全文获取类型
收费全文 | 39336篇 |
免费 | 2789篇 |
国内免费 | 2241篇 |
专业分类
耳鼻咽喉 | 2372篇 |
儿科学 | 434篇 |
妇产科学 | 471篇 |
基础医学 | 5079篇 |
口腔科学 | 1044篇 |
临床医学 | 3165篇 |
内科学 | 1738篇 |
皮肤病学 | 243篇 |
神经病学 | 8672篇 |
特种医学 | 1162篇 |
外国民族医学 | 3篇 |
外科学 | 7203篇 |
综合类 | 5395篇 |
现状与发展 | 1篇 |
预防医学 | 766篇 |
眼科学 | 2513篇 |
药学 | 1944篇 |
24篇 | |
中国医学 | 1033篇 |
肿瘤学 | 1104篇 |
出版年
2024年 | 76篇 |
2023年 | 521篇 |
2022年 | 954篇 |
2021年 | 1307篇 |
2020年 | 1399篇 |
2019年 | 1187篇 |
2018年 | 1145篇 |
2017年 | 1467篇 |
2016年 | 1489篇 |
2015年 | 1416篇 |
2014年 | 2428篇 |
2013年 | 2360篇 |
2012年 | 1980篇 |
2011年 | 2178篇 |
2010年 | 1916篇 |
2009年 | 1719篇 |
2008年 | 1879篇 |
2007年 | 1878篇 |
2006年 | 1761篇 |
2005年 | 1448篇 |
2004年 | 1347篇 |
2003年 | 1258篇 |
2002年 | 1113篇 |
2001年 | 1014篇 |
2000年 | 834篇 |
1999年 | 798篇 |
1998年 | 769篇 |
1997年 | 695篇 |
1996年 | 587篇 |
1995年 | 526篇 |
1994年 | 456篇 |
1993年 | 420篇 |
1992年 | 437篇 |
1991年 | 360篇 |
1990年 | 373篇 |
1989年 | 292篇 |
1988年 | 247篇 |
1987年 | 260篇 |
1986年 | 243篇 |
1985年 | 332篇 |
1984年 | 290篇 |
1983年 | 188篇 |
1982年 | 211篇 |
1981年 | 194篇 |
1980年 | 168篇 |
1979年 | 121篇 |
1978年 | 86篇 |
1977年 | 75篇 |
1976年 | 57篇 |
1975年 | 32篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
《The Journal of arthroplasty》2022,37(10):1922-1927.e2
BackgroundRegional nerve blocks may be used as a component of a multimodal analgesic protocol to manage postoperative pain after primary total hip arthroplasty (THA). The purpose of our study was to evaluate the efficacy and safety of regional nerve blocks after THA in support of the combined clinical practice guidelines of the American Association of Hip and Knee Surgeons, American Academy of Orthopaedic Surgeons, Hip Society, Knee Society, and American Society of Regional Anesthesia and Pain Management.MethodsWe searched MEDLINE, Embase, and the Cochrane Central Register of Controlled Trials for studies published prior to March 24, 2020 on fascia iliaca, lumbar plexus, and quadratus lumborum blocks in primary THA. All included studies underwent qualitative and quantitative homogeneity testing followed by a systematic review and direct comparison meta-analysis to assess the efficacy and safety of the regional nerve blocks.ResultsAn initial critical appraisal of 3,382 publications yielded 11 publications representing the best available evidence for an analysis. Fascia iliaca, lumbar plexus, and quadratus lumborum blocks demonstrate the ability to reduce postoperative pain and opioid consumption. Among the available comparisons, no difference was noted between a regional nerve block or local periarticular anesthetic infiltration regarding postoperative pain and opioid consumption.ConclusionLocal periarticular anesthetic infiltration should be considered prior to a regional nerve block due to concerns over the safety and cost of regional nerve blocks. If a regional nerve block is used in primary THA, a fascia iliaca block is preferred over other blocks due to the differences in technical demands and risks associated with the alternative regional nerve blocks. 相似文献
23.
24.
25.
Peter Marhofer Malachy Columb Phil M. Hopkins Manfred Greher Daniela Marhofer Max R. Levi Bienzle Markus Zeitlinger 《British journal of anaesthesia》2019,122(4):525-531
Background
The efficacy of dexamethasone in extending the duration of local anaesthetic block is uncertain. In a randomised controlled triple blind crossover study in volunteers, we tested the hypothesis that neither i.v. nor perineurally administered dexamethasone prolongs the sensory block achieved with ropivacaine.Methods
Ultrasound-guided ulnar nerve blocks (ropivacaine 0.75% wt/vol, 3 ml, with saline 1 ml with or without dexamethasone 4 mg) were performed on three occasions in 24 male volunteers along with an i.v. injection of saline 1 ml with or without dexamethasone 4 mg. The combinations of saline and dexamethasone were as follows: control group, perineural and i.v. saline; perineural group, perineural dexamethasone and i.v. saline; i.v. group, perineural saline and i.v. dexamethasone. Sensory block was measured using a VAS in response to pinprick testing. The duration of sensory block was the primary outcome and time to onset of sensory block the secondary outcome.Results
All 24 subjects completed the trial. The median [inter-quartile range (IQR)] duration of sensory block was 6.87 (5.85–7.62) h in the control group, 7.37 (5.78–7.93) h in the perineural group and 7.37 (6.10–7.97) h in the i.v. group (P=0.61). There was also no significant difference in block onset time between the three groups.Conclusion
Dexamethasone 4 mg has no clinically relevant effect on the duration of sensory block provided by ropivacaine applied to the ulnar nerve.Clinical trial registration
DRKS, 00014604; EudraCT, 2018-001221-98. 相似文献26.
Exercise induced dyspnoea (EID) is a common manifestation in children and adolescents. Although EID is commonly attributed to exercise induced bronchoconstriction, several conditions other than asthma can cause EID in otherwise healthy children and adolescents. Cardiopulmonary exercise testing (CPET) offers a non-invasive comprehensive assessment of the cardiovascular, ventilatory and metabolic responses to exercise and is a powerful diagnostic and prognostic tool. CPET is a reproducible, non-invasive form of testing that allows for comparison against age- and gender-specific norms. CPET can assess the child’s exercise capacity, determine the limiting factors associated with this, and be used to prescribe individualised interventions. EID can occur due to asthma, exercise induced laryngeal obstruction, breathing pattern disorders, chest wall restriction and cardiovascular pathology among other causes. Differentiating between these varied causes is important if effective therapy is to be initiated and quality of life improved in subjects with EID. 相似文献
27.
28.
29.
目的探讨腮腺切除术中应用沿面神经总干顺行解剖面神经的治疗效果及安全性。方法选取我院2016年2月至2019年3月收治的60例择期行腮腺切除术的患者,随机分为观察组与对照组各30例。对照组沿面神经总干逆行解剖面神经,观察组沿面神经总干顺行解剖面神经,观察两组患者术后1个月面神经功能及术后并发症发生情况。结果术后1个月,两组患者的面神经功能分级比较无统计学差异(P>0.05);观察组的术后并发症发生率为10.00%,明显低于对照组的33.33%(P <0.05)。结论临床行腮腺切除术中,沿面神经总干顺行解剖面神经可降低术后并发症发生率,值得推广。 相似文献
30.