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   9897篇
  免费   471篇
  国内免费   99篇
耳鼻咽喉   70篇
儿科学   234篇
妇产科学   306篇
基础医学   982篇
口腔科学   177篇
临床医学   833篇
内科学   2585篇
皮肤病学   86篇
神经病学   1000篇
特种医学   476篇
外科学   1653篇
综合类   22篇
一般理论   3篇
预防医学   394篇
眼科学   174篇
药学   602篇
中国医学   22篇
肿瘤学   848篇
  2023年   53篇
  2022年   166篇
  2021年   283篇
  2020年   146篇
  2019年   250篇
  2018年   310篇
  2017年   233篇
  2016年   258篇
  2015年   288篇
  2014年   397篇
  2013年   490篇
  2012年   779篇
  2011年   750篇
  2010年   394篇
  2009年   412篇
  2008年   608篇
  2007年   585篇
  2006年   596篇
  2005年   604篇
  2004年   539篇
  2003年   514篇
  2002年   457篇
  2001年   118篇
  2000年   105篇
  1999年   94篇
  1998年   92篇
  1997年   88篇
  1996年   78篇
  1995年   58篇
  1994年   56篇
  1993年   35篇
  1992年   71篇
  1991年   56篇
  1990年   59篇
  1989年   39篇
  1988年   42篇
  1987年   37篇
  1986年   38篇
  1985年   36篇
  1984年   25篇
  1983年   26篇
  1982年   29篇
  1981年   27篇
  1980年   21篇
  1979年   9篇
  1978年   14篇
  1977年   12篇
  1973年   10篇
  1972年   14篇
  1968年   8篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.

Background

Total knee arthroplasty is a treatment option for debilitating arthritis. In the postoperative period, patients experience moderate to severe pain affecting the rehabilitation, hospital stay, and patient satisfaction. This study aims at utilizing current best evidence to determine whether adductor canal block (ACB) or periarticular injection (PAI) is a better modality for managing short-term postoperative pain and opioid consumption.

Methods

Embase, MEDLINE, HealthStar, Emcare, and PubMed were searched for randomized controlled trials from 1946 to August 2018, for literature addressing the comparison of ACB and PAI for pain management in the setting of total knee arthroplasty. A systematic review and meta-analysis were performed.

Results

Six studies were included in our meta-analysis. When examining the combined visual analog scale (VAS) pain values for each group, analysis demonstrated greater reduction in scores for the PAI group, and the difference was statistically significant (P = .001). When comparing the VAS scores of subgroups analyzed at specific periods in time, there was a trend toward lower VAS scores in subgroups analyzed at 24 hours and 48 hours postoperatively (at rest and at movement) in the PAI group. Overall opioid consumption was lower in the PAI group, with demonstrated statistical significance (P = .03). When comparing the postoperative subgroups, there was a trend toward decreased opioid use in the PAI group, with 13.25% less opioid use at 48 hours and 9.5% less opioid use at 24 hours.

Conclusion

PAI could significantly improve postoperative pain and opioid consumption when compared with ACB. Additional, high-quality studies are required to further address this topic.  相似文献   
3.
4.
5.
Idiopathic Headache as a Possible Risk Factor for Phantom Tooth Pain   总被引:1,自引:0,他引:1  
Following tooth pulp extirpation, some subjects suffer from persistent pain which affects edentate sites in absence of any local pathology. As regards this peculiar pain, called phantom tooth pain (PTP), what is puzzling is the fact there is a low prevalence of PTP in a very large population showing identical conditions of tooth pulp extirpation. The present investigation indicates that PTP mainly affects migraine (M) and cluster headache (CH) sufferers, whereas it does not affect subjects who have a negative personal and family history for idiopathic headache (IH). These results circumscribe the presence of PTP to a specific section of the population. The present results, besides indicating that PTP may be the result of a peculiar neuronal predisposition relating to IH pathogenesis, suggests some practical therapeutic hints. In fact, successful anti- M and anti-CH prophylactic treatment greatly improve PTP syndrome.  相似文献   
6.
7.
Hum Psychopharmacol 2007; 22 : 121–128. DOI: 10.1002/hup.836 It has come to our attention that there was an error contained in the above article within the abstracts heading relating to Methods. The article stated that: ‘A literature search was conducted within PsychoINFO’. This should have been published as: ‘A literature search was conducted within PsycINFO’. We apologise for this anomaly.  相似文献   
8.
9.
Tolerance of ocular iontophoresis in healthy volunteers.   总被引:4,自引:0,他引:4  
To evaluate ocular tolerance, healthy volunteers were iontophoresed transclerally using novel OcuPhor trade mark hydrogel drug delivery applicators filled with balanced salt solution. In this three-period crossover study in 24 male and female subjects, 16 subjects received 0 mA and two of the following DC currents: 0.1, 0.5., 1.0, 2.0, 3.0, or 4.0 mA for 20 min; 6 subjects received 3 mA for 20 min and 1.5 mA for 40 min (both equivalent to 60 mAmin total charge). Safety and tolerance were determined by subjective VAS and objective ophthalmic assessments. Subjects were evaluated before and up to 22 hr after dosing. The applicators were well-tolerated and no clinically significant changes in symptomology or in ophthalmic assessments were seen following exposure to 0-3.0 mA for 20 min or 1.5 mA for 40 min. At 4.0 mA 2 of 4 subjects reported a burning sensation under the applicator during dosing which resolved by 22 hr post-dose; superficial changes in fluorescein staining were observed at 1 hr, but not at 22 hr. The OcuPhor trade mark system has promise for noninvasive drug delivery to the eye.  相似文献   
10.
Septic arthritis of the temporomandibular joint (TMJ) is infrequently reported. We present a case of septic arthritis of the TMJ following the extraction of the left upper second molar that occurred 1 week before beginning of symptoms. No evident predisposing factors were detected. Arthroscopic diagnosis of septic arthritis, lysis and lavage, and capsular stretch were performed. Cultures taken from the TMJ space grew Streptococcus sp. After 1 month of antimicrobial therapy the patient was asymptomatic and mandibular function was normal. Literature related to septic arthritis of TMJ and its treatment was reviewed. Different surgical procedures are available to treat this condition. Arthroscopy should be preferred as initial treatment on account of the possibility of drainage and accurate lavage under direct visualization of joint space, at the same time allowing confirmation of diagnostic hypotheses. Improving joint mobility with lysis of adhesions and capsular stretch in an early stage of disease may be helpful in stopping the fibrosis process.  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