全文获取类型
收费全文 | 1931篇 |
免费 | 170篇 |
国内免费 | 22篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 75篇 |
妇产科学 | 29篇 |
基础医学 | 297篇 |
口腔科学 | 71篇 |
临床医学 | 174篇 |
内科学 | 349篇 |
皮肤病学 | 45篇 |
神经病学 | 113篇 |
特种医学 | 160篇 |
外科学 | 216篇 |
综合类 | 63篇 |
预防医学 | 235篇 |
眼科学 | 48篇 |
药学 | 142篇 |
肿瘤学 | 100篇 |
出版年
2023年 | 9篇 |
2021年 | 19篇 |
2020年 | 10篇 |
2019年 | 17篇 |
2018年 | 22篇 |
2017年 | 8篇 |
2016年 | 26篇 |
2015年 | 19篇 |
2014年 | 36篇 |
2013年 | 58篇 |
2012年 | 78篇 |
2011年 | 78篇 |
2010年 | 73篇 |
2009年 | 56篇 |
2008年 | 88篇 |
2007年 | 102篇 |
2006年 | 95篇 |
2005年 | 82篇 |
2004年 | 79篇 |
2003年 | 74篇 |
2002年 | 52篇 |
2001年 | 56篇 |
2000年 | 40篇 |
1999年 | 64篇 |
1998年 | 58篇 |
1997年 | 40篇 |
1996年 | 44篇 |
1995年 | 40篇 |
1994年 | 27篇 |
1993年 | 48篇 |
1992年 | 34篇 |
1991年 | 41篇 |
1990年 | 48篇 |
1989年 | 35篇 |
1988年 | 44篇 |
1987年 | 31篇 |
1986年 | 38篇 |
1985年 | 37篇 |
1984年 | 28篇 |
1983年 | 29篇 |
1982年 | 20篇 |
1981年 | 17篇 |
1980年 | 25篇 |
1979年 | 20篇 |
1978年 | 15篇 |
1977年 | 10篇 |
1976年 | 16篇 |
1975年 | 12篇 |
1974年 | 17篇 |
1971年 | 8篇 |
排序方式: 共有2123条查询结果,搜索用时 78 毫秒
31.
A systematic review of acute kidney injury in pediatric allogeneic hematopoietic stem cell recipients 下载免费PDF全文
The process of allogeneic HSCT in children is associated with frequent AKI and mortality, but the epidemiology is not widely reported. The aim of this review was to summarize the available evidence on incidence, risk factors, timing, and prognosis of AKI in children following HSCT. We systematically reviewed all observational studies reporting incidence and outcomes of AKI in pediatric allogenic HSCT recipients. The minimum criteria for AKI were defined as an increase in sCr ≥ x1.5 or urine output ≤0.5 mL/kg/min over six h. Medline and Embase were searched until March 2014. From 993 electronic records, five were eligible for inclusion (n = 571 patients). The average incidence of AKI within the first 100 days following HSCT was 21.7% (range 11–42%), and the average time of onset was 4–6 wk post‐transplant. Risk factors for AKI included cyclosporine toxicity, amphotericin B and foscarnet, SOS, and having a mismatched donor. There were conflicting reports on whether AKI was associated with the development of CKD. AKI is a common and potentially life‐threatening complication following HSCT in children. Further quality observational studies are needed to accurately determine the epidemiology and prognosis of AKI in this population. 相似文献
32.
33.
Michelle Chin I Lo Simon Brinkworth Christina Knights Ian Mackie 《Journal of visual communication in medicine》2015,38(3-4):241-243
Medical photographs are used in many clinical settings; however, there are significant risks associated with using the camera feature on mobile devices, namely, breaches of security. PicSafe Medi is an app that allows healthcare professionals to take clinical photographs using smart devices whilst addressing the concerns of patient confidentiality. We review the app to assess its functionality in a UK clinical setting, taking into account UK guidelines such as those offered by the General Medical Council, UK legislation, the Institute of Medical Illustrators and the Department of Health. 相似文献
34.
Philip Moons Koen Luyckx Corina Thomet Werner Budts Junko Enomoto Maayke A. Sluman Chun-Wei Lu Jamie L. Jackson Paul Khairy Stephen C. Cook Shanthi Chidambarathanu Luis Alday Katrine Eriksen Mikael Dellborg Malin Berghammer Bengt Johansson Andrew S. Mackie Samuel Menahem Adrienne H. Kovacs 《The Canadian journal of cardiology》2021,37(2):215-223
BackgroundWe compared physical functioning, mental health, and quality of life (QoL) of patients with different subtypes of congenital heart disease (CHD) in a large international sample and investigated the role of functional class in explaining the variance in outcomes across heart defects.MethodsIn the cross-sectional Assessment of Patterns of Patient-Reported Outcome in Adults with Congenital Heart Disease-International Study (APPROACH-IS), we enrolled 4028 adult patients with CHD from 15 countries. Diagnostic groups with at least 50 patients were included in these analyses, yielding a sample of 3538 patients (median age: 32 years; 52% women). Physical functioning, mental health, and QoL were measured with the SF-12 health status survey, Hospital Anxiety and Depression Scale (HADS), linear analog scale (LAS) and Satisfaction with Life Scale, respectively. Functional class was assessed using the patient-reported New York Heart Association (NYHA) class. Multivariable general linear mixed models were applied to assess the relationship between the type of CHD and patient-reported outcomes, adjusted for patient characteristics, and with country as random effect.ResultsPatients with coarctation of the aorta and those with isolated aortic valve disease reported the best physical functioning, mental health, and QoL. Patients with cyanotic heart disease or Eisenmenger syndrome had worst outcomes. The differences were statistically significant, above and beyond other patient characteristics. However, the explained variances were small (0.6% to 4.1%) and decreased further when functional status was added to the models (0.4% to 0.9%).ConclusionsSome types of CHD predict worse patient-reported outcomes. However, it appears that it is the functional status associated with the heart defect rather than the heart defect itself that shapes the outcomes. 相似文献
35.
Lotfi M Mackie K Dzavik V Seidelin PH 《Journal of the American College of Cardiology》2004,43(3):337-342
OBJECTIVES: This study was designed to determine the likelihood of harm in patients having additional delays before urgent coronary artery bypass graft (UCABG) surgery after percutaneous coronary intervention (PCI). BACKGROUND: Patients who have PCI at hospitals without cardiac surgery have additional delays to surgery when UCABG is indicated. METHODS: Detailed chart review was performed on all patients who had a failed PCI leading to UCABG at a large tertiary care hospital. A prespecified set of criteria (hemodynamic instability, coronary perforation with significant effusion or tamponade, or severe ischemia) was used to identify patients who would have an increased likelihood of harm with additional delays to surgery. RESULTS: From 1996 to 2000, 6,582 PCIs were performed. There were 45 patients (0.7%) identified to have UCABG. The demographic characteristics of the UCABG patients were similar to the rest of the patients in the PCI database, except for significantly more type C lesions (45.3% vs. 25.0%, p < 0.001) and more urgent cases (66.6% vs. 49.8%, p = 0.03) in patients with UCABG. Myocardial infarction occurred in eight patients (17.0%) after UCABG, with a mean peak creatine kinase of 2,445 +/- 1,212 IU/l. Death during the index hospital admission occurred in two patients. Eleven of the 45 patients (24.4%) were identified by the prespecified criteria to be at high likelihood of harm with additional delays to surgery. The absolute risk of harm is approximately one to two patients per 1,000 PCIs. CONCLUSIONS: Approximately one in four patients referred for UCABG would be placed at increased risk of harm if delays to surgery were encountered. 相似文献
36.
37.
38.
39.
Careful history-taking and examination are important in diagnosing self-inflicted injuries, which are often very difficult to diagnose and manage. We describe a case of a misdiagnosed traumatic ulcer in a 9-year-old boy which meant that he went through months of pain and discomfort, missed school, was admitted to hospital and had a series of unnecessary investigations. Clinical Relevance: This case highlights the importance of dental referral, careful history and examination in managing unusual oral ulceration. 相似文献