全文获取类型
收费全文 | 6634篇 |
免费 | 604篇 |
国内免费 | 125篇 |
专业分类
耳鼻咽喉 | 48篇 |
儿科学 | 64篇 |
妇产科学 | 55篇 |
基础医学 | 543篇 |
口腔科学 | 217篇 |
临床医学 | 702篇 |
内科学 | 376篇 |
皮肤病学 | 121篇 |
神经病学 | 283篇 |
特种医学 | 196篇 |
外科学 | 1371篇 |
综合类 | 1270篇 |
一般理论 | 4篇 |
预防医学 | 539篇 |
眼科学 | 607篇 |
药学 | 511篇 |
67篇 | |
中国医学 | 244篇 |
肿瘤学 | 145篇 |
出版年
2024年 | 5篇 |
2023年 | 163篇 |
2022年 | 223篇 |
2021年 | 408篇 |
2020年 | 448篇 |
2019年 | 294篇 |
2018年 | 290篇 |
2017年 | 291篇 |
2016年 | 308篇 |
2015年 | 273篇 |
2014年 | 535篇 |
2013年 | 524篇 |
2012年 | 413篇 |
2011年 | 405篇 |
2010年 | 325篇 |
2009年 | 318篇 |
2008年 | 287篇 |
2007年 | 278篇 |
2006年 | 245篇 |
2005年 | 202篇 |
2004年 | 148篇 |
2003年 | 129篇 |
2002年 | 113篇 |
2001年 | 103篇 |
2000年 | 96篇 |
1999年 | 65篇 |
1998年 | 54篇 |
1997年 | 58篇 |
1996年 | 29篇 |
1995年 | 38篇 |
1994年 | 45篇 |
1993年 | 26篇 |
1992年 | 29篇 |
1991年 | 18篇 |
1990年 | 19篇 |
1989年 | 19篇 |
1988年 | 12篇 |
1987年 | 12篇 |
1986年 | 12篇 |
1985年 | 16篇 |
1984年 | 17篇 |
1983年 | 10篇 |
1982年 | 8篇 |
1981年 | 14篇 |
1980年 | 12篇 |
1979年 | 9篇 |
1978年 | 3篇 |
1974年 | 4篇 |
1973年 | 3篇 |
1968年 | 2篇 |
排序方式: 共有7363条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
《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
5.
目的 经口腔前庭腔镜甲状腺癌根治术的临床实践及与开放性手术进行比较。方法 回顾性收集并比较分析自2019年3月至2019年12月中国科学院大学宁波华美医院甲状腺外科行经口腔前庭腔镜甲状腺切除术和传统开放性甲状腺切除术的甲状腺肿瘤患者各45例临床资料(行经传统开放术式患者样本量较大,随机抽样选择45例),比较分析两组在性别、年龄、BMI、病理类型,清扫淋巴结数量以及手术时长,术后引流量,术后出现相关并发症,远期预后等指标。结果 两种术式患者术前术后相关临床资料无明显统计学差异,术中指标如出血量,淋巴清扫方面两组亦无统计学差异,但术中手术时间较开放组延长(P<0.05),手术费用较开放组更多,住院时长较开放组更短。结论 选择合适的患者,行经口腔前庭入路腔镜甲状腺癌根治术安全可行,在美容效果上有优势。 相似文献
6.
7.
8.
9.
Arnaud Roussel Nellie Della Schiava Raphaël Coscas Quentin Pellenc Tarek Boudjelit Olivier Goëau-Brissonnière Olivier Corcos Patrick Lermusiaux Marc Coggia Yves Castier 《Journal of vascular surgery》2019,69(4):1137-1142
Objective
Acute mesenteric ischemia (AMI) is an emergent event with a high mortality rate; survivors have high rates of intestinal failure. Restoration of blood flow using endovascular or surgical revascularization is associated with better outcome in terms of survival rate and intestinal resection. Retrograde open mesenteric stenting (ROMS), which is a hybrid technique, combines two benefits: prompt blood flow restoration with an endovascular approach and inspection and resection of the small bowel. The aim of the study was to assess the results of ROMS in thrombotic AMI in a retrospective multicenter study.Methods
We retrospectively enrolled all consecutive patients who underwent ROMS revascularization for occlusive thrombotic AMI in three participating tertiary care centers between November 2012 and March 2017.Results
Twenty-five patients (14 men and 11 women; mean age, 64.9 ± 11.6 years) were included. In two patients, ROMS was not possible because of failure of re-entry in the aortic lumen (technical success, 92%). One patient required revascularization of two visceral arteries and underwent an aortohepatic bypass. Five patients (20%) underwent endarterectomy and patch angioplasty of the superior mesenteric artery before retrograde stenting. Thirteen patients (52%) required bowel or colon resection (11 patients required both resections) during the initial procedure with a mean length of small bowel resection of 52 ± 87 cm. The 30-day operative mortality rate was 25%, and the overall 1-year survival rate was 65%. The 1-year primary patency rate was 92%. In one patient, postoperative imaging at 1 month showed stent migration in the aortic bifurcation.Conclusions
ROMS for thrombotic AMI has a high technical success rate and a high midterm primary patency rate. It could be an alternative procedure to retrograde superior mesenteric artery bypass for patients when percutaneous endovascular revascularization is not indicated or has failed. 相似文献10.
W. Du G. Chen D. Bai C. Xue W. Fei E. Luo 《International journal of oral and maxillofacial surgery》2019,48(4):502-510
Severe skeletal open bite associated with posterior vertical maxillary excess and mandibular deformity is considered a difficult problem in orthodontic and surgical treatment. This study used a navigation system for the correction of severe skeletal open bite in order to accurately transfer the virtual plan to the actual operation and achieve precise rigid internal fixation in bimaxillary osteotomies of the jaws. Twelve patients with a severe skeletal open bite associated with vertical maxillary excess and mandibular deformity were recruited. All patients underwent Le Fort I osteotomy and bilateral sagittal split ramus osteotomy with the guidance of this navigation system. Computed tomography and cephalometric examinations were performed to evaluate the correction of the deformity. Deviations between the simulated plan and actual postoperative outcome were measured to determine the precision of the surgery. Satisfactory and stable results were achieved in all patients postoperatively, without complications or relapse during follow-up. Photographs and cephalometric evaluations showed that the facial profile and occlusion were improved. Assessment of the deviations between the simulated plan and actual postoperative outcome showed that the navigation system can precisely transfer the virtual plan to the actual operation. The results suggest that the navigation system can accurately transfer the virtual plan to the actual operation during bimaxillary jaw osteotomies, without relapse, in patients with a severe skeletal open bite. 相似文献