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   1901815篇
  免费   136629篇
  国内免费   4197篇
耳鼻咽喉   24686篇
儿科学   61950篇
妇产科学   50461篇
基础医学   271086篇
口腔科学   54663篇
临床医学   168183篇
内科学   378896篇
皮肤病学   44066篇
神经病学   149800篇
特种医学   70078篇
外国民族医学   331篇
外科学   283181篇
综合类   39816篇
现状与发展   4篇
一般理论   595篇
预防医学   143900篇
眼科学   44305篇
药学   138330篇
  7篇
中国医学   5143篇
肿瘤学   113160篇
  2021年   16467篇
  2019年   17335篇
  2018年   26628篇
  2017年   19621篇
  2016年   21087篇
  2015年   24003篇
  2014年   31642篇
  2013年   46507篇
  2012年   67435篇
  2011年   70231篇
  2010年   40116篇
  2009年   36228篇
  2008年   63926篇
  2007年   67978篇
  2006年   67468篇
  2005年   64601篇
  2004年   61922篇
  2003年   58436篇
  2002年   56073篇
  2001年   96473篇
  2000年   98392篇
  1999年   81258篇
  1998年   20527篇
  1997年   17958篇
  1996年   18032篇
  1995年   17301篇
  1994年   15809篇
  1993年   14514篇
  1992年   59948篇
  1991年   57629篇
  1990年   55152篇
  1989年   52763篇
  1988年   48146篇
  1987年   46790篇
  1986年   43984篇
  1985年   41565篇
  1984年   30550篇
  1983年   25923篇
  1982年   14500篇
  1979年   26581篇
  1978年   18323篇
  1977年   15596篇
  1976年   14442篇
  1975年   15264篇
  1974年   18513篇
  1973年   17830篇
  1972年   16486篇
  1971年   15286篇
  1970年   14194篇
  1969年   13336篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
71.
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   
72.
Lasers in Medical Science - Studies reported the harmful effects of 2,4-D on body tissues, provoking changes in the anatomy and physiology of the kidneys, liver, and testicles. Thus, the objective...  相似文献   
73.
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   
74.
75.
76.
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   
77.
78.
79.
80.
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