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   7164篇
  免费   491篇
  国内免费   36篇
耳鼻咽喉   35篇
儿科学   218篇
妇产科学   152篇
基础医学   1355篇
口腔科学   184篇
临床医学   584篇
内科学   1545篇
皮肤病学   118篇
神经病学   531篇
特种医学   691篇
外国民族医学   1篇
外科学   822篇
综合类   88篇
一般理论   3篇
预防医学   288篇
眼科学   119篇
药学   474篇
  1篇
中国医学   4篇
肿瘤学   478篇
  2021年   74篇
  2020年   61篇
  2019年   72篇
  2018年   86篇
  2017年   83篇
  2016年   80篇
  2015年   117篇
  2014年   167篇
  2013年   223篇
  2012年   265篇
  2011年   276篇
  2010年   192篇
  2009年   198篇
  2008年   246篇
  2007年   266篇
  2006年   268篇
  2005年   241篇
  2004年   203篇
  2003年   228篇
  2002年   212篇
  2001年   175篇
  2000年   198篇
  1999年   192篇
  1998年   149篇
  1997年   133篇
  1996年   131篇
  1995年   113篇
  1994年   96篇
  1993年   103篇
  1992年   121篇
  1991年   114篇
  1990年   153篇
  1989年   165篇
  1988年   148篇
  1987年   143篇
  1986年   162篇
  1985年   185篇
  1984年   95篇
  1983年   76篇
  1981年   80篇
  1980年   70篇
  1979年   80篇
  1978年   75篇
  1977年   71篇
  1976年   53篇
  1975年   85篇
  1973年   55篇
  1972年   54篇
  1970年   54篇
  1969年   64篇
排序方式: 共有7691条查询结果,搜索用时 265 毫秒
21.
22.
23.
24.
25.
26.
W Vogel 《Die Rehabilitation》1982,21(3):116-122
Despite an increasing availability of smaller decentralized facilities, the main responsibility for provision of inpatient nursing and care of disabled persons continues to lie with the homes and institutions traditionally providing long-term services for disabled people. In Baden-Wuerttemberg, a total of 70 homes and institutions, which vary greatly in size and structure, as available, comprising a total of 10,457 places in their nursing and residential sections. By far the greatest portion of the existing places (78.5 percent) is provided by institutions catering people with mental retardation. The average utilisation of the places available in homes and institutions is 97.4 percent. Client population structure in the facilities for mentally retarded persons differs appreciably from that of other facilities. This applies in particular to client age and to the treatment and therapy the individual receives. According to a 1979-1980 survey, the waiting lists of the homes and institutions comprised 785 applications for admission of disabled persons among them 290 applications for urgent admission and 495 made for precautionary reasons. A total of 9,148 places are available in sheltered workshops in Baden-Wuerttemberg. Average utilisation is 92.2 percent. Workshop population structure is characterised by a high share of younger clients. Only few openings will therefore presumably contrast with a high number of applications for entry that are expected to be forth-coming The need for sheltered workshop places will therefore continue to rise over the years ahead.  相似文献   
27.

Purpose

This study assesses the impact of extracorporeal membrane oxygenation (ECMO) associated morbidities on long-term quality of life (QOL) outcomes.

Methods

A single center, retrospective review of neonatal and pediatric non-cardiac ECMO survivors from 1/2005–7/2016 was performed. The 2012 Pediatric Quality of Life Inventory? (PedsQL?) survey was administered. Clinical outcomes and QOL scores between groups were compared.

Results

Of 74 patients eligible, 64% (35 NICU, 12 PICU) completed the survey. Mean time since ECMO was 5.5 ± 3 years. ECMO duration for venoarterial (VA) and venovenous (VV) were similar (median 9 vs. 7.5 days, p = 0.09). VA ECMO had higher overall complication rate (64% vs. 36%, p = 0.06) and higher neurologic complication rate (52% vs. 9%, p = 0.002). ECMO mode and ICU type did not impact QOL. However, patients with neurologic complications (n = 15) showed a trend towards lower overall QOL (63/100 ± 20 vs. 74/100 ± 18, p = 0.06) compared to patients without neurologic complications. A subset analysis of patients with ischemic or hemorrhagic intracranial injuries (n = 13) had significantly lower overall QOL (59/100 ± 19 vs. 75/100 ± 18, p = 0.01) compared to patients without intracranial injuries.

Conclusion

Neurologic complication following ECMO is common, associated with VA mode, and negatively impacts long-term QOL. Given these associations, when clinically feasible, VV ECMO may be considered as first line ECMO therapy.

Type of study

Retrospective review.

Level of evidence

II  相似文献   
28.

Background

There has been increasing use of invasive techniques, such as extracorporeal organ support, in intensive care units (ICU), and declining autopsy rates. Thus, new measures are needed to maintain high-quality standards. We investigated the potential of computed tomography (CT)-based virtual autopsy to substitute for medical autopsy in this setting.

Methods

We investigated the potential of virtual autopsy by post-mortem CT to identify complications associated with medical devices in a prospective study of patients who had died in the ICU. Clinical records were reviewed to determine the number and types of medical devices used, and findings from medical and virtual autopsies, related and unrelated to the medical devices, were compared.

Results

Medical and virtual autopsies could be performed in 61 patients (Group M/V), and virtual autopsy only in 101 patients (Group V). In Group M/V, 41 device-related complications and 30 device malpositions were identified, but only with a low inter-method agreement. Major findings unrelated to a device were identified in about 25% of patients with a high level of agreement between methods. In Group V, 8 device complications and 36 device malpositions were identified.

Conclusions

Device-related complications are frequent in ICU patients. Virtual and medical autopsies showed clear differences in the detection of complications and device malpositions. Both methods should supplement each other rather than one alone for quality control of medical devices in the ICU. Further studies should focus on the identification of special patient populations in which virtual autopsy might be of particular benefit.

Clinical trial registration

NCT01541982.  相似文献   
29.
30.

Background:

Employment rates among individuals with spinal cord injury (SCI) are lower than in the general population and little is known about the specific occupations in which they are employed.

Objectives:

To describe specific occupations of adults with pediatric-onset SCI using the 2010 Standard Occupational Classification (SOC) system and to determine associations between SOC occupations and demographic factors.

Methods:

Cross-sectional data specific to education and employment were collected from the last interviews of a larger longitudinal study. Occupations were categorized according to the 2010 SOC system. SOC groups were compared within gender level of injury and final education.

Results:

Of the 461 total participants 219 (47.5%) were employed and specific occupations were available for 179. Among the SOC groups Education Law Community Service Arts and Media Occupations were most prevalent (30.2%) followed by Management Business and Finance Occupations (21.1%) Computer Engineering and Science Occupations (10.6%) Administrative and Office Support Occupations (10.0%) Service Occupations (7.3%) Healthcare Practitioners and Technical Occupations (3.9%) and Production Occupations (3.4%). Differences were found in the distribution of SOC groups between gender levels of injury and final education groups.

Conclusion:

A wide variety of occupations were reported in adults with pediatric-onset SCI generally in concordance with final education and functional ability levels.  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