全文获取类型
收费全文 | 457篇 |
免费 | 33篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 18篇 |
妇产科学 | 16篇 |
基础医学 | 58篇 |
口腔科学 | 18篇 |
临床医学 | 24篇 |
内科学 | 78篇 |
皮肤病学 | 30篇 |
神经病学 | 46篇 |
特种医学 | 8篇 |
外科学 | 114篇 |
综合类 | 2篇 |
预防医学 | 35篇 |
眼科学 | 4篇 |
药学 | 24篇 |
中国医学 | 1篇 |
肿瘤学 | 11篇 |
出版年
2023年 | 10篇 |
2022年 | 11篇 |
2021年 | 12篇 |
2020年 | 15篇 |
2019年 | 15篇 |
2018年 | 12篇 |
2017年 | 10篇 |
2016年 | 10篇 |
2015年 | 12篇 |
2014年 | 11篇 |
2013年 | 21篇 |
2012年 | 24篇 |
2011年 | 26篇 |
2010年 | 13篇 |
2009年 | 19篇 |
2008年 | 16篇 |
2007年 | 12篇 |
2006年 | 18篇 |
2005年 | 11篇 |
2004年 | 10篇 |
2003年 | 6篇 |
2002年 | 3篇 |
2001年 | 4篇 |
2000年 | 14篇 |
1999年 | 15篇 |
1998年 | 5篇 |
1997年 | 3篇 |
1996年 | 5篇 |
1995年 | 8篇 |
1994年 | 5篇 |
1993年 | 6篇 |
1992年 | 15篇 |
1991年 | 13篇 |
1990年 | 11篇 |
1989年 | 15篇 |
1988年 | 7篇 |
1987年 | 5篇 |
1986年 | 3篇 |
1985年 | 3篇 |
1983年 | 3篇 |
1979年 | 4篇 |
1978年 | 3篇 |
1975年 | 7篇 |
1974年 | 2篇 |
1973年 | 3篇 |
1972年 | 3篇 |
1971年 | 5篇 |
1969年 | 4篇 |
1968年 | 7篇 |
1965年 | 2篇 |
排序方式: 共有490条查询结果,搜索用时 15 毫秒
1.
Dermoid cysts of the posterior cranial fossa in children. Report of nine cases and review of the literature 总被引:1,自引:0,他引:1
Dermoids of the posterior cranial fossa in children are rare. We report the clinical and pathological data on nine children with these lesions. A mean follow-up of 17.3 years after total removal confirms the excellent prognosis irrespective of whether the presenting symptom is meningitis or intracranial hypertension. A brief review of 39 published cases follows. 相似文献
2.
Three patients aged 5 1/2 to 9 years old with mutism after posterior fossa surgery are presented. The entity is discussed with a review of 15 additional previously reported cases in children aged 2 to 11 years. In all 18 patients, a large midline tumor of the posterior fossa (medulloblastoma in nine cases, astrocytoma in five, and ependymoma in four), often attached to one or both lateral recesses of the fourth ventricle, was removed. Mutism developed 18 to 72 hours after the operation (mean 41.5 hours) in patients with no disturbance of consciousness and no deficits of the lower cranial nerves or of the organs of phonation. All of these children had spoken in the first hours after surgery. The disorder lasted from 3 to 16 weeks (mean 7.9 weeks). Speech was regained after a period of dysarthria in six of the 10 cases for whom this information was available. The various hypotheses advanced to explain the pathogenesis of this speech disorder are analyzed. 相似文献
3.
Ana María Fortuna Marco Balleza Núria Calaf Mercedes González Teresa Feixas Pere Casan 《Archivos de bronconeumologia》2009,45(3):143-147
Nitric oxide (NO) production has been described using a 2-compartment model for the synthesis and movement of NO in both the alveoli and the airways. The alveolar concentration of NO (CaNO), an indirect marker of the inflammatory state of the distal portions of the lung, can be deduced through exhalation at multiple flow rates. Our objective was to determine reference values for CaNO. The fraction of exhaled NO (FeNO) was measured in 33 healthy individuals at a rate of 50 mL/s; the subjects then exhaled at 10, 30, 100, and 200 mL/s to calculate CaNO. A chemiluminescence analyzer (NIOX Aerocrine) was used to perform the measurements. The mean (SD) FeNO was 15 (6) ppb. The mean CaNO was 3.04 (1.30) ppb. These values of CaNO measured in healthy individuals will allow us to analyze alveolar inflammatory behavior in respiratory and systemic processes. 相似文献
4.
5.
6.
Paolo Lunardi Michele Acqui Luigi Ferrante Luciano Mastronardi Aldo Fortuna 《Neurosurgical review》1993,16(3):189-196
Between 1953 and 1989 eighty cases of non-traumatic brain abscess were treated in our department. We have re-examined the clinical and neuroradiological features of this pathological process and present our therapeutic approach and results. We believe that the optimal treatment for brain abscess consists of surgical removal.The prognosis for these lesions has undergone a marked improvement over the last two decades in response to neuroradiological, microbiological and surgical advances. The most influential prognostic factor seems to be preoperative clinical status. 相似文献
7.
This article describes the acute and long-term clinical outcomes of 310 consecutive patients who underwent directional coronary atherectomy (DCA) for treatment of coronary artery disease. An overall procedural success rate of 95% was noted with a total major complication rate of 5%. Analyses of minimal luminal diameter (MLD) were performed pre- and post-procedure for 160 patients. Clinical follow-up including treadmill testing and/or clinical symptoms was obtained on 293 patients. Results of angiographic analyses corresponded with the Kuntz model suggesting that larger MLDs are associated with lower restenosis rates. The overall target vessel revascularization rate was 27.6%, with a mean post-procedure percent diameter stenosis of 16%. These results indicate that DCA is associated with acceptable clinical restenosis rates, complications and long-term outcome. 相似文献
8.
Luigi Cervoni Paolo Celli Roberto Tarantino Aldo Fortuna 《Journal of neuro-oncology》1995,23(1):63-66
Summary We report a case of association of a brain tumor with multiple colorectal polyposis and offer an analysis of the relevant literature with a view to revising the classification of the syndrome in relation to familial multiple polyposis and Gardner's syndrome. Differences emerged, depending on the brain tumor type, which suggests that this association may be classified as two distinct syndromes. 相似文献
9.
Giacometti A Cerioni O Fortuna M Caselli F D'Errico MM Drenaggi D Scalise G 《Le infezioni in medicina : rivista periodica di eziologia, epidemiologia, diagnostica, clinica e terapia delle patologie infettive》1999,7(3):163-167
In this study, the prevalence of Toxocara spp. was evaluated in the soil of 22 public playgrounds of Ancona (Italy). The public playgrounds were selected according to the different areal distribution (centre, low-lying areas centre, hilly areas suburbs) within the urban area of Ancona, central Italy. In six playgrounds there were signs restricting access for dogs; all of them were frequented by children. Parasites were found in the soil samples from 21 out of 22 playgrounds (95.5%). The most prevalent helminth found was Toxocara canis, the common roundworm of dogs. It was detected in the soil samples from 12 (54.5%) playgrounds. This study showed a low frequency of the other parasites. Our data highlight the need for improved knowledge of the relationship between humans and stray animals. Indeed several zooparasites have a role in the etiopathogenesis of common human diseases. The high environmental contamination frequency found underlines the necessity of prompt preventive public health measures, such as control of stray animals, treatment of infected pets and hygiene education of the population to increase awareness of potential zoonotic hazards. 相似文献
10.
Spinal neurinomas and meningiomas in children 总被引:3,自引:0,他引:3
Summary The literature on spinal neurinomas (N) and meningiomas (M) in children is reviewed, and five personal cases of N are added (one in the context of Recklinghausen's disease). The cases of N totalled 151, and of M 69, accounting respectively for 10.9% and 4.3% of childhood spinal tumours and 2.6% and 1.3% of spinal N and M of all ages. Sixty-one cases of N (16 in the context of Recklinghausen's disease) and 26 cases of M (5 in the context of Recklinghausen's disease) are analyzed in detail. N occurs chiefly between ages 9 and 15 years, the sex ratio is 3 2, all levels of the spinal canal are equally affected, and extradural N or conditions with an extradural component (48%) are more frequent than in adults (26.9%). M occurs chiefly between 12 and 15 years, the sex ratio is 3 2, the prevalence of the thoracic segment (47.8%) is less marked than in adults (81%), and the frequency of the extradural site (10.6%) is close to the sum of the extradural and dumb-bell lesions in adults (11.1%). In children vertebral signs,i.e., spinal rigidity and tenderness, and spasm of paravertebral muscles, are more intense, earlier, and more frequent than in adults, and the clinical history is shorter. The chances of recovery from neurological deficits are greater, as are those of malignant degeneration. 相似文献