全文获取类型
收费全文 | 27050篇 |
免费 | 1064篇 |
国内免费 | 449篇 |
专业分类
耳鼻咽喉 | 100篇 |
儿科学 | 128篇 |
妇产科学 | 49篇 |
基础医学 | 1871篇 |
口腔科学 | 924篇 |
临床医学 | 1840篇 |
内科学 | 434篇 |
皮肤病学 | 31篇 |
神经病学 | 345篇 |
特种医学 | 1521篇 |
外科学 | 12676篇 |
综合类 | 4995篇 |
预防医学 | 770篇 |
眼科学 | 328篇 |
药学 | 1702篇 |
33篇 | |
中国医学 | 668篇 |
肿瘤学 | 148篇 |
出版年
2024年 | 59篇 |
2023年 | 306篇 |
2022年 | 586篇 |
2021年 | 795篇 |
2020年 | 839篇 |
2019年 | 612篇 |
2018年 | 517篇 |
2017年 | 740篇 |
2016年 | 879篇 |
2015年 | 853篇 |
2014年 | 1868篇 |
2013年 | 1844篇 |
2012年 | 1865篇 |
2011年 | 2113篇 |
2010年 | 1724篇 |
2009年 | 1713篇 |
2008年 | 1564篇 |
2007年 | 1606篇 |
2006年 | 1412篇 |
2005年 | 1326篇 |
2004年 | 1161篇 |
2003年 | 830篇 |
2002年 | 624篇 |
2001年 | 541篇 |
2000年 | 394篇 |
1999年 | 324篇 |
1998年 | 220篇 |
1997年 | 198篇 |
1996年 | 158篇 |
1995年 | 139篇 |
1994年 | 109篇 |
1993年 | 83篇 |
1992年 | 57篇 |
1991年 | 46篇 |
1990年 | 38篇 |
1989年 | 37篇 |
1988年 | 40篇 |
1987年 | 36篇 |
1986年 | 38篇 |
1985年 | 44篇 |
1984年 | 30篇 |
1983年 | 25篇 |
1982年 | 35篇 |
1981年 | 29篇 |
1980年 | 15篇 |
1979年 | 19篇 |
1978年 | 14篇 |
1977年 | 21篇 |
1975年 | 9篇 |
1974年 | 6篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
Josh Greenstein Devjani Das Josie Acuna Monica Kapoor Cara Brown Abbas Husain Brendan Lally Barry Hahn 《The American journal of emergency medicine》2019,37(2):313-316
Background
In the emergency department, rib fractures are a common finding in patients who sustain chest trauma. Rib fractures may be a sign of significant, underlying pathology, especially in the elderly patients where rib fractures are associated with significant morbidity and mortality. To date, no studies have evaluated the ability of ultrasound to detect rib fractures using cadaver models and subsequently use this model as a teaching tool.Objectives
The purpose of this study was to determine if it is possible to generate rib fractures on cadaver models which could be accurately identified using ultrasound.Methods
This was a cross-sectional study performed during one session at a cadaver lab. A single hemithorax from four adult cadavers were used as models. Single rib fractures on each of rib five through eight were created. Four subjects, blinded to the normal versus fractured ribs, were asked to identify the presence of a fracture on each rib.Results
A total of 8 of 16 potential ribs had fractured induced by study staff. Mean accuracy was 55% for all subjects. The overall sensitivity and specificity for detecting rib fractures was 50% (CI: 31.89–68.11) and 59.38% (CI: 35.69–73.55) respectively. The overall PPV and NPV was 55.17% and 54.29% respectively.Conclusions
In this pilot study, subjects were not able to detect induced rib fractures using ultrasound on cadaver models. The use of this model as a teaching tool in the detection of rib fractures requires further investigation. 相似文献3.
Objectives
Iatrogenic injury of the Profunda Femoris Artery (PFA) at time of hip fixation surgery can increase morbidity and mortality and prolong the hospital stay. This is an injury that tends to pass unnoticed as a cause of postoperative deterioration despite being frequently reported in the literature. Our study aims to describe the anatomy of the PFA in relation to the medial femoral cortex with specific emphasis on its orientation relative to the position of a sliding hip screw side plate construct. By doing so we are able to present clear guidance to orthopaedic surgeons on how to avoid iatrogenic PFA injury at the time of hip fracture fixation.Methods
Using Computed Tomography Angiographic (CTA) studies, the course of the PFA in relation to the medial femoral cortex was traced in 44 patients (28 males and 16 females) with mean age of 65.6 years. Coronal and axial CT sections were cross-linked to specify the position of the PFA at 1?cm intervals.Results
The course of the artery could be divided into three parts relative to a fixed reference point. Proximal and distal parts of the artery were in a safer position in comparison to the middle part of the artery that was found very close to the femoral cortex and along the coronal axis of the femur (mean angle 2.9° from the femoral coronal axis and 13.8?mm from the medial femoral cortex). Using the commercially available side plate constructs, this part of the artery corresponded to the distal part of the plate (third and fourth holes).Conclusion
Special attention needs to be practiced by the operating surgeon while drilling into the third and fourth holes of the side plate. 相似文献4.
5.
6.
7.
《Journal of Clinical Orthopaedics and Trauma》2021,12(6):976-982
ObjectiveMultiple treatment options for acetabular fractures in geriatric patients exist. However, no large-scale studies have reported the outcomes of acute total hip arthroplasty (THA) in this patient population. We systematically evaluated all available evidence to characterize clinical outcomes, complications, and revisions of acute THA for acetabular fractures in geriatric patients.MethodsMeta-analysis of 21 studies of 430 acetabular fractures with mean follow-up of 44 months (range, 17−97 months). Two independent researchers searched and evaluated the databases of Ovid, Embase, and United States National Library of Medicine using a Boolean search string up to December 2019. Population demographics and complications, including presence of heterotopic ossification (HO), dislocation, infection, revision rate, neurological deficits, and venous thromboembolic event (VTE), were recorded and analyzed.ResultsWeighted mean Harris Hip Score was 83.3 points, and 20% of the patients had reported complications. The most common complication was HO, with a rate of 19.5%. Brooker grade III and IV HO rates were lower at 6.8%. Hip dislocation occurred at a rate of 6.1%, 4.1% of patients developed VTE, deep infection occurred in 3.8%, and neurological complications occurred in 1.9%. Although the revision rate was described in most studies, we were unable to perform a survival analysis because the time to each revision was described in only a few studies. The revision rate was 4.3%.ConclusionsAcute THA is a viable option for treatment of acetabular fracture and can result in acceptable clinical outcomes and survivorship rates in older patients but with an associated complication rate of approximately 20%. Considering the limited treatment options, THA might be a viable alternative for appropriately selected patients. 相似文献
8.
9.
关节镜辅助下钢板内固定治疗关节内跟骨骨折 总被引:3,自引:1,他引:2
[目的]探讨分析关节镜辅助下钢板内固定治疗关节内跟骨骨折的方法和疗效;[方法]对78位患者,86例累及关节面的跟骨骨折在关节镜辅助下行切开复位钢板内固定术,术后平均随访18个月(12~30个月),通过比较术前术后X线片和踝足功能的AOFAS评分对治疗效果作分析评价.[结果]86例关节内跟骨骨折术后X线示复位满意.与术前存在显著性差异(P〈0.01),AOFAS评分优良率91.86%.[结论]对于关节内跟骨骨折,采用关节镜辅助钢板内固定更加接近解剖复位,足部功能恢复满意且并发症少 相似文献
10.