全文获取类型
收费全文 | 5604篇 |
免费 | 323篇 |
国内免费 | 65篇 |
专业分类
耳鼻咽喉 | 58篇 |
儿科学 | 74篇 |
妇产科学 | 25篇 |
基础医学 | 631篇 |
口腔科学 | 797篇 |
临床医学 | 555篇 |
内科学 | 349篇 |
皮肤病学 | 29篇 |
神经病学 | 262篇 |
特种医学 | 932篇 |
外科学 | 684篇 |
综合类 | 758篇 |
预防医学 | 437篇 |
眼科学 | 57篇 |
药学 | 163篇 |
5篇 | |
中国医学 | 51篇 |
肿瘤学 | 125篇 |
出版年
2024年 | 16篇 |
2023年 | 135篇 |
2022年 | 254篇 |
2021年 | 272篇 |
2020年 | 244篇 |
2019年 | 187篇 |
2018年 | 160篇 |
2017年 | 154篇 |
2016年 | 179篇 |
2015年 | 191篇 |
2014年 | 361篇 |
2013年 | 362篇 |
2012年 | 333篇 |
2011年 | 338篇 |
2010年 | 282篇 |
2009年 | 316篇 |
2008年 | 244篇 |
2007年 | 253篇 |
2006年 | 243篇 |
2005年 | 211篇 |
2004年 | 185篇 |
2003年 | 168篇 |
2002年 | 95篇 |
2001年 | 86篇 |
2000年 | 76篇 |
1999年 | 78篇 |
1998年 | 57篇 |
1997年 | 54篇 |
1996年 | 43篇 |
1995年 | 49篇 |
1994年 | 42篇 |
1993年 | 26篇 |
1992年 | 36篇 |
1991年 | 28篇 |
1990年 | 20篇 |
1989年 | 14篇 |
1988年 | 23篇 |
1987年 | 16篇 |
1986年 | 18篇 |
1985年 | 33篇 |
1984年 | 20篇 |
1983年 | 14篇 |
1982年 | 9篇 |
1980年 | 4篇 |
1979年 | 9篇 |
1978年 | 9篇 |
1977年 | 10篇 |
1976年 | 9篇 |
1974年 | 6篇 |
1973年 | 8篇 |
排序方式: 共有5992条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Background Context
Long-term follow-up of patient-reported outcome measures (PROM) is essential in both modern spinal care and research. Lack of time and staff are commonly reported barriers to implementing long-term follow-up of PROM. Automated and digital follow-up systems for PROM collection are seeing widespread use, yet their validity and comparative effectiveness have never been evaluated.Purpose
The present study aimed to assess the validity of digital follow-up systems in comparison with the conventional paper-based follow-up (PB-FU).Study Design
This is a retrospective analysis of prospectively collected double follow-up data.Patient Sample
Patients who underwent lumbar spinal fusion for spondylolisthesis or degenerative disc disease between 2013 and 2016 were included in the study.Outcome Measures
The study determined the Oswestry Disability Index (ODI) and Numeric Rating Scale (NRS) for back and leg pain severity at baseline, 6 weeks, 12 months, and 24 months.Materials and Methods
After lumbar spinal fusion surgery, a double follow-up of PROM was carried out by conventional PB-FU during clinical visits, while simultaneously completing an automatically dispatched digital follow-up questionnaire. As the primary end point, we assessed the intraindividual discrepancy in PROM between PB-FU and automated digital follow-up (AD-FU).Results
Forty patients completed all parts of the dual follow-up trajectory and were analyzed. We detected no discrepancy in ODI or NRS for back and leg pain severity at any of the baseline, 6-week, 12-month, or 24 month follow-ups (all p>.05). This was confirmed in a sensitivity analysis.Conclusions
In an analysis of dual paper-based and digital follow-up after lumbar fusion surgery, patients report highly similar values using either method of follow-up. It appears that AD-FU without incentives produces lower response rates. To reassess the validity of these systems for data collection in spinal patient care, a prospective validation with higher statistical power is warranted. 相似文献5.
《ALTER. European Journal of Disability research, Journal europeen de recherche sur le handicap》2020,14(2):71-84
This article examines self-representations in a social media campaign against the discrimination of people with disabilities. We focus specifically on how these representations are related to various narratives and discourses, and in what ways the representations either adhere to or challenge normative discourses, or whether they offer counter-discourses. Considering that our cultural assumptions are influenced by the representations we are exposed to, we also discuss the possible potential of self-representations for the audience of the campaign. The empirical material consists of a digital activism campaign conducted on Instagram in Sweden that was constructed through self-representations (photos and short texts). The study combines discourse analysis and visual analysis with focus on how the persons present themselves in the campaign, how disability is mentioned and/or displayed, and how a presentation adheres to or challenges a model of understanding disability, such as the medical or social models. We found a diverse set of claims, all with the common goal of acknowledging discrimination, in order to make it visible and bring about change. The narratives identified indicate a variety of strategies for understanding disability and various styles that people adopt to relate to established discourses on disabilities. Through this campaign, the bloggers could find and provide support, but they also took the stage by requesting that the audience listen. The campaign examined in this study can be further understood as an effort and a step towards increased visibility and politicization of disability. 相似文献
6.
7.
本文提出了我国医疗器械产业中数字化技术发展中存在的主要问题,并分析了问题产生的原因。 相似文献
8.
目的:探讨运用DSA设备作吞咽功能检查的价值。材料和方法:用DSA设备对正常组24例,咽异感症患者32例,做上至颅底、下达第七颈椎平面的正侧位动态采集,了解吞咽状况,并行咽传输时间测定,进行对照研究。结果:正常对照组咽传输时间为1.441±0.302s,咽异感症患者咽传输时间为1.367±0.409s,两组结果相比统计学上无显著差异,但后者较易发生咽部钡剂滞留等改变。结论:DSA机由于采集速度快,不但在心血管检查及介入治疗方面有重要意义,而且在非血管性脏器的动力学检查中也起着一定的作用。由于能完整记录钡剂通过咽部的全过程,故此方法是吞咽功能检查的良好方法之一。 相似文献
9.
Research has shown that increasing numbers of teenagers are going online to find health information, but it is unclear whether there are disparities in the prevalence of online health seeking among young Internet users associated with social and economic conditions. Existing literature on Internet uses by adults indicates that low income, less educated, and minority individuals are less likely to be online health seekers. Based on the analysis of data from the Pew Internet and American Life Project for the US, this study finds that teens of low education parents are either as likely as or even more likely than teens of high education parents to seek online health information. Multiple regression analysis shows that the higher engagement in health seeking by teens of low education parents is related to a lower prevalence of parental Internet use, suggesting that some of these teens may be seeking online health information on behalf of their low education parents. Implications of these findings are discussed in relation to the issues of the digital divide and digital empowerment. 相似文献
10.
目的对成人阴茎进行三维数字化图像分析,为阴茎整形修复获得手术前后形变参数及手术方案的选择,提供精确的形态学数据。方法采用Angel数字快速测量诊断系统,分别测量200例正常成人阴茎安静状态和勃起时的长度、周长、以及勃起时角度与阴茎长度、周径的关系。结果随着年龄和身高增长,阴茎也随之增长;身高与阴茎长度不成正比;阴茎勃起时随着角度的增加硬度增强,但勃起硬度变化时阴茎体积无明显变化。结论从不同径线不同角度对阴茎进行计算机三维测量分析,为阴茎整形修复术前设计、术后效果评价提供重要的量化指标。 相似文献