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   2369660篇
  免费   172536篇
  国内免费   5299篇
耳鼻咽喉   32050篇
儿科学   78016篇
妇产科学   65310篇
基础医学   336473篇
口腔科学   67764篇
临床医学   208841篇
内科学   466696篇
皮肤病学   53072篇
神经病学   185460篇
特种医学   91217篇
外国民族医学   562篇
外科学   363439篇
综合类   53844篇
现状与发展   4篇
一般理论   756篇
预防医学   175188篇
眼科学   56269篇
药学   172257篇
  7篇
中国医学   5682篇
肿瘤学   134588篇
  2019年   18080篇
  2018年   26195篇
  2017年   20079篇
  2016年   21908篇
  2015年   24987篇
  2014年   35054篇
  2013年   52028篇
  2012年   71368篇
  2011年   75392篇
  2010年   45055篇
  2009年   42338篇
  2008年   70727篇
  2007年   75311篇
  2006年   75845篇
  2005年   73017篇
  2004年   70331篇
  2003年   67280篇
  2002年   65322篇
  2001年   119064篇
  2000年   121989篇
  1999年   101620篇
  1998年   27138篇
  1997年   24049篇
  1996年   24091篇
  1995年   22932篇
  1994年   21273篇
  1993年   19718篇
  1992年   77631篇
  1991年   74773篇
  1990年   72263篇
  1989年   69532篇
  1988年   63753篇
  1987年   62322篇
  1986年   59121篇
  1985年   56060篇
  1984年   41555篇
  1983年   35299篇
  1982年   20316篇
  1979年   37193篇
  1978年   25793篇
  1977年   21916篇
  1976年   20445篇
  1975年   21942篇
  1974年   26486篇
  1973年   25488篇
  1972年   23768篇
  1971年   22029篇
  1970年   20709篇
  1969年   19406篇
  1968年   18215篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
71.
72.
73.
74.
75.
76.
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   
77.
78.
79.
80.
Behçet disease is a complex, multisystem disease characterized by recurrent oral and genital ulcerations. It rarely occurs in infants or children. Neonatal Behçet disease has been reported in infants whose ulcers resolve at or before 9 weeks of age. Few cases of neonatal Behçet disease persisting into childhood have previously been reported. We report the case of a 1‐month‐old infant who presented with severe recurrent genital ulcerations and at 6 months developed recurrent oral ulcerations. Her orogenital ulcerations continue to recur. Human leukocyte antigen testing revealed HLA‐B51 and B44 positivity. This is a case of pediatric Behçet disease in the neonatal period. Behçet disease should be considered in the differential diagnosis of recurrent genital and oral ulcerations in infants and children.  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