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   2695257篇
  免费   193554篇
  国内免费   7845篇
耳鼻咽喉   36258篇
儿科学   89507篇
妇产科学   74625篇
基础医学   379951篇
口腔科学   73326篇
临床医学   242984篇
内科学   534984篇
皮肤病学   65517篇
神经病学   223342篇
特种医学   105581篇
外国民族医学   752篇
外科学   403857篇
综合类   51244篇
现状与发展   5篇
一般理论   989篇
预防医学   201806篇
眼科学   59950篇
药学   196181篇
  8篇
中国医学   5614篇
肿瘤学   150175篇
  2021年   21038篇
  2019年   21675篇
  2018年   31272篇
  2017年   24185篇
  2016年   28417篇
  2015年   31909篇
  2014年   43036篇
  2013年   64126篇
  2012年   85797篇
  2011年   89908篇
  2010年   54240篇
  2009年   51792篇
  2008年   84262篇
  2007年   89702篇
  2006年   91492篇
  2005年   87985篇
  2004年   84547篇
  2003年   81795篇
  2002年   78984篇
  2001年   131227篇
  2000年   134107篇
  1999年   113061篇
  1998年   32310篇
  1997年   28747篇
  1996年   28873篇
  1995年   27969篇
  1994年   25569篇
  1993年   23905篇
  1992年   86375篇
  1991年   82784篇
  1990年   80040篇
  1989年   77247篇
  1988年   70540篇
  1987年   69002篇
  1986年   64537篇
  1985年   61472篇
  1984年   45698篇
  1983年   38606篇
  1982年   22939篇
  1981年   20412篇
  1979年   39858篇
  1978年   28094篇
  1977年   23797篇
  1976年   21994篇
  1975年   23548篇
  1974年   27525篇
  1973年   26062篇
  1972年   24430篇
  1971年   22622篇
  1970年   20780篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
65.
66.

Introduction

Compression fractures of the cuboid bone in children and adolescents are rare. Fracture morphology, associated lesions, treatment options and long-term outcomes of this very rare injury are published in a few case reports. This study with review of the literature aims to support the understanding of fracture pattern and optimize pathways of decision making.

Material and Methods

A retrospective two-center study was performed in a patient cohort treated between 2001 and 2016. All patients aged less than 18 years who sustained a cuboid fracture were included. Age, gender, mechanism of injury, fracture morphology, amount of displacement, associated injuries, and therapy were analyzed. In the follow-up (FU), the AOFAS Midfoot Scale was investigated.

Results

Fractures of the cuboid bone were diagnosed in 7 boys and 9 girls. The mean age of the patients was 10 years (range: 2.2–16.1 years). According to the classification of Fenton we detected 11 (69%) type 2, 2 (12%) type 3 and 3 (19%) type 5b fractures. Other fracture types according to Fenton were not observed. All children under 10 years sustained a type 2 fracture. Open reduction and internal fixation was performed in 5 (31%) patients. Bone grafting was not necessary. FU was performed in 14/16 patients on average after 9 years (mean; range: 1.4–16.2 years). The mean AOFAS Midfoot Scale at FU for extra-articular type 2 fractures was 100 points, whereas in intra-articular fractures (Type 3) and fractures associated with mid-tarsal disruption (type 5b) worse results were found (95 and 66 points, accordingly).

Conclusion

This rare injury shows inhomogenous morphologies and offers different treatment approaches. Extra-articular Fenton type 2 lesions are the most common type of cuboid fracture in children (69%). A potential loss of length of the lateral column must be considered. In contrast to adults, type 1, 4, and 5a fractures were not found in our cohort of children and adolescents. Lower scores of the AOFAS Midfoot Scale were found with either intra-articular involvement or associated midfoot lesions.  相似文献   
67.

Objectives

Expedient extubation after cardiac surgery has been associated with improved outcomes, leading to postoperative extubation frequently during overnight hours. However, recent evidence in a mixed medical-surgical intensive care unit population demonstrated worse outcomes with overnight extubation. This study investigated the impact of overnight extubation in a statewide, multicenter Society of Thoracic Surgeons database.

Methods

Records from 39,812 patients undergoing coronary artery bypass grafting or valve operations (2008-2016) and extubated within 24 hours were stratified according to extubation time between 06:00 and 18:00 (day) or between 18:00 and 6:00 (overnight). Outcomes including reintubation, mortality, and composite morbidity-mortality were evaluated using hierarchical regression models adjusted for Society of Thoracic Surgeons predictive risk scores. To further analyze extubation during the night, a subanalysis stratified patients into 3 groups: 06:00 to 18:00, 18:00 to 24:00, and 24:00 to 06:00.

Results

A total of 20,758 patients were extubated overnight (52.1%) and were slightly older (median age 66 vs 65 years, P < .001) with a longer duration of ventilation (4 vs 7 hours, P < .001). Day and overnight extubation were associated with equivalent operative mortality (1.7% vs 1.7%, P = .880), reintubation (3.7% vs 3.4%, P = .141), and composite morbidity-mortality (8.2% vs 8.0%, P = .314). After risk adjustment, overnight extubation was not associated with any difference in reintubation, mortality, or composite morbidity-mortality. On subanalysis, those extubated between 24:00 and 06:00 exhibited increased composite morbidity-mortality (odds ratio, 1.18; P = .001) but no difference in reintubation or mortality.

Conclusions

Extubation overnight was not associated with increased mortality or reintubation. These results suggest that in the appropriate clinical setting, it is safe to routinely extubate cardiac surgery patients overnight.  相似文献   
68.
69.
70.
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