全文获取类型
| 收费全文 | 10948篇 |
| 免费 | 1070篇 |
| 国内免费 | 15篇 |
专业分类
| 耳鼻咽喉 | 153篇 |
| 儿科学 | 344篇 |
| 妇产科学 | 267篇 |
| 基础医学 | 1321篇 |
| 口腔科学 | 230篇 |
| 临床医学 | 1064篇 |
| 内科学 | 2203篇 |
| 皮肤病学 | 230篇 |
| 神经病学 | 966篇 |
| 特种医学 | 442篇 |
| 外科学 | 1549篇 |
| 综合类 | 443篇 |
| 一般理论 | 9篇 |
| 预防医学 | 1052篇 |
| 眼科学 | 281篇 |
| 药学 | 751篇 |
| 1篇 | |
| 中国医学 | 3篇 |
| 肿瘤学 | 724篇 |
出版年
| 2022年 | 131篇 |
| 2021年 | 286篇 |
| 2020年 | 119篇 |
| 2019年 | 212篇 |
| 2018年 | 224篇 |
| 2017年 | 164篇 |
| 2016年 | 203篇 |
| 2015年 | 204篇 |
| 2014年 | 298篇 |
| 2013年 | 427篇 |
| 2012年 | 518篇 |
| 2011年 | 462篇 |
| 2010年 | 335篇 |
| 2009年 | 311篇 |
| 2008年 | 415篇 |
| 2007年 | 434篇 |
| 2006年 | 426篇 |
| 2005年 | 463篇 |
| 2004年 | 412篇 |
| 2003年 | 397篇 |
| 2002年 | 355篇 |
| 2001年 | 277篇 |
| 2000年 | 323篇 |
| 1999年 | 297篇 |
| 1998年 | 136篇 |
| 1997年 | 118篇 |
| 1996年 | 101篇 |
| 1995年 | 100篇 |
| 1994年 | 99篇 |
| 1993年 | 93篇 |
| 1992年 | 230篇 |
| 1991年 | 187篇 |
| 1990年 | 176篇 |
| 1989年 | 173篇 |
| 1988年 | 179篇 |
| 1987年 | 152篇 |
| 1986年 | 155篇 |
| 1985年 | 136篇 |
| 1984年 | 139篇 |
| 1983年 | 146篇 |
| 1982年 | 134篇 |
| 1981年 | 95篇 |
| 1980年 | 106篇 |
| 1979年 | 118篇 |
| 1978年 | 94篇 |
| 1977年 | 93篇 |
| 1976年 | 111篇 |
| 1975年 | 97篇 |
| 1974年 | 92篇 |
| 1971年 | 84篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
1.
2.
3.
4.
5.
Dan Azagury Tara E Mokhtari Luis Garcia Ulysses S Rosas Trit Garg Homero Rivas John Morton 《Surgery》2019,165(3):565-570
Background
Laparoscopic Roux-en-Y gastric bypass, laparoscopic sleeve gastrectomy, and laparoscopic adjustable gastric banding all lead to substantial weight loss in obese patients. Long-term weight loss can be highly variable beyond 1-year postsurgery. This study examines and compares the frequency distribution of weight loss and lack of treatment effect rates after laparoscopic Roux-en-Y gastric bypass, laparoscopic sleeve gastrectomy, and laparoscopic adjustable gastric banding.Methods
A total of 1,331 consecutive patients at a single academic institution were reviewed from a prospectively collected database. Preoperative data collected included demographics, body mass index, and percent excess weight loss. Postoperative BMI and %EWL were collected at 12, 24, and 36 months. Percent excess weight loss was analyzed by the percentiles of excess weight lost, and the distribution of percent excess weight loss was evaluated in 10% increments. Lack of a successful treatment effect was defined as <25% excess weight loss.Results
Of the 1,331 patients, 72.4% (963) underwent laparoscopic Roux-en-Y gastric bypass, 18.3% (243) laparoscopic sleeve gastrectomy, and 9.4%(125) laparoscopic adjustable gastric banding. Mean percent excess weight loss was greatest for laparoscopic Roux-en-Y gastric bypass, followed by laparoscopic sleeve gastrectomy, and then by laparoscopic adjustable gastric banding at every time point: at 2 years mean percent excess weight loss was 77.9± 24.4 for laparoscopic Roux-en-Y gastric bypass, 50.8 ± 25.8 for laparoscopic sleeve gastrectomy, and 40.8± 25.9 for laparoscopic adjustable gastric banding (P < .0001). The rates of a successful treatment effect s for laparoscopic Roux-en-Y gastric bypass, laparoscopic sleeve gastrectomy, and laparoscopic adjustable gastric banding were 0.9%, 5.2%, and 24.3% at 1 year; 0.3%, 11.1%, and 26.0% at 2 years; and 1.0%, 25.3%, and 30.2% at 3 years. At 1 year, the odds ratio of lack of a successful treatment effect of laparoscopic sleeve gastrectomy versus laparoscopic Roux-en-Y gastric bypass was 6.305 (2.125–19.08; P?=?.0004), the odds ratio for laparoscopic adjustable gastric banding versus laparoscopic Roux-en-Y gastric bypass was 36.552 (15.64–95.71; P < .0001), and the odds ratio for laparoscopic adjustable gastric banding versus laparoscopic sleeve gastrectomy was 5.791 (2.519–14.599; P < .0001). At 2 years, the odds ratio for laparoscopic sleeve gastrectomy versus laparoscopic Roux-en-Y gastric bypass increased to 70.7 (9.4–531.7; P < .0001), the odds ratio for laparoscopic adjustable gastric banding versus laparoscopic Roux-en-Y gastric bypass increased to 128.1 (16.8–974.3; P < .0001), and the odds ratio for laparoscopic adjustable gastric banding versus laparoscopic sleeve gastrectomy decreased to 1.8 (0.9–3.6; P?=?.09).Conclusion
This study emphasizes the existing variability in weight loss across bariatric procedures as well as in the lack of a treatment effect for each procedure. Although laparoscopic adjustable gastric banding has the greatest rate of a lack of a successful treatment effect, the rate remained stable over 3 years postoperatively. Laparoscopic sleeve gastrectomy showed a doubling in the rate of a lack of a successful treatment effect every year reaching 25% at year 3. The rates for lack of a successful treatment effect for laparoscopic Roux-en-Y gastric bypass remained stable at about 1% for the first 3 years postoperatively. 相似文献6.
7.
Recognizing and managing a deteriorating patient: a randomized controlled trial investigating the effectiveness of clinical simulation in improving clinical performance in undergraduate nursing students 
下载免费PDF全文
下载免费PDF全文 8.
Thomas Donohue Morton J. Kern Richard Bach Frank Aguirre Thomas Wolford 《Catheterization and cardiovascular interventions》1993,28(2):155-161
The vasomotor response of native human collateral vessels to pharmacologic or hemodynamic vasodilatory stimuli is not well known. We describe a case where retrograde collateral flow velocity was measured both at baseline and following selected hemodynamic and pharmacologic interventions. This index case represents the first in a series of potential human physiologic studies designed to address questions pertaining to control of collateral blood supply in humans. © 1993 Wiley-Liss, Inc. 相似文献
9.
Fine needle aspiration cytology of lesions of the head and neck and factors affecting outcome 总被引：1，自引：0，他引：1
K D Morton 《Scottish medical journal》1989,34(5):523-525
Fine Needle Aspiration Cytology (F.N.A.C.) has been used as a diagnostic tool by the ENT departments in Tayside since the end of 1985. This paper discusses the results of our initial experience with this and outlines some of the diagnostic pitfalls. This is a useful and accurate procedure with many advantages over diagnostic biopsy. 相似文献
10.