全文获取类型
收费全文 | 12476篇 |
免费 | 652篇 |
国内免费 | 63篇 |
专业分类
耳鼻咽喉 | 99篇 |
儿科学 | 254篇 |
妇产科学 | 189篇 |
基础医学 | 1837篇 |
口腔科学 | 246篇 |
临床医学 | 863篇 |
内科学 | 3226篇 |
皮肤病学 | 208篇 |
神经病学 | 1045篇 |
特种医学 | 625篇 |
外科学 | 1498篇 |
综合类 | 47篇 |
一般理论 | 1篇 |
预防医学 | 385篇 |
眼科学 | 262篇 |
药学 | 1101篇 |
中国医学 | 58篇 |
肿瘤学 | 1247篇 |
出版年
2023年 | 59篇 |
2022年 | 84篇 |
2021年 | 184篇 |
2020年 | 78篇 |
2019年 | 124篇 |
2018年 | 159篇 |
2017年 | 122篇 |
2016年 | 191篇 |
2015年 | 203篇 |
2014年 | 223篇 |
2013年 | 290篇 |
2012年 | 513篇 |
2011年 | 575篇 |
2010年 | 342篇 |
2009年 | 293篇 |
2008年 | 555篇 |
2007年 | 658篇 |
2006年 | 608篇 |
2005年 | 655篇 |
2004年 | 671篇 |
2003年 | 650篇 |
2002年 | 722篇 |
2001年 | 498篇 |
2000年 | 503篇 |
1999年 | 441篇 |
1998年 | 194篇 |
1997年 | 137篇 |
1996年 | 148篇 |
1995年 | 129篇 |
1994年 | 109篇 |
1993年 | 90篇 |
1992年 | 382篇 |
1991年 | 307篇 |
1990年 | 277篇 |
1989年 | 334篇 |
1988年 | 255篇 |
1987年 | 283篇 |
1986年 | 219篇 |
1985年 | 181篇 |
1984年 | 150篇 |
1983年 | 96篇 |
1982年 | 66篇 |
1981年 | 57篇 |
1980年 | 45篇 |
1979年 | 97篇 |
1978年 | 52篇 |
1977年 | 49篇 |
1976年 | 33篇 |
1975年 | 17篇 |
1966年 | 12篇 |
排序方式: 共有10000条查询结果,搜索用时 546 毫秒
1.
Hori Hiroki Ohta Asuka Matsui Honami Yano Kanako Morita-Tominaka Miyuki Linn Zayar Masumoto Daisuke Okumura Yosuke Okamura Satoshi Kurihara Kosuke Hayakawa Akira Rikiishi Takeshi Kobayashi Kyoko 《International journal of clinical oncology / Japan Society of Clinical Oncology》2022,27(1):245-252
International Journal of Clinical Oncology - The practice of cancer diagnosis disclosure to children has been changed with the times. The regulations of clinical trials in the 2000s might change... 相似文献
2.
3.
4.
5.
Rahul S. Loungani Marat Fudim Dave Ranney Ajar Kochar Marc D. Samsky Desiree Bonadonna Akinobu Itoh Hiroo Takayama Koji Takeda Daniel Wojdyla Adam D. DeVore Mani Daneshmand 《Journal of cardiac failure》2021,27(3):327-337
BackgroundVenoarterial extracorporeal membrane oxygenation (VA-ECMO) is increasingly used as a life-saving therapy for patients with cardiovascular collapse, but identifying patients unlikely to benefit remains a challenge.Methods and ResultsWe created the RESCUE registry, a retrospective, observational registry of adult patients treated with VA-ECMO between January 2007 and June 2017 at 3 high-volume centers (Columbia University, Duke University, and Washington University) to describe short-term patient outcomes. In 723 patients treated with VA-ECMO, the most common indications for deployment were postcardiotomy shock (31%), cardiomyopathy (including acute heart failure) (26%), and myocardial infarction (17%). Patients frequently suffered in-hospital complications, including acute renal dysfunction (45%), major bleeding (41%), and infection (33%). Only 40% of patients (n = 290) survived to discharge, with a minority receiving durable cardiac support (left ventricular assist device [n = 48] or heart transplantation [n = 7]). Multivariable regression analysis identified risk factors for mortality on ECMO as older age (odds ratio [OR], 1.26; 95% confidence interval [CI], 1.12–1.42) and female sex (OR, 1.44; 95% CI, 1.02–2.02) and risk factors for mortality after decannulation as higher body mass index (OR 1.17; 95% CI, 1.01-1.35) and major bleeding while on ECMO support (OR, 1.92; 95% CI, 1.23–2.99).ConclusionsDespite contemporary care at high-volume centers, patients treated with VA-ECMO continue to have significant in-hospital morbidity and mortality. The optimization of outcomes will require refinements in patient selection and improvement of care delivery. 相似文献
6.
Hiroto Kinoshita Hitomi Nishioka Aya Ikeda Kyoko Ikoma Yoichi Sameshima Hidehisa Ohi Mizuki Tatsuno Junka Kouyama Chiaki Kawamoto Tomohiro Mitsui Yuko Tamura Yu Hashimoto Masashi Nishio Tsuyoshi Ogashiwa Yusuke Saigusa Shin Maeda Hideaki Kimura Reiko Kunisaki Kazuhiko Koike 《Journal of gastroenterology and hepatology》2019,34(11):1929-1939
7.
8.
Mitsuru Takahashi Hidenobu Takahashi Tetsushi Itoh Masaharu Nomura Akihiko Ogata Sachio Maehara Harubumi Kato 《Annals of thoracic and cardiovascular surgery》2006,12(1):50-52
Postoperative empyema and aspergillosis were diagnosed in a 66-year-old man. Since non-operative therapy was not effective, we performed surgery. On the 8th postoperative day, a covered Ultraflex expandable stent (Boston Scientific, Galway, Ireland) was implanted to make a one-way airway for blocking a major air leak from a bronchopleural fistula causing respiratory distress. His general condition improved gradually, and he was discharged 30 days after stenting. In conclusion, we used a covered Ultraflex expandable stent to make an airway to block an air leak. This may be a new application for this stent. 相似文献
9.
10.
K Murata H Itoh G Todo T Itoh M Kanaoka M Furuta K Torizuka 《Investigative radiology》1986,21(1):24-30
This study was undertaken to clarify the microvascular anatomy of the normal human bronchial circulation, focusing on the bronchial venous system and its communication with the pulmonary circulation. Ten normal lungs obtained at autopsy were studied. Bronchial arteriography was performed in six lungs, pulmonary arteriography in two lungs, and pulmonary venography in another two. Using radiologic methods, including microradiography, and serial histologic sections, we found numerous bronchial venous plexuses around the airways and blood vessels into which the bronchial capillaries drained. Frequent communications of the venous plexuses with the pulmonary veins and neighboring alveolar capillaries were also demonstrated. The bronchial venous plexus and its close connection with the pulmonary circulation may be important in various pathologic conditions involving the interstitial space, such as interstitial pulmonary edema. 相似文献