全文获取类型
收费全文 | 3582篇 |
免费 | 316篇 |
国内免费 | 26篇 |
学科分类
医药卫生 | 3924篇 |
出版年
2021年 | 38篇 |
2020年 | 30篇 |
2019年 | 40篇 |
2018年 | 43篇 |
2017年 | 32篇 |
2016年 | 42篇 |
2015年 | 61篇 |
2014年 | 69篇 |
2013年 | 110篇 |
2012年 | 97篇 |
2011年 | 106篇 |
2010年 | 95篇 |
2009年 | 115篇 |
2008年 | 127篇 |
2007年 | 144篇 |
2006年 | 112篇 |
2005年 | 118篇 |
2004年 | 114篇 |
2003年 | 110篇 |
2002年 | 105篇 |
2001年 | 94篇 |
2000年 | 91篇 |
1999年 | 106篇 |
1998年 | 121篇 |
1997年 | 94篇 |
1996年 | 82篇 |
1995年 | 78篇 |
1994年 | 50篇 |
1993年 | 62篇 |
1992年 | 75篇 |
1991年 | 118篇 |
1990年 | 87篇 |
1989年 | 111篇 |
1988年 | 87篇 |
1987年 | 81篇 |
1986年 | 85篇 |
1985年 | 83篇 |
1984年 | 52篇 |
1983年 | 53篇 |
1982年 | 40篇 |
1981年 | 39篇 |
1980年 | 44篇 |
1979年 | 44篇 |
1978年 | 43篇 |
1977年 | 34篇 |
1976年 | 35篇 |
1975年 | 35篇 |
1973年 | 41篇 |
1972年 | 33篇 |
1970年 | 29篇 |
排序方式: 共有3924条查询结果,搜索用时 15 毫秒
1.
R G Jones J W Bass M E Weisse J M Vincent 《The Pediatric infectious disease journal》1991,10(8):557-559
We tested the urine of 30 infants 6 weeks to 7 months of age after they received standard 10-micrograms (0.5-ml) doses of HbOC (HibTITER) Haemophilus influenzae b (Hib) conjugate vaccine for the presence of Hib antigenuria using a commercially available latex particle agglutination assay (Directigen). Urines were collected within 1 hour, from 1 to 3 hours, at 24 hours and at 3, 6 and 9 days after vaccine administration and reactions were quantitated from 0 to 3+. In contrast to previous studies in older children which showed little or no antigenuria following HbOC vaccination, our study shows that in infants intense Hib antigenuria is evident within 2 to 3 hours and persists 3 days after vaccine administration and that less intense antigenuria may be detected in some infants for several days. With efficacious vaccines now being used in 2- to 6-month-old infants, invasive Hib disease may soon be limited to infants of this age just before their seroconversion. It should be recognized that antigenuria occurs for several days after vaccination with Hib conjugate vaccines and that it could be erroneously interpreted as evidence of invasive Hib infection. 相似文献
2.
Edbert B Hsu Tamara L Thomas Eric B Bass Dianne Whyne Gabor D Kelen Gary B Green 《BMC medical education》2006,6(1):19-9
Background
Although training and education have long been accepted as integral to disaster preparedness, many currently taught practices are neither evidence-based nor standardized. The need for effective evidence-based disaster training of healthcare staff at all levels, including the development of standards and guidelines for training in the multi-disciplinary health response to major events, has been designated by the disaster response community as a high priority. We describe the application of systematic evidence-based consensus building methods to derive educational competencies and objectives in criteria-based preparedness and response relevant to all hospital healthcare workers. 相似文献3.
4.
Elizabeth Bass Robert R Campbell Dennis C Werner Audrey Nelson Tatjana Bulat 《Rehabilitation nursing》2004,29(6):215-220
Hip fractures among elderly people frequently result in permanent disabilities, nursing home placement, and death. The bulk of hip fracture research focuses on elderly women. Within the Veterans Health Administration (VHA), the majority of patients are men. There are no published national reports on hip fractures with large male samples, or on related inpatient mortality among veterans. This retrospective study of 13,546 veterans with hip fracture discharges from 1998-2002 found unadjusted mortality rates are higher in the VHA, compared with the general population. VHA patients tend to be older men in poor health who stay in the hospital longer Increased knowledge about the risks and outcomes associated with hip fractures in men could lead to improved primary and secondary injury-prevention programs. Rehabilitation nurses in acute care can be catalysts in proactively incorporating protective devices, screening for osteoporosis, and initiating lifestyle changes in their plans of care to optimize outcomes for hip fracture patients. 相似文献
5.
Pyomyositis: characteristics at CT and MR imaging 总被引:9,自引:0,他引:9
6.
Andrew R. Hoellein MD Christopher A. Feddock MD Charles H. Griffith III MD MSPH John F. Wilson PhD Donald R. Barnett MD MSPH Pat F. Bass III MD MS T. Shawn Caudill MD MSPH 《Journal of general internal medicine》2004,19(5P2):562-565
Due to recent public debate and newly imposed resident work hour restrictions, we decided to investigate the relationship of resident call status to their ambulatory patients' satisfaction. Resident continuity clinic patients were asked to rate their level of satisfaction on a 10-point Likert-type scale. Using multiple regression approaches, these data were then assessed as a function of resident call status. We found that in 646 patient encounters, patient satisfaction scores were significantly less when the resident was postcall, 8.99 ± 1.8, than when not postcall, 9.31 ± 1.3. We herein discuss etiologies and implications of these findings for both patient care and medical education. 相似文献
7.
C Bass 《The Medical clinics of North America》1991,75(5):1157-1173
Complaints of chest pain and breathlessness are common in both primary care and medical outpatient settings. A subgroup of these patients who find their way into tertiary care settings and subsequently are found to have no relevant organic pathology are at risk of continuing morbidity. One possible reason for this is that diagnostic strategies often focus on establishing an organic cause of pain and ignore psychosocial factors. In this article I have attempted to describe not only the prevalence but also the clinical characteristics of patients with medically unexplained cardiorespiratory symptoms. A method of establishing a positive diagnosis of noncardiac chest pain has also been outlined. This is based on an interactive and overlapping model that takes into account not only a number of psychological and social factors but also current physical and cardiac risk factors. It is important for nonpsychiatric physicians to diagnose noncardiac pain at an earlier stage in the evolution of the disorder. This would have major beneficial effects for patients, including (1) fewer unnecessary investigations; (2) less distress and functional disability; (3) reduced cost to the hospital; and (4) fewer iatrogenic complications. 相似文献
8.
9.
D De AJ Kanwar S Handa 《Journal of the European Academy of Dermatology and Venereology》2006,20(7):853-859
BACKGROUND: Diagnosis of atopic dermatitis (AD) depends on clinical features because no definitive diagnostic test exists. Criteria proposed by Hanifin and Rajka (Acta Derm Venereol (Stockh) 1980; Suppl 92: 44-47) were acceptable for hospital-based studies but were found not to be suitable for field studies. A UK working party formulated clinical diagnostic criteria that could be used in both hospital and epidemiological settings. Validation studies of the criteria showed widely variable results, probably due to different clinical settings and ethnicity. AIM AND OBJECTIVE: This study was undertaken to validate Hanifin and Rajka's criteria and to assess the comparative efficacy of their criteria and the UK working party's diagnostic criteria in the diagnosis of AD in a hospital setting in North India. SUBJECTS AND METHODS: This study serially included 101 patients with AD and 48 controls of paediatric age group. The study period was from July 2003 to December 2004. RESULTS: Hanifin and Rajka's criteria (sensitivity 96%, specificity 93.75%, positive predictive value 97% (PPV) and negative predictive value (NPV) 91.84%) had a statistical advantage over the UK working party's diagnostic criteria (sensitivity 86%, specificity 95.83%, PPV 97.75% and NPV 76.67%), with a P-value < 0.005. 相似文献
10.
Recent evidence suggests that pigmentary dispersion syndrome is a result of the mechanical abrasion of the posterior iris surface and the anterior zonular fibers causing pigmentary release onto the ocular structures. Irreversible glaucomatous changes may be the result of the inability of the endothelial cells lining the trabecular beams to continue to phagocytize the release pigment. Glaucomatous field changes may occur despite low intraocular pressures and no clinically observable cupping. Visual field testing is indicated in any patient presenting with pigmentary dispersion syndrome since pressure spikes inducing nerve damage occur with stress, exercise, or prolonged mydriasis. Treatment may include miotics to prevent further abrasion rather than typical pressure-lowering medication. 相似文献