全文获取类型
收费全文 | 1987篇 |
免费 | 112篇 |
国内免费 | 47篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 66篇 |
妇产科学 | 81篇 |
基础医学 | 233篇 |
口腔科学 | 24篇 |
临床医学 | 227篇 |
内科学 | 434篇 |
皮肤病学 | 15篇 |
神经病学 | 112篇 |
特种医学 | 333篇 |
外科学 | 212篇 |
综合类 | 20篇 |
预防医学 | 71篇 |
眼科学 | 5篇 |
药学 | 174篇 |
中国医学 | 1篇 |
肿瘤学 | 128篇 |
出版年
2021年 | 9篇 |
2020年 | 7篇 |
2019年 | 14篇 |
2018年 | 15篇 |
2017年 | 14篇 |
2016年 | 17篇 |
2015年 | 62篇 |
2014年 | 59篇 |
2013年 | 105篇 |
2012年 | 73篇 |
2011年 | 66篇 |
2010年 | 62篇 |
2009年 | 54篇 |
2008年 | 70篇 |
2007年 | 109篇 |
2006年 | 78篇 |
2005年 | 70篇 |
2004年 | 70篇 |
2003年 | 69篇 |
2002年 | 74篇 |
2001年 | 82篇 |
2000年 | 85篇 |
1999年 | 54篇 |
1998年 | 36篇 |
1997年 | 43篇 |
1996年 | 31篇 |
1995年 | 37篇 |
1994年 | 32篇 |
1993年 | 24篇 |
1992年 | 43篇 |
1991年 | 48篇 |
1990年 | 46篇 |
1989年 | 44篇 |
1988年 | 41篇 |
1987年 | 39篇 |
1986年 | 36篇 |
1985年 | 27篇 |
1984年 | 27篇 |
1983年 | 24篇 |
1982年 | 18篇 |
1981年 | 16篇 |
1980年 | 22篇 |
1979年 | 9篇 |
1977年 | 15篇 |
1976年 | 19篇 |
1975年 | 16篇 |
1974年 | 12篇 |
1971年 | 10篇 |
1969年 | 7篇 |
1947年 | 6篇 |
排序方式: 共有2146条查询结果,搜索用时 31 毫秒
1.
2.
氟喹诺酮类药物不良反应168例分析 总被引:12,自引:0,他引:12
0 引言 随着氟喹诺酮类药物在临床的广泛应用,有关其应用所致不良反应的报道也日趋增多,我们通过对1990/2003年我院氟喹诺酮类药物不良反应情况报告如下,供临床参考。 相似文献
3.
Dimmeler Stefanie; Tonn Torsten; Seeger Florian; Zeiher Andreas M. 《European heart journal》2007,28(17):2175
It obviously escaped the notion of Egeland and Brinchman thatthe protocols additionally differ with regard to the washingsteps and buffer components used in the 相似文献
4.
F Reichenberger R Voswinckel B Enke M Rutsch E El Fechtali T Schmehl H Olschewski R Schermuly N Weissmann H A Ghofrani F Grimminger E Mayer W Seeger 《The European respiratory journal》2007,30(5):922-927
For chronic thromboembolic pulmonary hypertension not amenable to pulmonary endarterectomy, effective medical therapy is desired. In an open-label uncontrolled clinical trial, 104 patients (mean +/- sem age 62 +/- 11 yrs) with inoperable chronic thromboembolic pulmonary hypertension were treated with 50 mg sildenafil t.i.d. At baseline, patients had severe pulmonary hypertension (pulmonary vascular resistance 863 +/- 38 dyn.s.cm(-5)) and a 6-min walking distance of 310 +/- 11 m. Eight patients were in World Health Organization functional class II, 76 in class III and 20 in class IV. After 3 months' treatment, there was significant haemodynamic improvement, with reduction of pulmonary vascular resistance to 759 +/- 62 dyn.s.cm(-5). The 6-min walking distance increased significantly to 361 +/- 15 m after 3 months' treatment, and to 366 +/- 18 m after 12 months' treatment. A subset of 67 patients received a single dose of 50 mg sildenafil during initial right heart catheterisation. The acute haemodynamic effect of this was not predictive of long-term outcome. In this large series of patients with inoperable chronic thromboembolic pulmonary hypertension, open-label treatment with sildenafil led to significant long-term functional improvement. The acute effect of sildenafil may not predict the long-term outcome of therapy. 相似文献
5.
6.
7.
Factors influencing women to undergo screening mammography 总被引:2,自引:0,他引:2
8.
Does routine stress-thallium cardiac scanning reduce postoperative cardiac complications? 总被引:2,自引:0,他引:2
下载免费PDF全文
![点击此处可从《Annals of surgery》网站下载免费的PDF全文](/ch/ext_images/free.gif)
J M Seeger G R Rosenthal S B Self T C Flynn M C Limacher T R Harward 《Annals of surgery》1994,219(6):654-663
OBJECTIVE: Prophylactic cardiac revascularization in patients with ischemic myocardium could reduce postoperative cardiac complications after aortic reconstruction. However, the effectiveness of this approach has not been documented. SUMMARY BACKGROUND DATA: Stress-thallium scanning can identify patients with ischemic myocardium. Morbidity and mortality after aortic reconstruction appears to be largely caused by co-existent coronary artery disease, and patients who have had recent cardiac revascularization have few postoperative cardiac complications. METHODS: Preoperative stress-thallium scanning was evaluated prospectively in 146 patients undergoing aortic reconstruction. Patients with positive studies underwent coronary arteriography and cardiac revascularization, when appropriate. Postoperative cardiac complications and long-term survival in these patients were compared with results from 172 similar patients undergoing aortic reconstruction without stress-thallium scanning. Results also were analyzed to determine predictors of postoperative cardiac events. RESULTS: Forty-one per cent of patients undergoing stress-thallium testing underwent coronary arteriography, and 11.6% had cardiac revascularization. In contrast, 14.7% of patients treated without stress-thallium testing had coronary arteriography, and 4.1% had revascularization (p < 0.01). Despite this, cardiac mortality, serious cardiac complications, and long-term cardiac mortality were similar in both groups. Only advanced age and intraoperative complications (but not a positive stress-thallium test) predicted postoperative cardiac events. CONCLUSIONS: Preoperative stress-thallium testing confirmed a high incidence of significant coronary artery disease in patients undergoing aortic reconstruction, but prophylactic cardiac intervention does not reduce operative or long-term mortality. Thus, the risk and expense of routine stress-thallium testing and subsequent cardiac revascularization cannot be justified. 相似文献
9.
10.