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   859篇
  免费   37篇
  国内免费   22篇
耳鼻咽喉   2篇
儿科学   59篇
妇产科学   62篇
基础医学   79篇
口腔科学   17篇
临床医学   80篇
内科学   137篇
皮肤病学   8篇
神经病学   44篇
特种医学   168篇
外科学   76篇
综合类   34篇
预防医学   22篇
眼科学   27篇
药学   40篇
肿瘤学   63篇
  2022年   4篇
  2021年   12篇
  2020年   10篇
  2019年   10篇
  2018年   8篇
  2017年   5篇
  2016年   10篇
  2015年   16篇
  2014年   22篇
  2013年   22篇
  2012年   27篇
  2011年   24篇
  2010年   19篇
  2009年   24篇
  2008年   32篇
  2007年   45篇
  2006年   41篇
  2005年   18篇
  2004年   27篇
  2003年   18篇
  2002年   15篇
  2001年   25篇
  2000年   15篇
  1999年   22篇
  1998年   36篇
  1997年   27篇
  1996年   29篇
  1995年   24篇
  1994年   22篇
  1993年   26篇
  1992年   27篇
  1991年   9篇
  1990年   17篇
  1989年   17篇
  1988年   14篇
  1987年   17篇
  1986年   20篇
  1985年   15篇
  1984年   20篇
  1983年   13篇
  1982年   11篇
  1981年   11篇
  1980年   16篇
  1979年   4篇
  1978年   9篇
  1977年   12篇
  1976年   15篇
  1975年   5篇
  1974年   8篇
  1967年   4篇
排序方式: 共有918条查询结果,搜索用时 15 毫秒
41.
This review has presented current information regarding thromboprophylaxis in surgery, including pregnancy. Where feasible, references have included current consensus conference recommendations and reliable review articles. Orthopedic surgical thromboprophylaxis has intentionally been deleted, as this topic is well covered in other articles in this issue (EurJ Med Res 9(3), March 2004).  相似文献   
42.
This article describes the aims and objectives of a small pilot audit project to evaluate the impact of guideline recommendations to reduce pressure ulcer development on practice and patient care.  相似文献   
43.
The pathophysiologic mechanisms and clinical and laboratory manifestations of DIC are complex, partly because of inter-relationships within the hemostasis system. Only by clearly understanding these extraordinarily complex pathophysiologic inter-relationships can the clinician and laboratory scientist appreciate the divergent and wide spectrum of often-confusing clinical and laboratory findings in patients with DIC. Many therapeutic decisions to be made are controversial and lack validation. Nevertheless, newer antithrombotic agents and agents that can block, blunt, or modify cytokine activity and the activity of vasoactive substances seem to be of value. The complexity and variable degree of clinical expression suggest that therapy should be individualized depending on the nature of DIC, the patient's age, etiology of DIC, site and severity of hemorrhage or thrombosis, and hemodynamics and other appropriate clinical parameters.  相似文献   
44.
45.

Background  

Some complications of childbirth (for example, faecal incontinence) are a source of social embarrassment for women, and are often under reported. Therefore, it was felt important to determine levels of complications (against established standards) and to consider obstetric measures aimed at reducing them.  相似文献   
46.
Two neonates with arrhythmias and the long QT syndrome are described. The arrhythmias were detected in utero and both infants were apparently well after birth. The first infant, although well, had a bradycardia for the first 9 days of life. A normal heart rate was documented at 10 days but a prolonged QT interval was not appreciated on the ECG. He was discharged from hospital but died suddenly and unexpectedly 3 days later. A post-mortem examination failed to find a cause for his death which therefore fell into the category of the sudden infant death syndrome (SIDS). A retrospective analysis of the perinatal electrocardiogram showed a probable junctional rhythm with 2:1 conduction to the ventricle; the QT interval was prolonged at 0.52 seconds (QTC = 0.63). The second infant had a QT interval of 0.52 seconds (QTC = 0.54) and frequent ventricular premature beats on a 24-hour electrocardiogram. She was treated with propranolol and remains well 2 years later. Sudden infant death has often been described in the siblings of children with the long QT syndrome and one other report described a case of SIDS which was said to have had a prolonged QT interval on the perinatal ECG. This report, however, provides unquestionable evidence, in one case, of an association between the long QT syndrome and SIDS.  相似文献   
47.
PACS: the silent revolution   总被引:5,自引:2,他引:5  
More than 15 years ago the idea of a Picture Archiving and Communication System (PACS) and a filmless hospital was created. In a PACS environment images are acquired, read, communicated and stored digitally. After many years of unsuccessful attempts and prototype installations, the necessary hardware components for a successful PACS installation are now readily available. However, software development is still lagging behind. Only very recently, software developers have realized that it is not sufficient for PACS software to store, communicate and display images, but that PACS software should effectively support the radiologist in the task of interpreting and communicating imaging findings through context-dependent default display arrangements, work-flow management, radiological and hospital information systems integration, and computer-assisted diagnosis. This review examines hard- and software requirements for efficient PACS operation, analyses costs and benefits, and discusses future developments. Received: 26 October 1998; Revision received: 11 January 1999; Accepted: 4 February 1999  相似文献   
48.

Background

Phaconit or ultra micro incision phacoemulsification cataract surgery involves phacoemulsification through a 0.9 millimetre sleeveless phaco tip and irrigating chopper followed by implantation of a rollable intraocular lens. The procedure leads to negligible astigmatism and faster visual recovery as compared to phacoemulsification with a foldable intraocular lens.

Methods

This prospective study analysed 80 cases of sub millimetre phaconit surgery with implantation of rollable intraocular lenses(IOL) in 40 cases and acrylic foldable IOL in the remaining 40 cases. Evaluation of efficacy and adaptability of procedure, equipment settings, operative constraints, postoperative complications, keratometric and topographic evaluation of induced astigmatism with visual outcome and patient''s rehabilitation were studied.

Results

The intraoperative complications were surge/ chamber collapse in 16 (20%), iris chaffing in one and corneal burns in two cases. All cases had an induced astigmatism of less than or equal to ± 0.25 D in four to six weeks after rollable IOL and ± 0.5 D to ± 0.75 D after acrylic IOL implantation. All patients had best-corrected visual acuity of 6/6 by third post operative day.

Conclusion

Phaconit with rollable IOL is a perfect blend of surgical skill, application of technology and ultra thin IOL.Key Words: Phaconit, Ultra micro phaco, Submillimetre incision, Rollable IOL implantation  相似文献   
49.
Breast infection and breast sepsis secondary to Pseudomonas aeruginosa is uncommon. We report two cases of pseudomonal breast infection leading to septic shock and abscess formation in women with non-responding breast infection. The management of breast infection is broad-spectrum antibiotics and ultrasound with aspiration of any collection. To treat breast infection effectively, the causative organism must be isolated to enable appropriate antibiotic therapy.  相似文献   
50.
The effects of benzo(a)pyrene (BaP), a highly prevalent environmental carcinogen, on the ability of peritoneal exudate macrophages to produce the secretory immunomodulatory molecule interleukin-1 (IL-1) in vitro was examined. A dose-dependent increase in lipopolysaccharide stimulated IL-1 production concomitant with decreased cell viabilities was noted in macrophages cultured in the presence of BaP. Antibody responses which are suppressed in BaP dosed mice can be reconstituted in vitro by the addition of exogenous interleukin-1. These results indicate that one of the cellular targets of BaP induced immunosuppression may be cells of the macrophage-monocyte lineage. Furthermore, BaP induced suppression of antibody responsiveness may be a result of alterations in production of IL-1.  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