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   1797篇
  免费   310篇
  国内免费   39篇
耳鼻咽喉   14篇
儿科学   101篇
妇产科学   20篇
基础医学   113篇
口腔科学   26篇
临床医学   313篇
内科学   596篇
皮肤病学   60篇
神经病学   193篇
特种医学   281篇
外科学   189篇
综合类   32篇
预防医学   73篇
眼科学   19篇
药学   60篇
中国医学   1篇
肿瘤学   55篇
  2023年   52篇
  2022年   13篇
  2021年   28篇
  2020年   90篇
  2019年   12篇
  2018年   88篇
  2017年   69篇
  2016年   70篇
  2015年   62篇
  2014年   95篇
  2013年   120篇
  2012年   46篇
  2011年   37篇
  2010年   79篇
  2009年   108篇
  2008年   41篇
  2007年   48篇
  2006年   45篇
  2005年   26篇
  2004年   13篇
  2003年   14篇
  2002年   18篇
  2001年   30篇
  2000年   21篇
  1999年   27篇
  1998年   85篇
  1997年   95篇
  1996年   79篇
  1995年   68篇
  1994年   49篇
  1993年   52篇
  1992年   30篇
  1991年   17篇
  1990年   26篇
  1989年   54篇
  1988年   47篇
  1987年   30篇
  1986年   21篇
  1985年   27篇
  1984年   25篇
  1983年   16篇
  1982年   19篇
  1981年   15篇
  1980年   17篇
  1979年   10篇
  1978年   14篇
  1977年   10篇
  1976年   15篇
  1975年   10篇
  1971年   9篇
排序方式: 共有2146条查询结果,搜索用时 15 毫秒
991.
We describe an adult patient with right coronary artery to right atrium fistula, which was treated percutaneously 10 years earlier. His coronary angiogram done presently demonstrated no residual fistula, but there was persistence of aneurysmally dilated proximal right coronary artery segment that gave rise to many unanswered questions regarding management of coronary artery fistulas. We discuss the short‐ and long‐term therapeutic dilemmas in the management of coronary artery fistula.  相似文献   
992.
993.
We report a 21-year-old farmer with a 4-year history of a nodular plaque with fistulas and induration of adjacent skin. The lesion had been treated surgically at another hospital, but recurred 2 years later.
Black, charcoal-like grains were observed draining through the fistulas. A biopsy specimen showed brown grains with filaments in an abscess surrounded by macrophages, giant cells, and lymphocytes. Culture demonstrated small white colonies of Madurella mycetomatis . The patient was treated with itraconazole for 6 months, followed by surgery. TNP was initiated in the immediate post-operative period, and copious granulation tissue was observed within 1 week. Autologous skin grafting was performed, and itraconazole was continued for an additional 3 months. Although necrosis of the graft ensued, the functional result was acceptable. The patient appeared free of disease at 18 months of follow-up.
Eumycotic mycetoma is an infectious and inflammatory process that occurs after traumatic inoculation of fungi through the skin. Surgery is the treatment of choice, but successful reconstruction may be challenging and recurrence is common. Topical negative pressure (TNP) promotes the formation of granulation tissue, which facilitates closure of deep wounds and chronic ulcers. This case illustrates that eumycotic mycetoma is difficult to treat. Whether TNP contributed to the successful outcome cannot be proven but, given the generally poor response of eumycetoma to therapy, we suggest that the role of TNP in the management of this disease merits attention.  相似文献   
994.
Background. Relatively little evidence exists to guide the decision pathway regarding thoracic metastasectomy for thyroid malignancy.

Methods. Single-institution 10-year review.

Results. Sixteen patients had surgical treatment for intrathoracic metastatic thyroid malignancy: 12 men and 4 women, mean age 43.7 years (range 19 to 77). Histopathologic type was papillary in 6 cases, follicular in 4, Hürthle cell in 3, and medullary in 3. Indication was either “bulky” disease (8 patients) or poor response to radiotherapy (8 patients). We performed 11 sternotomies and five thoracotomies. Operative mortality was 6.25%. Operative morbidity was 6.25%. Mean survival was 39.5 months (0 to 144). Nine patients died during follow-up (mean survival of 41.2 months). Six patients survived, 4 free of disease (mean survival 70 months) and 2 with further relapse (mean survival 17 months). Five-year survival was 32.5%.

Conclusions. The cohort studied is one of the largest in the literature on the topic. Surgical treatment achieved a reasonable survival in a small subgroup of patients where radiotherapy had failed or was deemed inappropriate because of the size or location of the tumor. Further follow-up and more observations will be required for evaluating these preliminary findings.  相似文献   

995.
This study assessed the prognostic value of ambulatory vs. clinic blood pressure measurement in 688 hypertensives who had undergone pretreatment 24-hour intra-arterial ambulatory blood pressure monitoring. A total of 157 first events were recorded over a follow-up period of 9.2±4.4 years. Ambulatory systolic or diastolic blood pressure parameters (whether 24-hour mean, daytime mean, or nighttime mean) or ambulatory pulse pressure provided independent prognostic information in conjunction with clinical variables. The most predictive models contained the ambulatory systolic blood pressure parameters. Age, male gender, South Asian origin, diabetes mellitus, and previous cardiovascular disease were additional independent predictors of events. In a subgroup of 295 uncomplicated patients, 24-hour ambulatory pulse pressure was an independent predictor of left ventricular mass index and maximal carotid intima-media thickness. Baseline clinic blood pressure parameters did not provide independent information for the prediction of events or target organ damage. Therefore, in this study, ambulatory blood pressure proved to be superior to clinic measurement for cardiovascular risk stratification. However, the routine use of ambulatory blood pressure monitoring is not currently recommended, mainly because of a lack of outcome trials based on the treatment of ambulatory blood pressure levels.  相似文献   
996.
997.
998.
999.
Transcatheter closure of patent ductus arteriosus (PDA) with various devices has been evaluated worldwide and in selected cases can be performed successfully, thus avoiding the morbidity associated with surgical closure. Traditionally, left lateral projection is adopted for angiographic visualization of the PDA. However, rarely due to anatomical variations of the ductus, it may be difficult to properly visualize and deploy device in above‐said traditional view. In such cases, right anterior oblique projection may be used for proper visualization. © 2012 Wiley Periodicals, Inc.  相似文献   
1000.
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