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   1606073篇
  免费   131855篇
  国内免费   2578篇
耳鼻咽喉   21705篇
儿科学   53044篇
妇产科学   46306篇
基础医学   228094篇
口腔科学   47307篇
临床医学   141581篇
内科学   315832篇
皮肤病学   34113篇
神经病学   130535篇
特种医学   64974篇
外国民族医学   475篇
外科学   244171篇
综合类   39799篇
现状与发展   3篇
一般理论   544篇
预防医学   123170篇
眼科学   36563篇
药学   121575篇
  33篇
中国医学   2977篇
肿瘤学   87705篇
  2018年   14838篇
  2016年   12945篇
  2015年   15097篇
  2014年   20740篇
  2013年   31476篇
  2012年   42721篇
  2011年   44940篇
  2010年   26428篇
  2009年   25389篇
  2008年   43135篇
  2007年   45411篇
  2006年   46228篇
  2005年   44809篇
  2004年   44237篇
  2003年   42322篇
  2002年   41437篇
  2001年   75776篇
  2000年   78416篇
  1999年   66463篇
  1998年   17769篇
  1997年   16359篇
  1996年   16347篇
  1995年   16043篇
  1994年   15101篇
  1993年   14234篇
  1992年   55479篇
  1991年   53828篇
  1990年   52617篇
  1989年   50883篇
  1988年   47271篇
  1987年   46600篇
  1986年   44340篇
  1985年   42892篇
  1984年   32066篇
  1983年   27593篇
  1982年   16169篇
  1981年   14450篇
  1980年   13585篇
  1979年   30493篇
  1978年   21084篇
  1977年   17779篇
  1976年   16714篇
  1975年   17586篇
  1974年   21504篇
  1973年   20685篇
  1972年   18869篇
  1971年   17781篇
  1970年   16300篇
  1969年   15277篇
  1968年   13971篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.
995.
OBJECTIVES: Angioplasty is often used in the management of lower limb ischaemia and can reduce the need for infrainguinal bypass in some patients. There is an associated failure rate with this technique and bypass surgery is often used in this situation as a secondary limb salvage procedure. We aimed to evaluate the outcome of infrainguinal bypass grafting following failed attempt at angioplasty. METHODS: All cases of infrainguinal bypass at a single centre over a seven year period were identified and notes reviewed. Cases were divided into four groups according to their indication for surgery; acute ischaemia, chronic critical ischaemia, failed angioplasty and an 'other' group including aneurysmal disease and claudicants. The failed angioplasty group was compared with the other three groups. Survival analysis was performed using Kaplan Meier curves and groups compared in terms of long term patency and survival. RESULTS: Primary patency was 61.2% in the failed angioplasty group at 12 months compared with 60.6% in the other groups (P=1.11). There was also no significant difference in primary patency at 60 months (50% vs 40.6%, P=0.26). Survival at 12 months was also comparable between the groups (failed angioplasty group 74.2% compared with 77.3% in the other groups, P=0.662) as was 60 months survival (33.3% and 35.4% respectively, P=0.166). DISCUSSION: In this study, outcome of infrainguinal bypass following failed angioplasty was comparable to outcome of surgery performed for another indication. This paper supports the use of distal bypass surgery for limb salvage in cases where minimal access techniques have failed.  相似文献   
996.
997.
P Hildebrand  U J Roblick  R Keller  M Kleemann  L Mirow  H-P Bruch 《Der Chirurg》2007,78(6):494, 496-494, 500
Minimizing the access trauma of surgical interventions is becoming an essential task in modern surgery in order to make the treatment more comfortable for the patient. Minimally invasive surgery has had a major impact on the improvement of surgical results over the last decade. This is why such surgery is often named as the third patient friendly revolution in surgery after the introduction of asepsis and anesthesia. Operations that caused a huge strain on the patients in the past and led to immense costs for society because of the patient's lost working time and extensive rehabilitation, have lost their fear thanks to this technique. The physical strain is lower, the cosmetic effect is considerable and the costs for society might be reduced due to the significantly shorter duration of convalescence.Despite its known advantages, which have been reported in numerous studies, minimally invasive surgery has recently gained increased interest because of the installation of new accounting systems as well as strict budgeting and restricted resources.Realistic cost-benefit analysis and objectified quality controls are needed in order to guarantee innovative and patient friendly basic approaches in medicine in the future.  相似文献   
998.
999.
1000.
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