收费全文 | 4942篇 |
免费 | 258篇 |
国内免费 | 18篇 |
耳鼻咽喉 | 75篇 |
儿科学 | 320篇 |
妇产科学 | 69篇 |
基础医学 | 422篇 |
口腔科学 | 185篇 |
临床医学 | 411篇 |
内科学 | 1138篇 |
皮肤病学 | 88篇 |
神经病学 | 240篇 |
特种医学 | 130篇 |
外科学 | 815篇 |
综合类 | 137篇 |
一般理论 | 2篇 |
预防医学 | 202篇 |
眼科学 | 149篇 |
药学 | 490篇 |
中国医学 | 39篇 |
肿瘤学 | 306篇 |
2023年 | 54篇 |
2022年 | 61篇 |
2021年 | 258篇 |
2020年 | 148篇 |
2019年 | 158篇 |
2018年 | 220篇 |
2017年 | 162篇 |
2016年 | 189篇 |
2015年 | 201篇 |
2014年 | 285篇 |
2013年 | 339篇 |
2012年 | 448篇 |
2011年 | 476篇 |
2010年 | 257篇 |
2009年 | 207篇 |
2008年 | 241篇 |
2007年 | 236篇 |
2006年 | 226篇 |
2005年 | 170篇 |
2004年 | 135篇 |
2003年 | 122篇 |
2002年 | 79篇 |
2001年 | 56篇 |
2000年 | 47篇 |
1999年 | 34篇 |
1998年 | 22篇 |
1997年 | 19篇 |
1996年 | 7篇 |
1995年 | 9篇 |
1994年 | 9篇 |
1993年 | 8篇 |
1992年 | 19篇 |
1991年 | 30篇 |
1990年 | 26篇 |
1989年 | 27篇 |
1988年 | 37篇 |
1987年 | 23篇 |
1986年 | 20篇 |
1985年 | 27篇 |
1984年 | 9篇 |
1983年 | 10篇 |
1979年 | 21篇 |
1978年 | 21篇 |
1977年 | 6篇 |
1976年 | 6篇 |
1973年 | 5篇 |
1972年 | 4篇 |
1970年 | 4篇 |
1969年 | 10篇 |
1968年 | 5篇 |
Robotic approaches have been steadily replacing laparoscopic approaches in metabolic and bariatric surgeries (MBS); however, their superiority has not been rigorously evaluated. The main goal of the study was to evaluate the 5-year utilization trends of robotic MBS and to compare to laparoscopic outcomes.
MethodsRetrospective analysis of 2015–2019 MBSAQIP data. Kruskal-Wallis test/Wilcoxon and Fisher’s exact/chi-square were used to compare continuous and categorical variables, respectively. Generalized linear models were used to compare surgery outcomes.
ResultsThe use of robotic MBS increased from 6.2% in 2015 to 13.5% in 2019 (N= 775,258). Robotic MBS patients had significantly higher age, BMI, and likelihood of 12 diseases compared to laparoscopic patients. After adjustment, robotic MBS patients showed higher 30-day interventions and 30-day readmissions alongside longer surgery time (26–38 min).
ConclusionRobotic MBS shows higher intervention and readmission even after controlling for cofounding variables.
Graphical Abstract 相似文献Methods: The electroencephalogram was recorded during cooling and rewarming in 14 patients undergoing hypothermic cardiopulmonary bypass and circulatory arrest. Data were digitized at 128 Hz, and approximate entropy was calculated from 8-s intervals. The dose-response relationship was derived using sigmoidal curve-fitting techniques, and statistical analysis was performed using analysis of variance techniques.
Results: The approximate entropy of the electroencephalogram changed in a sigmoidal fashion during cooling and rewarming. The midpoint of the curve averaged 24.7[degrees]C during cooling and 28[degrees]C (not significant) during rewarming. The temperature corresponding to 5% entropy (T0.05) was 18.7[degrees]C. The temperature corresponding to 95% entropy (T0.95) was 31.3[degrees]C during cooling and 38.2[degrees]C during rewarming (P < 0.02). 相似文献