收费全文 | 487617篇 |
免费 | 49415篇 |
国内免费 | 2298篇 |
耳鼻咽喉 | 7694篇 |
儿科学 | 14700篇 |
妇产科学 | 10928篇 |
基础医学 | 54810篇 |
口腔科学 | 13807篇 |
临床医学 | 60574篇 |
内科学 | 101305篇 |
皮肤病学 | 10825篇 |
神经病学 | 49501篇 |
特种医学 | 21477篇 |
外国民族医学 | 37篇 |
外科学 | 80768篇 |
综合类 | 3692篇 |
现状与发展 | 41篇 |
一般理论 | 219篇 |
预防医学 | 37279篇 |
眼科学 | 11970篇 |
药学 | 27786篇 |
1篇 | |
中国医学 | 656篇 |
肿瘤学 | 31260篇 |
2023年 | 6648篇 |
2022年 | 3624篇 |
2021年 | 8895篇 |
2020年 | 8917篇 |
2019年 | 7999篇 |
2018年 | 14983篇 |
2017年 | 13404篇 |
2016年 | 15169篇 |
2015年 | 16481篇 |
2014年 | 21488篇 |
2013年 | 27497篇 |
2012年 | 28229篇 |
2011年 | 28246篇 |
2010年 | 20504篇 |
2009年 | 21124篇 |
2008年 | 26088篇 |
2007年 | 26714篇 |
2006年 | 27429篇 |
2005年 | 26385篇 |
2004年 | 24489篇 |
2003年 | 22817篇 |
2002年 | 21979篇 |
2001年 | 9879篇 |
2000年 | 8836篇 |
1999年 | 9058篇 |
1998年 | 6312篇 |
1997年 | 5302篇 |
1996年 | 4755篇 |
1995年 | 4158篇 |
1994年 | 3285篇 |
1993年 | 3045篇 |
1992年 | 4106篇 |
1991年 | 3861篇 |
1990年 | 3596篇 |
1989年 | 3396篇 |
1988年 | 3042篇 |
1987年 | 2859篇 |
1986年 | 2717篇 |
1985年 | 2634篇 |
1984年 | 2450篇 |
1983年 | 2128篇 |
1982年 | 1955篇 |
1981年 | 1812篇 |
1980年 | 1589篇 |
1979年 | 1930篇 |
1978年 | 1659篇 |
1977年 | 1439篇 |
1975年 | 1467篇 |
1974年 | 1509篇 |
1973年 | 1346篇 |
Methods: Data sources consisted of searches through MEDLINE, CINAHL, PSYCHINFO, Cochrane Library, and Emergency Medicine Abstracts and a manual search of references. Articles were included if they reported a performance improvement intervention targeting patient satisfaction in the ED setting. Articles on studies not conducted in the United States or that failed to provide enough details to allow critical evaluation of the study were excluded. Two authors used structured evaluation criteria to independently review each retained study.
Results: Nineteen articles met all selection criteria. Three studies found varying levels of support for multicomponent interventions, predominantly focused on implementation of clinical practice guidelines for specific presenting complaints and process redesign. Sixteen studies evaluated single-component interventions, with the following having at least one supportive study: using alternating patient assignment to provider teams rather than "zone"-based assignment, enhancing provider communication and customer service skills, incorporating information delivery interventions (e.g., pamphlets, video) that target patient expectations, using preformatted charts, and establishing ED-based observation units for specific conditions such as asthma and chest pain.
Conclusions: There is modest evidence supporting a range of performance improvement interventions for improving ED patient satisfaction. Further work is needed before specific, evidence-based recommendations can be made regarding which process changes are most effective. Recommendations are made for improving the quality of performance improvement efforts in the ED setting. 相似文献
Methods: The purpose of this study was to examine whether there is a training effect using Seldinger technique emergency cricothyroidotomy (group 1; Arndt Emergency Cricothyroidotomy Catheter Set; Cook Critical Care, Bloomington, IN) versus standard surgical cricothyroidotomy (group 2). Twenty emergency physicians performed five cricothyroidotomies with each method in a total of 200 human cadavers, comparing efficacy and safety (speed, success rate, and injuries).
Results: Seven attempts in group 1 and six in group 2 had to be aborted. Time intervals from the start of the procedure to location of the cricothyroid membrane were not significantly different between the groups. However, time to tracheal puncture (P < 0.01) and time to first ventilation (P < 0.001) were significantly longer in group 2. No time effect could be observed in both groups. The airway was accurately placed into the trachea through the cricothyroid membrane in 88.2% (82 of 93) of the cadavers in group 1 and in 84.0% (79 of 94) in group 2 (not significant). No injuries were observed in group 1, whereas there were six punctures of the thyroid vessels in group 2 (P < 0.05). 相似文献