全文获取类型
| 收费全文 | 91305篇 |
| 免费 | 5943篇 |
| 国内免费 | 2606篇 |
专业分类
| 耳鼻咽喉 | 352篇 |
| 儿科学 | 1206篇 |
| 妇产科学 | 814篇 |
| 基础医学 | 5171篇 |
| 口腔科学 | 351篇 |
| 临床医学 | 13654篇 |
| 内科学 | 31467篇 |
| 皮肤病学 | 129篇 |
| 神经病学 | 3705篇 |
| 特种医学 | 6228篇 |
| 外国民族医学 | 2篇 |
| 外科学 | 9401篇 |
| 综合类 | 15195篇 |
| 现状与发展 | 7篇 |
| 预防医学 | 2331篇 |
| 眼科学 | 502篇 |
| 药学 | 5913篇 |
| 57篇 | |
| 中国医学 | 2704篇 |
| 肿瘤学 | 665篇 |
出版年
| 2024年 | 135篇 |
| 2023年 | 1353篇 |
| 2022年 | 2498篇 |
| 2021年 | 3861篇 |
| 2020年 | 3509篇 |
| 2019年 | 3128篇 |
| 2018年 | 3052篇 |
| 2017年 | 2655篇 |
| 2016年 | 2680篇 |
| 2015年 | 2991篇 |
| 2014年 | 6239篇 |
| 2013年 | 5991篇 |
| 2012年 | 5080篇 |
| 2011年 | 5679篇 |
| 2010年 | 4685篇 |
| 2009年 | 4623篇 |
| 2008年 | 4816篇 |
| 2007年 | 5019篇 |
| 2006年 | 4424篇 |
| 2005年 | 3752篇 |
| 2004年 | 2945篇 |
| 2003年 | 2564篇 |
| 2002年 | 2129篇 |
| 2001年 | 2032篇 |
| 2000年 | 1559篇 |
| 1999年 | 1376篇 |
| 1998年 | 1395篇 |
| 1997年 | 1325篇 |
| 1996年 | 1014篇 |
| 1995年 | 1007篇 |
| 1994年 | 822篇 |
| 1993年 | 737篇 |
| 1992年 | 646篇 |
| 1991年 | 570篇 |
| 1990年 | 461篇 |
| 1989年 | 391篇 |
| 1988年 | 372篇 |
| 1987年 | 337篇 |
| 1986年 | 278篇 |
| 1985年 | 325篇 |
| 1984年 | 275篇 |
| 1983年 | 176篇 |
| 1982年 | 223篇 |
| 1981年 | 168篇 |
| 1980年 | 134篇 |
| 1979年 | 123篇 |
| 1978年 | 94篇 |
| 1977年 | 69篇 |
| 1976年 | 56篇 |
| 1975年 | 32篇 |
排序方式： 共有10000条查询结果，搜索用时 0 毫秒
11.
12.
Elizabeth D. Krebs Robert B. Hawkins J. Hunter Mehaffey Clifford E. Fonner Alan M. Speir Mohammed A. Quader Jeffrey B. Rich Leora T. Yarboro Nicholas R. Teman Gorav Ailawadi 《The Journal of thoracic and cardiovascular surgery》2019,157(4):1533-1542.e2
Objectives
Expedient extubation after cardiac surgery has been associated with improved outcomes, leading to postoperative extubation frequently during overnight hours. However, recent evidence in a mixed medical-surgical intensive care unit population demonstrated worse outcomes with overnight extubation. This study investigated the impact of overnight extubation in a statewide, multicenter Society of Thoracic Surgeons database.Methods
Records from 39,812 patients undergoing coronary artery bypass grafting or valve operations (2008-2016) and extubated within 24 hours were stratified according to extubation time between 06:00 and 18:00 (day) or between 18:00 and 6:00 (overnight). Outcomes including reintubation, mortality, and composite morbidity-mortality were evaluated using hierarchical regression models adjusted for Society of Thoracic Surgeons predictive risk scores. To further analyze extubation during the night, a subanalysis stratified patients into 3 groups: 06:00 to 18:00, 18:00 to 24:00, and 24:00 to 06:00.Results
A total of 20,758 patients were extubated overnight (52.1%) and were slightly older (median age 66 vs 65 years, P < .001) with a longer duration of ventilation (4 vs 7 hours, P < .001). Day and overnight extubation were associated with equivalent operative mortality (1.7% vs 1.7%, P = .880), reintubation (3.7% vs 3.4%, P = .141), and composite morbidity-mortality (8.2% vs 8.0%, P = .314). After risk adjustment, overnight extubation was not associated with any difference in reintubation, mortality, or composite morbidity-mortality. On subanalysis, those extubated between 24:00 and 06:00 exhibited increased composite morbidity-mortality (odds ratio, 1.18; P = .001) but no difference in reintubation or mortality.Conclusions
Extubation overnight was not associated with increased mortality or reintubation. These results suggest that in the appropriate clinical setting, it is safe to routinely extubate cardiac surgery patients overnight. 相似文献13.
14.
15.
16.
《Journal of vascular and interventional radiology : JVIR》2020,31(7):1103-1109
PurposeTo explore the safety and effectiveness of bronchial artery (BA) embolization (BAE) in children with pulmonary hemorrhage.Materials and MethodsBetween February 2016 and February 2019, 41 patients (median age, 4 y; interquartile range, 2.3-8 y; median weight, 17.6 kg; interquartile range, 12.3–23.6 kg) underwent BAE. The indication of BAE included massive hemoptysis in 10 patients (24.4%), recurrent hemoptysis in 18 patients (43.9%), and refractory anemia in 13 patients (31.7%). The main etiology of pulmonary hemorrhage included pulmonary hemosiderosis (58.5%), congenital heart disease (17.1%), and infection (14.6%). A retrospective review was conducted of clinical outcomes of BAE.ResultsThere were 44 embolization sessions, with a total of 137 embolized vessels. Pulmonary hemorrhage was caused by BAs in 30 cases, nonbronchial systemic arteries plus BAs in 10, and nonbronchial systemic arteries in 1. Embolic particles were used in 30 cases (24 polyvinyl alcohol [PVA] and 6 microsphere), coils in 9 cases, and particles plus coils in 5 cases (4 PVA and 1 microsphere). Technical success (ability to embolize abnormal vessel) was achieved in 97.6% of patients (40 of 41), and clinical success (complete or partial resolution of hemoptysis within 30 days of embolization) was achieved in 90.2% (37 of 41). There was 1 procedure-related complication (2.4%) of cerebral infarction and 1 death from multiple-organ dysfunction (2.4%). Bleeding-free survival rates at 6, 12, 24, and 36 months were 92.5%, 83.9%, 83.9%, and 70.8%, respectively.ConclusionsBAE is a safe and effective procedure in children with pulmonary hemorrhage. 相似文献
17.
18.
19.
20.
《Clinical gastroenterology and hepatology》2022,20(5):1112-1121.e4
- Download : Download high-res image (419KB)
- Download : Download full-size image