全文获取类型
收费全文 | 3812篇 |
免费 | 295篇 |
国内免费 | 49篇 |
专业分类
耳鼻咽喉 | 68篇 |
儿科学 | 144篇 |
妇产科学 | 58篇 |
基础医学 | 333篇 |
口腔科学 | 64篇 |
临床医学 | 511篇 |
内科学 | 612篇 |
皮肤病学 | 69篇 |
神经病学 | 274篇 |
特种医学 | 357篇 |
外科学 | 528篇 |
综合类 | 256篇 |
预防医学 | 323篇 |
眼科学 | 42篇 |
药学 | 187篇 |
2篇 | |
中国医学 | 34篇 |
肿瘤学 | 294篇 |
出版年
2022年 | 32篇 |
2021年 | 49篇 |
2020年 | 47篇 |
2019年 | 26篇 |
2018年 | 37篇 |
2017年 | 37篇 |
2016年 | 41篇 |
2015年 | 68篇 |
2014年 | 86篇 |
2013年 | 119篇 |
2012年 | 190篇 |
2011年 | 196篇 |
2010年 | 137篇 |
2009年 | 139篇 |
2008年 | 160篇 |
2007年 | 166篇 |
2006年 | 155篇 |
2005年 | 138篇 |
2004年 | 125篇 |
2003年 | 115篇 |
2002年 | 123篇 |
2001年 | 104篇 |
2000年 | 106篇 |
1999年 | 78篇 |
1998年 | 104篇 |
1997年 | 97篇 |
1996年 | 86篇 |
1995年 | 81篇 |
1994年 | 57篇 |
1993年 | 64篇 |
1992年 | 54篇 |
1991年 | 57篇 |
1990年 | 56篇 |
1989年 | 80篇 |
1988年 | 73篇 |
1987年 | 79篇 |
1986年 | 62篇 |
1985年 | 50篇 |
1984年 | 41篇 |
1983年 | 44篇 |
1982年 | 26篇 |
1980年 | 23篇 |
1979年 | 30篇 |
1978年 | 26篇 |
1977年 | 23篇 |
1959年 | 23篇 |
1958年 | 29篇 |
1956年 | 30篇 |
1955年 | 42篇 |
1954年 | 35篇 |
排序方式: 共有4156条查询结果,搜索用时 15 毫秒
2.
3.
M. J. Englesbe S. J. Pelletier S. Kheterpal M. O'Reilly D. A. Campbell Jr. 《American journal of transplantation》2006,6(4):666-670
The severity of illness in transplant patients and the complexity of transplant operations results in significant postoperative morbidity and mortality. Remarkable efforts have been made by transplant physicians to study and improve organ allocation, graft and patient survival, immunosuppression and the long-term management of post-transplant complications. Less effort has been spent studying the actual transplant operation and systems of acute transplant care. The National Surgical Quality Improvement Program (NSQIP) has provided a standardized approach to quality improvement and has demonstrated significant potential for a reduction in postoperative morbidity and mortality in other surgical disciplines. Medical centers are under increasing pressure to measure surgical quality and the nexus of transplant surgical quality improvement should not lie in the hands of CMS or JACHO, but rather it should be created and developed within the transplant community. The time has come for a national transplant surgical quality improvement program based on the NSQIP infrastructure. Such a proactive approach toward quality improvement from the transplant community is an excellent investment for patients, providers and health care payers. 相似文献
4.
Dr. Arni Raghavendrarao Raghuram M.Ch. Subbiah Kumar MD Kathamuthu Balamurugan DA Arulmurugan DA Ramiah Krishnan M.Ch. Perichiappan Sivakami BS Eluvathingal Varghese John M.Ch. 《Indian Journal of Thoracic and Cardiovascular Surgery》2006,22(3):178-181
Background Beating heart surgery has now become the commonest technique of doing Coronary Artery Bypass Graft Surgery (CABG) in our country.
It is being used even in such high risk situations like diffuse coronary disease and Critical Left Main stem Stenosis (LMCS)
with good results. The aim of this study is to retrospectively review our results in Off-Pump Coronary Artery Bypass Surgery
(OPCAB) in patients with critical left main stem stenosis.
Methods This study is a retrospective analysis of the data of patients who underwent primary coronary artery bypass surgery. During
the period from April 2003 to September 2005 a total of 64 patients underwent OPCAB procedure for critical LMCS. During the
same period 10 patients underwent CABG on Cardio Pulmonary Bypass (CPB). The age range was 36–77yrs. The sex distribution
was M: F 53∶10. Ten patients were done as emergency. 2 of them were on Intra Aortic Balloon Pump (IABP) support preoperatively.
10 patients were high risk with a Euro score of ≥5.
Results Left Internal Mammary Artery (LIMA) was used in 78% of cases. Average grafts per patient was 2.96. The median ventilation
time was 5.91 hrs. New IABP insertion in postoperative period was required in 1 patient. One patient was reexplored for bleeding.
There was one perioperative myocardial infarction. 57% of patients did not need any blood transfusion. There was no conversion
to CPB. There was no operative mortality. Inotropes were used in ten cases.
Conclusions OPCAB is a safe method of revascularization in patients with critical LMCS. Preoperative IABP is useful in patients with cardiogenic
shock. However, there is a place for CPB in patients needing additional procedures like Mitral Valve repair (MV repair) or
Dor's procedure or when the vessels are very diffusely diseased. Those patients who are unstable despite IABP support may
be managed by Beating heart On Pump (BHOP) technique. 相似文献
5.
B A Davis D A Durden R L O'Reilly 《Progress in neuro-psychopharmacology & biological psychiatry》1991,15(4):503-512
1. The plasma concentrations of unconjugated phenylacetic acid and m-hydroxyphenylacetic acid are lower in male than in female subjects. 2. The plasma concentrations of unconjugated phenylacetic acid and mandelic acid decrease with increasing weight and height for all subjects combined. The same relationships apply for both males and females but are significant only for males. 3. Homovanillic and vanillylmandelic acid concentrations in plasma increase with age. 4. The importance of using age, sex, weight and height matched groups in studies involving the plasma concentrations of some of the trace amine metabolites in psychiatric disorders has been demonstrated. This is particularly the case for phenylacetic acid, the major metabolite of phenylethylamine which is now thought to be a neuromodulator of catecholaminergic neurotransmission. 相似文献
6.
7.
8.
9.
氟西汀与阿米替林治疗105例抑郁障碍病人的双盲对照试验 总被引:6,自引:4,他引:2
目的:评价国产氟西汀的抗抑郁作用及安全性。方法:采用随机、双盲对照、多中心研究,分为国产氟西汀组57例(男性22例,女性35例;年龄40±s13a),口服氟西汀20mg,qd,阿米替林57例(男性27例,女性30例;年龄40±14a),口服阿米替林75mg,bid,疗程6wk。结果:氟西汀治疗抑郁障碍的疗效与阿米替林相当,总有效率分别为85%及92%(P>0.05);氟西汀组的主要副作用有口干、便秘、恶心、心动过速等,但较之阿米替林程度轻且发生率低。结论:氟西汀的抗抑郁作用与阿米替林相当,副作用少,服用方便。 相似文献
10.
J. O’Byrne S. Eustace M. M. Stephens M. N. M. R. Farahat G. Yanni R. Posten G. S. Panayi S. Sant R. Costello M. Barry J. Hassan C. Feighery B. Bresnihan A. Whelan F. Coakley A. M. de Paor R. B. Reilly E. B. Casey V. J. Tormey G. Kearns K. Gaffney P. J. Freyne M. Callaghan O. FitzGerald D. Veale E. O’Nuallain D. Reen D. Veale M. Farrell O. FitzGerald S. Rogers L. Barnes R. J. Coughlan C. McCarthy M. McDermott D. Hourihane C. O'Morain S. O'Reilly P. Hartley E. Casey L. Clancy F. Mulcahy N. Hall A. Murphy C. Breen D. Kelleher M. Abuzakouk C. O'Farrelly 《Irish journal of medical science》1992,161(6):438-442