全文获取类型
收费全文 | 409篇 |
免费 | 22篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 37篇 |
妇产科学 | 4篇 |
基础医学 | 29篇 |
口腔科学 | 10篇 |
临床医学 | 26篇 |
内科学 | 69篇 |
皮肤病学 | 6篇 |
神经病学 | 7篇 |
特种医学 | 89篇 |
外科学 | 32篇 |
综合类 | 61篇 |
预防医学 | 14篇 |
眼科学 | 11篇 |
药学 | 15篇 |
肿瘤学 | 22篇 |
出版年
2022年 | 6篇 |
2021年 | 4篇 |
2020年 | 5篇 |
2019年 | 2篇 |
2018年 | 8篇 |
2017年 | 6篇 |
2016年 | 7篇 |
2015年 | 16篇 |
2014年 | 4篇 |
2013年 | 7篇 |
2012年 | 12篇 |
2011年 | 14篇 |
2010年 | 20篇 |
2009年 | 15篇 |
2008年 | 10篇 |
2007年 | 12篇 |
2006年 | 14篇 |
2005年 | 17篇 |
2004年 | 5篇 |
2003年 | 5篇 |
2002年 | 14篇 |
2001年 | 9篇 |
2000年 | 6篇 |
1999年 | 11篇 |
1998年 | 29篇 |
1997年 | 23篇 |
1996年 | 18篇 |
1995年 | 15篇 |
1994年 | 12篇 |
1993年 | 9篇 |
1992年 | 3篇 |
1990年 | 1篇 |
1989年 | 14篇 |
1988年 | 11篇 |
1987年 | 15篇 |
1986年 | 11篇 |
1985年 | 5篇 |
1984年 | 5篇 |
1983年 | 6篇 |
1982年 | 5篇 |
1981年 | 5篇 |
1980年 | 5篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 3篇 |
1975年 | 8篇 |
1969年 | 1篇 |
排序方式: 共有435条查询结果,搜索用时 15 毫秒
71.
72.
73.
Intracranial abnormalities in infants treated with extracorporeal membrane oxygenation: imaging with US and CT 总被引:1,自引:0,他引:1
Findings at neuroimaging in 100 consecutive infants treated with extracorporeal membrane oxygenation (ECMO) are presented. Imaging in these infants consisted of pretreatment cranial ultrasonography (US), daily US studies while on ECMO, and follow-up cranial computed tomography (CT) after treatment. There were findings of abnormalities in 43 patients. Thirty had intracranial bleeding, often of unusual extent and distribution. Thirteen additional infants had nonhemorrhagic abnormalities alone. Bleeding considered to be major was seen in 12% of infants. Large parenchymal hemorrhages and infarcts, cerebellar hemorrhages, and diffuse edema were the most significant abnormalities, with a 50% mortality (eight of 16 patients). No lateralization was noted with respect to distribution of bleeding sites or areas of nonhemorrhagic abnormalities. US was a sensitive but imperfect screening tool for intracranial abnormalities. Abnormalities missed with US included peripheral and small parenchymal lesions, subarachnoid hemorrhage, cerebral atrophy, and sagittal sinus thrombosis. 相似文献
74.
EJ Estlin MK Bennett JR Skinner DWA Milligan C Wren 《Acta paediatrica (Oslo, Norway : 1992)》1998,87(12):1304-1306
A female infant born at 28 weeks' gestation was found to have mild hydrops foetalis. Initial echocardiography showed a structurally normal heart. During the first week of life, episodic atrial tachycardia with 1:1 or 2:1 conduction was seen, requiring therapy with digoxin. The infant remained ventilator dependent, with a persistent, chylous pleural effusion which contained a preponderance of lymphocytes. Congenital pulmonary lymphangiectasia (CPL) was confirmed histologically. Worsening episodes of atrial tachycardia, including episodes of atrial fibrillation, were further investigated and a repeat echocardiogram revealed thickening of the entire right atrial wall. The cardiac findings of a thickened right atrial wall with the histological signs of myocarditis were thought to be the cause of paroxysms of atrial fibrillation, an extremely rare arrhythmia in the neonatal period. To the authors' knowledge there have been no previous reports of CPL in association with the cardiac abnormalities described herein. 相似文献
75.
76.
Cerebral venous angiomas: MR imaging 总被引:3,自引:0,他引:3
77.
78.
79.
80.