全文获取类型
收费全文 | 1235篇 |
免费 | 147篇 |
国内免费 | 49篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 99篇 |
妇产科学 | 18篇 |
基础医学 | 125篇 |
口腔科学 | 46篇 |
临床医学 | 124篇 |
内科学 | 345篇 |
皮肤病学 | 45篇 |
神经病学 | 24篇 |
特种医学 | 191篇 |
外科学 | 68篇 |
综合类 | 103篇 |
预防医学 | 79篇 |
眼科学 | 9篇 |
药学 | 76篇 |
中国医学 | 4篇 |
肿瘤学 | 66篇 |
出版年
2024年 | 3篇 |
2023年 | 17篇 |
2022年 | 13篇 |
2021年 | 28篇 |
2020年 | 25篇 |
2019年 | 12篇 |
2018年 | 25篇 |
2017年 | 47篇 |
2016年 | 41篇 |
2015年 | 31篇 |
2014年 | 67篇 |
2013年 | 72篇 |
2012年 | 29篇 |
2011年 | 31篇 |
2010年 | 69篇 |
2009年 | 71篇 |
2008年 | 32篇 |
2007年 | 73篇 |
2006年 | 38篇 |
2005年 | 28篇 |
2004年 | 22篇 |
2003年 | 23篇 |
2002年 | 16篇 |
2001年 | 28篇 |
2000年 | 15篇 |
1999年 | 19篇 |
1998年 | 77篇 |
1997年 | 64篇 |
1996年 | 60篇 |
1995年 | 50篇 |
1994年 | 46篇 |
1993年 | 43篇 |
1992年 | 10篇 |
1991年 | 5篇 |
1990年 | 16篇 |
1989年 | 22篇 |
1988年 | 24篇 |
1987年 | 13篇 |
1986年 | 20篇 |
1985年 | 17篇 |
1984年 | 12篇 |
1983年 | 13篇 |
1982年 | 10篇 |
1981年 | 8篇 |
1980年 | 8篇 |
1979年 | 5篇 |
1978年 | 6篇 |
1977年 | 5篇 |
1976年 | 12篇 |
1975年 | 9篇 |
排序方式: 共有1431条查询结果,搜索用时 3 毫秒
1.
Waseem Raza Hafiza Anum Mohy-u-Din Sajid Shaeen Malik Iqra Manzoor Baby Nadeem 《Ultrasound in medicine & biology》2019,45(1):21-25
The objective of the study was to evaluate the reliability of sonoelastography in ductal carcinoma in patients in primary and secondary health care settings. Google Scholar, PubMed, Medline, Medscape, Wikipedia and NCBI were searched in January 2018 for all original research and review articles to identify relevant studies. Two reviewers selected the articles independently for based on the title and abstract. The selection criteria were sonoelastography accuracy for diagnosing ductal carcinoma as index text, B-mode sonography, and micropure imaging; surgery and histologic findings were used as reference text; and benign and malignant breast abnormalities and ductal carcinoma were used as target conditions. Two reviewers extracted the data on selected study characteristics, and the results were used to construct the tables and figures. Fifteen studies on ductal carcinoma were found. The overall sensitivity of sonoelastography in diagnosing ductal carcinoma was 85.7%, and the specificity, 79.8%. On the basis of the literature review, it was concluded that sonoelastography has high sensitivity and specificity in diagnosing ductal carcinoma. 相似文献
2.
By injecting small amounts of CO2 through a needle, one can move bowel or bladder from the intended path of instruments during interventional procedures. The technique worked well in six of seven cases in the pelvis and retroperitoneum; it was not effective in the mediastinum or midabdomen (n = 6). 相似文献
3.
外科医生和手术室人员经常接触手术设备产生的烟气,病人也会暴露于烟气中,特别是腹腔镜手术中产生的烟气滞留于腹腔内这一密闭空间并被吸收.这些烟气是一种与香烟烟气相似的毒性物质,然而对这种毒性物质的影响还未引起足够重视.应该采取必要措施尽可能减少手术中烟气的不良影响. 相似文献
4.
5.
6.
7.
8.
9.
Calciphylaxis – a topical overview 总被引:3,自引:0,他引:3
G Arseculeratne† AT Evans‡ SM Morley† 《Journal of the European Academy of Dermatology and Venereology》2006,20(5):493-502
'Calciphylaxis', a calcification syndrome associated with ischaemic cutaneous necrosis, is acquired naturally in humans in disease states. It is a life and limb-threatening complication, usually observed in patients with renal disease and secondary hyperparathyroidism, but known to occur in the absence of renal or parathyroid disease. The reported mortality rate, which ranges from 60-80%, relates to wound infection, sepsis and organ failure. It is a small-vessel vasculopathy, which is estimated to occur in about 4% of haemodialysis patients. Clinically, violaceous, reticulate areas of cutaneous necrosis and eschar may be evident, particularly in the extremities. In addition to the clinical picture, a raised calcium phosphorous product, an elevated parathyroid hormone level, radiographic evidence of vessel and soft-tissue calcification and the finding of mural calcification affecting small arteries and arterioles on histopathology help to confirm the diagnosis of this entity which generally has a poor prognosis. A high index of suspicion and an active multidisciplinary management approach, with rigorous attention to wound care and prevention of sepsis, are vital in the management of these patients. In this overview, we discuss the pathophysiology, clinical features and associations, risk factors, diagnosis and management issues relating to calciphylaxis. 相似文献
10.
Bastiaan R Klarenbeek Alexander AFA Veenhof Elly SM de Lange Willem A Bemelman Roberto Bergamaschi Piet Heres Antonio M Lacy Wim T van den Broek Donald L van der Peet Miguel A Cuesta 《BMC surgery》2007,7(1):16