全文获取类型
收费全文 | 216篇 |
免费 | 15篇 |
专业分类
儿科学 | 9篇 |
妇产科学 | 7篇 |
基础医学 | 30篇 |
临床医学 | 14篇 |
内科学 | 44篇 |
皮肤病学 | 3篇 |
神经病学 | 23篇 |
特种医学 | 1篇 |
外科学 | 51篇 |
一般理论 | 1篇 |
预防医学 | 35篇 |
眼科学 | 1篇 |
药学 | 7篇 |
肿瘤学 | 5篇 |
出版年
2024年 | 1篇 |
2023年 | 3篇 |
2022年 | 2篇 |
2021年 | 9篇 |
2020年 | 3篇 |
2019年 | 6篇 |
2018年 | 8篇 |
2017年 | 11篇 |
2016年 | 13篇 |
2015年 | 4篇 |
2014年 | 8篇 |
2013年 | 12篇 |
2012年 | 32篇 |
2011年 | 32篇 |
2010年 | 11篇 |
2009年 | 7篇 |
2008年 | 19篇 |
2007年 | 12篇 |
2006年 | 10篇 |
2005年 | 9篇 |
2004年 | 6篇 |
2003年 | 2篇 |
2002年 | 5篇 |
2001年 | 1篇 |
1995年 | 1篇 |
1992年 | 1篇 |
1989年 | 2篇 |
1988年 | 1篇 |
排序方式: 共有231条查询结果,搜索用时 227 毫秒
11.
Sijstermans K Hack WW Bos SD van der Horst HJ 《Nederlands tijdschrift voor geneeskunde》2005,149(50):2765-2769
Three boys aged 8, 5, 3 and 9 years, respectively, appeared to have urethral meatal stenosis. In the first patient this appeared during a check-up following treatment for balanitis. Patient history revealed that his micturition duration was longer than before. In the second patient, who underwent surgical correction for hypospadia, it was discovered because he took longer to urinate than his brother. In the third patient stenosis was observed during an appointment for a retracted testicle; he had been circumcised earlier for cultural reasons. Meatomy was performed under anaesthesia in all 3 patients, after which the micturition duration and stream velocity were normal. The third patient continued to have an extremely large bladder capacity and residual volume. Meatal stenosis may lead to obstructive uropathy, urinary tract infection and eventually damage to renal parenchyma. Symptomatic presentation can be late. Diagnostic tests include urine analysis and culture, and uroflowmetry. Visual inspection by spreading the meatal dimple to visualise a pinhole urethra cannot be overemphasised. 相似文献
12.
Driessen EW van Tartwijk J Overeem K Vermunt JD van der Vleuten CP 《Medical education》2005,39(12):1230-1235
Aim Portfolios are often used as an instrument with which to stimulate students to reflect on their experiences. Research has shown that working with portfolios does not automatically stimulate reflection. In this study we addressed the question: What are the conditions for successful reflective use of portfolios in undergraduate medical education? Methodology/research design We designed a portfolio that was aimed at stimulating reflection in early undergraduate medical education, using experiences described in the medical education literature and elsewhere. Conditions for reflective portfolio use were identified through interviews with 13 teachers (mentors), who were experienced in mentoring students in the process of developing their portfolios. The interviews were analysed according to the principles of grounded theory. Results The conditions for successful reflective use of portfolios that emerged from the interviews fell into 4 categories: coaching; portfolio structure and guidelines; relevant experiences and materials, and summative assessment. According to the mentors, working with a portfolio designed to meet these conditions will stimulate students' reflective abilities. Conclusion This study shows that portfolios are a potentially valuable method of assessing and developing students' reflective skills in undergraduate medical training, provided certain conditions for effective portfolios are recognised and met. Portfolios have a strong potential for enhancing learning and assessment but they are very vulnerable and may easily lead to disappointment. Before implementing portfolios in education, one should first consider whether the necessary conditions can be fulfilled, including an appropriate portfolio structure, an appropriate assessment procedure, the provision of enough new experiences and materials, and sufficient teacher capacity for adequate coaching and assessment. 相似文献
13.
14.
15.
van Stralen KJ Wanner C Jager KJ 《The New England journal of medicine》2011,365(25):2436-7; author reply 2437-8
16.
17.
Older living kidney donors: surgical outcome and quality of life 总被引:1,自引:0,他引:1
Minnee RC Bemelman WA Polle SW van Koperen PJ Ter Meulen S Donselaar-van der Pant KA Bemelman FJ Idu MM 《Transplantation》2008,86(2):251-256
BACKGROUND: Older living kidney donors remain controversial because of their physiological decline in glomerular filtration rate and their increased susceptibility of surgical complications. Little is known about the quality of life (QOL) of this elderly group. The purpose of this study is to examine surgical outcome and the QOL in older living donors. PATIENTS AND METHODS: All 105 consecutive living donors who underwent a laparoscopic donor nephrectomy between June 2002 and February 2006 were prospectively included in the study. Intra- and postoperative complications were measured. Quality of life was recorded preoperatively and at several endpoints postoperatively. Older donors were defined as 55 years and older. RESULTS: There were no significant differences in intra- and postoperative complication rates and 1-year graft survival rate between both groups. Elderly donors (n=34) had both a significant lower postoperative pain at rest at day 1 compared with the younger group (P=0.019) and a lower total pain score in the analysis for the whole follow-up period (P=0.002). Although small solitary significant differences in Short Form-36 Health Survey, Multidimensional Fatigue Inventory-20 and visual analogue scale measuring pain, between both groups were detected, in general QOL of older donors was not different than of younger donors. CONCLUSION: Although small solitary significant differences exist with respect to pain, social functioning and mental health older donors, in general, have similar surgical outcome and quality of life when compared with younger donors. There is no need to exclude older donors in screening programs for transplantation. 相似文献
18.
Overeem K Faber MJ Arah OA Elwyn G Lombarts KM Wollersheim HC Grol RP 《Medical education》2007,41(11):1039-1049
CONTEXT: Continuous assessment of individual performance of doctors is crucial for life-long learning and quality of care. Policy-makers and health educators should have good insights into the strengths and weaknesses of the methods available. The aim of this study was to systematically evaluate the feasibility of methods, the psychometric properties of instruments that are especially important for summative assessments, and the effectiveness of methods serving formative assessments used in routine practise to assess the performance of individual doctors. METHODS: We searched the MEDLINE (1966-January 2006), PsychINFO (1972-January 2006), CINAHL (1982-January 2006), EMBASE (1980-January 2006) and Cochrane (1966-2006) databases for English language articles, and supplemented this with a hand-search of reference lists of relevant studies and bibliographies of review articles. Studies that aimed to assess the performance of individual doctors in routine practise were included. Two reviewers independently abstracted data regarding study design, setting and findings related to reliability, validity, feasibility and effectiveness using a standard data abstraction form. RESULTS: A total of 64 articles met our inclusion criteria. We observed 6 different methods of evaluating performance: simulated patients; video observation; direct observation; peer assessment; audit of medical records, and portfolio or appraisal. Peer assessment is the most feasible method in terms of costs and time. Little psychometric assessment of the instruments has been undertaken so far. Effectiveness of formative assessments is poorly studied. All systems but 2 rely on a single method to assess performance. DISCUSSION: There is substantial potential to assess performance of doctors in routine practise. The longterm impact and effectiveness of formative performance assessments on education and quality of care remains hardly known. Future research designs need to pay special attention to unmasking effectiveness in terms of performance improvement. 相似文献
19.
Liu WM Nahar TE Jacobi RH Gijzen K van Beek J Hak E Jonges M Boog CJ van der Zeijst BA Soethout EC 《Vaccine》2012,30(9):1659-1666
Seasonal influenza causes more morbidity and mortality in older adults than in young adults, apparently because of a decline in immune function with increasing age, known as immunosenescence. In this study, we compared the capacity of dendritic cells (DCs) from healthy older adults (≥65 years) with DCs from healthy young adults (20-40 years) to initiate a T cell response against influenza. DCs from older adults were impaired in the induction of influenza-specific CD8+ T cells as compared to DCs from young adults, which was demonstrated by a decreased proliferation, an impaired production of IFN-γ and a reduced expression of the degranulation marker CD107a by CD8+ T cells. Importantly, DCs from older adults produced significantly less TNF-α, showed a decreased expression of HLA class I and had a lower maturation state after influenza virus infection. Supplementing TNF-α increased the expression of HLA class I and of maturation markers and enhanced the induction of the influenza-specific CD8+ T cell response. Together, these findings indicate that the impaired influenza-specific CD8+ T cell response in older adults is associated with a reduced production of TNF-α and with a lower DC maturation. We suggest that the production of TNF-α is a determining factor in the DC-mediated CD8+ T cell response against influenza. 相似文献
20.