全文获取类型
收费全文 | 2565950篇 |
免费 | 180304篇 |
国内免费 | 3459篇 |
专业分类
耳鼻咽喉 | 33629篇 |
儿科学 | 83722篇 |
妇产科学 | 66804篇 |
基础医学 | 372880篇 |
口腔科学 | 66951篇 |
临床医学 | 227848篇 |
内科学 | 496751篇 |
皮肤病学 | 53467篇 |
神经病学 | 206257篇 |
特种医学 | 98486篇 |
外国民族医学 | 497篇 |
外科学 | 387211篇 |
综合类 | 50052篇 |
现状与发展 | 12篇 |
一般理论 | 915篇 |
预防医学 | 206071篇 |
眼科学 | 57981篇 |
药学 | 187448篇 |
11篇 | |
中国医学 | 5352篇 |
肿瘤学 | 147368篇 |
出版年
2021年 | 20188篇 |
2019年 | 20718篇 |
2018年 | 47424篇 |
2017年 | 36558篇 |
2016年 | 40868篇 |
2015年 | 27914篇 |
2014年 | 38876篇 |
2013年 | 57255篇 |
2012年 | 84870篇 |
2011年 | 101765篇 |
2010年 | 65297篇 |
2009年 | 56910篇 |
2008年 | 94947篇 |
2007年 | 101950篇 |
2006年 | 84415篇 |
2005年 | 83048篇 |
2004年 | 80287篇 |
2003年 | 78176篇 |
2002年 | 74062篇 |
2001年 | 110853篇 |
2000年 | 113747篇 |
1999年 | 95391篇 |
1998年 | 28023篇 |
1997年 | 24531篇 |
1996年 | 24781篇 |
1995年 | 23372篇 |
1994年 | 21529篇 |
1993年 | 20245篇 |
1992年 | 73240篇 |
1991年 | 71318篇 |
1990年 | 69604篇 |
1989年 | 66752篇 |
1988年 | 61337篇 |
1987年 | 60029篇 |
1986年 | 56075篇 |
1985年 | 53827篇 |
1984年 | 39917篇 |
1983年 | 33940篇 |
1982年 | 20160篇 |
1979年 | 36350篇 |
1978年 | 25955篇 |
1977年 | 21485篇 |
1976年 | 20537篇 |
1975年 | 22033篇 |
1974年 | 26419篇 |
1973年 | 25058篇 |
1972年 | 23448篇 |
1971年 | 22258篇 |
1970年 | 20453篇 |
1969年 | 19491篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
281.
Walid K. Abu Saleh Phillip Mason Odeaa Al Jabbari Hany Samir Brian A. Bruckner 《Texas Heart Institute journal / from the Texas Heart Institute of St. Luke's Episcopal Hospital, Texas Children's Hospital》2015,42(6):569-571
The Impella 5.0, a percutaneously inserted left ventricular assist device, has been used to support patients who have severe heart failure or who are undergoing high-risk percutaneous coronary intervention. We report our surgical placement of the Impella 5.0, through a graft sewn to the aorta, to unload the left ventricle of a 59-year-old man who was undergoing venoarterial extracorporeal membrane oxygenation for postcardiotomy shock. The patient underwent successful placement of a long-term left ventricular assist device before his discharge from the hospital. The versatility of the Impella 5.0 is exemplified in this patient who was successfully bridged to long-term support. 相似文献
282.
A. Hochsprung S. Escudero-Uribe A.J. Ibáñez-Vera G. Izquierdo-Ayuso 《Neurología (Barcelona, Spain)》2021,36(6):433-439
IntroductionPain is highly prevalent in patients with multiple sclerosis (MS); it is chronic in 50% of cases and is classified as nociceptive, neuropathic, or mixed-type. Pain affects quality of life, sleep, and the activities of daily living. Electrotherapy is an interesting alternative or complementary treatment in the management of pain in MS, with new innovations constantly appearing.Material and methodsThis study evaluates the effectiveness of treatment with monopolar dielectric transmission of pulsed electromagnetic fields (PEMF) for pain associated with MS. We performed a randomised, placebo-controlled clinical trial including 24 patients, who were assessed with the Brief Pain Inventory, the Multiple Sclerosis International Quality of Life questionnaire, the Beck Depression Inventory, and the Modified Fatigue Impact Scale.ResultsStatistically significant improvements were observed in maximum and mean pain scores, as well as in the impact of pain on work, personal relationships, and sleep and rest. Not significant differences were found between the treatment and placebo groups.ConclusionsTreatment with PEMF may be effective in reducing pain in patients with MS, although further research is necessary to confirm its effectiveness over placebo and to differentiate which type of pain may be more susceptible to this treatment. 相似文献
283.
Anna Grace Tribble Phillip Summers Haiying Chen Sara A. Quandt 《Archives of environmental & occupational health》2016,71(6):309-316
The jobs of Latino manual laborers place their mental and physical health at risk. This study evaluates the associations among musculoskeletal pain, mental health, and work organization in Latino manual laborers. Farmworkers and nonfarmworkers (n = 189) in North Carolina were interviewed for self-reported musculoskeletal pain, depressive symptoms, stress, work safety climate, and precarious job status. More nonfarmworkers than farmworkers had neck and shoulder pain, but they did not differ in other areas of musculoskeletal pain. Depressive symptoms had a significant association with neck and shoulder pain (p < .05). Precariousness had a significant association with back pain (p < .05). Farmworker participants had H-2A visas and were afforded some protection compared to nonfarmworker manual workers. Research is needed to improve policy that relieves pain and improves mental health for all Latino manual workers. 相似文献
284.
285.
286.
Clinical Spectrum of Capillary Malformation–Arteriovenous Malformation Syndrome Presenting to a Pediatric Dermatology Practice: A Retrospective Study
下载免费PDF全文
![点击此处可从《Pediatric dermatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Nicole A. Weitz M.D. Christine T. Lauren M.D. Gerald G. Behr M.D. June K. Wu M.D. Jessica J. Kandel M.D. Philip M. Meyers M.D. Sally Sultan M.D. Kwame Anyane‐Yeboa M.D. Kimberly D. Morel M.D. Maria C. Garzon M.D. 《Pediatric dermatology》2015,32(1):76-84
Capillary malformation–arteriovenous malformation syndrome (CM‐AVM) is an autosomal dominant disorder caused by RASA1 mutations. The prevalence and phenotypic spectrum are unknown. Evaluation of patients with multiple CMs is challenging because associated AVMs can be life threatening. The objective of this study was to describe the clinical characteristics of children presenting with features of CM‐AVM to an academic pediatric dermatology practice. After institutional review board approval was received, a retrospective chart review was performed of patients presenting between 2009 and 2012 with features of CM‐AVM. We report nine cases. Presenting symptoms ranged from extensive vascular stains and cardiac failure to CMs noted incidentally during routine skin examination. All demonstrated multiple CMs, two had Parkes Weber syndrome, and two had multiple infantile hemangiomas. Seven patients had family histories of multiple CMs; three had family histories of large, atypical CMs. Six had personal or family histories of AVMs. Genetic evaluation was recommended for all and was pursued by six families; four RASA1 mutations were identified, including one de novo. Consultations with neurology, cardiology, and orthopedics were recommended. Most patients (89%) have not required treatment to date. CM‐AVM is an underrecognized condition with a wide clinical spectrum that often presents in childhood. Further evaluation may be indicated in patients with multiple CMs. This study is limited by its small and retrospective nature. 相似文献
287.
288.
289.
290.