全文获取类型
收费全文 | 690篇 |
免费 | 18篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 27篇 |
儿科学 | 103篇 |
妇产科学 | 20篇 |
基础医学 | 42篇 |
口腔科学 | 10篇 |
临床医学 | 52篇 |
内科学 | 135篇 |
皮肤病学 | 13篇 |
神经病学 | 51篇 |
特种医学 | 45篇 |
外科学 | 137篇 |
综合类 | 2篇 |
预防医学 | 10篇 |
眼科学 | 26篇 |
药学 | 18篇 |
肿瘤学 | 18篇 |
出版年
2023年 | 1篇 |
2022年 | 9篇 |
2021年 | 9篇 |
2020年 | 3篇 |
2019年 | 9篇 |
2018年 | 6篇 |
2017年 | 7篇 |
2016年 | 11篇 |
2015年 | 21篇 |
2014年 | 24篇 |
2013年 | 38篇 |
2012年 | 50篇 |
2011年 | 35篇 |
2010年 | 29篇 |
2009年 | 22篇 |
2008年 | 56篇 |
2007年 | 53篇 |
2006年 | 57篇 |
2005年 | 77篇 |
2004年 | 56篇 |
2003年 | 44篇 |
2002年 | 32篇 |
2001年 | 12篇 |
2000年 | 19篇 |
1999年 | 5篇 |
1998年 | 7篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1987年 | 2篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1981年 | 3篇 |
1978年 | 1篇 |
1967年 | 1篇 |
排序方式: 共有709条查询结果,搜索用时 15 毫秒
11.
12.
Kanbay Mehmet Medetalibeyoglu Alpay Kanbay Asiye Cevik Enes Tanriover Cem Baygul Arzu Şenkal Naci Konyaoglu Hilal Akpinar Timur S. Kose Murat Covic Adrian Tukek Tufan 《International urology and nephrology》2022,54(5):1097-1104
International Urology and Nephrology - Acute kidney injury (AKI) in COVID-19 patients is associated with poor prognosis. However, the incidence, risk factors and potential outcomes of AKI in... 相似文献
13.
14.
15.
16.
Gullu H Erdogan D Caliskan M Tok D Yildirim E Ulus T Turan Sezgin A Muderrisoglu H 《Echocardiography (Mount Kisco, N.Y.)》2006,23(10):835-842
BACKGROUND: In this study, we searched for a correlation between transthoracic coronary flow reserve (CFR) and well-established surrogates of coronary atherosclerosis. METHODS: The study was conducted on 136 healthy subjects (mean age: 39.9 +/- 7.3 years) who were free of coronary risk factors. Transthoracic echocardiography was used to measure the aortic stiffness index (AoSI), aortic distensibility (AoD), and aortic elastic modulus (AoEM). High-resolution ultrasound was used to measure brachial artery endothelium-dependent and independent vasomotion and carotid intima-media thickness (IMT). In addition, transthoracic second harmonic Doppler echocardiography was used to measure CFR. RESULTS: All of the parameters significantly correlated with each other except brachial endothelium-independent dilation. CFR correlated significantly with brachial endothelium-dependent dilation (EDD) (r = 0.302, P < 0.01), carotid IMT (r =-0.388, P < 0.01), brachial artery diameter (r = 0.340, P < 0.01), AoD (r = 0.275, P < 0.01), AoS (r =-0.299, P < 0.01), and AoEM (r =-0.30,7 P < 0.01). Carotid IMT correlated significantly with brachial EDD and modestly with brachial artery diameter, AoD, AoS, and AoEM.In multivariate analysis, carotid IMT (beta=-0.323, P < 0.0001) and brachial artery diameter (beta = -0.259, P = 0.001) were significant independent predictors of CFR. The left ventricular mass index (beta= 0.371, P < 0.0001), brachial EDD (beta = -0.232, P = 0.002), and CFR (beta = -0.228, P = 0.003) were significant predictors for IMT. CONCLUSION: Transthoracic CFR correlated significantly with well-established noninvasive predictors of atherosclerosis, and we suggest that it can be used as a surrogate for coronary atherosclerosis. 相似文献
17.
Coronary lesion type, location, and characteristics of acute ST elevation myocardial infarction in young adults under 35 years of age 总被引:1,自引:0,他引:1
OBJECTIVE: In the present study, we attempted to analyze the coronary artery lesion characteristics of acute ST elevation myocardial infarction (STEMI) in young patients (aged less than 35 years). METHODS: We retrospectively surveyed 25 038 coronary angiography procedures, which were carried out at The Baskent University Adana Hospital from 1998 to present, to discover acute STEMI in young patients. We studied clinical risk factors and angiographic characteristics in 42 consecutive patients who underwent primary coronary angiography for acute STEMI. Control group (n=42) had no history of coronary artery disease and had angiographically proven normal coronary arteries. All patients were under 35 years of age. Angiographic features for STEMI group were collected and both groups were compared for coronary risk factors. RESULTS: Male sex was more prevalent in acute STEMI group when compared with control participants (83 vs. 59%, respectively; P=0.01). A significant difference was found in cigarette smoking (62 vs. 36%, respectively; P=0.007) and family history (33 vs. 16%, respectively; P=0.03) between the two groups. No statistical significance was observed between the groups in terms of hypertension, diabetes mellitus, total cholesterol, low-density lipoprotein cholesterol, and triglyceride levels. Mean high-density lipoprotein cholesterol level was 33+/-8 mg/dl in STEMI group and 39+/-12 mg/dl in control participants (P=0.02). Young patients with acute STEMI showed a preponderance of single-vessel disease (69%) and acute anterior STEMI (60%) owing to occluded left anterior descending artery (P<0.001). CONCLUSION: We observed risk factors such as family history, smoking, and low high-density lipoprotein cholesterol levels in young adults. Acute anterior STEMI owing to occluded left anterior descending artery was more frequent. Coronary atherosclerosis was characterized by higher presence of type B and proximal lesions. The handling selection was percutaneous coronary intervention in more than half of the patients. 相似文献
18.
Hüseyin Per Mehmet CanpolatHakan Gümüş Hatice Gamze PoyrazoğluAli Yıkılmaz Sarper KaraküçükHakkı Doğan Sefer Kumandaş 《Brain & development》2013
Objective: Pseudotumor cerebri (PTC) is a clinical condition characterized by signs and symptoms of increased intracranial pressure, such as headache and papilledema. Our aim was to investigate the etiological and clinical features of pseudotumor cerebri (PTC) in children. Materials and method: We performed a comprehensive analysis of epidemiology, diagnostic work-up, therapy, and clinical follow-up in 42 consecutive patients. Results: Totally 42 patients diagnosed with PTC [27 (64.3%) females and 15 (35.7%) males] were included in the study. The average age of the symptoms onset was 10.79 ± 3.43 years (range from 12 months to 17 years). Obesity was found in eleven (26.2%) of them. Two of the patients had familial mediterranean fever, two of them had posttraumatic PTC. The following diseases were one patient, respectively; mycophenolate mofetil-induced PTC, hypervitaminosis A induced PTC, corticosteroid induced withdrawal due to nephritic syndrome, use of oral contraceptives, Guillain–Barre syndrome, urinary tract infection, varicella-zoster virus infection and dural venous sinus thrombosis associated with otitis media. The most common symptom was headache, recorded in 76.2% of the patients. All patients were treated medically. Three patients in our group also required a ventriculoperitoneal shunt. Conclusion: Pseudotumor cerebri is an avoidable cause of visual loss, both in adults and children. Pre-pubertal obese girls are more common. Medical therapy appeared to be successful in treating pediatric PTC in most patients. Nevertheless, despite adequate treatment, children can rarely experience loss of visual field and acuity; thus, prompt diagnosis and management are important. 相似文献
19.
20.
Ozcanli H Keles N Gocmen-Mas N Ozenci AM Aydin AT 《Surgical and radiologic anatomy : SRA》2011,33(8):673-678
Discoid lateral meniscus is a rare disorder and its association with other variations in the knee joint has been reported.
The anterior intermeniscal ligament has also been described as connecting the anterior convex margin of the lateral meniscus
to the anterior horn of the medial meniscus. In the normal population, it was observed at 53–94%. Although the functional
properties of the anterior intermeniscal ligament are not yet clarified, two distinct types of the ligament have been described
according to their morphological characteristics as cord-like and membranous types. The purpose of this study was to evaluate
any possible association between morphologic types of anterior intermeniscal ligament and discoid lateral meniscus. A retrospective
study was designed; 20 discoid lateral menisci were operated using routine arthroscopic examination. Upon arthroscopic examination
the thickness of the ligament and associated morphological changes were recorded systematically. The cord-like anterior intermeniscal
ligament was an associated structure in 15 of the 20 knees with discoid lateral meniscus (75%). Patients with discoid lateral
meniscus apparently have cord-like type anterior intermeniscal ligament, thus we conclude that cord-like type of anterior
intermeniscal ligament is a frequent accompanying structure to discoid lateral meniscus and may have a potential stabilizing
effect on its anterior stability. 相似文献