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   2830篇
  免费   181篇
  国内免费   45篇
耳鼻咽喉   17篇
儿科学   155篇
妇产科学   51篇
基础医学   209篇
口腔科学   53篇
临床医学   353篇
内科学   533篇
皮肤病学   49篇
神经病学   198篇
特种医学   310篇
外科学   403篇
综合类   218篇
一般理论   1篇
预防医学   185篇
眼科学   20篇
药学   148篇
  2篇
中国医学   32篇
肿瘤学   119篇
  2022年   33篇
  2021年   34篇
  2020年   34篇
  2018年   38篇
  2017年   27篇
  2016年   31篇
  2015年   40篇
  2014年   61篇
  2013年   97篇
  2012年   99篇
  2011年   112篇
  2010年   107篇
  2009年   120篇
  2008年   109篇
  2007年   110篇
  2006年   110篇
  2005年   81篇
  2004年   77篇
  2003年   72篇
  2002年   70篇
  2001年   68篇
  2000年   61篇
  1999年   61篇
  1998年   97篇
  1997年   88篇
  1996年   82篇
  1995年   77篇
  1994年   51篇
  1993年   55篇
  1992年   40篇
  1991年   54篇
  1990年   36篇
  1989年   45篇
  1988年   59篇
  1987年   57篇
  1986年   46篇
  1985年   52篇
  1984年   34篇
  1983年   36篇
  1982年   21篇
  1981年   19篇
  1980年   23篇
  1978年   20篇
  1977年   19篇
  1959年   23篇
  1958年   30篇
  1957年   19篇
  1956年   30篇
  1955年   42篇
  1954年   36篇
排序方式: 共有3056条查询结果,搜索用时 15 毫秒
1.
2.
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   
3.
4.
5.
6.
7.
A total of 75 patients was placed into 1 of 3 classes of sexual dysfunction based on nocturnal penile tumescence tracings rather than on etiology of the sexual dysfunction. The patients then were given an intracavernous injection with incremental dosages of 0.2 to 1.0 ml. of a combination of papaverine hydrochloride and phentolamine mesylate vasoactive intracavernous therapy. The results of the study were categorized as class 1--mild sexual dysfunction (100% successful with low dosages of medication), class 2--moderate sexual dysfunction (95% successful but larger dosages of medication were required) and class 3--severe sexual dysfunction (a 50:50 chance of a successful treatment and even higher dosages of medication were required). A portable home nocturnal tumescence monitor classification of severity of sexual dysfunction provided a guideline for the intracavernous pharmacological injection initial dosage and the probability of success or failure in patients who desire this form of therapy for male sexual dysfunction.  相似文献   
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.
Metastasis to skeletal muscle from colorectal carcinoma. A case report   总被引:1,自引:0,他引:1  
In a 75-year-old woman, adenocarcinoma of the rectum recurred in the skeletal muscle after a two-year disease-free interval. Spread of colorectal carcinoma to skeletal muscle is infrequent. Only three cases seem to have been previously reported in the literature.  相似文献   
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