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   1117篇
  免费   69篇
  国内免费   48篇
耳鼻咽喉   3篇
儿科学   82篇
妇产科学   54篇
基础医学   114篇
口腔科学   38篇
临床医学   118篇
内科学   277篇
皮肤病学   12篇
神经病学   85篇
特种医学   125篇
外科学   76篇
综合类   25篇
一般理论   12篇
预防医学   105篇
眼科学   7篇
药学   66篇
  1篇
肿瘤学   34篇
  2023年   5篇
  2022年   6篇
  2021年   5篇
  2019年   10篇
  2018年   15篇
  2017年   14篇
  2016年   12篇
  2015年   15篇
  2014年   25篇
  2013年   48篇
  2012年   22篇
  2011年   25篇
  2010年   25篇
  2009年   29篇
  2008年   30篇
  2007年   60篇
  2006年   32篇
  2005年   29篇
  2004年   13篇
  2003年   31篇
  2002年   27篇
  2001年   28篇
  2000年   27篇
  1999年   24篇
  1998年   52篇
  1997年   59篇
  1996年   63篇
  1995年   50篇
  1994年   35篇
  1993年   34篇
  1992年   13篇
  1991年   29篇
  1990年   27篇
  1989年   39篇
  1988年   43篇
  1987年   42篇
  1986年   44篇
  1985年   37篇
  1984年   9篇
  1983年   14篇
  1982年   11篇
  1981年   10篇
  1980年   15篇
  1979年   3篇
  1978年   7篇
  1977年   10篇
  1975年   8篇
  1972年   3篇
  1971年   3篇
  1965年   2篇
排序方式: 共有1234条查询结果,搜索用时 128 毫秒
1.
2.
3.
Amiodarone is an effective agent for all types of supraventricular tachyarrhythmias regardless of mechanism and may, in fact, control a high percentage of supraventricular tachyarrhythmias refractory to conventional antiarrhythmic agents. However, its toxicity should temper enthusiasm for the use of the medication in non-life-threatening arrhythmias. As always, when recommending specific therapies the potential benefit should be weighed in light of the related risk. In patients with life disordering, drug-refractory atrial fibrillation, it seems reasonable to attempt control with amiodarone. Likewise in patients with ectopic atrial tachycardias refractory to conventional agents, this seems reasonable as well. Other and better therapies are available for patients with life-threatening arrhythmias associated with the Wolff-Parkinson-White syndrome. While amiodarone is moderately effective in these patients, the advent of improved surgical techniques and the relatively low risk of an operation make surgery the treatment of choice. The role of IV amiodarone, acutely, in the treatment of supraventricular tachyarrhythmias remains to be defined.  相似文献   
4.
A study of intravenous (i.v.) cannula usage for medical emergencies admitted to hospitals in the Newham Health District was undertaken during two defined periods (24 and 35 days). Almost half the cannulas inserted (47%) were not flushed following an initial bolus injection of heparinized saline. The duration that cannulas remained in a vein ranged from 24 hours to 8 days (median 2 days) and inflammation around the cannula site was related to the length of time since insertion but unrelated to whether the cannula was flushed regularly or to the type of fluid used. Our findings indicate a substantial wastage of i.v. cannulas due to difficulties with insertion and suggest that isotonic saline, without heparin, is effective in maintaining cannula patency for 48 hours. It is concluded that these findings are not unique to the Newham Health District and worthwhile financial savings should be achieved throughout the NHS if clinicians reconsider the indications and use of i.v. cannulas for their patients.  相似文献   
5.

Background  

Shoulder disorders are a common health problem in western societies. Several treatment protocols have been developed for the clinical management of persons with shoulder pain. However available evidence does not support any protocol as being superior over others. Systematic reviews provide some evidence that certain physical therapy interventions (i.e. supervised exercises and mobilisation) are effective in particular shoulder disorders (i.e. rotator cuff disorders, mixed shoulder disorders and adhesive capsulitis), but there is an ongoing need for high quality trials of physical therapy interventions. Usually, physical therapy consists of active exercises intended to strengthen the shoulder muscles as stabilizers of the glenohumeral joint or perform mobilisations to improve restricted mobility of the glenohumeral or adjacent joints (shoulder girdle). It is generally accepted that a-traumatic shoulder problems are the result of impingement of the subacromial structures, such as the bursa or rotator cuff tendons. Myofascial trigger points (MTrPs) in shoulder muscles may also lead to a complex of symptoms that are often seen in patients diagnosed with subacromial impingement or rotator cuff tendinopathy. Little is known about the treatment of MTrPs in patients with shoulder disorders.  相似文献   
6.
7.
8.
9.
10.
p = 0.82), operative difficulty on a 1 to 10 scale (5.2 ± 1.5 versus 4.6 ± 1.6, respectively; p = 0.177), and complication rate (11% and 17%, respectively; p = 0.19). Significantly lower analgesia requirements were noted in the MC group: 27.5 ± 14.6 mg of morphine sulfate compared to 44.5 ± 13.2 mg in the CC group ( p < 0.001). In addition, the duration of hospital stay was significantly shorter for MC patients (3.1 ± 1.0 days) than in CC patients (4.7 ± 1.2 days) ( p < 0.001). Twenty-two patients (73.3%) in the MC group were reported to return to normal daily activities 2 weeks after the operation, compared to only 12 (40%) in the CC group ( p = 0.0028). MC is safe and applicable as an emergency procedure for acute cholecystitis. It is superior to CC in terms of convalescence and cosmesis. The results of MC in the setting of acute cholecystitis compare favorably with the published results of laparoscopic cholecystectomy.  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