   51898篇
  2001年   95154篇
  2000年   97442篇
  1999年   79879篇
  1998年   20331篇
  1997年   17684篇
  1996年   17795篇
  1995年   17108篇
  1994年   15612篇
  1993年   14314篇
  1992年   59101篇
  1991年   56832篇
  1990年   54517篇
  1989年   52108篇
  1988年   47456篇
  1987年   46183篇
  1986年   43510篇
  1985年   41203篇
  1984年   30191篇
  1983年   25661篇
  1982年   14301篇
  1979年   26565篇
  1978年   18259篇
  1977年   15575篇
  1976年   14493篇
  1975年   15315篇
  1974年   18606篇
  1973年   17934篇
  1972年   16637篇
  1971年   15400篇
  1970年   14312篇
  1969年   13455篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
Obesity Surgery - Laparoscopic sleeve gastrectomy (LSG) is increasingly playing a key role in obesity management. Such operations, however, carry complications sometimes including leaks. The...  相似文献   
65.
BACKGROUND AND PURPOSE:Endovascular therapy for acute ischemic stroke is often performed with the patient under conscious sedation. Emergent conversion from conscious sedation to general anesthesia is sometimes necessary. The aim of this study was to assess the functional outcome in converted patients compared with patients who remained in conscious sedation and to identify predictors associated with the risk of conversion.MATERIALS AND METHODS:Data from 368 patients, included in 3 trials randomizing between conscious sedation and general anesthesia before endovascular therapy (SIESTA, ANSTROKE, and GOLIATH) constituted the study cohort. Twenty-one (11%) of 185 patients randomized to conscious sedation were emergently converted to general anesthesia.RESULTS:Absence of hyperlipidemia seemed to be the strongest predictor of conversion to general anesthesia, albeit a weak predictor (area under curve = 0.62). Sex, hypertension, diabetes, smoking status, atrial fibrillation, blood pressure, size of the infarct, and level and side of the occlusion were not significantly associated with conversion to general anesthesia. Neither age (mean age, 71.3   ± 13.8 years for conscious sedation versus 71.6  ± 12.3 years for converters, P = .58) nor severity of stroke (mean NIHSS score, 17 ± 4 versus 18 ± 4, respectively, P = .27) were significantly different between converters and those who tolerated conscious sedation. The converters had significantly worse outcome with a common odds ratio of 2.67 (P = .015) for a shift toward a higher mRS score compared with the patients remaining in the conscious sedation group.CONCLUSIONS:Patients undergoing conversion had significantly worse outcome compared with patients remaining in conscious sedation. No factor was identified that predicted conversion from conscious sedation to general anesthesia.

Five studies published in 2015 proved the efficacy of endovascular therapy (EVT) for acute ischemic stroke caused by a large-vessel occlusion.1 However, numerous questions remain regarding how to best deliver this treatment, including evaluation of the optimal thrombectomy technique,2 the most effective method of patient triage,3 or whether EVT should be performed with the patient under either general anesthesia (GA) or conscious sedation (CS).Observational studies have suggested that EVT with the patient under CS is associated with better neurologic outcome and lower mortality compared with GA.4 However, 3 randomized trials reported similar outcomes between CS and GA.5-7 Proposed benefits of CS include stable hemodynamics, clinical monitoring, and a potentially shorter procedure. The disadvantages are an unprotected airway and patient movement, which sometimes may require emergent conversion to GA. Patients who need conversion might be sicker (larger strokes, more medical complications), but the conversion procedure itself may also have a potentially deleterious influence on outcome due to the emergent anesthetic induction, associated hypotension, and added time delay before reperfusion.Although most patients can be treated under the less complex CS, it is of interest to identify factors that can predict the risk of conversion and hence the requirement for GA. We undertook a detailed analysis of the patients who were converted from CS to GA in our individual patient data base from the 3 randomized trials to examine the outcome of the converted patients compared with patients who remained in CS. We also aimed to identify possible predictors associated with a need for GA with EVT.  相似文献   
66.
67.
68.
Nevo  N.  Goldstein  A. L.  Staierman  M.  Eran  N.  Carmeli  I.  Rayman  S.  mnouskin  Y. 《Hernia》2022,26(6):1491-1499
Hernia - The minimally invasive surgical repair of combined inguinal and ventral hernias often requires shifting from one approach or plane to another. The traditional enhanced-view totally...  相似文献   
69.
70.
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