全文获取类型
收费全文 | 3568篇 |
免费 | 182篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 99篇 |
儿科学 | 100篇 |
妇产科学 | 72篇 |
基础医学 | 311篇 |
口腔科学 | 151篇 |
临床医学 | 388篇 |
内科学 | 802篇 |
皮肤病学 | 68篇 |
神经病学 | 234篇 |
特种医学 | 289篇 |
外科学 | 608篇 |
综合类 | 27篇 |
一般理论 | 2篇 |
预防医学 | 173篇 |
眼科学 | 38篇 |
药学 | 198篇 |
中国医学 | 13篇 |
肿瘤学 | 201篇 |
出版年
2023年 | 11篇 |
2022年 | 39篇 |
2021年 | 70篇 |
2020年 | 54篇 |
2019年 | 74篇 |
2018年 | 68篇 |
2017年 | 61篇 |
2016年 | 73篇 |
2015年 | 76篇 |
2014年 | 120篇 |
2013年 | 166篇 |
2012年 | 217篇 |
2011年 | 224篇 |
2010年 | 149篇 |
2009年 | 123篇 |
2008年 | 207篇 |
2007年 | 163篇 |
2006年 | 203篇 |
2005年 | 169篇 |
2004年 | 168篇 |
2003年 | 144篇 |
2002年 | 129篇 |
2001年 | 87篇 |
2000年 | 63篇 |
1999年 | 56篇 |
1998年 | 66篇 |
1997年 | 75篇 |
1996年 | 62篇 |
1995年 | 50篇 |
1994年 | 34篇 |
1993年 | 37篇 |
1992年 | 35篇 |
1991年 | 45篇 |
1990年 | 32篇 |
1989年 | 41篇 |
1988年 | 50篇 |
1987年 | 39篇 |
1986年 | 41篇 |
1985年 | 30篇 |
1984年 | 19篇 |
1983年 | 19篇 |
1982年 | 25篇 |
1981年 | 22篇 |
1980年 | 10篇 |
1979年 | 17篇 |
1978年 | 17篇 |
1977年 | 12篇 |
1975年 | 20篇 |
1973年 | 12篇 |
1972年 | 10篇 |
排序方式: 共有3774条查询结果,搜索用时 62 毫秒
1.
Gian Eugenio Tontini Guido Manfredi Stefania Orlando Helmut Neumann Maurizio Vecchi Elisabetta Buscarini Luca Elli 《Digestive endoscopy》2019,31(6):627-643
Over the last decade, impressive technological advances have occurred in ultrasonography and small‐bowel endoscopy. Nowadays, endoscopic ultrasonography is an essential diagnostic tool and a therapeutic weapon for pancreatobiliary disorders. Capsule endoscopy and device‐assisted enteroscopy have quickly become the reference standard for the diagnosis of small‐bowel luminal diseases, thereby leading to radical changes in diagnostic and therapeutic pathways. We herein provide an up‐to‐date overview of the latest advances in endoscopic ultrasonography and small‐bowel endoscopy, focusing on the emerging paradigms and technological innovations that might improve clinical practice in the near future. 相似文献
2.
Lesley A. Inker Morgan E. Grams Andrew S. Levey Josef Coresh Massimo Cirillo John F. Collins Ron T. Gansevoort Orlando M. Gutierrez Takayuki Hamano Gunnar H. Heine Shizukiyo Ishikawa Sun Ha Jee Florian Kronenberg Martin J. Landray Katsuyuki Miura Girish N. Nadkarni Carmen A. Peralta Dietrich Rothenbacher Mark Woodward 《American journal of kidney diseases》2019,73(2):206-217
3.
Anton A. Semenistyy Elena A. Litvina EA Anna G. Fedotova Chukwuweike Gwam Andrey N. Mironov 《Injury》2019,50(2):515-520
Background
Intramedullary nailing is considered a “gold standard” for treatment of tibial shaft fractures. However, some types of fractures are typically considered as “difficult for nailing”. This group includes the periarticular fractures, fractures of both bones at the same level, comminuted and segmental fractures of the tibia. Fixator-assisted nailing (FAN) is an effective method treatment of these types of fractures. The main requirements for the ideal reduction device are an ease of its installation and an ability of multiplanar fracture reduction. Fixator-assisted nailing (FAN) with the use of two perpendicular to each other monolateral tubular frames perfectly meets these requirements. In this study we present this new surgical technique and the analysis of first 30 cases.Methods
A prospective analysis was conducted for 30 patients with “difficult for nailing” tibial fractures treated with fixator-assisted nailing in our institution between September 1st, 2017, and March 1st, 2018. The duration of surgery and its different stages, the time of fluoroscopy, difficulties encountered during surgery, were analyzed. Clinical and radiological methods were used to evaluated reduction quality.Results
In all 30 cases the acceptable reduction was achieved. The mean duration of the surgical procedure was 73.7?±?3?min. The mean duration of fluoroscopy 85.9?±?4.8?s. In 7 cases we faced with technical difficulties, which were successfully addressed.Conclusion
The described technique of FAN is an effective method for the treatment of “difficult for nailing” tibial fractures. Future multi-centered studies with a larger number of patients are needed to validate our results. 相似文献4.
5.
Federigo Sicuteri Maria Nicolodi Bruno Marcello Fusco Salvatore Orlando 《Headache》1991,31(9):577-581
Following tooth pulp extirpation, some subjects suffer from persistent pain which affects edentate sites in absence of any local pathology. As regards this peculiar pain, called phantom tooth pain (PTP), what is puzzling is the fact there is a low prevalence of PTP in a very large population showing identical conditions of tooth pulp extirpation. The present investigation indicates that PTP mainly affects migraine (M) and cluster headache (CH) sufferers, whereas it does not affect subjects who have a negative personal and family history for idiopathic headache (IH). These results circumscribe the presence of PTP to a specific section of the population. The present results, besides indicating that PTP may be the result of a peculiar neuronal predisposition relating to IH pathogenesis, suggests some practical therapeutic hints. In fact, successful anti- M and anti-CH prophylactic treatment greatly improve PTP syndrome. 相似文献
6.
7.
Continuous mixed venous oximetry in critically ill surgical patients. 'High-tech' cost-effectiveness 总被引:2,自引:0,他引:2
R Orlando 《Archives of surgery (Chicago, Ill. : 1960)》1986,121(4):470-471
Mixed venous oxygen saturation (Svo2) provides a measure of cardiorespiratory ability to meet the body's needs for oxygen. The Svo2 was measured continuously in 20 critically ill surgical patients using a pulmonary-artery oximetry system. The accuracy of the technique was validated by comparing initial continuous Svo2 to the laboratory determination of Svo2. Oximetry was used to guide therapeutic decisions regarding fluid, inotropic agents, vasodilators and ventilator setting and was useful in ten cases. Sepsis developed in nine patients; this severely limited the usefulness of the technique. With clinical decision making based on oximetry, there was a savings per catheter of 2.65 cardiac output determinations and 5.9 venous blood gas determinations, resulting in a net savings per catheter of +75. 相似文献
8.
9.
10.
G Olivero A Franchello E Visetti E Orlando F Enrichens A Foco F Ibba 《Minerva chirurgica》1990,45(1-2):11-17
Seventeen cases of segmental portal hypertension due to splenic vein thrombosis are reported. This syndrome may be asymptomatic for a long time and then present suddenly in the form of a serious picture of high digestive haemorrhage due to rupture of gastric fundus varices as a result of hypertrophied submucous collateral drainage circulation. Useful for diagnosis are oesophagogastroduodenoscopy, which points to stomach varices, and splenoportography or splenic artery angiography with venous phase, which highlight pathognomonic dilatation and tortuosity of the gastroepiploic veins. Surgical exploration typically shows: presence of large epiploic vessels, splenomegaly, absence of changes in the liver and in the portal and mesenteric circulation. Curative treatment of choice is splenectomy. 相似文献