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   101099篇
  免费   44789篇
  国内免费   73篇
耳鼻咽喉   2208篇
儿科学   4862篇
妇产科学   2692篇
基础医学   19416篇
口腔科学   6153篇
临床医学   13470篇
内科学   27570篇
皮肤病学   8343篇
神经病学   15829篇
特种医学   2566篇
外科学   16257篇
综合类   139篇
一般理论   25篇
预防医学   6205篇
眼科学   2420篇
药学   8766篇
中国医学   1044篇
肿瘤学   7996篇
  2022年   353篇
  2021年   1920篇
  2020年   5301篇
  2019年   11126篇
  2018年   10593篇
  2017年   11734篇
  2016年   12459篇
  2015年   12361篇
  2014年   12438篇
  2013年   13199篇
  2012年   5336篇
  2011年   5368篇
  2010年   9571篇
  2009年   5680篇
  2008年   2896篇
  2007年   1969篇
  2006年   2106篇
  2005年   1785篇
  2004年   1905篇
  2003年   1843篇
  2002年   1785篇
  2001年   1463篇
  2000年   1386篇
  1999年   843篇
  1998年   229篇
  1992年   400篇
  1991年   341篇
  1990年   360篇
  1989年   422篇
  1988年   467篇
  1987年   450篇
  1986年   455篇
  1985年   431篇
  1984年   352篇
  1983年   266篇
  1979年   525篇
  1978年   321篇
  1977年   262篇
  1976年   248篇
  1975年   339篇
  1974年   510篇
  1973年   511篇
  1972年   427篇
  1971年   402篇
  1970年   388篇
  1969年   409篇
  1968年   352篇
  1967年   267篇
  1966年   294篇
  1965年   176篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.

Background and objectives

A prompt and effective management of trauma patient is necessary. The aim of this case report is to highlight the importance of intraoperative echocardiography as a useful tool in patients suffering from refractory hemodynamic instability no otherwise explained.

Case report

A 41 year‐old woman suffered a car accident. At the emergency department, no abnormalities were found in ECG or chest X‐ray. Abdominal ultrasound revealed the presence of abdominal free liquid and the patient was submitted to urgent exploratory laparotomy. Nevertheless, she persisted suffering arterial hypotension and metabolic acidosis. Looking for the reason of her hemodynamic instability, intraoperative transthoracic echocardiography was performed, finding out the presence of pericardial effusion. Once the cardiac surgeon extracted pericardial clots, patient's situation improved clinically and analytically.

Conclusion

Every anesthesiologist should be able to use the intraoperative echocardiography as an effective tool in order to establish the appropriate measures to promote the survival of patients suffering severe trauma.  相似文献   
14.
15.
16.
17.
Direct peroral cholangioscopy (POC) using an ultra‐slim upper endoscope is one modality of POC for intraductal endoscopic evaluation and treatment of the bile duct. Choledochoduodenostomy (CDS) is one modality of biliary bypass surgery that provides a new route to the bile duct. We carried out direct POC using an ultra‐slim upper endoscope without the use of accessories in 10 patients (four sump syndromes, three bile duct strictures and three intrahepatic duct stones) previously undergoing surgical CDS. Direct POC was successful in all patients. The use of an intraductal balloon catheter was required in one patient for advancement of the endoscope into the bile duct. Distal bile ducts with sump syndromes were cleared using baskets and water irrigation under direct POC. Cholangiocarcinoma was diagnosed in one patient with hilar bile duct stricture after cholangioscopic evaluation and a targeting forceps biopsy under direct POC. Intrahepatic duct stones were successfully extracted after intraductal fragmentation under direct POC. Oozing bleeding occurred during intraductal lithotripsy but stopped spontaneously. Direct POC using an ultra‐slim upper endoscope without the assistance of accessories can easily be carried out in patients undergoing CDS.  相似文献   
18.
19.
Acne vulgaris (acne) is a chronic inflammatory disease of the sebaceous gland, characterized by follicular hyperkeratinization, excessive colonization by Propionibacterium acnes (Pacnes) as well as immune reactions and inflammation. Despite an armamentarium of topical treatments available including benzoyl peroxide, retinoids and azelaic acid, topical antibiotics in monotherapies, especially erythromycin and clindamycin, are still used in Europe to treat acne. This intensive use led to antimicrobial‐resistant P. acnes and staphylococci strains becoming one of the main health issues worldwide. This is an update on the current topical acne treatments available in Europe, their mechanism of action, their potential to induce antimicrobial resistance and their clinical efficacy and safety.  相似文献   
20.
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