首页 | 官方网站   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   1003篇
  免费   121篇
  国内免费   8篇
医药卫生   1132篇
  2023年   5篇
  2022年   2篇
  2021年   8篇
  2020年   7篇
  2019年   13篇
  2018年   28篇
  2017年   13篇
  2016年   23篇
  2015年   25篇
  2014年   30篇
  2013年   56篇
  2012年   32篇
  2011年   30篇
  2010年   48篇
  2009年   48篇
  2008年   32篇
  2007年   44篇
  2006年   31篇
  2005年   36篇
  2004年   31篇
  2003年   30篇
  2002年   28篇
  2001年   15篇
  2000年   20篇
  1999年   20篇
  1998年   41篇
  1997年   43篇
  1996年   42篇
  1995年   38篇
  1994年   23篇
  1993年   32篇
  1992年   24篇
  1991年   20篇
  1990年   15篇
  1989年   27篇
  1988年   25篇
  1987年   15篇
  1986年   23篇
  1985年   20篇
  1984年   12篇
  1983年   13篇
  1982年   5篇
  1981年   13篇
  1980年   7篇
  1979年   6篇
  1978年   4篇
  1977年   8篇
  1976年   10篇
  1975年   2篇
  1935年   2篇
排序方式: 共有1132条查询结果,搜索用时 31 毫秒
91.
92.
In Europe, smoking during and after pregnancy is still highly prevalent among socioeconomically disadvantaged women. Nurses caring for these women can play a key role in smoking cessation, but encounter many problems when providing support. This research aims to identify barriers in providing smoking cessation support, experienced by nurses working within a Dutch preventive care programme for disadvantaged young women (VoorZorg), and to understand the underlying reasons of these barriers. Sixteen semi‐structured interviews with nurses were performed. All interviews were recorded, transcribed and analysed deductively and inductively. We found that the VoorZorg programme provided nurses with training, resources and time to deliver smoking cessation support. Yet, nurses experienced important barriers, such as unmotivated clients and support methods that do not fit clients’ needs. Underlying reasons are competing care demands, unsatisfactory training for cessation support, lack of self‐efficacy in attending their clients, and conflicts with own professional attitudes. The results emphasise that nurses’ ability to provide smoking cessation support could be improved by proper training in interventions that fit their clients’ needs, and by time schedules and task definitions that help them to prioritise smoking cessation support over other matters.  相似文献   
93.
94.

Purpose

The aim of this work was to develop a CAIX-specific nanobody conjugated to IRDye800CW for molecular imaging of pre-invasive breast cancer.

Procedures

CAIX-specific nanobodies were selected using a modified phage display technology, conjugated site-specifically to IRDye800CW and evaluated in a xenograft breast cancer mouse model using ductal carcinoma in situ cells (DCIS).

Results

Specific anti-CAIX nanobodies were obtained. Administration of a CAIX-specific nanobody into mice with DCIS xenografts overexpressing CAIX showed after 2 h a mean tumor-to-normal tissue ratio (TNR) of 4.3?±?0.6, compared to a TNR of 1.4?±?0.2 in mice injected with the negative control nanobody R2-IR. In DCIS mice, a TNR of 1.8?±?0.1 was obtained. Biodistribution studies demonstrated an uptake of 14.0?±?1.1 %I.D./g in DCIS?+?CAIX tumors, 4.6?±?0.8 %I.D./g in DCIS tumors, while 2.0?±?0.2 %I.D./g was obtained with R2-IR.

Conclusions

These results demonstrate the successful generation of a CAIX-specific nanobody-IRDye800CW conjugate that can be used for rapid imaging of (pre-)invasive breast cancer.
  相似文献   
95.
96.
97.
98.
We report the case of a 67 year-old patient who presented with worsening chest pain and shortness of breath, four days post acute myocardial infarction. Contrast enhanced computed tomography of the chest ruled out a pulmonary embolus but revealed an unexpected small subepicardial aneurysm (SEA) in the lateral left ventricular wall which was confirmed on cardiac magnetic resonance imaging. Intraoperative palpation of the left lateral wall was guided by the cardiac MRI and CT findings and confirmed the presence of focally thinned and weakened myocardium, covered by epicardial fat. An aneurysmorrhaphy was subsequently performed in addition to coronary bypass surgery and a mitral valve repair. The patient was discharged home on post operative day eight in good condition and is feeling well 2 years after surgery.  相似文献   
99.

Introduction

At present there are no reliable non-traumatic and non-invasive methods to analyse the healing process and loosening status after total hip replacement. Therefore early as well as late loosening of prosthesis and interface component problems are difficult to be found or diagnosed at any time.

Methods

In a cadaver study the potential application of Resonance Frequency Monitoring (RFM) will be evaluated as a non-invasive and non-traumatic method to monitor loosening and interface problems in hip replacement. In a 65 year old female cadaver different stability scenarios for a total hip replacement (shaft, head/modular head and cup, ESKA, Luebeck, Germany) are simulated in cemented and cement less prosthesis and then analysed with RFM. The types of stability vary from secure/press-fit to interface-shaft disruption.

Results

The RFM shows in cemented as well as cement less prosthesis significant intra-individual differences in the spectral measurements with a high dynamic (20 dB difference corresponding to the factor 100 (10000%)), regarding the simulated status of stability in the prosthesis system.

Conclusion

The results of the study demonstrate RFM as a highly sensitive non-invasive and non-traumatic method to support the application of RFM as a hip prosthesis monitoring procedure. The data obtained shows the possibility to use RFM for osteointegration surveillance and early detection of interface problems, but will require further evaluation in clinical and experimental studies.  相似文献   
100.
OBJECTIVE: To estimate the prevalence of neuropsychiatric symptoms of dementia patients in Dutch nursing homes. METHODS: Cross-sectional study in a large sample of 1322 demented patients living in 59 dementia special care units (SCUs) in The Netherlands. Symptoms were observed by licensed vocational nurses during regular care-giving in a 2-week observational period prior to assessment. Neuropsychiatric symptoms were assessed using the Neuropsychiatric Inventory- Nursing home version (NPI-NH; frequency X severity score >/= 4) and the Cohen-Mansfield Agitation Inventory (CMAI; symptoms occurring at least once a week). RESULTS: More than 80% of these patients suffered from at least one clinically significant symptom, as defined with the NPI-NH frequency X severity score >/= 4. Measured with the NPH-NH agitation/aggression, apathy and irritability were the most frequently observed behaviors, with prevalences of 30-35%. Using the CMAI, 85% of the patients showed at least one symptom of agitation, of which general restlessness was observed most frequently (44%). Other frequently observed symptoms with prevalence rates of 30% were cursing or verbal aggression, constant request for attention, negativism, repetitious sentences, mannerisms, pacing, and complaining. Physically aggressive symptoms such as hitting, kicking, biting occurred less often (less than 13%). CONCLUSIONS: Prevalence rates of neuropsychiatric symptoms in Dutch nursing home patients with dementia residing in SCUs are high, especially agitation and apathy. Insight into the prevalence rates of individual symptoms in patients with dementia has important practical consequences for the accurate planning of staff allotment and stresses the need for patient oriented care.  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-23

京公网安备 11010802026262号