首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   597篇
  免费   34篇
  国内免费   2篇
耳鼻咽喉   11篇
儿科学   26篇
妇产科学   10篇
基础医学   60篇
口腔科学   14篇
临床医学   62篇
内科学   161篇
皮肤病学   20篇
神经病学   33篇
特种医学   11篇
外科学   125篇
综合类   8篇
预防医学   12篇
眼科学   26篇
药学   37篇
中国医学   1篇
肿瘤学   16篇
  2024年   1篇
  2023年   6篇
  2022年   6篇
  2021年   18篇
  2020年   12篇
  2019年   13篇
  2018年   13篇
  2017年   14篇
  2016年   25篇
  2015年   28篇
  2014年   70篇
  2013年   86篇
  2012年   34篇
  2011年   30篇
  2010年   10篇
  2009年   14篇
  2008年   37篇
  2007年   32篇
  2006年   29篇
  2005年   28篇
  2004年   32篇
  2003年   12篇
  2002年   17篇
  2001年   11篇
  2000年   3篇
  1999年   2篇
  1998年   1篇
  1995年   1篇
  1994年   1篇
  1993年   1篇
  1991年   2篇
  1990年   2篇
  1989年   2篇
  1988年   1篇
  1987年   3篇
  1986年   5篇
  1985年   8篇
  1984年   3篇
  1983年   4篇
  1981年   2篇
  1980年   2篇
  1978年   3篇
  1976年   1篇
  1975年   1篇
  1974年   2篇
  1973年   2篇
  1972年   1篇
  1971年   1篇
  1969年   1篇
排序方式: 共有633条查询结果,搜索用时 571 毫秒
1.
2.
Graefe's Archive for Clinical and Experimental Ophthalmology - To evaluate central macular thickness (CMT), subfoveal choroidal thickness (SFCT), and visual outcomes following different...  相似文献   
3.
We report three patients with Feingold 2 syndrome with the novel features of growth hormone deficiency associated with adenohypophyseal compression, aortic dilation, phalangeal joint contractures, memory, and sleep problems in addition to the typical features of microcephaly, brachymesophalangy, toe syndactyly, short stature, and cardiac anomalies. Microdeletions of chromosome 13q that include the MIR17HG gene were found in all three. One of the patients was treated successfully with growth hormone. In addition to expanding the phenotype of Feingold 2 syndrome, we suggest management of patients with Feingold 2 syndrome include echocardiography at the time of diagnosis in all patients and consideration of evaluation for growth hormone deficiency in patients with short stature.  相似文献   
4.
PurposeThis study aimed to evaluate the effects of not using a drain or placing a drain in the glenohumeral (GH) or subacromial (SA) joint spaces on fluid retention and pain in the early postoperative period and late clinical outcomes.MethodsPatients who underwent arthroscopic rotator cuff repair between 2018 and 2020 were included in the study. Before the operation, demographic data, range of motion (ROM), visual analog scale (VAS) scores, Constant–Murley scores has documented. Deltoid muscle diameter (DMD) were measured. The total amount of irrigation used during the surgery and the operation duration were recorded, and the active amount of fluid coming from the drain in patients with a drain was recorded. The first postoperative DMD measure was made in the operating room and accepted as day 0. DMD measurements repeated postoperative first and second day. VAS assessments were performed on the postoperative first and second days. At the outpatient clinic, these measurements were repeated on the first and second weeks after discharge. Functional evaluations were made with ROM and Constant–Murley scores at the final follow-up examination.ResultsThere was no difference in the amount of drainage between the two groups in which a drain was used. When the three groups were compared among themselves regarding preoperative and postoperative VAS scores, Constant–Murley scores, and DMD, no significant difference was found.ConclusionsWe do not recommend the routine use of drains after arthroscopic rotator cuff surgery in terms of cost-effectiveness.Level of evidenceLevel II: Prospective Cohort Study.  相似文献   
5.
Heparin is an important polyanionic drug having a wide variety of different biological activities. Substantial research effort has focused on the preparation of improved heparins and heparin analogues that might exhibit higher specificity and decreased side effects. These heparin analogues or heparinoids include sulfated polysaccharides from plant and animal origin, synthetic derivatives of polysaccharides, and acidic oligosaccharides and their small synthetic analogues. The structure, biological activities and therapeutic potential of these heparinoids are discussed.  相似文献   
6.
7.
8.
Aims: The aim of this study is to investigate the effect of mitral stenosis (MS) on left atrial (LA) function using two‐dimensional speckle tracking echocardiography (2DSTE). Methods and Results: The study subjects consisted of 52 patients with asymptomatic MS and 52 control subjects. LA function was assessed using prototype speckle tracking software and manual tracking method. Maximal LA volume (LAVmax) and minimal LA volume (LAVmin) and LA volume before atrial contraction (LAVpre‐a) were measured. Using these volumes, LA reservoir, conduit and booster pump fuction parameters were calculated. Indexed LAVmax, LAVmin, and LAVpre‐a measurements via speckle tracking were highly correlated with manual tracing methods in both groups. Expansion index (67.8 ± 36.4 vs. 148.3 ± 44.2), diastolic emptying index (37.7 ± 12.9 vs. 58.0 ± 8.5), passive emptying (37.3 ± 14.1 vs. 70.4 ± 10.4) and passive emptying index (13.3 ± 6.3 vs. 41.3 ± 10.6) were decreased significantly in MS patients (P < 0.001). In contrast active emptying index (62.6 ± 4.1 vs. 29.5 ± 10.1) increased in MS group (P < 0.001) while active emptying (28.1 ± 13.0 vs. 28.3 ± 6.9) remained same among both groups. Conclusions: This is the first study relating LA volumes and function assessed by 2DSTE to MS. 2D speckle tracking analysis of LA volume is relatively easy and provides more detailed information regarding the changes in LA volumes during the cardiac cycle.  相似文献   
9.
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号