全文获取类型
收费全文 | 1551506篇 |
免费 | 125839篇 |
国内免费 | 8210篇 |
专业分类
耳鼻咽喉 | 20217篇 |
儿科学 | 49687篇 |
妇产科学 | 45550篇 |
基础医学 | 221072篇 |
口腔科学 | 41533篇 |
临床医学 | 139797篇 |
内科学 | 306772篇 |
皮肤病学 | 35906篇 |
神经病学 | 125579篇 |
特种医学 | 59171篇 |
外国民族医学 | 519篇 |
外科学 | 229124篇 |
综合类 | 44667篇 |
现状与发展 | 22篇 |
一般理论 | 523篇 |
预防医学 | 120139篇 |
眼科学 | 35338篇 |
药学 | 112483篇 |
62篇 | |
中国医学 | 6853篇 |
肿瘤学 | 90541篇 |
出版年
2021年 | 12967篇 |
2019年 | 14451篇 |
2018年 | 19883篇 |
2017年 | 15324篇 |
2016年 | 16910篇 |
2015年 | 19644篇 |
2014年 | 27138篇 |
2013年 | 37953篇 |
2012年 | 52271篇 |
2011年 | 55560篇 |
2010年 | 32716篇 |
2009年 | 30750篇 |
2008年 | 49842篇 |
2007年 | 52626篇 |
2006年 | 53175篇 |
2005年 | 51324篇 |
2004年 | 48040篇 |
2003年 | 45726篇 |
2002年 | 43867篇 |
2001年 | 78944篇 |
2000年 | 80659篇 |
1999年 | 66749篇 |
1998年 | 18343篇 |
1997年 | 16284篇 |
1996年 | 15870篇 |
1995年 | 15932篇 |
1994年 | 14454篇 |
1993年 | 13452篇 |
1992年 | 49171篇 |
1991年 | 46898篇 |
1990年 | 44710篇 |
1989年 | 42769篇 |
1988年 | 39236篇 |
1987年 | 38209篇 |
1986年 | 35602篇 |
1985年 | 33934篇 |
1984年 | 25654篇 |
1983年 | 21587篇 |
1982年 | 13022篇 |
1981年 | 11482篇 |
1979年 | 22447篇 |
1978年 | 15646篇 |
1977年 | 12948篇 |
1976年 | 12173篇 |
1975年 | 12718篇 |
1974年 | 15276篇 |
1973年 | 14845篇 |
1972年 | 13936篇 |
1971年 | 12658篇 |
1970年 | 11972篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Post-induction hypotension is common and associated with postoperative complications. We hypothesised that pneumatic leg compression reduces post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy. In this double-blind randomised study, patients were allocated randomly to the pneumatic leg compression group (n = 50) or control (n = 50). In the intervention group, pneumatic leg compression was initiated before induction of anaesthesia. In the control group, pneumatic leg compression was initiated 20 min after anaesthesia induction. The primary outcome was the incidence of post-induction hypotension in these groups. Post-induction hypotension was defined as systolic blood pressure < 90 mmHg during the first 20 min after induction. Haemodynamic variables and area under the curve of post-induction systolic blood pressure over time were assessed. Complications associated with pneumatic leg compression were recorded, including: peripheral neuropathy; compartment syndrome; extensive bullae beneath the leg sleeves; and pulmonary thromboembolism. The incidence of post-induction hypotension decreased in the pneumatic leg compression group compared with that in the control group; 5 (10%) vs. 29 (58%), respectively, p < 0.001. In the pneumatic leg compression group, the lowest systolic, diastolic and mean blood pressures 20 min after induction of anaesthesia were significantly greater than the control group. Pneumatic leg compression resulted in an increased area under the curve of systolic blood pressure in the first 20 min after induction, p = 0.001. There were no pneumatic leg compression-related complications. Pneumatic leg compression reduced post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy, suggesting that it is an effective and safe intervention to prevent post-induction hypotension among elderly patients undergoing general anaesthesia. 相似文献
2.
Deitelzweig Steve Luo Xuemei Nguyen Jennifer L. Malhotra Deepa Emir Birol Russ Cristina Li Xiaoyan Lee Theodore C. Ferri Mauricio Wiederkehr Danny Reimbaeva Maya Barnes Geoffrey D. Piazza Gregory 《Journal of thrombosis and thrombolysis》2022,54(4):696-696
Journal of Thrombosis and Thrombolysis - 相似文献
3.
Major depressive disorder is a serious and common neuropsychiatric disorder that affects more than 350 million people worldwide. Electroconvulsive therapy is the oldest and most effective treatment available for the treatment of severe major depressive disorder. Electroconvulsive therapy modifies structural network changes in patients with major depressive disorder and schizophrenia. And it can also affect neuroinflammatory responses and may have neuroprotective effects. Electroconvulsive therapy plays an irreplaceable role in the treatment of major depressive disorder. 相似文献
4.
5.
6.
7.
White and brown adipose tissue functionality is impaired by fine particulate matter (PM2.5) exposure
Della Guardia Lucio Shin Andrew C. 《Journal of molecular medicine (Berlin, Germany)》2022,100(5):665-676
Journal of Molecular Medicine - Chronic exposure to high levels of particulate matter (PM) is correlated to a higher prevalence of cardio-metabolic disturbances. Adipose tissue represents a pivotal... 相似文献
8.
9.
采用文献复习和实证研究经验的方法对《医疗质量管理办法》中涉及的医疗质量概念及相关问题进行探讨。《医疗质量管理办法》中的医疗质量的定义存在重大缺失,没有涉及医疗服务的结果,特别是患者安全。医疗质量的定义应与国际相关权威机构保持一致,应高度重视医疗服务的结果,特别是患者安全。 相似文献
10.