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   158062篇
  免费   47411篇
  国内免费   192篇
耳鼻咽喉   2585篇
儿科学   6203篇
妇产科学   2388篇
基础医学   26458篇
口腔科学   8103篇
临床医学   18661篇
内科学   43476篇
皮肤病学   9229篇
神经病学   20283篇
特种医学   4199篇
外科学   25113篇
综合类   405篇
一般理论   56篇
预防医学   11689篇
眼科学   2845篇
药学   11189篇
中国医学   1319篇
肿瘤学   11464篇
  2023年   529篇
  2022年   391篇
  2021年   2641篇
  2020年   5814篇
  2019年   12221篇
  2018年   12232篇
  2017年   12675篇
  2016年   13368篇
  2015年   13770篇
  2014年   13872篇
  2013年   15388篇
  2012年   11164篇
  2011年   11379篇
  2010年   12090篇
  2009年   7623篇
  2008年   8286篇
  2007年   7422篇
  2006年   7424篇
  2005年   6924篇
  2004年   6371篇
  2003年   5888篇
  2002年   5727篇
  2001年   2685篇
  2000年   3184篇
  1999年   1592篇
  1998年   376篇
  1997年   280篇
  1996年   276篇
  1995年   250篇
  1994年   205篇
  1993年   188篇
  1992年   310篇
  1991年   292篇
  1990年   217篇
  1989年   226篇
  1988年   154篇
  1987年   145篇
  1986年   154篇
  1985年   159篇
  1984年   163篇
  1983年   115篇
  1982年   127篇
  1981年   107篇
  1980年   112篇
  1979年   90篇
  1978年   76篇
  1976年   57篇
  1975年   54篇
  1974年   69篇
  1973年   66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