全文获取类型
收费全文 | 218952篇 |
免费 | 37051篇 |
国内免费 | 6795篇 |
专业分类
耳鼻咽喉 | 5755篇 |
儿科学 | 6201篇 |
妇产科学 | 3103篇 |
基础医学 | 8946篇 |
口腔科学 | 2833篇 |
临床医学 | 35981篇 |
内科学 | 55163篇 |
皮肤病学 | 8370篇 |
神经病学 | 16990篇 |
特种医学 | 8427篇 |
外国民族医学 | 22篇 |
外科学 | 46520篇 |
综合类 | 15857篇 |
现状与发展 | 92篇 |
一般理论 | 2篇 |
预防医学 | 13579篇 |
眼科学 | 4666篇 |
药学 | 9029篇 |
88篇 | |
中国医学 | 5052篇 |
肿瘤学 | 16122篇 |
出版年
2024年 | 890篇 |
2023年 | 5413篇 |
2022年 | 3009篇 |
2021年 | 5380篇 |
2020年 | 7968篇 |
2019年 | 3758篇 |
2018年 | 8965篇 |
2017年 | 9206篇 |
2016年 | 9969篇 |
2015年 | 11107篇 |
2014年 | 18948篇 |
2013年 | 19297篇 |
2012年 | 11143篇 |
2011年 | 11537篇 |
2010年 | 15300篇 |
2009年 | 18714篇 |
2008年 | 10623篇 |
2007年 | 8883篇 |
2006年 | 11112篇 |
2005年 | 7753篇 |
2004年 | 5914篇 |
2003年 | 4656篇 |
2002年 | 4211篇 |
2001年 | 5455篇 |
2000年 | 4344篇 |
1999年 | 4240篇 |
1998年 | 4277篇 |
1997年 | 4084篇 |
1996年 | 3796篇 |
1995年 | 3575篇 |
1994年 | 2299篇 |
1993年 | 1761篇 |
1992年 | 1599篇 |
1991年 | 1564篇 |
1990年 | 1217篇 |
1989年 | 1262篇 |
1988年 | 1116篇 |
1987年 | 948篇 |
1986年 | 954篇 |
1985年 | 768篇 |
1984年 | 569篇 |
1983年 | 540篇 |
1982年 | 528篇 |
1981年 | 422篇 |
1980年 | 372篇 |
1979年 | 329篇 |
1978年 | 334篇 |
1977年 | 403篇 |
1975年 | 279篇 |
1972年 | 310篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Takashi Ito Ryuji Sakakibara MD Tatsuya Yamamoto Tomoyuki Uchiyama Zhi Liu Masato Asahina Morihiro Higashi Kimihito Arai Shoichi Ito Yusuke Awa Kaori Yamamoto Mika Kinou Tomonori Yamanishi Takamichi Hattori 《Clinical autonomic research》2006,16(1):66-71
Abstract Uro-neurological assessment was performed in four patients with small-fiber neuropathy due to amyloidosis (2 transthyretin-type/2
immunoglobulin light-chain-type). Voiding difficulties were due to detrusor weakness and impaired bladder sensation. In two
patients cholinesterase inhibition treatment caused urge incontinence, indicating detrusor denervation supersensitivity. The
underlying mechanisms of urinary dysfunction seem to involve postganglionic cholinergic and afferent somatic nerves. 相似文献
992.
免费医学信息检索在医学编辑中的作用 总被引:1,自引:0,他引:1
介绍免费医学信息检索途径,探讨免费医学信息检索在关键词、中图分类号、参考文献等编辑加工中的作用,提出医学编辑应掌握医学信息检索技能,熟悉常用免费医学数据库的检索,利用医学信息检索提高工作效率及编校质量。 相似文献
993.
994.
Comparison of Asymmetry in Cerebral Blood Flow Between Brain Hemispheres Using Digital Subtraction Angiography 总被引:2,自引:0,他引:2
Afshin A. Divani PhD Adnan I. Qureshi MD Kenneth R. Hoffman PhD M. Fareed K. Suri MD Jawad F. Kirmani MD 《Journal of neuroimaging》2006,16(2):139-145
BACKGROUND AND PURPOSE: Recently, endovascular techniques have gained significant therapeutic potential for both treatment and prevention of stroke. Cerebral angiography, which is an essential component of these procedures, has been used to provide morphological information regarding condition of blood vessels. In this study, we propose to determine the possibility of acquiring information regarding cerebral blood flow (CBF) in addition to morphologic information from data routinely available during angiography. METHODS: Digital subtraction angiography sequences were obtained for eight patients having occlusive disease in internal carotid artery (ICA) territories. Two regions-of-interest (ROIs) corresponding to the two brain hemispheres on AP view were delineated. For each image, the average pixel value within each ROI was calculated and used to generate time-density curves. Indices obtained from each curve were compared with each other and with the results obtained from the single photon emission computed tomography (SPECT) studies performed a pre- or postangiography procedure. RESULTS: Comparison between ICA stenosis and cerebral perfusion measurements revealed that cerebral perfusion deficit can be independent of arterial occlusive disease. The indices obtained from the time-density curves exhibit a correlating trend with the results from SPECT studies. However, lack of sufficient sample data prevented any meaningful statistical analysis to be conducted. CONCLUSIONS: We have developed a technique for utilizing the angiographic data for the important task of routinely and easily measuring CBF. Availability of CBF measurements during cerebral angiography may favorably impact upon the appropriate use of endovascular procedures and potentially contribute to the reduction of morbidity and mortality associated with stroke. 相似文献
995.
996.
997.
998.
999.
1000.