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   2083077篇
  免费   161098篇
  国内免费   4759篇
耳鼻咽喉   28560篇
儿科学   68055篇
妇产科学   59486篇
基础医学   296092篇
口腔科学   57584篇
临床医学   183659篇
内科学   414771篇
皮肤病学   47193篇
神经病学   170359篇
特种医学   80582篇
外国民族医学   772篇
外科学   317158篇
综合类   47759篇
现状与发展   3篇
一般理论   706篇
预防医学   161257篇
眼科学   47569篇
药学   147787篇
  1篇
中国医学   4640篇
肿瘤学   114941篇
  2019年   16508篇
  2018年   23179篇
  2017年   17872篇
  2016年   19721篇
  2015年   22259篇
  2014年   31679篇
  2013年   47645篇
  2012年   64391篇
  2011年   68473篇
  2010年   40546篇
  2009年   38607篇
  2008年   63698篇
  2007年   67467篇
  2006年   68028篇
  2005年   66314篇
  2004年   63473篇
  2003年   60764篇
  2002年   59019篇
  2001年   100394篇
  2000年   102932篇
  1999年   86188篇
  1998年   24194篇
  1997年   22004篇
  1996年   22014篇
  1995年   20670篇
  1994年   19034篇
  1993年   17919篇
  1992年   65707篇
  1991年   62756篇
  1990年   60761篇
  1989年   58086篇
  1988年   53609篇
  1987年   52488篇
  1986年   49553篇
  1985年   47280篇
  1984年   35807篇
  1983年   30399篇
  1982年   18388篇
  1981年   16214篇
  1979年   32179篇
  1978年   22631篇
  1977年   18911篇
  1976年   17909篇
  1975年   18981篇
  1974年   22834篇
  1973年   21980篇
  1972年   20637篇
  1971年   18904篇
  1970年   18090篇
  1969年   16871篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
141.
142.

Background

Arterial vascular anomalies in patients undergoing kidney transplantation (KT) are correlated with a higher incidence of early surgical complications, potentially causing graft loss. Arterial reconstruction allows patients to overcome these surgical challenges, thus minimizing the risk of poor outcomes. The aim of the present study is to retrospectively investigate the safety and effectiveness of the multiple arterial reconstruction technique with a Teflon patch in case of an unavailable aortic patch: to do so, surgical complications, graft function, and patient survival were evaluated.

Methods

During the period January 2009 to August 2016, 202 adult deceased-donor KTs were performed at our center. Group A (n = 27; reconstruction of multiple arteries) and Group B (n = 175; control group) were compared.

Results

No differences were observed between the 2 groups in terms of early postoperative course, with no vascular complication observed in Group A. No vascular patch infections were reported, nor longer cold ischemia time rates. Similarly, long-term survival rates were similar between the 2 groups.

Conclusions

The Teflon-patch arterial reconstruction technique appears to be safe and effective, with an acceptable balance of benefits and potential risks of using a prosthetic material. Studies based on larger series are needed to further validate this approach.  相似文献   
143.
144.
145.
146.
147.
BackgroundThe aim of this paper is to assess the current state of quality and outcomes measures being reported for hepatic resections in the recent literature.MethodsMedline and PubMed databases were searched for English language articles published between 1 January 2002 and 30 April 2013. Two examiners reviewed each article and relevant citations for appropriateness of inclusion, which excluded papers of liver donor hepatic resections, repeat hepatectomies or meta-analyses. Data were extracted and summarized by two examiners for analysis.ResultsFifty-five studies were identified with suitable reporting to assess peri-operative mortality in hepatic resections. In only 35% (19/55) of the studies was the follow-up time explicitly stated, and in 47% (26/55) of studies peri-operative mortality was limited to in-hospital or 30 days. The time period in which complications were captured was not explicitly stated in 19 out of 28 studies. The remaining studies only captured complications within 30 days of the index operation (8/28). There was a paucity of quality literature addressing truly patient-centred outcomes.ConclusionQuality outcomes after a hepatic resection are inconsistently reported in the literature. Quality outcome studies for a hepatectomy should report mortality and morbidity at a minimum of 90 days after surgery.  相似文献   
148.
149.
150.
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