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   928260篇
  免费   59164篇
  国内免费   1688篇
耳鼻咽喉   12051篇
儿科学   30064篇
妇产科学   22171篇
基础医学   142292篇
口腔科学   25068篇
临床医学   81660篇
内科学   183198篇
皮肤病学   22042篇
神经病学   69372篇
特种医学   32358篇
外国民族医学   171篇
外科学   132191篇
综合类   15754篇
现状与发展   2篇
一般理论   223篇
预防医学   71565篇
眼科学   20610篇
药学   69470篇
  3篇
中国医学   3003篇
肿瘤学   55844篇
  2021年   8741篇
  2019年   9119篇
  2018年   14859篇
  2017年   10727篇
  2016年   11440篇
  2015年   12751篇
  2014年   15728篇
  2013年   24173篇
  2012年   35901篇
  2011年   36913篇
  2010年   20312篇
  2009年   17667篇
  2008年   33229篇
  2007年   35697篇
  2006年   34930篇
  2005年   33388篇
  2004年   32112篇
  2003年   30022篇
  2002年   28923篇
  2001年   41673篇
  2000年   42339篇
  1999年   35227篇
  1998年   8772篇
  1997年   7383篇
  1996年   7635篇
  1995年   7263篇
  1994年   6647篇
  1992年   25855篇
  1991年   25567篇
  1990年   24788篇
  1989年   24349篇
  1988年   22195篇
  1987年   21442篇
  1986年   20381篇
  1985年   19035篇
  1984年   13990篇
  1983年   11835篇
  1982年   6560篇
  1979年   12655篇
  1978年   8910篇
  1977年   7573篇
  1976年   7178篇
  1975年   8013篇
  1974年   9405篇
  1973年   9063篇
  1972年   8522篇
  1971年   7991篇
  1970年   7695篇
  1969年   7159篇
  1968年   6525篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.
85.
86.
87.
88.

Aims

Variations of the anatomy of donor hepatic arteries increase the number of arterial anastomoses during liver transplantation and, possibly, the incidence of hepatic artery thrombosis (HAT). In this study, we describe the arterial anatomic variations in liver grafts procured and transplanted by a single center in Greece, the techniques of arterial anastomosis, and their effect on the incidence of early HAT.

Materials and Methods

From January 2013 to December 2017, the arterial anatomy of 116 grafts procured for liver transplantation were recorded, as well as the technique of arterial anastomosis and the incidence of early hepatic artery thrombosis (HAT <30 days).

Results

A single hepatic artery was recorded in 72.41% of the procured grafts, an aberrant left hepatic artery (accessory or replaced) in 18 grafts (15.52%), and an aberrant right hepatic artery (accessory or replaced) in 17 grafts (14.66%), while other variations were observed in less than 1% of the procured livers. Of the 116 primary liver transplantations, 6 patients (5.17%) developed early HAT <30 days. Two of these patients (1.72%) had 1 anastomosis of the hepatic artery and 4 (3.45%) had 2 anastomoses due to anatomic variations.

Conclusions

Anatomic variations of the hepatic artery in liver grafts is a common finding and increase the incidence of early HAT but not to a degree to make these grafts unusable.  相似文献   
89.
Hawi  N.  von Falck  C.  Krettek  C.  Meller  R. 《Der Unfallchirurg》2019,122(12):944-949
Die Unfallchirurgie - Zur Diagnostik von Schultergelenkerkrankungen wird routinemäßig die Magnetresonanztomographie (MRT) durchgeführt. Diese kann entsprechend der klinischen...  相似文献   
90.

Introduction

The fast track / ultra-fast-track protocols are techniques used to optimise the patient care process and a quick recovery after cardiac surgery. They are one of the mainstays of efficient practice. With their use, the length of hospital and intensive care unit (ICU) stays are reduced, with a direct impact on costs and the quality of the health service.

Objective

To compare the length of stay in the ICU, length of hospital stay, and post-operative mortality in ultra-fast-track extubated (uFTE) patients and those with conventional extubation (CE) after cardiac surgery.

Methods

Longitudinal, analytical, retrospective study was conducted, with the period between the time of surgery and discharge being included as the study period.

Results

A total of 396 patients older than 18 years who required cardiac surgery were included, of whom 207 patients had (uFTE) and 189 had CE. Although the groups were not comparable due to the statistical differences found, when performing the multivariate adjustment, uFTE maintained its statistical independence and was associated with lower cardiovascular morbidity, such as myocardial ischaemia (95% CI: 0.37-0.86; P = .01) and lower post-surgical vasopressor requirement (95% CI: 0.18-0.49; P < .01). No significant differences were found in the length of hospital stay, ICU stay, or post-operative mortality in the ICU.

Conclusion

Implementing the uFTE strategy, decreases cardiovascular morbidity and vasopressor requirement. The change to uFTE should be accompanied by changes in models and practices in patient recovery to standardised protocols. This study shows that uFTE did not reduce the length of ICU stay, hospital stay, or mortality.  相似文献   
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