全文获取类型
收费全文 | 6167篇 |
免费 | 334篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 125篇 |
儿科学 | 350篇 |
妇产科学 | 135篇 |
基础医学 | 616篇 |
口腔科学 | 75篇 |
临床医学 | 356篇 |
内科学 | 1152篇 |
皮肤病学 | 147篇 |
神经病学 | 430篇 |
特种医学 | 181篇 |
外科学 | 963篇 |
综合类 | 296篇 |
预防医学 | 359篇 |
眼科学 | 276篇 |
药学 | 473篇 |
中国医学 | 21篇 |
肿瘤学 | 554篇 |
出版年
2022年 | 81篇 |
2021年 | 146篇 |
2020年 | 91篇 |
2019年 | 118篇 |
2018年 | 142篇 |
2017年 | 96篇 |
2016年 | 145篇 |
2015年 | 122篇 |
2014年 | 207篇 |
2013年 | 267篇 |
2012年 | 359篇 |
2011年 | 431篇 |
2010年 | 259篇 |
2009年 | 225篇 |
2008年 | 317篇 |
2007年 | 366篇 |
2006年 | 350篇 |
2005年 | 280篇 |
2004年 | 276篇 |
2003年 | 244篇 |
2002年 | 184篇 |
2001年 | 152篇 |
2000年 | 166篇 |
1999年 | 142篇 |
1998年 | 52篇 |
1997年 | 46篇 |
1996年 | 54篇 |
1995年 | 38篇 |
1993年 | 30篇 |
1992年 | 66篇 |
1991年 | 51篇 |
1990年 | 49篇 |
1989年 | 56篇 |
1988年 | 50篇 |
1987年 | 64篇 |
1986年 | 53篇 |
1985年 | 60篇 |
1984年 | 54篇 |
1983年 | 36篇 |
1979年 | 27篇 |
1978年 | 29篇 |
1977年 | 30篇 |
1974年 | 35篇 |
1973年 | 49篇 |
1972年 | 42篇 |
1971年 | 39篇 |
1970年 | 31篇 |
1969年 | 36篇 |
1968年 | 36篇 |
1967年 | 26篇 |
排序方式: 共有6509条查询结果,搜索用时 0 毫秒
1.
2.
3.
Electroencephalographic and imaging profile in a subacute sclerosing panencephalitis (SSPE) cohort: a correlative study. 总被引:1,自引:0,他引:1
S Praveen-kumar S Sinha A B Taly S Jayasree V Ravi J Vijayan S Ravishankar 《Clinical neurophysiology》2007,118(9):1947-1954
OBJECTIVE: There are only a few studies correlating diverse radiological and EEG features of subacute sclerosing panencephalitis (SSPE). The objective of the study was to (a) describe EEG profile and (b) correlate it with the clinical and imaging data of patients with confirmed SSPE. METHODS: This study was conducted at a University teaching hospital in south India and involved 58 patients (M:F=37:21, age: 12.3, SD 4.8 years) of SSPE. Diagnosis of SSPE was based on the characteristic clinical manifestations, and raised IgG (1:625) anti-measles antibody in cerebrospinal fluid (CSF) by ELISA in all the patients. Scalp EEGs were recorded on 16 channel machines using standard parameters and procedures. The EEG, clinical and imaging data were reviewed. RESULTS: EEGs were frequently abnormal: typical (37) and atypical (21). Diffuse slowing of background activity (BGA) was noted in 46 records being asymmetrical in six. Periodic complexes were periodic (32), quasi-periodic (21) or a-periodic (4). Periodic complexes (PC) (amplitude: 370.7, SD 171.2 microV; duration - 1.7, SD 2.0 s; inter-complex interval: 8.4, SD 9.2s) were symmetrical in 39 and asymmetrical in 19. CT (32) and MRI (23) scans were normal in 16 patients while others had white matter (15), cerebral edema (8), cerebral atrophy (8), basal ganglia (2), and thalamic (2) changes. There was an independent association of frontally dominant slowing of BGA (p=0.04) and typical PCs (p=0.03) with the diffuse cerebral edema on imaging. White matter changes correlated with slowing of BGA (p=0.04), but not with typical PC (p=0.16). CONCLUSIONS: This study provides valuable insight into the structural and clinical correlates of EEG changes in SSPE. SIGNIFICANCE: Irrespective of the incidence of occurrence of SSPE in a community, a clinician should be aware of the wide spectra of EEG findings. This study also discusses the possible underlying structural and clinical correlates. 相似文献
4.
Three cases of enteritis necroticans seen at Port Moresby General Hospital are described. All three cases proved diagnostic problems and in all three the diagnosis was made only at laparotomy. While the condition is uncommon in Port Moresby, these cases indicate that it must now be considered earlier rather than later. 相似文献
5.
6.
Samir Kumar Praharaj mbbs md dpm Nishant Goyal mbbs md dpm Sukanto Sarkar mbbs md dpm Dhruv Bagati mbbs Prakriti Sinha mp hil Vinod Kumar Sinha mbbs md dpm 《Psychiatry and clinical neurosciences》2009,63(2):230-234
Reported herein is a case of obsessive–compulsive disorder with persistent and distressing musical obsessions along with other symptoms. Advanced source analysis of electroencephalographic data indicated high spectral power over the bifrontal region. The musical symptoms were resistant to pharmacotherapy but there was some reduction in frequency and duration of musical obsessions with thought-stopping technique. 相似文献
7.
B. S. Sharma Sumit Sinha V. S. Mehta A. Suri Aditya Gupta A. K. Mahapatra 《Child's nervous system》2007,23(3):327-333
Object Intracranial aneurysms are rare in children and have different epidemiological, clinical, and morphological characteristics
and outcome from those in adults.
Materials and methods We analyzed demographic, clinical, radiologic features, treatment, and outcome in 55 patients <18 years of age, treated from
Jan 1995 through December 2005.
Results Intracranial aneurysms in children below 18 years constituted 4% of all intracranial aneurysms. Internal Carotid artery (ICA)
bifurcation was the commonest location. About half of the aneurysms were complex. Three-fourth of the patients required surgical
treatment. Two patients died, constituting 5% mortality. Two patients (5%) had poor outcome, whereas the majority (90%) had
a favorable outcome.
Conclusions Pediatric aneurysms have male predominance, higher incidence of clinical features of mass effect or seizures, high incidence
of large, traumatic/mycotic aneurysms, associated illnesses and ICH/IVH and hydrocephalus, better Hunt and Hess grades at
presentation, ICA bifurcation as the commonest site, and better outcome than their adult counterparts. 相似文献
8.
R. N. Sinha A. W. Patrick L. Richardson M. Wallymahmed I. A. MacFarlane 《Postgraduate medical journal》1997,73(859):293-294
One hundred insulin-dependent diabetic patients (age < 45 years, 53 smokers) were followed for six years. The age, duration of diabetes and mean glycated haemoglobin levels, were comparable between the smokers and non-smokers. Microvascular complications (retinopathy and increased urine albumin excretion) were commoner and more severe in the smoking group at six years, particularly in heavy smokers. Of the 45 original smokers reviewed at six years, 12 (27%) had stopped, six of whom had developed microvascular complications. Only two of the ''heavy'' initial smokers, likely to be at most risk, had stopped smoking, and three original non-smokers had started smoking. 相似文献
9.
10.
M. Barua R. Sinha A. Majumdar 《Indian journal of otolaryngology and head and neck surgery》1993,45(2):87-90
Between 1986–1990, 290 patients with squamouscell carcinoma of the hypopharynx were assessed at the S. S. K. M. Hospital Calcutta,
out of the total of 1460 number of Head Neck cancer, (19.8%). The most frequent initial symptom was a foreign body sensation
in the throat (70%), and males were affected more than females (9.8 : 1.2). The peak age incidence was found between 40 and
50 years (24%). Most of the patients came in advanced stages with cervical lymph node metastases (60%).
One interesting fact that came out from the present study is the Right pyriform fassa was more commonly affected than the
left in righthanded persons (56.9%). Though the reason is not clear it could be due to right — sided swallow, as one side
may be predominant in funtion. 相似文献