全文获取类型
收费全文 | 1616篇 |
免费 | 6篇 |
专业分类
耳鼻咽喉 | 5篇 |
儿科学 | 246篇 |
妇产科学 | 47篇 |
基础医学 | 175篇 |
口腔科学 | 33篇 |
临床医学 | 76篇 |
内科学 | 359篇 |
皮肤病学 | 55篇 |
神经病学 | 73篇 |
特种医学 | 38篇 |
外科学 | 332篇 |
综合类 | 12篇 |
预防医学 | 46篇 |
眼科学 | 30篇 |
药学 | 26篇 |
中国医学 | 5篇 |
肿瘤学 | 64篇 |
出版年
2023年 | 3篇 |
2022年 | 3篇 |
2021年 | 21篇 |
2020年 | 3篇 |
2019年 | 268篇 |
2018年 | 187篇 |
2017年 | 107篇 |
2016年 | 1篇 |
2015年 | 2篇 |
2014年 | 3篇 |
2013年 | 9篇 |
2012年 | 5篇 |
2011年 | 3篇 |
2010年 | 5篇 |
2009年 | 6篇 |
2008年 | 8篇 |
2007年 | 2篇 |
2006年 | 1篇 |
2005年 | 3篇 |
2004年 | 3篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 3篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 3篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1985年 | 84篇 |
1984年 | 106篇 |
1983年 | 63篇 |
1982年 | 92篇 |
1981年 | 106篇 |
1980年 | 80篇 |
1979年 | 70篇 |
1978年 | 91篇 |
1977年 | 61篇 |
1976年 | 71篇 |
1975年 | 47篇 |
1974年 | 39篇 |
1973年 | 46篇 |
1972年 | 1篇 |
排序方式: 共有1622条查询结果,搜索用时 31 毫秒
21.
22.
23.
24.
25.
26.
27.
28.
Matthew C. Hiemenz Dejerianne G. Ostrow Tracy M. Busse Jonathan Buckley Dennis T. Maglinte Moiz Bootwalla James Done Jianling Ji Gordana Raca Alex Ryutov Xinjie Xu Chao Jie Zhen Jeffrey M. Conroy Florette K. Hazard Joshua L. Deignan Beverly B. Rogers Amanda L. Treece David M. Parham Jaclyn A. Biegel 《The Journal of molecular diagnostics : JMD》2018,20(6):765-776
29.
Joseph B. Miller Alexander Lee Julian P. Suszanski Madison Tustian Jessica Levely Corcoran Steven Moore Lauren Rodriguez Christopher A. Lewandowski 《The American journal of emergency medicine》2018,36(6):1018-1021
Introduction
Retrospective data indicates that dehydration in acute ischemic stroke patients may be common, even though these patients frequently have elevated blood pressure. We sought to evaluate clinical and laboratory measures of intravascular volume status compared to more objective measures using ultrasound measurements of the inferior vena cava (IVC).Methods
This was a prospective observation study of acute ischemic stroke patients in the emergency department. Patients with NIH stroke scale ≥4 within 12?h of symptom onset were included. A trained ultrasonographer performed bi-dimensional imaging of the IVC with passive respiration to determine the percent inspiratory collapse and maximum diameter. We defined low intravascular volume as >50% IVC collapse and a maximal diameter?<?2.1?cm. Analysis was limited to patients with confirmed ischemic stroke.Results
There were 42 patients, of whom 31 had confirmed acute ischemic stroke. The mean age was 65?±?15?years, 52% were female, and 71% were hypertensive. The median NIH stroke scale score was 7 (IQR 5–15). Based on IVC ultrasound, low intravascular volume was present in 63% (95% CI 44–80%) of patients. A higher proportion of hypertensive patients had low intrasvascular volume (72% vs. 33%). There was poor correlation between IVC assessment of intrasvascular volume and blinded clinician assessment or laboratory markers of dehydration.Conclusion
The majority of ED acute ischemic stroke patients in this sample were hypertensive and demonstrated low intravascular volume based on IVC ultrasound. 相似文献30.
Comparison of methicillin-resistant and methicillin-sensitive Staphylococcus aureus bacteremia 总被引:1,自引:0,他引:1
Methicillin-resistant Staphylococcus aureus (MRSA) has become endemic in Detroit, accounting for 50% of bacteremias in heroin abusers. To identify the salient epidemiologic and clinical features of MRSA bacteremia, case-control studies were performed comparing 28 cases of MRSA bacteremia to 28 cases of methicillin-sensitive S. aureus (MSSA) bacteremia in intravenous drug abusers. Infective endocarditis was diagnosed in 46.4% (13 of 28). In endocarditis and nonendocarditis bacteremia alike, the duration of fever, length of hospitalization, need for surgery, and mortality rates were similar. A history of recent antimicrobial therapy, especially cephalosporins, was more common in the MRSA group (p = 0.006). Complications including neurologic, renal, vascular, and musculoskeletal manifestations were more common in the MSSA endocarditis patients than MRSA endocarditis patients, although this difference was not significant. Complications related to antibiotic therapy were similar for both groups. The case-control studies indicate that MRSA and MSSA are similar in their virulence as measured by duration of hospitalization, duration of fever, complications, and mortality. 相似文献