全文获取类型
收费全文 | 215篇 |
免费 | 10篇 |
国内免费 | 6篇 |
专业分类
儿科学 | 8篇 |
妇产科学 | 6篇 |
基础医学 | 13篇 |
口腔科学 | 13篇 |
临床医学 | 39篇 |
内科学 | 47篇 |
皮肤病学 | 11篇 |
神经病学 | 1篇 |
特种医学 | 27篇 |
外科学 | 16篇 |
综合类 | 23篇 |
预防医学 | 9篇 |
眼科学 | 3篇 |
药学 | 9篇 |
肿瘤学 | 6篇 |
出版年
2022年 | 1篇 |
2021年 | 2篇 |
2020年 | 3篇 |
2018年 | 3篇 |
2017年 | 2篇 |
2016年 | 2篇 |
2015年 | 5篇 |
2014年 | 10篇 |
2013年 | 10篇 |
2012年 | 6篇 |
2011年 | 6篇 |
2010年 | 19篇 |
2009年 | 13篇 |
2008年 | 6篇 |
2007年 | 15篇 |
2006年 | 5篇 |
2005年 | 3篇 |
2004年 | 5篇 |
2003年 | 2篇 |
2002年 | 2篇 |
2001年 | 2篇 |
2000年 | 6篇 |
1999年 | 6篇 |
1998年 | 15篇 |
1997年 | 8篇 |
1996年 | 11篇 |
1995年 | 9篇 |
1994年 | 10篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 5篇 |
1987年 | 3篇 |
1986年 | 5篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1978年 | 1篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1971年 | 1篇 |
1968年 | 1篇 |
1928年 | 1篇 |
排序方式: 共有231条查询结果,搜索用时 15 毫秒
71.
72.
73.
J Almeyda FRCS NS Tolley K Ghufoor G Mochoulis 《International journal of clinical practice》1997,51(6):402-403
Although the incidence of laryngeal tuberculosis has been declining over the past 30 years, it should still be considered in the differential diagnosis of patients with laryngeal pathology. In contrast to the pre-chemotherapy era, few, if any, signs of pulmonary tuberculosis are seen in such cases, and presentation is similar to either chronic non-specific laryngitis or carcinoma. The subglottis is a site rarely involved in laryngeal tuberculosis. Tissue biopsy and culture are diagnostic and a full course of antituberculous chemotherapy usually resolves the condition. Airway insufficiency due to fibrosis, however, often necessitates surgical Intervention. We present a case where the only laryngeal manifestation of tuberculosis was subglottic stenosis. 相似文献
74.
The purpose of this study was to examine relationships among gender-role preference, self-esteem and employment category (full-time, part-time, homemaker) while controlling for the effects of income and religion. Data were collected from 79 White married women using the Rosenberg Self-Esteem Scale and a gender-role preference scale developed by the author. Findings indicated that: (a) there are significant differences in gender-role preference among categories of employment, with full-time workers having more modern views; (b) category of employment did not influence self-esteem; and (c) women with mixed gender-role preference had lower self-esteem than those with modern gender-role preference. The strength of the relationship between self-esteem and gender-role preference varied by category of employment. Gender-role preference made a significant contribution as a predictor of self-esteem (above and beyond the effects of income and religion) for full-time workers only. 相似文献
75.
Normal instability of the hip in the neonate: US standards 总被引:1,自引:0,他引:1
In recent years, the use of real-time ultrasonography (US) has enabled dynamic evaluation of the infant hip through a range of motion and stress. Preliminary experience has suggested that a certain amount of instability in the hips of newborns is normal, but no standards have been established. In this study, a group of term neonates whose physical examinations were normal were examined with US on the 1st and 2d days of life. Each hip was imaged in the transverse plane in nonstressed and stressed positions, and movement of the femoral head under stress was quantitated. This displacement under stress was used to establish a normal range of hip instability in neonates. Patterns of hip laxity in boys and girls are identical, and in most infants hip instability diminishes between the 1st and 2d days of life. Our method of quantitating hip instability produces consistent results, with intraobserver 95% confidence intervals of +/- 1.2 mm for each measurement. 相似文献
76.
Epidurography using epinephrine and tomography 总被引:1,自引:0,他引:1
77.
78.
The advent of the human immunodeficiency virus infection and the increasing prevalence of compromised individuals in the community due to modern therapeutic advances have resulted in a resurgence of opportunistic infections, including oral candidosis, which is by far the most common oral fungal infection in man. Broad-spectrum antibiotics used in the treatment of a wide range of disease conditions have also been attributed as a predisposing factor of oral candidosis. In this mini review we discuss the research findings on the relationship between antibiotics and oral candidosis and possible mechanisms of pathogenicity following such therapy. 相似文献
79.
An example is presented of an IgG1, anti-Lu6, that reacted by indirect antiglobulin test and was capable of destroying antigen-positive red cells in vivo. Two methods for the measurement of red cell survival, 51Cr labeling and flow cytometry, gave the same result: 20 percent of the test dose of Lu:6 red cells was destroyed in the first hour after injection and 80 percent in the first 24 hours. The clinical relevance of the antibody was correctly predicted by an in vitro monocyte monolayer assay. The finding that this example of anti-Lu6 was clinically significant should not be taken to mean that all antibodies directed against high-incidence Lutheran and Lutheran system-related antigens will behave similarly. When such antibodies are encountered, in vivo and/or in vitro studies to assess their clinical significance are necessary before rare blood is used for transfusion. 相似文献
80.
OP Habler ; MS Kleen ; JW Hutter ; AH Podtschaske ; M Tiede ; GI Kemming ; MV Welte ; CO Corso ; S Batra ; PE Keipert ; NS Faithfull ; KF Messmer 《Transfusion》1998,38(2):145-155
BACKGROUND: Intravenously administered perfluorocarbon (PFC) emulsions increase oxygen solubility in plasma. PFC might therefore temporarily replace red cells (RBCs) lost during intraoperative hemorrhage. In patients who have undergone hemodilution, the return of autologous blood may be delayed by the administration of PFC, and autologous RBCs may be saved for transfusion after surgical bleeding is stopped and PFC is cleared by the reticuloendothelial system. STUDY DESIGN AND METHODS: In 22 anesthetized, hemodiluted dogs (hemoglobin [Hb] 7 g/dL) breathing 100-percent O2, an intraoperative volume-compensated blood loss was simulated. The efficacy of three therapeutic regimens in maintaining tissue oxygenation was compared: 1) RBC group (n = 7): maintenance of a Hb > 7 g per dL by transfusion of autologous RBCs; 2) PFC group (n = 7): bolus application of a second-generation PFC emulsion (60% wt/vol perflubron) and further acute normovolemic hemodilution (ANH) to a Hb of 3 g per dL; and 3) control group (n = 7): further ANH alone to a Hb of 3 g per dL. Systemic and myocardial oxygenation status and tissue oxygenation were assessed. RESULTS: Autologous RBCs transfused to maintain a Hb of 7 g per dL preserved hemodynamics and tissue oxygenation during blood loss. In the PFC and control groups, heart rate and cardiac index increased significantly in response to further ANH. Tissue oxygenation was not different in the PFC and the RBC groups. Direct comparison of the PFC and control groups revealed better tissue oxygenation in the PFC group, as reflected by significantly higher mixed venous, coronary venous, and local tissue pO2 on liver and skeletal muscle. CONCLUSION: Bolus intravenous administration of 60- percent (wt/vol) perflubron emulsion and further hemodilution from a Hb of 7 g per dL to one of 3 g per dL were as effective as autologous RBC transfusion in maintaining tissue oxygenation during volume-compensated blood loss designed to mimic surgical bleeding. 相似文献