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   619篇
  免费   42篇
耳鼻咽喉   19篇
儿科学   41篇
妇产科学   11篇
基础医学   33篇
口腔科学   24篇
临床医学   45篇
内科学   122篇
皮肤病学   6篇
神经病学   51篇
特种医学   11篇
外科学   169篇
综合类   9篇
预防医学   20篇
眼科学   14篇
药学   44篇
中国医学   6篇
肿瘤学   36篇
  2023年   6篇
  2022年   17篇
  2021年   27篇
  2020年   16篇
  2019年   22篇
  2018年   25篇
  2017年   26篇
  2016年   24篇
  2015年   29篇
  2014年   43篇
  2013年   43篇
  2012年   77篇
  2011年   102篇
  2010年   27篇
  2009年   15篇
  2008年   26篇
  2007年   25篇
  2006年   25篇
  2005年   18篇
  2004年   18篇
  2003年   19篇
  2002年   9篇
  2001年   5篇
  2000年   2篇
  1999年   7篇
  1998年   6篇
  1997年   2篇
排序方式: 共有661条查询结果,搜索用时 15 毫秒
41.
Background: Optimum pain relief following thoracotomy is essential for patient comfort and to reduce the incidence of postoperative pulmonary complications. Methods: A randomized clinical trial was conducted on 90 patients scheduled for pulmonary resection. The patients were randomly divided into three groups. Group 1 received 0.125% bupivicaine with fentanyl 10μg.ml−1, Group 2 received 0.25% bupivicaine with fentanyl 10μg.ml−1 and Group 3 received only fentanyl 10μg.ml−1 in a calculated dose as a continuous thoracic epidural infusion. Adequacy of anglesia was assessed at rest and during movement over 24 hours. Analgesic efficacy was assessed using a visual analogue score and an observer verbal ranking scale. Results: Pain scores were significantly higher in Group 3 during the assessment period. (p<0.01) as compared to the other groups. The use of intraoperative vasopressors was significantly higher (p<0.05) in Group 2 as compared to the other groups. No neurological complications were encountered in any of the study groups. Conclusion: We conclude that in the early postoperative period, the use of 0.125% bupivicaine improves fentanyl epidural analgesia in patients undergoing lung resection.  相似文献   
42.
The surgical management of sinusitis was revolutionized worldwide with the advent of the rigid Hopkins rod nasal endoscopes three decades ago. The traditional Messerklinger technique, was thus propagated worldwide by Prof. Stammberger, from the University of Graz in Austria and has come into vogue as functional endoscopic sinus surgery (FESS). The principal aim behind this procedure was the maximal preservation of the nasal mucosal integrity, while providing optimal disease clearance. Today, the introduction of a new technological innovation called ‘balloon sinuplasty’, has taken the field of sinus surgery a step further. This new technology is very similar to the principles of balloon angioplasty and today, this system has added an efficient, non-invasive tool in the armamentarium of the innovative endoscopic rhinologist. This FDA approved technique, in recent times has provided excellent results in various centers across the western world. We share our first surgical experience with the introduction of this cutting-edge technology in India.  相似文献   
43.
44.
Tarsal cuneiform dislocation in association with Lisfranc fracture-dislocation is a rare pedal injury. In this report, we describe the case of a patient who sustained a dorsal dislocation of the intermediate cuneiform in association with tarsometatarsal fracture-dislocation following traumatic axial loading and torsion of his foot. A satisfactory outcome was achieved by treating the injury by means of closed reduction and percutaneous Kirschner wire fixation. ACFAS Level of Clinical Evidence: 4.  相似文献   
45.
A fatal case of primary amebic meningoencephalitis (PAM) in a 5-month-old infant is described. The disease may have been contracted during bathing. The source of water was from an artificial well. The clinical presentation, the isolation of the ameba from the cerebrospinal fluid, the poor response to amphotericin B, and the ultimate fatal outcome are all consistent with the diagnosis of PAM. On the basis of its ability to grow at temperatures above 30 degrees C, the morphology of the trophozoite, and the presence of flagellate forms, the ameba was identified as Naegleria fowleri. Pathogenic N. fowleri amebae were recovered from samples of water from the well. To our knowledge this case represents the second case of PAM in an infant in the absence of the history of swimming.  相似文献   
46.
47.

Background

The Cancer and Leukemia Group B 9,343 demonstrated that postoperative radiation can be safely omitted in women ≥70 years who underwent breast-conserving therapy for clinical stage I (T1N0M0) estrogen receptor positive breast cancer treated with antihormonal therapy. Whether such results are observed in real-world population is unknown. In this hospital-based data, we report the survival outcomes of patients who received adjuvant radiation therapy versus those who did not.

Methods

Using the National Cancer Data Base, we evaluated a cohort of 47,358 women with newly diagnosed breast cancer between 2004 and 2011 who underwent a lumpectomy and antihormonal therapy with the following criteria: age ≥70 years, clinical stage I, estrogen receptor positive, and negative margins. Patients were stratified into 2 groups: (1) radiation therapy and (2) no radiation therapy. Propensity score matching was used to compensate for differences in demographic and clinical characteristics of the patients. Univariate and multivariable survival analysis were employed to determine factors associated with overall survival.

Results

The 5-year overall survival after propensity score matching was 87.2% for radiation therapy and 79.4% for no radiation therapy (P?<?.0001). The median survival time was 113.7 months for radiation therapy and 105.2 months for no radiation therapy. After adjusting for sociodemographic and clinical factors, the risk of overall deaths was significantly higher for those not receiving radiation therapy (hazard ratio?=?1.66; 95% confidence interval, 1.54–1.79). Other significant adjusted predictors (P?<?.05) of poor overall survival were, advanced age, comprehensive community cancer program, facility location, poorly differentiated tumor, and high comorbidity index.

Conclusion

Patients who received radiation therapy had better survival outcomes than those who did not, revealing discordance between results of randomized trials and real-world setting.  相似文献   
48.
49.
50.
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