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   140593篇
  免费   49687篇
  国内免费   3503篇
耳鼻咽喉   2026篇
儿科学   5215篇
妇产科学   1896篇
基础医学   23138篇
口腔科学   6143篇
临床医学   20004篇
内科学   33756篇
皮肤病学   8161篇
神经病学   16385篇
特种医学   5143篇
外国民族医学   35篇
外科学   21910篇
综合类   9400篇
现状与发展   15篇
一般理论   39篇
预防医学   8512篇
眼科学   2862篇
药学   12432篇
  51篇
中国医学   4104篇
肿瘤学   12556篇
  2024年   153篇
  2023年   838篇
  2022年   1910篇
  2021年   4319篇
  2020年   7059篇
  2019年   12527篇
  2018年   12045篇
  2017年   13082篇
  2016年   13692篇
  2015年   14291篇
  2014年   14940篇
  2013年   15454篇
  2012年   8956篇
  2011年   9172篇
  2010年   12073篇
  2009年   7876篇
  2008年   5775篇
  2007年   4742篇
  2006年   4483篇
  2005年   4048篇
  2004年   3451篇
  2003年   3217篇
  2002年   3064篇
  2001年   2707篇
  2000年   2547篇
  1999年   1966篇
  1998年   904篇
  1997年   900篇
  1996年   720篇
  1995年   618篇
  1994年   535篇
  1993年   376篇
  1992年   705篇
  1991年   604篇
  1990年   564篇
  1989年   498篇
  1988年   445篇
  1987年   388篇
  1986年   333篇
  1985年   277篇
  1984年   206篇
  1983年   154篇
  1982年   110篇
  1981年   111篇
  1980年   75篇
  1979年   111篇
  1978年   76篇
  1974年   69篇
  1973年   64篇
  1972年   67篇
排序方式: 共有10000条查询结果,搜索用时 665 毫秒
21.

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   
22.
23.
24.
25.
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   
26.
27.
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   
28.
29.
30.
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