全文获取类型
收费全文 | 728篇 |
免费 | 40篇 |
国内免费 | 10篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 37篇 |
妇产科学 | 21篇 |
基础医学 | 35篇 |
口腔科学 | 50篇 |
临床医学 | 63篇 |
内科学 | 236篇 |
皮肤病学 | 5篇 |
神经病学 | 32篇 |
特种医学 | 45篇 |
外科学 | 147篇 |
综合类 | 13篇 |
预防医学 | 15篇 |
眼科学 | 20篇 |
药学 | 31篇 |
中国医学 | 1篇 |
肿瘤学 | 17篇 |
出版年
2023年 | 2篇 |
2022年 | 13篇 |
2021年 | 21篇 |
2020年 | 9篇 |
2019年 | 16篇 |
2018年 | 28篇 |
2017年 | 36篇 |
2016年 | 28篇 |
2015年 | 32篇 |
2014年 | 29篇 |
2013年 | 57篇 |
2012年 | 51篇 |
2011年 | 57篇 |
2010年 | 33篇 |
2009年 | 42篇 |
2008年 | 50篇 |
2007年 | 57篇 |
2006年 | 37篇 |
2005年 | 44篇 |
2004年 | 42篇 |
2003年 | 31篇 |
2002年 | 25篇 |
2001年 | 13篇 |
2000年 | 7篇 |
1999年 | 13篇 |
1998年 | 3篇 |
1995年 | 2篇 |
排序方式: 共有778条查询结果,搜索用时 15 毫秒
91.
Hüseyin Sürücü M.D. Ersan Tatlı M.D. Hakkı Boz M.D. Mehmet Meriç M.D. 《Echocardiography (Mount Kisco, N.Y.)》2010,27(4):378-383
Background: We aim to evaluate left ventricular (LV) function abnormalities, especially circumferential contraction functions, in obese patients. Method: Cases without coronary artery disease (CAD) were divided into two groups according to their body mass indexes (BMI). Results: Female predominance (P = 0.002), systolic blood pressure (BP) (P = 0.001), diastolic BP (P = 0.001), waist circumference (P < 0.001), left atrium (P < 0.001), LV end‐diastolic diameter (P = 0.046), LV mass index (P = 0.001), and LV stroke volume (P = 0.016) were prominent in obese patients (BMI ≥ 27). In obese patients, transmitral late velocity (P = 0.005) was prominent, and pulmonary vein antegrade diastolic velocity (PV‐D) (P = 0.002) and mitral annular early diastolic pulsed‐wave tissue Doppler imaging (pw‐TDI) velocity (annular Ea) (P = 0.032) were lower. Transmitral late velocity was positively correlate with stroke volume (P = 0.029) and systolic BP (P < 0.001). Negatively correlation between PV‐D and diastolic BP (P = 0.046) was found. And also, annular Ea velocity was negatively correlate with systolic BP (P = 0.017) and diastolic BP (P = 0.031). These findings may reflect LV longitudinal contraction abnormalities (LVLCA) and underlying mechanism that is responsible for LVLCA, may be volume and afterload alterations. However, LV circumferential contraction functions that evaluate by using pw‐TDI, were not different among the groups. Conclusion: In obese patients without CAD, it was clearly said that while LVLCA were evident, LV circumferential contraction abnormalities were not. This differentiation may be explained by subepicardial myocardial fiber that is responsible for LV circumferential contractions is supplied by coronary arteries, subendocardial myocardial fiber that is responsible for LV longitudinal contractions, is supplied by systemic circulation via LV cavity penetration. (ECHOCARDIOGRAPHY 2010;27:378‐383) 相似文献
92.
We aimed to investigate the frequency of rheumatic diseases in patients suffering from autoimmune thyroid diseases (ATD).
Sixty-five patients (56 F, 9 M), who were followed by diagnosis of ATD, were questioned and examined for the presence of rheumatic
disease. Basic laboratory tests and antithyroid antibodies, antinuclear antibody and rheumatoid factor (RF) levels were also
measured by appropriate methods. Various rheumatic diseases were detected in 40 (62%) of patients with ATD. The most frequent
rheumatic conditions were fibromyalgia, recurrent aphthous stomatitis, osteoarthritis, keratoconjunctivitis sicca and xerostomia
and carpal tunnel syndrome which were detected in 20 (31%), 13 (20%), 10 (15%), 9 (14%) and 8 (12%) of patients, respectively.
Autoimmune diseases, except Sjogren’s syndrome, which were detected in ten patients with ATD, are as follows—vitiligo: two;
autoimmune hepatitis: two; oral lichen planus: one, ulcerative colitis: one, inflammatory arthritis in four patients (two
of them had rheumatoid arthritis, one had psoriasis and psoriatic arthritis and one had mixed collagen tissue disease). RF
was positive in two patients, one of them had rheumatoid arthritis and FANA was positive in six (9%) patients; all of them
had hypothyroidism. The frequency of rheumatic diseases seems to be higher in patients suffering from ATD. Initial evaluation
and a regular checking for rheumatic diseases in patients suffering from ATD were recommended. 相似文献
93.
Early medical treatment is life saving in acute Budd-Chiari due to polycythemia vera 总被引:3,自引:0,他引:3
Karti SS Yilmaz M Kosucu P Altun E Kesen J Arslan M Ozgur O Ovali E 《Hepato-gastroenterology》2003,50(50):512-514
Here we describe two women with polycythemia vera presented with fulminant hepatic failure due to acute Budd-Chiari syndrome. Both had a history of severe abdominal pain and distention of short duration. Clinical and laboratory findings showed fulminant hepatic failure due to acute Budd-Chiari syndrome. Diagnosis was confirmed with abdominal ultrasonography and Doppler ultrasonography showing ascites, hepatomegaly, portal hypertension and total occlusion of hepatic veins. Complete blood count and other clinical findings were compatible with polycythemia vera in both patients. Patients were treated successfully with early administration of continuous heparin infusion, repeated phlebotomies and hydroxyurea. We emphasize here early diagnosis and effective treatment in such fulminant cases may be life saving. 相似文献
94.
Suna Kose Ozkan Karaman Huray Islekel Nevin Uzuner Arzu Babayigit Duygu Olmez Zekiye Altun Sule Turgut Dilek Tezcan 《Allergy and asthma proceedings》2007,28(2):199-203
The aim of this study was to evaluate respiratory function tests, total eosinophil counts, serum immune globulin E (IgE), and serum concentrations of soluble intercellular adhesion molecule (sICAM)1, soluble vascular cell adhesion molecule (sVCAM) 1, and soluble P-selectin (sP-selectin) levels in the children with mild and/or moderate asthma before and 3 months after inhaled steroids and to determine whether adhesion molecule levels showed any difference between asthmatic and healthy children and whether these levels changed with disease activity. A total of 28 children with bronchial asthma and 24 children as a control group were included in the study. All of the patients in the study group were administered inhaled budesonide treatment. The patients were reevaluated 3 months later. Respiratory functions tests were performed and total eosinophil count and serum total IgE level were determined. Serum levels of sICAM-1, sVCAM-1, and sP-selectin were determined and skin-prick tests were performed. Significant difference paralleled to clinical improvement was found in the study group for respiratory function tests, total eosinophil count, serum IgE level, and sICAM-1 levels determined before and after the treatment. However, no significant difference was found for sP-selectin and sVCAM-1 levels before and after the treatment. The higher level of sICAM-1 before the treatment suggests that leukocyte-endothelial adhesion have a role in bronchial asthma, which is an inflammatory airway disease. Reduction in the level of sICAM-1 after the treatment may be related to the decreased inflammation in response to therapy. However, no strong relationships were found between the determinants representing the inflammation and respiratory function tests. 相似文献
95.
Atsushi?TanakaEmail author Xiong?Ma Osamu?Yokosuka Martin?Weltman Hong?You Deepak?N.?Amarapurkar Yoon?Jun?Kim Zaigham?Abbas Diana?A.?Payawal Ming-Ling?Chang Cumali?Efe Ersan?Ozaslan Masanori?Abe Robert?Mitchell-Thain Mikio?Zeniya Kwang?Hyub?Han John?M.?Vierling Hajime?Takikawa 《Hepatology International》2016,10(6):909-915
During the 25th annual meeting of the Asia–Pacific Association for the Study of the Liver (APASL 2016) in Tokyo, we organized and moderated an inaugural satellite symposium on the autoimmune liver diseases, autoimmune hepatitis (AIH) and primary biliary cholangitis (PBC). Following the keynote lecture by John M. Vierling (USA), speakers from the Asia–Pacific region provided an up-to-date perspective on the epidemiology, clinical practice and research in AIH and PBC in the Asia–Pacific region. Although epidemiology and clinical features of AIH seem to be similar in East Asia compared to those in western countries, the majority of patients with AIH are detected at an advanced stage and have higher mortality rates in South Asia, indicating an unmet need for earlier diagnosis and the initiation of appropriate immunosuppressive treatment. PBC is more commonly seen in Australia and East Asia. As of 2016, clinical practice guidelines (CPG) for PBC have been published in Japan and China. Ursodeoxycholic acid (UDCA) is recommended as a first-line therapy by both CPG. Nevertheless, one of the unmet therapeutic needs in PBC is the treatment of patients refractory to or intolerant of UDCA. It is of interest that the prevalence of chronic hepatitis B (CHB) in PBC patients was low in Taiwan and mainland China where the prevalence of CHB is very high. In this review, we overview this exciting and epoch-making symposium. 相似文献
96.
H pylori infection and other risk factors associated with peptic ulcers in Turkish patients: A retrospective study 总被引:1,自引:0,他引:1
Salih BA Abasiyanik MF Bayyurt N Sander E 《World journal of gastroenterology : WJG》2007,13(23):3245-3248
AIM: To identify and evaluate the relative impact of H pylori infection and other risk factors on the occurrence of gastric ulcer (GU), duodenal ulcer (DU) and gastritis in Turkish patients. METHODS: A total of 4471 patients (48.3% female) out of 4863 attended the Samatya hospital in Istanbul (June 1999 - October 2003) were included. The records of H pylori status (CLO-test), endoscopic f indings of GU, DU and gastritis, personal habits (smoking, alcohol intake) and medication [non-steroidal anti-inflammatory drugs (NSAIDs), aspirin intake] were analyzed using multi-way frequency analysis. RESULTS: We have found that GU in the presence of H pylori had significant association with aspirin (P = 0.0001), alcohol (P = 0.0090) and NSAIDs (P = 0.0372). DU on the other hand had significant association with aspirin/ smoking/NSAIDs (P = 0.0259), aspirin/alcohol (P = 0.0002) and aspirin/smoking (P = 0.0233), also in the presence of H pylori. In the absence of H pylori GU had significant association with alcohol/NSAIDs (P = 0.0431), and NSAIDs (P = 0.0436). While DU in the absence of H pylori had significant association with smoking/alcohol/ NSAIDs (P = 0.0013), aspirin/NSAIDs (P = 0.0334), aspirin/alcohol (P = 0.0360). CONCLUSION: In the presence of H pylori, aspirin, alcohol and NSAIDs intake act as an independent risk factors that had an augmenting impact on the occurrence of GU and only together on the occurrence of DU in Turkish patients. 相似文献
97.
目的回顾性研究4所美国大学三级保健中心应用不同钆螯合物对比剂相关的肾源性系统性纤维化(NSF)的基准发生率。材料与方法本研究获健康保险便携性及责任 相似文献
98.
Hrachya Nersesyan Peter Herman Ersan Erdogan Fahmeed Hyder Hal Blumenfeld 《Journal of cerebral blood flow and metabolism》2004,24(9):1057-1068
There is broad agreement that generalized tonic-clonic seizures (GTCS) and normal somatosensory stimulation are associated with increases in regional CBF. However, the data regarding CBF changes during absence seizures are controversial. Electrophysiologic studies in WAG/Rij rats, an established animal model of absence seizures, have shown spike-wave discharges (SWD) that are largest in the perioral somatosensory cortex while sparing the visual cortex. Recent functional magnetic resonance imaging (fMRI) studies in the same model have also shown localized increases in fMRI signals in the perioral somatosensory cortex during SWD. Because fMRI signals are only indirectly related to neuronal activity, the authors directly measured CBF and neuronal activity from specific microdomains of the WAG/Rij cortex using a specially designed probe combining laser-Doppler flowmetry and extra-cellular microelectrode recordings under fentanyl/haloperidol anesthesia. Using this approach, parallel increases in neuronal activity and CBF were observed during SWD in the whisker somatosensory (barrel) cortex, whereas the visual cortex showed no significant changes. For comparison, these measurements were repeated during somatosensory (whisker) stimulation, and bicuculline-induced GTCS in the same animals. Interestingly, whisker stimulation increased neuronal activity and CBF in the barrel cortex more than during SWD. During GTCS, much larger increases that included both the somatosensory and visual cortex were observed. Thus, SWD in this model produce parallel localized increases in neuronal activity and CBF with similar distribution to somatosensory stimulation, whereas GTCS produce larger and more widespread changes. The normal response to somatosensory stimulation appears to be poised between two abnormal responses produced by two physiologically different types of seizures. 相似文献
99.
100.
QT dispersion in hypothyroidism 总被引:1,自引:0,他引:1