首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   15679篇
  免费   535篇
  国内免费   58篇
耳鼻咽喉   31篇
儿科学   524篇
妇产科学   165篇
基础医学   797篇
口腔科学   127篇
临床医学   5307篇
内科学   1861篇
皮肤病学   104篇
神经病学   580篇
特种医学   136篇
外科学   1635篇
综合类   1570篇
预防医学   1891篇
眼科学   68篇
药学   1006篇
  11篇
中国医学   180篇
肿瘤学   279篇
  2024年   26篇
  2023年   456篇
  2022年   846篇
  2021年   901篇
  2020年   736篇
  2019年   1125篇
  2018年   994篇
  2017年   593篇
  2016年   450篇
  2015年   468篇
  2014年   1199篇
  2013年   1090篇
  2012年   988篇
  2011年   1106篇
  2010年   778篇
  2009年   565篇
  2008年   442篇
  2007年   348篇
  2006年   284篇
  2005年   239篇
  2004年   204篇
  2003年   134篇
  2002年   98篇
  2001年   93篇
  2000年   91篇
  1999年   94篇
  1998年   90篇
  1997年   63篇
  1996年   65篇
  1995年   53篇
  1994年   45篇
  1993年   38篇
  1992年   38篇
  1991年   37篇
  1990年   27篇
  1989年   28篇
  1988年   26篇
  1985年   135篇
  1984年   174篇
  1983年   138篇
  1982年   138篇
  1981年   132篇
  1980年   112篇
  1979年   99篇
  1978年   95篇
  1977年   77篇
  1976年   89篇
  1975年   74篇
  1974年   37篇
  1973年   54篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
《Australian critical care》2022,35(4):408-414
BackgroundClinically significant post-traumatic stress symptoms (PTSS) have been reported in up to a quarter of paediatric intensive care unit (PICU) survivors. Ongoing PTSS negatively impacts children's psychological development and physical recovery. However, few data regarding associations between potentially modifiable PICU treatment factors, such as analgosedatives and invasive procedures, and children's PTSS have been reported.ObjectivesWe sought to investigate the medical treatment factors associated with children's PTSS after PICU discharge.MethodsA prospective longitudinal cohort study was conducted in two Australian tertiary referral PICUs. Children aged 2-16 y admitted to the PICU between June 2008 and January 2011 for >8 h and <28 d were eligible for participation. Biometric and clinical data were obtained from medical records. Parents reported their child's PTSS using the Trauma Symptom Checklist for Young Children at 1, 3, 6, and 12 months after discharge. Logistic regression was used to assess potential associations between medical treatment and PTSS.ResultsA total of 265 children and their parents participated in the study. In the 12-month period following PICU discharge, 24% of children exhibited clinically elevated PTSS. Median risk of death (Paediatric Index of Mortality 2 [PIM2]) score was significantly higher in the PTSS group (0.31 [IQR 0.14–1.09] v 0.67 [IQR 0.20–1.18]; p = 0.014). Intubation and PICU and hospital length of stay were also significantly associated with PTSS at 1 month, as were midazolam, propofol, and morphine. After controlling for gender, reason for admission, and PIM2 score, only midazolam was significantly and independently associated with PTSS and only at 1 month (adjusted odds ration (aOR) 3.63, 95% CI 1.18, 11.12, p = 0.024). No significant relationship was observed between the use of medications and PTSS after 1 month.ConclusionsElevated PTSS were evident in one quarter (24%) of children during the 12 months after PICU discharge. One month after discharge, elevated PTSS were most likely to occur in children who had received midazolam therapy.  相似文献   
12.
13.
This paper explores how organisational structure, policies and practices in healthcare can inadvertently disadvantage marginalised populations (e.g. individuals from ethnic minority backgrounds) and reinforce health inequalities. We draw upon three diverse UK healthcare settings (long term care institutions, high security hospitals and community pharmacies) to illustrate how systemic injustices negatively impact on access to care, treatment and health outcomes. The first case study considers the care of older people within nursing homes; specifically the disempowering effects of this service structure and impacts of choice reduction upon health and their access to health provision. The second case study explores the impact of security restrictions upon patients within high security hospitals, focusing particularly on the maintenance of relationships and support networks outside of the hospital. The third and final case study, draws upon a national community pharmacy medicine management service to illustrate ways in which policies and guidelines inadvertently obstruct patients' engagement with the service within a community setting. We draw upon these settings to highlight inequalities within different contexts and to illustrate the ways in which well intended services can inadvertently disadvantage marginalised communities in multiple ways.  相似文献   
14.
15.
16.
[目的]探讨产前分娩预演对初产妇自然分娩成功率和产后并发症的影响.[方法]收集2016年9月至2018年10月在本院妇产科分娩的初产妇86例,按产前分娩教育方式分为观察组(n=42)和对照组(n=44).对照组孕妇产前接受常规产前健康教育课程培训,观察组在对照组的基础上进行分娩预演实践.比较两组自我效能感量表(GSES)、抑郁自评量表(SDS)和焦虑自评量表(SAS)评分及自然分娩成功率和产后并发症发生率等.[结果]与对照组相比,观察组分娩总产程和第一、二、三明显缩短;新生儿窒息率和产后SDS、SAS评分均明显降低;自然分娩成功率、GSES评分均明显提高,其差异均有统计学意义(P<0.05).观察组产后出血、感染、尿潴留、乳汁淤积发生率及总并发症发生率均低于对照组(P<0.05).[结论]采用常规产前健康教育培训结合产前分娩预演实践的产前管理方式,可有效提高初产妇自然分娩成功率,缩短产程,减少产后并发症的发生,值得临床推广应用.  相似文献   
17.

Introduction

The fast track / ultra-fast-track protocols are techniques used to optimise the patient care process and a quick recovery after cardiac surgery. They are one of the mainstays of efficient practice. With their use, the length of hospital and intensive care unit (ICU) stays are reduced, with a direct impact on costs and the quality of the health service.

Objective

To compare the length of stay in the ICU, length of hospital stay, and post-operative mortality in ultra-fast-track extubated (uFTE) patients and those with conventional extubation (CE) after cardiac surgery.

Methods

Longitudinal, analytical, retrospective study was conducted, with the period between the time of surgery and discharge being included as the study period.

Results

A total of 396 patients older than 18 years who required cardiac surgery were included, of whom 207 patients had (uFTE) and 189 had CE. Although the groups were not comparable due to the statistical differences found, when performing the multivariate adjustment, uFTE maintained its statistical independence and was associated with lower cardiovascular morbidity, such as myocardial ischaemia (95% CI: 0.37-0.86; P = .01) and lower post-surgical vasopressor requirement (95% CI: 0.18-0.49; P < .01). No significant differences were found in the length of hospital stay, ICU stay, or post-operative mortality in the ICU.

Conclusion

Implementing the uFTE strategy, decreases cardiovascular morbidity and vasopressor requirement. The change to uFTE should be accompanied by changes in models and practices in patient recovery to standardised protocols. This study shows that uFTE did not reduce the length of ICU stay, hospital stay, or mortality.  相似文献   
18.
On February 20, 2020, a man living in the north of Italy was admitted to the emergency room with an atypical pneumonia that later proved to be COVID-19. This was the trigger of one of the most serious clusters of COVID-19 in the world, outside of China. Despite aggressive restraint and inhibition efforts, COVID-19 continues to increase, and the total number of infected patients in Italy is growing daily. After 6 weeks, the total number of patients reached 128,948 cases (April 5, 2020), with the higher case-fatality rate (15,887 deaths) dominated by old and very old patients.This sudden health emergency severely challenged the Italian Health System, in particular acute care hospitals and intensive care units. In 1 hospital, geriatric observation units were created, the experience of which can be extremely useful for European countries, the United States, and all countries that in the coming days will face a similar situation.  相似文献   
19.

Aim

The purpose of this study is to find out whether telephone referral from Primary Health Care to Internal Medicine Consult manages to reduce waiting days as compared to traditional referral. This study also aims to know how acceptable is the telephone referral to general practitioners and their patients.

Design

No blind randomized controlled clinical trial.

Setting

Northern Huelva Health District.

Participants

154 patients.

Interventions

Patients referrals from intervention clinicians were sent via telephone consultation, whereas patients referrals from control clinicians were sent by traditional via.

Measurements

Number of days from referral request to Internal Medicine Consult. Number of telephone and traditional referrals. Number of doctors and patients denied. Denial reasons.

Results

A statistically significant difference was found between groups, with an average of 27 (21-34) days. Among General Practitioners, 8 of the first 58 total doctors after randomization and, subsequently, 6 of the 20 doctors of the test group refused to engage in the trial because they considered “excessive time and effort consuming”. 50% of patients referred by the 14 General Practitioners finally randomized to the intervention group were denied referral by telephone due to patient's complexity.

Conclusions

Telephone referral significantly reduces waiting days for Internal Medicine consult. This type of referral did not mean an “excessive time and effort consuming” to General Practitioners and was not all that beneficial to complex patients  相似文献   
20.
目的 系统评价有关癌症患者心理韧性发展的真实体验,为更好地制定心理韧性干预方案提供理论依据。方法 计算机检索Cochrane Library、Medline、CINAHL、Embase、PubMed、Web of Science、Psyc INFO以及中国生物医学文献数据库、中国知网、维普、万方数据库从建库至2019年6月相关的质性研究。采用澳大利亚乔安娜布里格斯研究所循证卫生保健中心质性研究质量评价标准(2016)对文献进行评价,采用汇集性整合方法进行结果整合。结果 共纳入10篇文献,提炼42个明确的结果,形成8个类别,汇总成3个整合结果。①心理韧性发展是动态循环的过程:危机负性期,调节成长期,积极转化期,循环强化期;②心理韧性的阻碍因素:个体(消极应对,错误认知,症状和体象困扰),环境(传统社会文化,医疗环境,家庭负担);③心理韧性的保护因素:个体(积极心理与应对方式,复原经历,宗教信仰,自我表露,利他主义与行为),环境(家庭因素,医疗照护,人际支持)。结论 心理韧性的发展是动态循环过程,受个体和环境因素影响,医护人员应根据不同阶段的影响因素给予针对性护理措施,促进患者心理韧性的形成和发展,提高患者的生活质量。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号