全文获取类型
收费全文 | 348篇 |
免费 | 13篇 |
国内免费 | 20篇 |
专业分类
儿科学 | 11篇 |
妇产科学 | 3篇 |
基础医学 | 39篇 |
口腔科学 | 8篇 |
临床医学 | 35篇 |
内科学 | 57篇 |
皮肤病学 | 9篇 |
神经病学 | 9篇 |
特种医学 | 72篇 |
外科学 | 41篇 |
综合类 | 20篇 |
预防医学 | 11篇 |
药学 | 45篇 |
中国医学 | 1篇 |
肿瘤学 | 20篇 |
出版年
2023年 | 1篇 |
2022年 | 3篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2018年 | 3篇 |
2017年 | 3篇 |
2016年 | 4篇 |
2015年 | 11篇 |
2014年 | 12篇 |
2013年 | 17篇 |
2012年 | 12篇 |
2011年 | 15篇 |
2010年 | 20篇 |
2009年 | 18篇 |
2008年 | 12篇 |
2007年 | 22篇 |
2006年 | 26篇 |
2005年 | 16篇 |
2004年 | 10篇 |
2003年 | 13篇 |
2002年 | 13篇 |
2001年 | 15篇 |
2000年 | 12篇 |
1999年 | 10篇 |
1998年 | 19篇 |
1997年 | 15篇 |
1996年 | 10篇 |
1995年 | 6篇 |
1994年 | 11篇 |
1993年 | 10篇 |
1992年 | 1篇 |
1991年 | 3篇 |
1990年 | 1篇 |
1989年 | 5篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 4篇 |
1984年 | 4篇 |
1983年 | 5篇 |
1982年 | 3篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1977年 | 3篇 |
排序方式: 共有381条查询结果,搜索用时 15 毫秒
71.
72.
Obstruction of the small intestine: accuracy and role of CT in diagnosis 总被引:17,自引:0,他引:17
Maglinte DD; Gage SN; Harmon BH; Kelvin FM; Hage JP; Chua GT; Ng AC; Graffis RF; Chernish SM 《Radiology》1993,188(1):61
73.
74.
C. Savvidou S. N. Chatziioannou A. Pilichou &S. G. Pneumaticos 《Transfusion medicine (Oxford, England)》2009,19(4):202-206
The objective of this study was to explore the use of cell saver blood autotransfusion in spinal surgery and to evaluate the efficacy and cost-effectiveness of cell saver blood autotransfusion during lumbar spine fusion in adults. Specific indications for the use of cell saver in adult lumbar fusion surgery have not yet been clearly determined. A total of 50 consecutive candidates for posterolateral fusion with internal fixation were prospectively randomized into either receiving perioperatively cell saving autotransfusion (Group A: 25 patients) or not (Group B: 25 patients). The use of cell saving technique did not exclude the use of allogenic blood transfusion. Surgical indications were spinal stenosis, spondylolisthesis, adolescent idiopathic scoliosis, degenerative scoliosis and fractures. Medical and financial data were recorded. A cost-analysis was performed. Patients in Group A received 880 ± 216 mL from cell saver and 175 ± 202 mL allogenic blood. The patients in Group B received 908 ± 244 mL allogenic blood. Blood volumes data collected were expressed in mean ± SD values. The cost of blood transfusion in Group A was 995 ±€447 per patient and 1220 ± 269 in Group B ( P < 0.05). In elective lumbar fusion blood requirements can be satisfied with the use of autotransfusion. The use of cell saver appears to be useful and cost-effective during most elective lumbar fusions. 相似文献
75.
KS Amitha Vikrama SN Keshava NRS Surendrababu V Moses P Joseph F Vyas V Sitaram 《Journal of Medical Imaging and Radiation Oncology》2010,54(1):5-8
Jejunal access loop is fashioned in patients who undergo Roux en Y hepaticojejunostomy and biliary intervention is anticipated on follow up. Post-operative study of the biliary tree through the access loop is usually done under fluoroscopic guidance. We present a series of 20 access loop cholangiograms performed in our institution between August 2004 and November 2008. We aimed to evaluate the safety and efficacy of the procedure and to highlight the role of CT guidance in procuring access. Access loop was accessed using CT (n = 13), ultrasound (n = 3) or fluoroscopic guidance (n = 4). Fluoroscopy was used for performing cholangiograms and interventions. Twelve studies had balloon plasty of the stricture at anastomotic site or high up in the hepatic ducts. Seven studies showed normal cholangiogram. Plasty was unsuccessful in one study. Technical success in accessing the jejunal access loop was 100%; in cannulation of anastomotic site and balloon plasty it was 95%. One case required two attempts. Procedure-related complications were not seen. All patients who underwent balloon plasty of the stricture were doing well for variable lengths of time. Access loop cholangiogram and interventions are safe and effective. CT guidance in locating/procuring the access loop is a good technique. 相似文献
76.
77.
78.
先天性无肛直肠舟状窝瘘手术186例 总被引:1,自引:0,他引:1
1临床资料1988-06/2003-12我院共186例,均为女性,无肛门,其中0~6月龄21例,0.5~1岁96例,1~3岁53例,3~8岁15例,13岁1例.以大便从会阴部舟状窝瘘口处排出而就诊,患儿有不同程度的排便困难,严重时伴腹胀呕吐,多数患儿有营养不良性贫血.瘘口直径0.3~0.6 cm,直肠盲端到肛穴皮肤之间的距离1.0~2.5 cm,属于中、低位肛门直肠畸形.本组有3例合并先天性心脏病-室间隔缺损,2例合并骶前囊肿,1例合并脐疝. 相似文献
79.
David?B.?StoutEmail author Arion?F.?Chatziioannou Timothy?P.?Lawson Robert?W.?Silverman Sanjiv?S.?Gambhir Michael?E.?Phelps 《Molecular imaging and biology》2005,7(6):393-402
Purpose
The growing number of mouse and rat experiments, coupled with advances in small-animal imaging systems such as microPET®, optical, microCAT?, microMR, ultrasound and microSPECT, has necessitated a common technical center for imaging small animals.Procedures
At the UCLA Crump Institute for Molecular Imaging, we have designed and built a facility to support the research interests of a wide range of investigators from multiple disciplines. Requirements to satisfy both research and regulatory oversight have been critically examined. Support is provided for investigator training, study scheduling, data acquisition, archiving, image display, and analysis.Results
The center has been in operation for more than 18 months, supporting more than 13,000 individual imaging procedures.Conclusions
We have created a facility that maximizes our resource utilization while providing optimal investigator support, as well as the means to continually improve the quality and diversity of the science by integrating physical and biological sciences.80.
目的:观察成纤维细胞生长因子对培养兔纤维环细胞转化生长因子β2表达的调节作用。方法:实验于2005-03/2006-04在华中科技大学同济医学院附属协和医院骨科实验室完成。培养4月龄雌性日本大白兔的纤维环细胞,在每次换液时加入成纤维细胞生长因子100μg/L,铺满后收集细胞,作纤维环细胞转化生长因子β2常规免疫组织化学研究,细胞呈棕黄色染色为阳性表达信号,同时为进一步明确纤维环细胞转化生长因子β2的定位进行免疫胶体金标记电镜观察。结果:光镜下细胞明显呈棕色,电镜下细胞膜表面有明显的胶金颗粒粘附。结论:成纤维细胞生长因子能促进纤维环细胞转化生长因子β2的表达。 相似文献