全文获取类型
收费全文 | 8329篇 |
免费 | 823篇 |
国内免费 | 540篇 |
专业分类
耳鼻咽喉 | 32篇 |
儿科学 | 48篇 |
妇产科学 | 77篇 |
基础医学 | 1155篇 |
口腔科学 | 86篇 |
临床医学 | 1148篇 |
内科学 | 1583篇 |
皮肤病学 | 61篇 |
神经病学 | 455篇 |
特种医学 | 297篇 |
外国民族医学 | 15篇 |
外科学 | 870篇 |
综合类 | 964篇 |
现状与发展 | 4篇 |
预防医学 | 482篇 |
眼科学 | 85篇 |
药学 | 857篇 |
35篇 | |
中国医学 | 589篇 |
肿瘤学 | 849篇 |
出版年
2024年 | 28篇 |
2023年 | 179篇 |
2022年 | 494篇 |
2021年 | 661篇 |
2020年 | 503篇 |
2019年 | 434篇 |
2018年 | 428篇 |
2017年 | 364篇 |
2016年 | 398篇 |
2015年 | 589篇 |
2014年 | 672篇 |
2013年 | 652篇 |
2012年 | 799篇 |
2011年 | 827篇 |
2010年 | 520篇 |
2009年 | 430篇 |
2008年 | 415篇 |
2007年 | 374篇 |
2006年 | 329篇 |
2005年 | 365篇 |
2004年 | 79篇 |
2003年 | 64篇 |
2002年 | 30篇 |
2001年 | 11篇 |
2000年 | 6篇 |
1999年 | 8篇 |
1998年 | 5篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 4篇 |
1994年 | 5篇 |
1993年 | 4篇 |
1992年 | 1篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1964年 | 1篇 |
排序方式: 共有9692条查询结果,搜索用时 15 毫秒
61.
目的分析主动脉瓣置换术在治疗主动脉瓣重度狭窄伴左心室收缩功能受损患者中的疗效。方法回顾性分析2000年1月至2011年12月在第二军医大学长海医院接受手术治疗的主动脉瓣重度狭窄伴左心室收缩功能受损[左心室射血分数(LVEF)〈50%]患者的临床资料,排除二尖瓣狭窄患者。共纳入29例患者,男22例、女7例,年龄14~76(56.3±12.9)岁。将患者手术前后临床及心脏超声心动图相关指标进行比较,评价手术效果,并根据患者LVEF恢复情况,分析可能影响患者术后心脏功能恢复的危险因素。结果术后早期死亡1例。其余28例患者术后主动脉瓣跨瓣压差由(97.6±25.1)mmHg降至(25.0±9.7)mmHg,LVEF由41%±6%增加至56%±11%,左心室舒张/收缩期末直径/容积均较术前明显改善(P均〈0.001)。结论主动脉瓣膜置换术是主动脉瓣重度狭窄伴左心室收缩功能受损患者的有效治疗方法,术后左心室超声指标显著改善。术前左心室扩大程度较低可能更利于术后LVEF的恢复。 相似文献
62.
63.
Zhengguang Wang Bing Wang Bangliang Yin Weidong Liu Fan Yang Guohua Lv 《European spine journal》2014,23(3):560-568
Purpose
To investigate the relationship between spinopelvic parameters and clinical symptoms for patients with severe isthmic spondylolisthesis.Methods
A series of spinopelvic parameters were measured in 64 patients with L5 severe isthmic spondylolisthesis. The patients were divided into two groups according to Oswestry score obtained preoperatively, i.e. mild or severe low back pain group. T test was used to compare parameters between two groups, and multiple linear regression analysis was employed to investigate the association between parameters and Oswestry score.Results
Compared with two group patients, parameters of spondylolisthesis grade, pelvic tilt (PT), lumbar lordosis (LL), T9 tilting angle (T9TA), sacro-femoral horizontal distance (SFHD), distance between perpendicular line through C7 and sacrum (SC7D), pelvic tilt/sacral slope (PT/SS), sacro-femoral horizontal distance/vertical distance (SFHD/SFVD), and lumbar lordosis/thoracic kyphosis (LL/TK) were significantly increased in severe low back pain group, while SS and SFVD were significantly decreased, and no significant difference was found for pelvic incidence (PI) and TK. The statistical analysis showed that spondylolisthesis grade, PT, SC7D, LL, SFHD, PT/SS, SFHD/SFVD, and LL/TK had a significant positive correlation with Oswestry score, with an order of spondylolisthesis grade > PT/SS > SC7D > PT > SFHD/SFVD > SFHD > LL/TK > LL. No significant correlation was found for PI, TK, T9TA with Oswestry score, while SS and SFVD had a significant negative correlation with Oswestry score, with an order of SS > SFVD.Conclusions
The spinopelvic parameters (spondylolisthesis grade, SS, PT, SC7D, LL, SFVD, SFHD, PT/SS, SFHD/SFVD, LL/TK) are significantly correlated with clinical symptoms of severe isthmic spondylolisthesis in patients. The association of the exacerbation of low back pain with SS (correlation coefficient −0.981, strong) and SFVD (correlation coefficient −0.802, strong) is the most significant correlation. 相似文献64.
目的系统分析我国医院护理人文关怀评价的研究现状,为该领域研究提供参考。方法采用文献计量学分析法对建库至2017年12月31日收录于中国期刊全文数据库(CNKI)、万方数据库及台湾核心学术期刊(TWS)的相关文献进行分析。结果纳入文献799篇,739篇为期刊文献,242篇为核心期刊收录; 1998年发表第1篇,以后发文量逐年增加,2016年最多,达118篇;发文最多的作者、单位、省份及地区分别是学者刘义兰、华中科技大学同济医学院附属协和医院、广东省及华东地区; 125篇受到基金资助;被引次数平均为6. 36次。研究类型中干预型597篇,调查型202篇;与医院护理人文关怀相关且有信效度的评价工具共28个,使用次数≥5次的8个。结论我国学者在医院护理人文关怀评价方面已进行较多探索,单方面评价与国外研究水平大同小异,但关于医院护理人文关怀实践效果评价有待进一步研究。 相似文献
65.
目的构建适用于肝胆外科的加速康复评价指标体系,为加速康复外科实施效果提供评价工具。方法在零缺陷管理理论基础上,通过文献查阅、德尔菲专家咨询法构建肝胆外科加速康复评价指标体系。结果 2轮问卷回收率均为100%,专家权威系数分别为0.920、0.919。经过2轮专家咨询,最终构建的肝胆外科加速康复评价指标体系包括3个一级指标,8个二级指标,39个三级指标;指标重要性评分均4分,变异系数0~0.166;并确定各级指标权重。结论肝胆外科加速康复评价指标体系构建合理,有较好的可信度,经验证后可作为肝胆外科加速康复质量评价工具。 相似文献
66.
67.
Qin‐Hong Zhang Zhong‐Ren Sun Jin‐Huan Yue Xue Ren Li‐Bo Qiu Xiao‐Lin Lv Wei Du 《International wound journal》2013,10(2):221-231
To assess the effect of Traditional Chinese Medicine (TCM) [Chinese herbal medicine ointment (CHMO), acupuncture and moxibustion] on pressure ulcer. In this study, we searched MEDLINE, EMBASE, CENTER, CBM, CNKI, WAN FANG and VIP for articles published from database inception up to 4 April 2011. We included randomised controlled trials (RCTs), which compared the effects of TCM with other interventions. We assessed the methodological quality of these trials using Cochrane risk of bias criteria. Ten of 565 potentially relevant trails that enrolled a total of 893 patients met our inclusion criteria. All the included RCTs only used CHMO intervention, because acupuncture and moxibustion trials failed to meet the inclusive criteria. A meta‐analysis showed beneficial effects of CHMO for pressure ulcer compared with other treatments on the total effective rate [risk ratio (RR): 1·28; 95% confidence interval (CI): 1·20–1·36; P = 0·53; I2 = 0%), curative ratio (RR: 2·02; 95% CI: 1·73–2·35; P = 0·11; I2 = 37%) and inefficiency rate (RR: 0·16; 95% CI: 0·02–0·80; P = 0·84; I2 = 0%). However, the funnel plot indicated that there was publication bias in this study. The evidence that CHMO is effective for pressure ulcer is encouraging, but due to several caveats, not conclusive. Therefore, more rigorous studies seem warranted. 相似文献
68.
69.
Fu Y Xie B Ben D Lv K Zhu S Lu W Tang H Cheng D Ma B Wang G Xiao S Wang G Xia Z 《Burns : journal of the International Society for Burn Injuries》2012,38(1):90-94
The present study aims to define the trend of time related changes with local bacterial alteration of bacterial resistance in severe burns in our burn center during a 12-year period. Retrospective analysis of microbiological results on severely burned wounds between 1998 and 2009 was carried out. A study of 3615 microbial isolates was performed. Staphylococcus aureus was the most commonly isolated pathogen (38.2%) followed by A. baumannii (16.2%), Streptococcus viridans (11.4%), Pseudomonas aeruginosa (10.4%), coagulase-negative staphylococci (CNS, 9.2%). The species ratios of S. aureus and A. baumannii increased significantly from 1st to 8th week of hospitalization, while those of Streptococcus viridans, P. aeruginosa and coagulase-negative staphylococci decreased during the same period. Bacterial resistance rates were compared between the periods 1998-2003 and 2004-2009. Vancomycin remained as the most sensitive antibiotic in S. aureus including methicillin-resistant S. aureus (MRSA). It was very likely that the majority of infections caused by Streptococcus viridans, P. aeruginosa and coagulase-negative staphylococci occurred in the early stage of burn course and the majority of infections caused by A. baumannii occurred 4 weeks after admission. The use of different antibiotics was probably the major contributor to these trends. 相似文献
70.
背景:关节软骨无血管分布,其营养来自关节液和软骨下骨,哪条营养通路对关节软骨更为重要是学者们争论的焦点。目的:研究软骨下营养对关节软骨的影响,并探讨软骨下营养与骨关节炎的关系。方法:45只5个月龄雄性新西兰大白兔,建立股骨滑车骨软骨缺损的动物模型,并随机分为3组:自体骨软骨块移植组(Control组,n=15);假手术组(Sham组,n=15),用环钻在股骨滑车钻取骨软骨块,将其置入管状PVC内,原位回植;阻断软骨下营养组(DNBM组,n=15),取出骨软骨后,将其置入帽状PVC内,原位回植。术后4周、8周、12周,每组5只(10膝),取出膝关节进行大体评分、组织学评分、软骨厚度测量、凋亡染色(TUNEL染色)。结果:与Control组相比,大体评分结果提示,DNBM组软骨无明显退变;组织学评分结果提示,术后12周时DNBM组软骨明显退变(P〈0.005);软骨厚度测量结果提示,术后8周、12周时DNBM组软骨厚度明显变小(P=0.00);TUNEL染色结果提示,术后8周、12周时DNBM组关节软骨细胞凋亡明显增加(P〈0.01)。结论:软骨下营养是软骨的重要营养来源,失去软骨下营养,软骨会逐渐发生退变。 相似文献