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   2527354篇
  免费   194071篇
  国内免费   5475篇
耳鼻咽喉   34644篇
儿科学   82834篇
妇产科学   71708篇
基础医学   363548篇
口腔科学   70001篇
临床医学   225199篇
内科学   497851篇
皮肤病学   56205篇
神经病学   205330篇
特种医学   97575篇
外国民族医学   799篇
外科学   382724篇
综合类   55682篇
现状与发展   6篇
一般理论   884篇
预防医学   195033篇
眼科学   57874篇
药学   185397篇
  3篇
中国医学   5424篇
肿瘤学   138179篇
  2019年   20113篇
  2018年   28509篇
  2017年   21844篇
  2016年   24678篇
  2015年   27713篇
  2014年   38786篇
  2013年   58193篇
  2012年   79792篇
  2011年   85144篇
  2010年   49944篇
  2009年   47111篇
  2008年   79936篇
  2007年   85255篇
  2006年   85823篇
  2005年   83878篇
  2004年   80395篇
  2003年   77009篇
  2002年   74856篇
  2001年   114809篇
  2000年   117359篇
  1999年   98847篇
  1998年   29541篇
  1997年   26427篇
  1996年   26321篇
  1995年   24961篇
  1994年   22967篇
  1993年   21611篇
  1992年   76463篇
  1991年   74160篇
  1990年   72147篇
  1989年   69584篇
  1988年   64266篇
  1987年   62996篇
  1986年   59424篇
  1985年   56828篇
  1984年   43101篇
  1983年   37000篇
  1982年   22608篇
  1981年   20136篇
  1979年   39251篇
  1978年   27894篇
  1977年   23625篇
  1976年   22397篇
  1975年   23839篇
  1974年   28283篇
  1973年   27266篇
  1972年   25728篇
  1971年   23649篇
  1970年   22281篇
  1969年   21063篇
排序方式: 共有10000条查询结果,搜索用时 359 毫秒
81.
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   
82.
83.
84.
85.
86.
87.
88.
89.
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   
90.
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