全文获取类型
收费全文 | 80019篇 |
免费 | 5709篇 |
国内免费 | 1696篇 |
专业分类
耳鼻咽喉 | 105篇 |
儿科学 | 2002篇 |
妇产科学 | 725篇 |
基础医学 | 3404篇 |
口腔科学 | 505篇 |
临床医学 | 13132篇 |
内科学 | 30740篇 |
皮肤病学 | 184篇 |
神经病学 | 1098篇 |
特种医学 | 1792篇 |
外国民族医学 | 1篇 |
外科学 | 9096篇 |
综合类 | 12009篇 |
现状与发展 | 4篇 |
一般理论 | 1篇 |
预防医学 | 2553篇 |
眼科学 | 90篇 |
药学 | 6218篇 |
56篇 | |
中国医学 | 3069篇 |
肿瘤学 | 640篇 |
出版年
2024年 | 96篇 |
2023年 | 1353篇 |
2022年 | 1760篇 |
2021年 | 3322篇 |
2020年 | 3216篇 |
2019年 | 3109篇 |
2018年 | 2923篇 |
2017年 | 2408篇 |
2016年 | 2360篇 |
2015年 | 2650篇 |
2014年 | 5582篇 |
2013年 | 5569篇 |
2012年 | 4133篇 |
2011年 | 4891篇 |
2010年 | 3951篇 |
2009年 | 3911篇 |
2008年 | 3934篇 |
2007年 | 4031篇 |
2006年 | 3558篇 |
2005年 | 3323篇 |
2004年 | 2582篇 |
2003年 | 2244篇 |
2002年 | 1870篇 |
2001年 | 1836篇 |
2000年 | 1396篇 |
1999年 | 1314篇 |
1998年 | 1115篇 |
1997年 | 1083篇 |
1996年 | 931篇 |
1995年 | 837篇 |
1994年 | 812篇 |
1993年 | 635篇 |
1992年 | 584篇 |
1991年 | 570篇 |
1990年 | 485篇 |
1989年 | 410篇 |
1988年 | 400篇 |
1987年 | 333篇 |
1986年 | 296篇 |
1985年 | 288篇 |
1984年 | 277篇 |
1983年 | 185篇 |
1982年 | 188篇 |
1981年 | 145篇 |
1980年 | 127篇 |
1979年 | 112篇 |
1978年 | 84篇 |
1977年 | 53篇 |
1976年 | 56篇 |
1973年 | 27篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
91.
92.
93.
94.
Leonardo Jönck Staub Roberta Rodolfo Mazzali Biscaro Erikson Kaszubowski Rosemeri Maurici 《The Journal of emergency medicine》2019,56(1):53-69
Background
Lung ultrasound can accelerate the diagnosis of life-threatening diseases in adults with respiratory symptoms.Objective
Systematically review the accuracy of lung ultrasonography (LUS) for emergency diagnosis of pneumonia, acute heart failure, and exacerbation of chronic obstructive pulmonary disease (COPD)/asthma in adults.Methods
PubMed, Embase, Scopus, Web of Science, and LILACS (Literatura Latino Americana e do Caribe em Ciências da Saúde; until 2016) were searched for prospective diagnostic accuracy studies. Rutter-Gatsonis hierarchical summary receiver operating characteristic method was used to measure the overall accuracy of LUS and Reitsma bivariate model to measure the accuracy of the different sonographic signs. This review was previously registered in PROSPERO (Centre for Reviews and Dissemination, University of York, York, UK; CRD42016048085).Results
Twenty-five studies were included: 14 assessing pneumonia, 14 assessing acute heart failure, and four assessing exacerbations of COPD/asthma. The area under the summary receiver operating characteristic curve of LUS was 0.948 for pneumonia, 0.914 for acute heart failure, and 0.906 for exacerbations of COPD/asthma. In patients suspected to have pneumonia, consolidation had sensitivity of 0.82 (95% confidence interval [CI] 0.74–0.88) and specificity of 0.94 (95% CI 0.85–0.98) for this disease. In acutely dyspneic patients, modified diffuse interstitial syndrome had sensitivity of 0.90 (95% CI 0.87–0.93) and specificity of 0.93 (95% CI 0.91–0.95) for acute heart failure, whereas B-profile had sensitivity of 0.93 (95% CI 0.72–0.98) and specificity of 0.92 (95% CI 0.79–0.97) for this disease in patients with respiratory failure. In patients with acute dyspnea or respiratory failure, the A-profile without PLAPS (posterior-lateral alveolar pleural syndrome) had sensitivity of 0.78 (95% CI 0.67–0.86) and specificity of 0.94 (95% CI 0.89–0.97) for exacerbations of COPD/asthma.Conclusion
Lung ultrasound is an accurate tool for the emergency diagnosis of pneumonia, acute heart failure, and exacerbations of COPD/asthma. 相似文献95.
96.
Oral Everolimus for Treatment of a Giant Left Ventricular Rhabdomyoma in a Neonate—Rapid Tumor Regression Documented by Real Time 3D Echocardiography 下载免费PDF全文
Robert Wagner M.D. Ph.D. Frank Thomas Riede M.D. Hiroshi Seki M.D. Frauke Hornemann M.D. Steffen Syrbe M.D. Ingo Daehnert M.D. Ph.D. Michael Weidenbach M.D. Ph.D. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(12):1876-1879
The presented case reports on successful treatment with everolimus in a neonate with left ventricular giant rhabdomyoma. The authors used a different dosage regime compared to literature and documented rapid tumor regression by 3D echocardiography. 相似文献
97.
98.
99.
Rationale:The prone position is commonly used in spinal surgery. There have been many studies on hemodynamic changes in the prone position during general anesthesia. We report a rare case of transient left bundle branch block (LBBB) in a prone position.Patient concern:Electrocardiogram (ECG) of a 64-year-old man scheduled for spinal surgery showed normal sinus rhythm change to LBBB after posture change to the prone position.Diagnosis:Twelve lead ECG revealed LBBB. His coronary angio-computed tomography results showed right coronary artery with 30% to 40% stenosis and left circumflex artery with 40% to 50% stenosis. The patient was diagnosed with stable angina and second-degree atrioventricular block of Mobitz type II.Intervention:Nitroglycerin was administered intravenously during surgery. Adequate oxygen was supplied to the patient. After surgery, the patient was prescribed clopidogrel, statins, angiotensin II receptor blocker, and a permanent pacemaker was inserted.Outcome:Surgery was completed without complications. After surgery, the transient LBBB changed to a normal sinus rhythm. The patient did not complain of chest pain or dyspnea.Lesson:The prone position causes significant hemodynamic changes. A high risk of cardiovascular disease may cause ischemic heart disease and ECG changes. Therefore, careful management is necessary. 相似文献
100.
组织多普勒成像评价左房收缩功能的临床研究 总被引:1,自引:0,他引:1
目的应用多普勒组织成像技术测定61名健康成人二尖瓣环运动峰值速率(Am),以评价Am在左房收缩功能中的价值。方法观察61名无心脏疾患者的Am,Am值为二尖瓣前、后、左、右侧心房收缩期二尖瓣环运动峰值速率的平均值;并与左房收缩时左房面积改变分数(FAC)和容积改变分数(FVC)作相关性研究。结果61例研究对象平均FAC和FVC分别为(31±10)%和(42±11)%;Am为(13.4±3.2)cm/s;直线回归分析显示,Am与FAC和FVC均呈正相关(r=0.78和0.82;P均<0.001)。结论Am与FAC、FVC具有良好相关性,从而为临床评价左房收缩功能提供了一种简便而快速的方法。 相似文献