全文获取类型
收费全文 | 3231702篇 |
免费 | 270947篇 |
国内免费 | 13476篇 |
专业分类
耳鼻咽喉 | 44565篇 |
儿科学 | 96921篇 |
妇产科学 | 81128篇 |
基础医学 | 518983篇 |
口腔科学 | 88751篇 |
临床医学 | 288608篇 |
内科学 | 565714篇 |
皮肤病学 | 87019篇 |
神经病学 | 277074篇 |
特种医学 | 127055篇 |
外国民族医学 | 107篇 |
外科学 | 511907篇 |
综合类 | 96272篇 |
现状与发展 | 23篇 |
一般理论 | 2173篇 |
预防医学 | 265527篇 |
眼科学 | 73931篇 |
药学 | 224310篇 |
25篇 | |
中国医学 | 9540篇 |
肿瘤学 | 156492篇 |
出版年
2021年 | 54792篇 |
2020年 | 34943篇 |
2019年 | 57914篇 |
2018年 | 70540篇 |
2017年 | 53678篇 |
2016年 | 59141篇 |
2015年 | 73594篇 |
2014年 | 107733篇 |
2013年 | 172770篇 |
2012年 | 84168篇 |
2011年 | 82387篇 |
2010年 | 114127篇 |
2009年 | 119382篇 |
2008年 | 70370篇 |
2007年 | 71741篇 |
2006年 | 83348篇 |
2005年 | 78682篇 |
2004年 | 80674篇 |
2003年 | 71849篇 |
2002年 | 61976篇 |
2001年 | 102650篇 |
2000年 | 95599篇 |
1999年 | 95647篇 |
1998年 | 64447篇 |
1997年 | 62427篇 |
1996年 | 60176篇 |
1995年 | 55667篇 |
1994年 | 49646篇 |
1993年 | 46405篇 |
1992年 | 66399篇 |
1991年 | 62711篇 |
1990年 | 59266篇 |
1989年 | 58800篇 |
1988年 | 54254篇 |
1987年 | 52976篇 |
1986年 | 49881篇 |
1985年 | 50325篇 |
1984年 | 45985篇 |
1983年 | 42353篇 |
1982年 | 40556篇 |
1981年 | 38230篇 |
1980年 | 35950篇 |
1979年 | 36952篇 |
1978年 | 33082篇 |
1977年 | 30844篇 |
1976年 | 27644篇 |
1975年 | 26208篇 |
1974年 | 26594篇 |
1973年 | 25276篇 |
1972年 | 23761篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Peter Marhofer Malachy Columb Phil M. Hopkins Manfred Greher Daniela Marhofer Max R. Levi Bienzle Markus Zeitlinger 《British journal of anaesthesia》2019,122(4):525-531
Background
The efficacy of dexamethasone in extending the duration of local anaesthetic block is uncertain. In a randomised controlled triple blind crossover study in volunteers, we tested the hypothesis that neither i.v. nor perineurally administered dexamethasone prolongs the sensory block achieved with ropivacaine.Methods
Ultrasound-guided ulnar nerve blocks (ropivacaine 0.75% wt/vol, 3 ml, with saline 1 ml with or without dexamethasone 4 mg) were performed on three occasions in 24 male volunteers along with an i.v. injection of saline 1 ml with or without dexamethasone 4 mg. The combinations of saline and dexamethasone were as follows: control group, perineural and i.v. saline; perineural group, perineural dexamethasone and i.v. saline; i.v. group, perineural saline and i.v. dexamethasone. Sensory block was measured using a VAS in response to pinprick testing. The duration of sensory block was the primary outcome and time to onset of sensory block the secondary outcome.Results
All 24 subjects completed the trial. The median [inter-quartile range (IQR)] duration of sensory block was 6.87 (5.85–7.62) h in the control group, 7.37 (5.78–7.93) h in the perineural group and 7.37 (6.10–7.97) h in the i.v. group (P=0.61). There was also no significant difference in block onset time between the three groups.Conclusion
Dexamethasone 4 mg has no clinically relevant effect on the duration of sensory block provided by ropivacaine applied to the ulnar nerve.Clinical trial registration
DRKS, 00014604; EudraCT, 2018-001221-98. 相似文献992.
993.
994.
995.
996.
997.
998.
999.
1000.
M. Novi C. Vanni P. D. Parchi M. Di Paolo N. Piolanti M. Scaglione 《Musculoskeletal surgery》2020,104(1):43-48
Over the years, the number of total hip replacements has been steadily increasing. Despite the improvement in surgical results, the number of claims for malpractice is higher. The primary endpoint of this work is to provide an analysis of litigation after hip replacement, to outline what are the instigating causes and costs. The secondary endpoint is to propose a possible preventive strategy for an improved care and a reduction in legal proceedings. The data of this study were collected from medical and legal files and from professional liability insurance of our institution from January 2005 to December 2016. Out of a total of 4770 THA, 40 claims were received. Peripheral nerve injuries represent the first cause of litigation (37%), followed by infectious complications, leg length discrepancy, metallosis, dislocations of the implant and a case of deep vein thrombosis. From the analysis of the past trial judgment, complications such as nerve lesions and infections are almost always recognized, as a medical error, with a high percentage of claims settled. This study shows the necessity of preventive strategies to reduce the higher number of claims for malpractice in total hip arthroplasty. Some complications such as nerve injuries and infection are frequently considered directly dependent on physician’s errors. Litigations can be reduced providing evidence of a diligent execution of the surgical procedure and of a proper postoperative management: the correct compilation of a specific informed consent and adequate doctor–patient communication. 相似文献