全文获取类型
收费全文 | 1531598篇 |
免费 | 111618篇 |
国内免费 | 4690篇 |
专业分类
耳鼻咽喉 | 19459篇 |
儿科学 | 49514篇 |
妇产科学 | 40534篇 |
基础医学 | 227406篇 |
口腔科学 | 40656篇 |
临床医学 | 145668篇 |
内科学 | 300045篇 |
皮肤病学 | 31577篇 |
神经病学 | 129653篇 |
特种医学 | 54773篇 |
外国民族医学 | 447篇 |
外科学 | 208658篇 |
综合类 | 29612篇 |
现状与发展 | 1篇 |
一般理论 | 521篇 |
预防医学 | 132007篇 |
眼科学 | 32964篇 |
药学 | 112974篇 |
6篇 | |
中国医学 | 3741篇 |
肿瘤学 | 87690篇 |
出版年
2021年 | 13876篇 |
2019年 | 14962篇 |
2018年 | 22674篇 |
2017年 | 16481篇 |
2016年 | 17560篇 |
2015年 | 20062篇 |
2014年 | 25748篇 |
2013年 | 39975篇 |
2012年 | 58147篇 |
2011年 | 60835篇 |
2010年 | 33881篇 |
2009年 | 30099篇 |
2008年 | 54572篇 |
2007年 | 57747篇 |
2006年 | 56816篇 |
2005年 | 55137篇 |
2004年 | 52263篇 |
2003年 | 49253篇 |
2002年 | 47425篇 |
2001年 | 64979篇 |
2000年 | 66710篇 |
1999年 | 56038篇 |
1998年 | 15402篇 |
1997年 | 13956篇 |
1996年 | 13754篇 |
1995年 | 13031篇 |
1994年 | 12163篇 |
1993年 | 11411篇 |
1992年 | 43864篇 |
1991年 | 42909篇 |
1990年 | 41466篇 |
1989年 | 39300篇 |
1988年 | 36407篇 |
1987年 | 35387篇 |
1986年 | 33741篇 |
1985年 | 32086篇 |
1984年 | 24117篇 |
1983年 | 20527篇 |
1982年 | 12302篇 |
1979年 | 21752篇 |
1978年 | 15476篇 |
1977年 | 12739篇 |
1976年 | 12438篇 |
1975年 | 12774篇 |
1974年 | 15594篇 |
1973年 | 15284篇 |
1972年 | 14136篇 |
1971年 | 13213篇 |
1970年 | 12202篇 |
1969年 | 11157篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
51.
M.F. Werner A. López-Rueda F.X. Zarco J. Blasco L. San Román S. Amaro E. Carrero R. Valero L. Oleaga J.M. Macho N. Bargalló 《Radiologia》2019,61(2):143-152
Purpose
Endovascular treatment with mechanical thrombectomy devices demonstrated high recanalization rates but functional outcome did not correlate with high rates of recanalization obtained. Patient selection prior to the endovascular treatment is very important in the final outcome of the patient. The primary aim of our study was to evaluate the prognostic value of posterior circulation Alberta Stroke Program Early CT Score (pc-ASPECTS) and Pons-Midbrain Index (PMI) scores in patients with Basilar Artery Occlusion (BAO) treated with successful angiographic recanalization after mechanical thrombectomy.Methods
Retrospective single-center study including 18 patients between 2008 and 2013 who had acute basilar artery occlusion managed with endovascular treatment within 24 hours from symptoms onset and with successful angiographic recanalization. The patients were initially classified into two groups according to clinical outcome and mortality at 90 days. For analysis we also divided patients into groups based on pc-ASPECTS (≥8vs.< 8) and PMI (≥3vs.< 3) on non-contrast CT (NCCT) and CT Angiography Source Images (CTASI). Imaging data were correlated to clinical outcome and mortality rate.Results
CTASI pc-ASPECTS, dichotomized at < 8 versus≥8, was associated with a favorable outcome (RR: 2.6; 95% CI: 1.3-5.2) and a reduced risk of death (RR: 6.5: 95% CI: 7.8-23.3). All patients that survived and were functionally independent had pc-ASPECTS score≥8. None of the 5 patients with CTASI pc-ASPECTS score less than 8 survived.Conclusion
PC-ASPECTS on CTASI is helpful for predicting functional outcome after BAO recanalization with endovascular treatment. These results should be validated in a randomized controlled trial in order to decide whether or not to treat a patient with BAO. 相似文献52.
53.
Ángel Becerra Héctor Trujillo Lucía Valencia Aurelio Rodríguez‐Pérez 《Brazilian Journal of Anesthesiology》2019,69(2):200-203
Background and objectives
A prompt and effective management of trauma patient is necessary. The aim of this case report is to highlight the importance of intraoperative echocardiography as a useful tool in patients suffering from refractory hemodynamic instability no otherwise explained.Case report
A 41 year‐old woman suffered a car accident. At the emergency department, no abnormalities were found in ECG or chest X‐ray. Abdominal ultrasound revealed the presence of abdominal free liquid and the patient was submitted to urgent exploratory laparotomy. Nevertheless, she persisted suffering arterial hypotension and metabolic acidosis. Looking for the reason of her hemodynamic instability, intraoperative transthoracic echocardiography was performed, finding out the presence of pericardial effusion. Once the cardiac surgeon extracted pericardial clots, patient's situation improved clinically and analytically.Conclusion
Every anesthesiologist should be able to use the intraoperative echocardiography as an effective tool in order to establish the appropriate measures to promote the survival of patients suffering severe trauma. 相似文献54.
Notfall + Rettungsmedizin - 相似文献
55.
56.
57.
58.
59.