全文获取类型
收费全文 | 33070篇 |
免费 | 2311篇 |
国内免费 | 877篇 |
专业分类
耳鼻咽喉 | 146篇 |
儿科学 | 712篇 |
妇产科学 | 439篇 |
基础医学 | 2290篇 |
口腔科学 | 271篇 |
临床医学 | 4317篇 |
内科学 | 9396篇 |
皮肤病学 | 110篇 |
神经病学 | 423篇 |
特种医学 | 1428篇 |
外科学 | 9286篇 |
综合类 | 3945篇 |
现状与发展 | 1篇 |
预防医学 | 864篇 |
眼科学 | 262篇 |
药学 | 1582篇 |
20篇 | |
中国医学 | 313篇 |
肿瘤学 | 453篇 |
出版年
2024年 | 49篇 |
2023年 | 723篇 |
2022年 | 1231篇 |
2021年 | 1905篇 |
2020年 | 1866篇 |
2019年 | 1734篇 |
2018年 | 1623篇 |
2017年 | 1150篇 |
2016年 | 1042篇 |
2015年 | 1172篇 |
2014年 | 2410篇 |
2013年 | 2323篇 |
2012年 | 1574篇 |
2011年 | 1828篇 |
2010年 | 1477篇 |
2009年 | 1517篇 |
2008年 | 1404篇 |
2007年 | 1387篇 |
2006年 | 1274篇 |
2005年 | 1121篇 |
2004年 | 938篇 |
2003年 | 841篇 |
2002年 | 737篇 |
2001年 | 606篇 |
2000年 | 505篇 |
1999年 | 444篇 |
1998年 | 397篇 |
1997年 | 334篇 |
1996年 | 334篇 |
1995年 | 277篇 |
1994年 | 257篇 |
1993年 | 238篇 |
1992年 | 215篇 |
1991年 | 147篇 |
1990年 | 144篇 |
1989年 | 121篇 |
1988年 | 118篇 |
1987年 | 117篇 |
1986年 | 105篇 |
1985年 | 101篇 |
1984年 | 100篇 |
1983年 | 70篇 |
1982年 | 78篇 |
1981年 | 41篇 |
1980年 | 47篇 |
1979年 | 38篇 |
1978年 | 27篇 |
1977年 | 15篇 |
1976年 | 20篇 |
1973年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 171 毫秒
31.
《Journal of vascular and interventional radiology : JVIR》2020,31(1):150-154.e2
Thoracic endovascular aortic repair (TEVAR) for aneurysmal chronic dissection is often complicated by retrograde filling of the false lumen and dissected distal landing zone. A “cheese wire”-style fenestration of the dissection intimal flap can create a landing zone facilitating TEVAR. This technique successfully aided TEVAR in 3 patients with an average age of 57.3 years. Complications included type III endoleak requiring relining and renal artery occlusion requiring stent placement. Average duration of clinical follow-up was 19 ± 4 months. Imaging follow-up was 8 ± 10 months. All patients have survived for more than 1 year without aneurysm enlargement. 相似文献
32.
33.
34.
《The surgeon》2015,13(5):286-291
BackgroundCure of aneurysms which involve the aorta at the level of the visceral arteries and the thoracoabdominal segment remains a considerable surgical enterprise with a relatively high mortality and morbidity despite improvements of the surgical procedure and anesthetic technique. Fenestrated and branched endovascular stent grafts are currently available offering an attractive less invasive option especially for most frail patients. These grafts are relatively recent, technically more demanding to insert than the current stent graft for infrarenal aneurysm and besides, given the relative low frequency of the disease, they are much less used by practitioners. Thus, unconditional widespread of this sophisticated technique may not necessarily benefit patients.MethodsWe reviewed our experiences and articles regarding this concern, 1) who should perform this new technique and 2) in what kind of setting.ConclusionBased on the combined complexities of 1) patients selection, 2) proper planning and manufacturing of the graft, 3) the need for outstanding imaging and operating facilities, 4) and the required endovascular skill of physicians involved in the procedure, we feel that only highly specialized centers should be allowed to perform this complex procedure. 相似文献
35.
《Cancer cell》2021,39(11):1497-1518.e11
- Download : Download high-res image (282KB)
- Download : Download full-size image
36.
《Foot and Ankle Surgery》2022,28(7):883-886
BackgroundStudies concerning total ankle arthroplasty could be influenced by several forms of bias. Independent national arthroplasty registries represent objective data on survival and patient reported outcomes. The aim of this study was to determine survival and identify risk factors for early failure in a nationwide series of total ankle arthroplasties from the Dutch Arthroplasty Register (LROI).Patients and methodsData of 810 patients, who received 836 total ankle arthroplasties between 2014 and 2020 were obtained from the Dutch Arthroplasty Register (LROI) with a median follow-up of 38 months (range 1–84 months). Survival was expressed in Kaplan-Meier analysis and associated hazard ratios for implant failure were determined. Implant failure was defined as the need for revision surgery for any reason or (pan)arthrodesis.ResultsDuring follow-up, we recorded 39 failures (4.7%) resulting in a implant survival of 95.3% with a median follow-up of 38 months (range 1–84 months). Medial malleolus osteotomy (HR = 2.27), previous surgery (HR = 1.83), previous osteotomy (HR = 2.82) and previous ligament reconstruction (HR = 2.83) all showed potentially clinically meaningful associations with a higher incidence of implant failure, yet only previous OCD treatment (HR = 6.21), BMI (HR = 1.09) and age (HR = 0.71) were statistically significant.InterpretationExcellent short-term survival (95.3%) with a median follow-up of 38 months was reported for TAA patients from the Dutch Arthroplasty Register. Patients with a lower age, a higher BMI or who had a prior surgical OCD treatment before TAA surgery appear to have a higher risk for revision after short-term clinical follow-up. Thorough patient selection with emphasis on risk factors associated with early implant failure might be essential to improve TAA survivorship. 相似文献
37.
38.
《Revista espa?ola de anestesiología y reanimación》2022,69(9):517-525
Background and objectivesThe ideal timing of tranexamic acid administration in total knee arthroplasty with tourniquet remains unclear. Our primary objective was to prove if administering it before surgical incision, instead of before releasing the tourniquet, reduces postoperative bleeding. A second objective was to determine whether a second dose reduces post-operative bleeding.Material and methodsA prospective, double-blind clinical trial was performed on 212 patients scheduled for total knee arthroplasty. They were randomised into 4 groups. Tranexamic acid was administered before the surgical incision in “pre-induction groups” (1 and 2), and just before the tourniquet release in “pre-release groups” (3 and 4). Groups 2 and 4 received a second dose 3 hours post-surgery. Main outcome was postoperative bleeding (visible blood loss and calculated total bleeding). Secondary outcomes were haemoglobin variations, complications and transfusion rate.ResultsThe mean calculated total bleeding was 1563 ml (95%CI: 1445 to 1681) in preinduction groups versus 1576 ml (95%CI: 1439 to 1713) in pre-release groups (P = .9); 1579 ml (95%CI: 1452 to 1706) in single-dose groups versus 1559 ml (95%CI: 1431 to 1686) in double-dose groups (P = .82). One patient was transfused. The mean haemoglobin at discharge was 10.4 g/dl (95%CI: 10.2 to 10.7) in singledose groups versus 10.8 (95%CI: 10.6 to 11.1) in double-dose groups (P = .06).ConclusionsThere were no differences in bleeding or transfusion regarding the time of tranexamic acid administration. The second dose had not impact on outcomes.Trial registration: EudraCT 2016-000071-24. 相似文献
39.
40.