全文获取类型
收费全文 | 1529篇 |
免费 | 366篇 |
国内免费 | 8篇 |
学科分类
医药卫生 | 1903篇 |
出版年
2024年 | 11篇 |
2023年 | 56篇 |
2022年 | 10篇 |
2021年 | 32篇 |
2020年 | 32篇 |
2019年 | 18篇 |
2018年 | 89篇 |
2017年 | 103篇 |
2016年 | 100篇 |
2015年 | 99篇 |
2014年 | 100篇 |
2013年 | 94篇 |
2012年 | 36篇 |
2011年 | 47篇 |
2010年 | 61篇 |
2009年 | 89篇 |
2008年 | 63篇 |
2007年 | 51篇 |
2006年 | 44篇 |
2005年 | 36篇 |
2004年 | 29篇 |
2003年 | 29篇 |
2002年 | 21篇 |
2001年 | 38篇 |
2000年 | 22篇 |
1999年 | 37篇 |
1998年 | 41篇 |
1997年 | 63篇 |
1996年 | 53篇 |
1995年 | 51篇 |
1994年 | 39篇 |
1993年 | 32篇 |
1992年 | 29篇 |
1991年 | 24篇 |
1990年 | 31篇 |
1989年 | 22篇 |
1988年 | 15篇 |
1987年 | 17篇 |
1986年 | 13篇 |
1985年 | 13篇 |
1984年 | 14篇 |
1983年 | 10篇 |
1982年 | 9篇 |
1981年 | 10篇 |
1980年 | 7篇 |
1979年 | 11篇 |
1978年 | 8篇 |
1977年 | 6篇 |
1976年 | 11篇 |
1975年 | 10篇 |
排序方式: 共有1903条查询结果,搜索用时 15 毫秒
1.
2.
MR compatibility of Guglielmi detachable coils 总被引:6,自引:0,他引:6
3.
BEVERLY HAVENS RN MN MPH INGRID SWENSON RN DPH 《Journal of obstetric, gynecologic, and neonatal nursing : JOGNN / NAACOG》1986,15(5):406-411
Seventy-four 8th- and 10th-grade students attending a private girls' school in Hawaii were queried about their perceptions of and preparation for menstruation using a questionnaire administered in a health education class. Eighty percent had already started menstruating. The most frequently cited perceptions by the respondents referred to both the inconveniences and the normalcy of menstruation. Many were first informed about menstruation by their mothers and stated that they also first informed their mothers when they started menstruating. Surprise, fear, and embarrassment were common initial reactions, while strong negative or positive emotions were more rare. Only 35% wanted boys and girls together during class discussion, but 89% stated that boys needed to be informed about menstruation. The most frequent reasons cited for noncoed settings were the girls' concern about their comfort in openly discussing menstruation. Thirty-eight percent thought parents should inform other siblings when they started menstruation, although almost half gave specific conditions the parents should consider. The majority thought the fifth to sixth grades were the best times to introduce menstruation content. 相似文献
4.
A R Moosvi M Gheorghiade S Goldstein F Khaja 《Henry Ford Hospital medical journal》1991,39(3-4):240-244
Cardiogenic shock complicating acute myocardial infarction (MI) carries a high mortality which in some series prior to 1980 exceeded 80%. Neither the use of inotropic and vasopressor agents nor intraaortic balloon counterpulsation was found to improve survival in this group of patients. Intravenous thrombolytic agents improve survival in patients with acute MI, but their role in cardiogenic shock is unknown. Reports of the use of surgical and mechanical interventions in patients with severe left ventricular dysfunction were examined to determine if there was any benefit to be derived from restoring blood flow to ischemic areas of the myocardium. It was found that urgent placement of intraaortic balloon counterpulsation followed by coronary bypass surgery may improve survival rates and successful coronary angioplasty also appeared to benefit patients with cardiogenic shock. Similar improvement in survival has been reported after successful coronary reperfusion. In surgical series with predominantly nonmechanical causes of shock, survival has varied from 40% to 88%. Data from our five-year experience in the management of MI patients with cardiogenic shock suggest that coronary revascularization with coronary angioplasty or bypass surgery improves survival in patients with cardiogenic shock especially when performed within 24 hours of the onset of shock. 相似文献
5.
6.
7.
8.
The key informant technique 总被引:3,自引:1,他引:2
BACKGROUND AND OBJECTIVE: This article considers the role of the key informant techniqueas a qualitative research method and examines the potentialcontribution of the approach to health care research. METHOD: The principles underlying the technique and the advantages anddisadvantages are considered, illustrated with examples froma range of social science studies. RESULTS AND CONCLUSION: An example of the author's own use of key informants in a studyof the professional relationship between general practitionersand specialists is described. Keywords. Key informants, qualitative methods, professional relationships. 相似文献
9.
10.
Louise Rose MN Adult Ed Cert BN ICU Cert Dip Nurs Marie F. Gerdtz RN BN AE Cert GDAET PhD 《Australasian emergency nursing journal : AENJ》2007,10(1):26-29
The use of mechanical ventilation in the Emergency Department requires adequate resources in order to maintain patient safety and avoid potential risks. Moreover, developments in technology require increased knowledge of mechanical ventilation techniques to address the complexity of decision-making involved. Organisational issues and system factors have the potential to negatively impact on the ability of the emergency service to provide optimum care to patients receiving mechanical ventilation. These issues include staffing and skill-mix, demand on emergency services, role-delineation, scope of practice, and current mechanisms for monitoring of quality and safety. Furthermore, in response to advances in ventilator technology, current education programs for both nursing and medical staff require review to ensure that they provide comprehensive information about the types of ventilation techniques now available and the relative risks and benefits associated with their application.This article is the second in a two-part series and explores the educational and organisational factors that impact upon safety and quality of care delivered to patients receiving mechanical ventilation in the emergency department. Recommendations for future policy development, curriculum review and reporting mechanisms to support further research in the application of mechanical ventilation in the emergency department are made. 相似文献