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   514篇
  免费   30篇
  国内免费   5篇
耳鼻咽喉   2篇
儿科学   2篇
妇产科学   4篇
基础医学   41篇
口腔科学   1篇
临床医学   37篇
内科学   190篇
皮肤病学   6篇
神经病学   50篇
特种医学   13篇
外科学   78篇
预防医学   17篇
药学   80篇
中国医学   4篇
肿瘤学   24篇
  2024年   2篇
  2023年   3篇
  2022年   12篇
  2021年   13篇
  2020年   5篇
  2019年   10篇
  2018年   11篇
  2017年   7篇
  2016年   13篇
  2015年   13篇
  2014年   14篇
  2013年   20篇
  2012年   21篇
  2011年   32篇
  2010年   15篇
  2009年   17篇
  2008年   18篇
  2007年   43篇
  2006年   30篇
  2005年   17篇
  2004年   20篇
  2003年   21篇
  2002年   20篇
  2001年   22篇
  2000年   24篇
  1999年   8篇
  1998年   8篇
  1996年   2篇
  1995年   2篇
  1994年   5篇
  1993年   5篇
  1992年   8篇
  1991年   11篇
  1990年   9篇
  1989年   8篇
  1988年   13篇
  1987年   6篇
  1986年   4篇
  1985年   8篇
  1984年   7篇
  1983年   10篇
  1982年   2篇
  1981年   4篇
  1980年   1篇
  1978年   1篇
  1974年   1篇
  1972年   1篇
  1971年   1篇
  1969年   1篇
排序方式: 共有549条查询结果,搜索用时 15 毫秒
541.
Traditional exposure for total shoulder arthroplasty (TSA) is a deltopectoral incision of approximately 17 cm. Recent literature suggests that minimally invasive surgery for knee and hip arthroplasties may be successful in reducing perioperative morbidity and improving patient satisfaction. In the study reported here, we evaluated a minimal-incision approach to TSA. Using 10 fresh-frozen cadaveric shoulders, we performed TSAs through a 6-cm incision originating at the center of the coracoid process and extending distally along the deltopectoral interval. Soft-tissue releases, humeral osteotomy, and glenoid resurfacing were performed in all 10 cadaver shoulders using standard TSA retractors and guides. No skin or soft-tissue complications were observed. We conclude that it is technically possible to perform TSA through an appropriately placed minimal (6-cm) incision.  相似文献   
542.
543.
Tonini M  Vigneri S  Neri M  Cuomo R  Savarino V  Pace F 《Digestion》2007,76(3-4):171-178
Proton pump inhibitors (PPIs) are antisecretory agents that are widely used in the short- and long-term management of gastroesophageal reflux disease (GERD) to relieve symptoms, heal esophagitis, and prevent complications, such as strictures and Barrett's esophagus. The total healthcare costs of GERD are high, especially for maintenance treatment. Therefore, the choice of cost-effective therapeutic options is an ineluctable challenge for public health authorities, third-party payers, and patients. In some European Union countries, a recent trend of public health authorities is to promote the choice of less expensive PPIs, regardless of their antisecretory potency--this in spite of the evidence that newer PPIs provide superior symptom relief and esophageal erosion healing compared to earlier drugs. Several large clinical trials have demonstrated the superiority of esomeprazole over other PPIs at standard doses for both initial and continuous maintenance therapy in patients with moderate/severe erosive esophagitis. The non-erosive GERD poses a major challenge as this condition appears more frequently to be less responsive to PPIs. The use of PPIs with the strongest antisecretory properties might reveal to be more adequate and cost-effective, particularly for this indication.  相似文献   
544.
545.
Studies dealing with the outcomes of developmental carbon monoxide (CO) exposure on myelination in rat offspring are reviewed. Prenatal CO exposure from gestational day 0 to gestational day 20 impairs myelin deposition around peripheral axons resulting in a significant hypomyelination in juvenile and adult rats. Myelin protein patterns analyzed by SDS-polyacrylamide gel electrophoresis and lipid patterns analyzed by the HPTLC method are not altered in both peripheral and central nervous systems of CO-exposed offspring. Interestingly, when sphingomyelin is extracted and purified, the derivatization by OPA reagent and analysis by reversed-phase HPLC reveal a significant increase in sphingosine levels in peripheral nervous system but not in central nervous system of CO-exposed rats. The above morphological and biochemical alterations are not accompanied by motor disabilities.  相似文献   
546.
547.
IntroductionIn the past decade, there has been an increasing amount of published information regarding erectile dysfunction (ED) and heart failure (HF) in economically advanced, westernized populations. However, there is a paucity of data regarding ED and HF in developing countries. The country of Georgia is categorized as a lower-middle-income country (LMIC) with an emerging and developing economy.AimTo examine the prevalence of ED in patients with HF from a developing and LMIC and assess the association with depression.MethodsWe conducted an observational, cross-sectional study that included male patients 18 years of age or older with an ejection fraction ≤40% by echocardiogram in a heart failure disease management program in Tbilisi, Georgia. The Sexual Health Inventory for Men (SHIM) survey was used to categorize men according to degree of ED. Baseline clinical characteristics known to be associated with ED, such as New York Heart Association functional classification, were also documented.Main Outcome MeasuresThe SHIM survey and the nine-question Patient Health Questionnaire.ResultsThe prevalence of ED was found to be 61.7%. Patients with ED were generally older, had more peripheral vascular disease, and had greater levels of depression than those without ED.ConclusionsThere is a high prevalence of ED in patients with HF living in Tbilisi, Georgia. In comparison to previously published data on HF populations, our Georgian population showed lesser degrees of ED. More research is needed to better explain the causality for lower prevalence of ED, but explanations may include lower degrees of diabetes and aspects of treatment such as beta-blocker medication. Health care providers in LMICs should screen all of their male HF patients for ED and provide appropriate therapy. Hebert K, Anand J, Trahan P, Delgado M, Greene J, Julian E, Cuomo J, Gogichaishvili I, Nozadze N, Dias A, and Arcement L. Prevalence of erectile dysfunction in systolic heart failure patients in a developing country: Tbilisi, Georgia, Eastern Europe.  相似文献   
548.
549.
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