全文获取类型
收费全文 | 3375048篇 |
免费 | 268336篇 |
国内免费 | 6050篇 |
专业分类
耳鼻咽喉 | 48546篇 |
儿科学 | 107667篇 |
妇产科学 | 93095篇 |
基础医学 | 475261篇 |
口腔科学 | 99540篇 |
临床医学 | 306809篇 |
内科学 | 653416篇 |
皮肤病学 | 70446篇 |
神经病学 | 280901篇 |
特种医学 | 134354篇 |
外国民族医学 | 1247篇 |
外科学 | 507200篇 |
综合类 | 82946篇 |
现状与发展 | 4篇 |
一般理论 | 1427篇 |
预防医学 | 272352篇 |
眼科学 | 79806篇 |
药学 | 252498篇 |
7篇 | |
中国医学 | 6249篇 |
肿瘤学 | 175663篇 |
出版年
2018年 | 33642篇 |
2016年 | 28925篇 |
2015年 | 33069篇 |
2014年 | 46943篇 |
2013年 | 71815篇 |
2012年 | 96507篇 |
2011年 | 102078篇 |
2010年 | 60317篇 |
2009年 | 57571篇 |
2008年 | 97208篇 |
2007年 | 102977篇 |
2006年 | 104118篇 |
2005年 | 101233篇 |
2004年 | 98247篇 |
2003年 | 94595篇 |
2002年 | 93381篇 |
2001年 | 153560篇 |
2000年 | 159023篇 |
1999年 | 135027篇 |
1998年 | 39172篇 |
1997年 | 35514篇 |
1996年 | 35007篇 |
1995年 | 33954篇 |
1994年 | 31940篇 |
1993年 | 29871篇 |
1992年 | 109722篇 |
1991年 | 106087篇 |
1990年 | 102995篇 |
1989年 | 99510篇 |
1988年 | 92489篇 |
1987年 | 91247篇 |
1986年 | 86657篇 |
1985年 | 83084篇 |
1984年 | 63024篇 |
1983年 | 54102篇 |
1982年 | 32674篇 |
1981年 | 29190篇 |
1980年 | 27501篇 |
1979年 | 59858篇 |
1978年 | 42106篇 |
1977年 | 35536篇 |
1976年 | 33327篇 |
1975年 | 35284篇 |
1974年 | 43501篇 |
1973年 | 41552篇 |
1972年 | 38726篇 |
1971年 | 36040篇 |
1970年 | 33661篇 |
1969年 | 31436篇 |
1968年 | 28668篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Abstract Guillain-Barré syndrome (GBS) is a disease of the peripheral nervous system, which is caused by aberrant immune responses
directed against some components of peripheral nerves. GBS is rarely accompanied by cardiovascular involvement. We describe
a case of acute neuropathy complicated by sudden heart failure and left ventricular dysfunction which had a presumably neurogenic
origin. Pathogenesis of acute heart failure is probably due to transitorial stunned myocardium and neurogenic cardiac injury.
We show a rare case of transitorial and acute cardiac dysfunction by echocardiography and laboratory markers of heart failure. 相似文献
82.
83.
84.
85.
R Srikanth D Mukunda Reddy A Mosahebi 《Journal of plastic, reconstructive & aesthetic surgery》2006,59(12):1318-1324
The numbers of free flap donor site as well as their indications are constantly increasing. Despite increasing popularity of microvascular reconstructive procedures, literature lacks clear and objective outcome criteria. This paper reports on a simple outcome classification that has become a routine part of the unit's large workload of microvascular outcome recording. The classification was formed through a retrospective analysis of 241 consecutive cases from 2000 to 2001 and is a five graded numerical classification. Grade 1 equates to total success without co-morbidity and grade 5 to a major complication such as amputation, etc., whatever the status of the flap itself. From 2002 to 2005 the classification was prospectively used on 527 consecutive cases with ease of integration into routine clinical practice. The Classification would enable a more objective record keeping thus analysis of the outcome. It would allow a more realistic comparison of different techniques or donor types as well set a benchmarking level for further improvement of the results. 相似文献
86.
87.
Effects of poor glucose handling on arterial stiffness and left ventricular mass in normal children.
AIM: Cardiovascular risk factors can be present in children and young adults. We previously found abnormal microvascular function in children who had glucose intolerance and insulin resistance. The aim of the present study was to investigate whether they also have abnormalities in left ventricular mass (LVM) and arterial stiffness. METHODS: We measured heart dimensions and LVM using echocardiography, and arterial stiffness using pulse wave analysis in 23 children with good glucose handling (postfeeding glucose: 3.9 to 5 mmol/L) and 21 with poor glucose handling (7.7 to 11.4 mmol/L). RESULTS: The time to pulse reflection was slightly shorter in the poorer glucose handlers (mean+/-SD: 143+/-10 vs 153+/-20 ms, P=0.04), suggestive of increased arterial stiffness. Also in this group, there were significant relationships between intraventricular septal thickness, blood pressure and body mass index, but not in the normal glucose handlers. CONCLUSIONS: We have found that normal children who are in the lowest quintile of glucose tolerance in comparison with their peers are exhibiting the first signs of arterial stiffening. In addition, we have seen the beginnings of a relationship between blood pressure, body mass index and left ventricular enlargement in this group. While these changes may not yet be clinically significant, their emergence might be further evidence of early predisposition to cardiovascular disease. 相似文献
88.
Holl P. Gortzalez R. Ksa M. Horvth A. 《世界核心医学期刊文摘》2006,2(3):14-15
背景:浴光疗同步治疗银屑病的有效性与UVB和死海盐的多靶点作用有关,同步治疗能够起到协同功效。目的:本回顾性研究的目的:①评价浴光疗同步治疗各种临床类型银屑病的有效性;②观察治疗反应有无不同;③获得更多数据以预测对不同类型银屑病的治疗效果,以便针对患者的类型选择治疗效果良好的方法。方法:根据Regensburg计划,患者接受了一个包括35次治疗的基础同步浴光疗疗程,随后又接受了一个包括25次治疗的维持治疗疗程。治疗中每周进行PASI评分以评价患者的皮肤状态。对373例按计划完成基础疗程的患者和其中78例完成维持疗程的患者的治疗… 相似文献
89.
R C Pattinson L C Snyman A P Macdonald 《Suid-Afrikaanse tydskrif vir geneeskunde》2006,96(11):1191-1194
AIM: To evaluate whether the introduction of a strict protocol approach based on the systemic evaluation of critically ill pregnant women with complications of abortion affected outcome. SETTING: Indigent South Africans managed in the regional and tertiary hospitals of the Pretoria Academic Complex. METHOD: Since 1997 a standard definition of severe acute maternal morbidity (SAMM) has been used in the Pretoria Academic Complex. All cases of SAMM and maternal deaths were entered on the Maternal Morbidity and Mortality Audit System programme. A comparison of outcome of severely ill women who had complications of abortion was made between 1997-1998 (original protocol) and 2002-2004 (strict protocol). OUTCOME MEASURES: The mortality index and prevalence of organ system failure or dysfunction. RESULTS: In 1997-1998 there were 43 women with SAMM who survived and a further 10 maternal deaths due to complications of abortion, compared with 107 women with SAMM and 7 maternal deaths during 2002-2004. The mortality index declined from 18.9% in 1997-1998 to 6.1% in 2002-2004 (p = 0.02, odds ratio 0.28, 95% confidence limits 0.10 - 0.79). Significantly more women had hypovolaemic shock in 2002-2004 compared with 1997-1998 (54.4% v. 35.8%, p = 0.04), but fewer women had immune system failure including septic shock (18.4% v. 47.2%, p = 0.0002) and metabolic dysfunction (0 v. 5.7%, p = 0.03) and there was a trend to less renal failure (10.5% v. 22.6%, p = 0.06) and cardiac failure (4.4% v. 13.2%, p = 0.08). CONCLUSION: The strict protocol approach based on systemic evaluation in managing critically ill pregnant women with complications of abortion, coupled with an intensive, regular feedback mechanism, has been associated with a reduction in the mortality index. 相似文献
90.