全文获取类型
收费全文 | 4661篇 |
免费 | 190篇 |
国内免费 | 28篇 |
专业分类
耳鼻咽喉 | 80篇 |
儿科学 | 115篇 |
妇产科学 | 174篇 |
基础医学 | 462篇 |
口腔科学 | 54篇 |
临床医学 | 356篇 |
内科学 | 1268篇 |
皮肤病学 | 82篇 |
神经病学 | 658篇 |
特种医学 | 140篇 |
外科学 | 652篇 |
综合类 | 7篇 |
一般理论 | 2篇 |
预防医学 | 143篇 |
眼科学 | 143篇 |
药学 | 224篇 |
中国医学 | 22篇 |
肿瘤学 | 297篇 |
出版年
2023年 | 46篇 |
2022年 | 90篇 |
2021年 | 147篇 |
2020年 | 95篇 |
2019年 | 105篇 |
2018年 | 141篇 |
2017年 | 92篇 |
2016年 | 118篇 |
2015年 | 116篇 |
2014年 | 188篇 |
2013年 | 227篇 |
2012年 | 361篇 |
2011年 | 338篇 |
2010年 | 208篇 |
2009年 | 199篇 |
2008年 | 316篇 |
2007年 | 280篇 |
2006年 | 262篇 |
2005年 | 277篇 |
2004年 | 224篇 |
2003年 | 213篇 |
2002年 | 188篇 |
2001年 | 57篇 |
2000年 | 56篇 |
1999年 | 51篇 |
1998年 | 39篇 |
1997年 | 27篇 |
1996年 | 29篇 |
1995年 | 36篇 |
1994年 | 26篇 |
1993年 | 13篇 |
1992年 | 33篇 |
1991年 | 36篇 |
1990年 | 21篇 |
1989年 | 27篇 |
1988年 | 22篇 |
1987年 | 13篇 |
1986年 | 12篇 |
1985年 | 15篇 |
1984年 | 22篇 |
1983年 | 14篇 |
1982年 | 8篇 |
1981年 | 9篇 |
1980年 | 13篇 |
1979年 | 10篇 |
1978年 | 7篇 |
1977年 | 6篇 |
1975年 | 4篇 |
1974年 | 7篇 |
1965年 | 3篇 |
排序方式: 共有4879条查询结果,搜索用时 31 毫秒
51.
52.
Mauro Tarallo Mariangela Ciotti Alessia Pollastrini Vittoria Amorosi Pasquale Fino 《European journal of plastic surgery》2013,36(10):665-668
Polydactyly is a fairly common congenital anomaly characterized by additional fingers and/or toes, generally divided into three groups: medial ray (preaxial) and central and lateral ray (postaxial). We present a case of postaxial (fibular) polydactyly of the feet, assaying its clinical and radiological features and the method of surgical correction. Clinical outcomes after initial surgery were excellent in both feet. This surgical case shows that a careful individual preoperative planning is necessary to achieve good functional and cosmetic outcome. Level of Evidence: Level V, therapeutic study. 相似文献
53.
54.
Pasquale Palmiero M.D. Maria Maiello M.D. David D. Daly Jr. M.D. Marco Matteo Ciccone M.D. Navin C. Nanda M.D. 《Echocardiography (Mount Kisco, N.Y.)》2012,29(10):1233-1238
Objective: The first goal of our study was to investigate major determinants of aortic stiffness in postmenopausal women using an echocardiographic method to calculate global pulse wave velocity (PWVg) rather than the less accurate carotid–femoral pulse wave velocity (PWVc). The second goal was to relate PWVg to the absolute risk of major cardiovascular (CV) events estimated by CV risk factors. Patients and methods: Two hundred forty‐four consecutive women who presented to our heart station were screened. One hundred twenty‐two were postmenopausal, either natural or surgical, whereas 122 were premenopausal. The mean age of the patients was 54 ± 13 years. Individuals were categorized as current smokers, former smokers, or nonsmokers and hypertensive or not. Hypercholesterolemia and diabetes mellitus were defined. Aortic stiffness was assessed by PWVg measured with pulsed Doppler, the interval between the beginning of QRS complex and the foot of the systolic upstroke in the Doppler spectral envelope was calculated at the aortic valve site and at the right common femoral artery. PWVg was calculated between the aortic valve and right common femoral artery by dividing the straight line distance between the two by the transit time. Results: There was a highly significant statistical difference (P < 0.0012) in PWVg between menstruating women and postmenopausal women. Similarly, this difference in PWVg was also noted among the menstruating population (P < 0.0014) when comparing normotensive women and hypertensive women. In postmenopausal women, PWVg was 6.8 m/sec in normotensive women and 7.56 m/sec in hypertensive women (P < 0.007). Conclusion: PWVg was increased in postmenopausal women compared with menstruating women. Systemic hypertension has an independent, but additive effect on aortic stiffness assessed by PWVg. Our study supports the usefulness of the assessment of aortic stiffness as a marker of CV disease and to identify subjects at risk at an early age. 相似文献
55.
L. Padua G. Liotta A. Di Pasquale G. Granata C. Pazzaglia P. Caliandro C. Martinoli 《European journal of neurology》2012,19(1):47-54
Background and purpose: Recently, ultrasound (US) has been used to assess the peripheral nervous system; however, there is no real study about its possible significant role in routine practice. Our study aims to assess the contribution of US as a routine tool in a neurophysiological laboratory. Methods: The study assesses 130 patients who presented clinical suspicion of peripheral nerve diseases, excluding motor neuron disease, radiculopathy, hereditary and acquired polyneuropathy. All patients were clinically, neurophysiologically and sonographically assessed in the same session by the same neurologist/neurophysiologist. To avoid interpretation bias, two independent and blinded clinicians, different than the examiners performing electrodiagnosis and US, reviewed clinical, neurophysiological and US findings (also data about follow‐up, when available) and classified the contribution of US as follows: Contributive (US had influence on the diagnostic and therapeutic strategies), Confirming (US confirmed the clinical and neurophysiological diagnosis), Non‐Confirming (US findings were normal) and Incorrect (US findings led to incorrect diagnosis). Results: US impacted, namely modified the diagnostic and therapeutic path in 42.3% of cases (55 patients); US had a confirmatory role in 40% (52 patients); US did not confirm clinical and neurophysiological diagnosis in 17.7% (23 cases); no incorrect US findings were observed. Conclusion: US complements neurophysiological assessment even in routine practice, and this confirms the increasing interest in US for a multidimensional evaluation of peripheral nerve system diseases. 相似文献
56.
Gianluca Cinotti Pasquale Sessa Giovanni Ragusa Francesca Romana Ripani Roberto Postacchini Raffaele Masciangelo Giuseppe Giannicola 《Clinical anatomy (New York, N.Y.)》2013,26(7):883-892
We analyzed the magnetic resonance studies of the knee in 80 subjects, 45 men and 35 women with a mean age of 38.9 years, who showed no pathological condition of the joint. Using an imaging visualization software, the sagittal longitudinal axis of the tibia was identified. The angle between this axis and a line tangent to the bone profile of the tibial plateau (bone slope) and to the superior border of the menisci (meniscal slope) were calculated. Thickness of anterior and posterior portion of menisci and underlying cartilage were also measured. The bone slope averaged 8° and 7.7° on the medial and lateral sides, respectively. The mean meniscal slope was 4.1° and 3.3° on the medial and lateral sides, respectively, with a significant difference compared with the bone slope. Menisci and underlying cartilage were significantly thicker in their posterior than their anterior portion (7.6 and 5.2 mm, respectively, in the medial compartment; 8.6 and 5.2 mm, respectively, in the lateral compartment). The presence of cartilage and menisci implies a significant decrease in the posterior tibial slope. In the lateral compartment, the greater the bone slope, the larger the difference between bone and meniscal slope, which means that a marked posterior tilt of the lateral tibial plateau is decreased by the cartilage and meniscus. These findings should be taken into account in planning surgical procedures which affect the slope of the articular tibial surface. Clin. Anat. 26:883–892, 2013. © 2012 Wiley Periodicals, Inc. 相似文献
57.
Italian Chapter of the International Society of Cardiovascular Ultrasound expert consensus document on coronary computed tomography angiography: overview and new insights
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Fabiola B. Sozzi M.D. Ph.D. Maria Maiello M.D. Francesco Pelliccia M.D. Ph.D. Vito Maurizio Parato M.D. Ciro Canetta M.D. Ketty Savino M.D. Federico Lombardi M.D. Pasquale Palmiero M.D. the Italian Chapter of the International Society of Cardiovascular Ultrasound 《Echocardiography (Mount Kisco, N.Y.)》2016,33(9):1413-1418
Coronary computed tomography angiography is a noninvasive heart imaging test currently undergoing rapid development and advancement. The high resolution of the three‐dimensional pictures of the moving heart and great vessels is performed during a coronary computed tomography to identify coronary artery disease and classify patient risk for atherosclerotic cardiovascular disease. The technique provides useful information about the coronary tree and atherosclerotic plaques beyond simple luminal narrowing and plaque type defined by calcium content. This application will improve image‐guided prevention, medical therapy, and coronary interventions. The ability to interpret coronary computed tomography images is of utmost importance as we develop personalized medical care to enable therapeutic interventions stratified on the bases of plaque characteristics. This overview provides available data and expert's recommendations in the utilization of coronary computed tomography findings. We focus on the use of coronary computed tomography to detect coronary artery disease and stratify patients at risk, illustrating the implications of this test on patient management. We describe its diagnostic power in identifying patients at higher risk to develop acute coronary syndrome and its prognostic significance. Finally, we highlight the features of the vulnerable plaques imaged by coronary computed tomography angiography. 相似文献
58.
59.
Pasquale Spataro Angela Di Pietro Maria Elena Scoglio Giuseppa Visalli Cristina Chirico Isa Picerno 《Renal failure》2013,35(5):441-448
Introduction. Recently, the identification of the SEN virus as a possible etiological agent of parental transmission hepatitis led to the study of the prevalence of such pathogen agents, particularly SENV-H, in our population. This paper compares the rate prevalence in high-risk subjects, such as dialysis patients, and low-risk subjects, such as blood donors. Material and Methods. The study was carried out on SEN virus DNA extracted from serum of dialysis patients and blood donors, and the presence of viral genomes was performed by the nested PCR method. Results. The results showed a higher prevalence in male blood donors, supporting the hypothesis of an epidemiological role for sexual and also parental transmission, as is clearly demonstrated by the high prevalence in dialysis patients. The result reduced the importance of the possible etiological role of the SEN virus due to the high percentage of positivity in healthy population, and it induces one to consider poorly significant the pathogenicity of such viral agents. Conclusion. For this instance, the authors, in agreement with the phylogenically related TT virus, described SEN viruses as absolutely not pathogens and considered them as “simple guests.” 相似文献
60.