全文获取类型
| 收费全文 | 1283233篇 |
| 免费 | 100507篇 |
| 国内免费 | 2021篇 |
学科分类
| 医药卫生 | 1385761篇 |
出版年
| 2018年 | 13284篇 |
| 2017年 | 10079篇 |
| 2016年 | 11051篇 |
| 2015年 | 12525篇 |
| 2014年 | 17340篇 |
| 2013年 | 26596篇 |
| 2012年 | 36552篇 |
| 2011年 | 38624篇 |
| 2010年 | 23109篇 |
| 2009年 | 22091篇 |
| 2008年 | 37117篇 |
| 2007年 | 39733篇 |
| 2006年 | 39991篇 |
| 2005年 | 38910篇 |
| 2004年 | 38042篇 |
| 2003年 | 36865篇 |
| 2002年 | 36254篇 |
| 2001年 | 64180篇 |
| 2000年 | 66641篇 |
| 1999年 | 56554篇 |
| 1998年 | 15213篇 |
| 1997年 | 13850篇 |
| 1996年 | 14296篇 |
| 1995年 | 13536篇 |
| 1994年 | 12830篇 |
| 1993年 | 11848篇 |
| 1992年 | 44669篇 |
| 1991年 | 43560篇 |
| 1990年 | 42303篇 |
| 1989年 | 40197篇 |
| 1988年 | 36979篇 |
| 1987年 | 36321篇 |
| 1986年 | 33668篇 |
| 1985年 | 32343篇 |
| 1984年 | 24189篇 |
| 1983年 | 20285篇 |
| 1982年 | 11746篇 |
| 1981年 | 10721篇 |
| 1980年 | 9527篇 |
| 1979年 | 21355篇 |
| 1978年 | 14835篇 |
| 1977年 | 12532篇 |
| 1976年 | 11717篇 |
| 1975年 | 12639篇 |
| 1974年 | 14696篇 |
| 1973年 | 14152篇 |
| 1972年 | 12984篇 |
| 1971年 | 11745篇 |
| 1970年 | 11074篇 |
| 1969年 | 10027篇 |
排序方式： 共有10000条查询结果，搜索用时 31 毫秒
71.
72.
73.
74.
F. Giovanardi F. Nudo Q. Lai M. Garofalo A. Consolo E. Choppin De Janvry G.A. Arroyo Murillo P. Ursi D. Stabile F. Melandro P.B. Berloco R. Pretagostini L. Poli 《Transplantation proceedings》2019,51(1):128-131
Background
Arterial vascular anomalies in patients undergoing kidney transplantation (KT) are correlated with a higher incidence of early surgical complications, potentially causing graft loss. Arterial reconstruction allows patients to overcome these surgical challenges, thus minimizing the risk of poor outcomes. The aim of the present study is to retrospectively investigate the safety and effectiveness of the multiple arterial reconstruction technique with a Teflon patch in case of an unavailable aortic patch: to do so, surgical complications, graft function, and patient survival were evaluated.Methods
During the period January 2009 to August 2016, 202 adult deceased-donor KTs were performed at our center. Group A (n = 27; reconstruction of multiple arteries) and Group B (n = 175; control group) were compared.Results
No differences were observed between the 2 groups in terms of early postoperative course, with no vascular complication observed in Group A. No vascular patch infections were reported, nor longer cold ischemia time rates. Similarly, long-term survival rates were similar between the 2 groups.Conclusions
The Teflon-patch arterial reconstruction technique appears to be safe and effective, with an acceptable balance of benefits and potential risks of using a prosthetic material. Studies based on larger series are needed to further validate this approach. 相似文献75.
Paul J. Devlin Brian W. McCrindle James K. Kirklin Eugene H. Blackstone William M. DeCampli Christopher A. Caldarone Ali Dodge-Khatami Pirooz Eghtesady James M. Meza Peter J. Gruber Kristine J. Guleserian Bahaaladin Alsoufi Linda M. Lambert James E. O&#x;Brien Erle H. Austin Jeffrey P. Jacobs Tara Karamlou 《The Journal of thoracic and cardiovascular surgery》2019,157(2):684-695.e8
Objective
Arch obstruction after the Norwood procedure is common and contributes to mortality. We determined the prevalence, associated factors, and practice variability of arch reintervention and assessed whether arch reintervention is associated with mortality.Methods
From 2005 to 2017, 593 neonates in the Congenital Heart Surgeons' Society Critical Left Heart Obstruction cohort underwent a Norwood procedure. Median follow-up was 3.7 years. Multivariable parametric models, including a modulated renewal analysis, were performed.Results
Of the 593 neonates, 146 (25%) underwent 218 reinterventions for arch obstruction after the Norwood procedure: catheter-based (n = 168) or surgical (n = 50) at a median age of 4.3 months (quartile 1-quartile 3, 2.6-5.7). Interdigitation of the distal aortic anastomosis was protective against arch reintervention. Development of ≥ moderate tricuspid valve regurgitation and right ventricular dysfunction at any point was associated with arch reintervention. Nonsignificant variables for arch reintervention included shunt type and preoperative aortic measurements. Surgical arch reintervention was protective against arch reintervention, but transcatheter reintervention was associated with increased reintervention. Arch reintervention was not associated with increased mortality. There was wide institutional variation in incidence of arch reintervention (range, 0-40 reinterventions per 100 years patient follow-up) and in preintervention gradient (range, 0-64 mm Hg).Conclusions
Interdigitation of the distal aortic anastomosis during the Norwood procedure decreased the risk of arch reintervention. Surgical arch reintervention is more definitive than transcatheter. Arch reintervention after the Norwood procedure is not associated with increased mortality. Serial surveillance for arch obstruction, integrated with changes in right ventricular function and tricuspid valve regurgitation, is recommended after the Norwood procedure to improve outcomes. 相似文献76.
77.
78.
79.
80.
R. Foley P. Kelly S. Gatault F. Powell 《Journal of the European Academy of Dermatology and Venereology》2021,35(1):62-72
Demodex mites are microscopic arachnids found in the normal skin of many mammals. In humans, it is well established that Demodex mite density is higher in patients with the skin condition rosacea, and treatment with acaricidal agents is effective in resolving symptoms. However, pathophysiology of rosacea is complex and multifactorial. In dogs, demodicosis is a significant veterinary issue, particularly the generalized form of the disease which can be fatal if untreated. In each species, clinical and molecular studies have shown that the host’s immunological interactions with Demodex mites are an important, but not fully understood, aspect of how Demodex can live in the skin either as a harmless commensal organism or as a pathogenic agent. This review outlines the role of Demodex mites in humans and dogs, considering morphology, prevalence, symptoms, diagnosis, histology treatment and pathogenesis. 相似文献
