全文获取类型
收费全文 | 61038篇 |
免费 | 7123篇 |
国内免费 | 449篇 |
专业分类
耳鼻咽喉 | 1012篇 |
儿科学 | 1370篇 |
妇产科学 | 1240篇 |
基础医学 | 8817篇 |
口腔科学 | 857篇 |
临床医学 | 6344篇 |
内科学 | 13035篇 |
皮肤病学 | 2165篇 |
神经病学 | 5479篇 |
特种医学 | 3081篇 |
外科学 | 8553篇 |
综合类 | 561篇 |
现状与发展 | 1篇 |
一般理论 | 16篇 |
预防医学 | 4275篇 |
眼科学 | 1919篇 |
药学 | 4713篇 |
中国医学 | 439篇 |
肿瘤学 | 4733篇 |
出版年
2023年 | 966篇 |
2022年 | 780篇 |
2021年 | 1798篇 |
2020年 | 1242篇 |
2019年 | 1467篇 |
2018年 | 2108篇 |
2017年 | 1852篇 |
2016年 | 2260篇 |
2015年 | 2659篇 |
2014年 | 3226篇 |
2013年 | 3611篇 |
2012年 | 4498篇 |
2011年 | 4375篇 |
2010年 | 2937篇 |
2009年 | 2675篇 |
2008年 | 3228篇 |
2007年 | 3043篇 |
2006年 | 2880篇 |
2005年 | 2639篇 |
2004年 | 2258篇 |
2003年 | 1999篇 |
2002年 | 1792篇 |
2001年 | 1093篇 |
2000年 | 994篇 |
1999年 | 906篇 |
1998年 | 490篇 |
1997年 | 456篇 |
1996年 | 367篇 |
1995年 | 370篇 |
1994年 | 288篇 |
1993年 | 299篇 |
1992年 | 638篇 |
1991年 | 658篇 |
1990年 | 553篇 |
1989年 | 609篇 |
1988年 | 601篇 |
1987年 | 582篇 |
1986年 | 500篇 |
1985年 | 497篇 |
1984年 | 397篇 |
1983年 | 335篇 |
1982年 | 258篇 |
1981年 | 229篇 |
1980年 | 206篇 |
1979年 | 299篇 |
1978年 | 259篇 |
1977年 | 186篇 |
1974年 | 202篇 |
1973年 | 221篇 |
1972年 | 176篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Raymond J. Chan RN PhD Vivienne E. Milch MBBS MHPol Fiona Crawford-Williams PhD Oluwaseyifunmi Andi Agbejule BRadTherapy Ria Joseph MNutrDiet Jolyn Johal BND Narayanee Dick BSc Matthew P. Wallen PhD Julie Ratcliffe PhD Anupriya Agarwal MBBS Larissa Nekhlyudov MD Matthew Tieu PhD Manaf Al-Momani BPharm Scott Turnbull PhD Rahul Sathiaraj MPH Dorothy Keefe MBBS MD Nicolas H. Hart PhD 《CA: a cancer journal for clinicians》2023,73(6):565-589
Patient navigation is a strategy for overcoming barriers to reduce disparities and to improve access and outcomes. The aim of this umbrella review was to identify, critically appraise, synthesize, and present the best available evidence to inform policy and planning regarding patient navigation across the cancer continuum. Systematic reviews examining navigation in cancer care were identified in the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, Embase, Cumulative Index of Nursing and Allied Health (CINAHL), Epistemonikos, and Prospective Register of Systematic Reviews (PROSPERO) databases and in the gray literature from January 1, 2012, to April 19, 2022. Data were screened, extracted, and appraised independently by two authors. The JBI Critical Appraisal Checklist for Systematic Review and Research Syntheses was used for quality appraisal. Emerging literature up to May 25, 2022, was also explored to capture primary research published beyond the coverage of included systematic reviews. Of the 2062 unique records identified, 61 systematic reviews were included. Fifty-four reviews were quantitative or mixed-methods reviews, reporting on the effectiveness of cancer patient navigation, including 12 reviews reporting costs or cost-effectiveness outcomes. Seven qualitative reviews explored navigation needs, barriers, and experiences. In addition, 53 primary studies published since 2021 were included. Patient navigation is effective in improving participation in cancer screening and reducing the time from screening to diagnosis and from diagnosis to treatment initiation. Emerging evidence suggests that patient navigation improves quality of life and patient satisfaction with care in the survivorship phase and reduces hospital readmission in the active treatment and survivorship care phases. Palliative care data were extremely limited. Economic evaluations from the United States suggest the potential cost-effectiveness of navigation in screening programs. 相似文献
2.
3.
Moderate sedatives have been increasingly used to improve patient comfort during flexible bronchoscopy (FB). However, routine use of moderate sedation during FB is controversial because its efficacy and safety are not well established.This study aims to evaluate the efficacy and safety of moderate sedation during FB.A search was made of Medline, EMBASE, and the Cochrane Library to May 2014.Randomized controlled trials (RCTs) and quasi-RCTs were included.The main analysis was designed to examine the efficacy of moderate sedation during FB in sedation than no-sedation.The willingness to repeat FB was significantly more in sedation than no-sedation (odds ratio [OR] 2.30; 95% confidence interval [CI] 1.11–4.73; P = 0.02; I2 = 22.5). The duration of FB was shorter in sedation group than no-sedation group (standardized mean difference [SMD] −0.21; 95% CI −0.38 to −0.03; P = 0.02; I2 = 78.3%). Event of hypoxia was not significantly different between sedation and no-sedation groups (OR 0.86; 95% CI 0.42–1.73; P = 0.67; I2 = 0%). The SpO2 during procedure was not different between sedation and no-sedation groups (SMD −0.14; 95% CI −0.37 to 0.08; P = 0.21; I2 = 49.9%). However, in subgroup analysis without supplemental oxygen, the SpO2 was significantly lower in sedation than no-sedation group (SMD −0.45; 95% CI −0.78 to −0.11; P = 0.01; I2 = 0.0%).According to this meta-analysis, moderate sedation in FB would be useful in patients who will require repeated bronchoscopies as well as safe in respiratory depression. To our knowledge, although the various sedative drugs are already used in the real field, this analysis was the first attempt to quantify objective results. We anticipate more definite and studies designed to elucidate standardized outcomes for moderate sedation in FB. 相似文献
4.
5.
Hyun Jong Choi Jong Ho Moon Yun Nah Lee Hyun Su Kim Ji Su Ha Tae Hoon Lee Sang‐Woo Cha Young Deok Cho Sang‐Heum Park 《Digestive endoscopy》2015,27(7):772-775
Direct peroral cholangioscopy (POC) using an ultra‐slim upper endoscope is one modality of POC for intraductal endoscopic evaluation and treatment of the bile duct. Choledochoduodenostomy (CDS) is one modality of biliary bypass surgery that provides a new route to the bile duct. We carried out direct POC using an ultra‐slim upper endoscope without the use of accessories in 10 patients (four sump syndromes, three bile duct strictures and three intrahepatic duct stones) previously undergoing surgical CDS. Direct POC was successful in all patients. The use of an intraductal balloon catheter was required in one patient for advancement of the endoscope into the bile duct. Distal bile ducts with sump syndromes were cleared using baskets and water irrigation under direct POC. Cholangiocarcinoma was diagnosed in one patient with hilar bile duct stricture after cholangioscopic evaluation and a targeting forceps biopsy under direct POC. Intrahepatic duct stones were successfully extracted after intraductal fragmentation under direct POC. Oozing bleeding occurred during intraductal lithotripsy but stopped spontaneously. Direct POC using an ultra‐slim upper endoscope without the assistance of accessories can easily be carried out in patients undergoing CDS. 相似文献
6.
7.
Nurse perceptions of the Nursing Delirium Screening Scale in two palliative care inpatient units: a focus group study 下载免费PDF全文
8.
9.
10.