全文获取类型
收费全文 | 1905篇 |
免费 | 101篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 67篇 |
儿科学 | 88篇 |
妇产科学 | 194篇 |
基础医学 | 172篇 |
口腔科学 | 79篇 |
临床医学 | 158篇 |
内科学 | 304篇 |
皮肤病学 | 27篇 |
神经病学 | 112篇 |
特种医学 | 109篇 |
外科学 | 430篇 |
综合类 | 31篇 |
预防医学 | 33篇 |
眼科学 | 70篇 |
药学 | 74篇 |
肿瘤学 | 73篇 |
出版年
2024年 | 3篇 |
2023年 | 16篇 |
2022年 | 15篇 |
2021年 | 52篇 |
2020年 | 33篇 |
2019年 | 55篇 |
2018年 | 75篇 |
2017年 | 61篇 |
2016年 | 89篇 |
2015年 | 96篇 |
2014年 | 96篇 |
2013年 | 139篇 |
2012年 | 165篇 |
2011年 | 164篇 |
2010年 | 93篇 |
2009年 | 93篇 |
2008年 | 151篇 |
2007年 | 168篇 |
2006年 | 138篇 |
2005年 | 102篇 |
2004年 | 76篇 |
2003年 | 54篇 |
2002年 | 31篇 |
2001年 | 11篇 |
2000年 | 9篇 |
1999年 | 12篇 |
1998年 | 4篇 |
1997年 | 5篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1991年 | 5篇 |
1990年 | 1篇 |
1985年 | 1篇 |
排序方式: 共有2021条查询结果,搜索用时 15 毫秒
91.
92.
Remzi Arslan Muhammed E. Aydin Mehmet K. Karadag Ozgur Caglar Erdem Karadeniz Mehmet D. Aydin 《Neuropathology》2020,40(5):467-473
Fatal pulmonary edema and hemorrhage are significant complications of endovascular treatment in steno-occlusive carotid artery disease; a rational mechanism has not been adequately examined in the literature so far. We investigated if cervical sympathetic ganglia ischemia prevents pulmonary vasospasm on the prognosis of bilateral common carotid artery ligation (BCCAL). Twenty-three adult New Zealand rabbits (4.2 ± 0.3 kg) were randomly divided into three groups: the control group (G1, n = 5), the sham group (G2, n = 6), and the BCCAL group (G3, n = 12). Common carotid arteries were dissected bilaterally in G2/G3, and permanent BCCAL was applied to only in G3. All animals were followed for 3 weeks and decapitated under general anesthesia. Histopathological changes in stellate ganglia and severity of pulmonary vasospasm-related lung edema and hemorrhage were investigated. Results were analyzed by the Kruskal–Wallis test. Two animals of G3 dead within three weeks and the remainder were sacrificed three weeks later. Subpleural petechial foci and an endotracheal bloody fluid collection were grossly observed in the lungs. Histopathologically, pulmonary artery vasospasm, perivascular and subintimal edema, interalveolar hemorrhage, and alveolar wall destructions were observed with less ischemic-degenerated neuron density-determined stellate ganglia animals. Neurodegeneration of stellate ganglia may have a beneficial effect on the prevention of lung injury during steno-occlusive carotid artery disease. 相似文献
93.
94.
Predictors of in‐hospital mortality in octogenarian patients who underwent primary percutaneous coronary intervention after ST segment elevated myocardial infarction 下载免费PDF全文
95.
Sclerosing mesenteritis: A real manifestation or histological mimic of IgG4‐related disease? 下载免费PDF全文
Mehmet Ozgur Avincsal Kyoko Otani Maki Kanzawa Kohei Fujikura Naoe Jimbo Yukiko Morinaga Takanori Hirose Tomoo Itoh Yoh Zen 《Pathology international》2016,66(3):158-163
We present three cases of sclerosing mesenteritis and review the literature to learn whether or not sclerosing mesenteritis is an IgG4‐related disease (IgG4‐RD). Our patients were all adult males. Their mesenteric masses ranged from 6.5 to 14.5 cm in the greatest diameter. Tissue specimens showed moderate to severe lymphoplasmacytic infiltration with occasional eosinophils against a background of irregular fibrosis. Both obliterative phlebitis and storiform fibrosis were noted in all cases. IgG4+ plasma cells were moderately increased in number (46 to 85 cells/high‐power field). However, unlike IgG4‐RD, the IgG4+/IgG+ plasma cell ratio was <40% (28% to 35%). Serum IgG4 concentrations were also within the normal range (43.2 to 105 mg/dL; normal range <135 mg/dL). Two biopsy cases showed spontaneous regression on imaging approximately 5 months later. No sclerosing conditions were found in other organs. The literature review identified 11 additional cases of sclerosing mesenteritis with IgG4+ plasma cell infiltration. However, conclusive cases with four characteristic features (high serum IgG4 levels, tissue IgG4 elevation, multi‐organ involvement, and effective response to glucocorticoid therapy) have never been reported. In conclusion, although sclerosing mesenteritis shares histological features with IgG4‐RD, most cases are less likely to be IgG4‐related. IgG4‐RD seemingly seldom, if ever, affects this anatomical site. 相似文献
96.
Eda Gurcay Murat Kara Ozgur Zeliha Karaahmet Ayşe Merve Ata Şule Şahin Onat Levent Özçakar 《The Journal of foot and ankle surgery》2017,56(4):783-787
We compared the effectiveness of ultrasound (US)-guided corticosteroid, injected superficial or deep to the fascia, in patients with plantar fasciitis. Thirty patients (24 females [75%] and 6 males [25%]) with unilateral chronic plantar fasciitis were divided into 2 groups according to the corticosteroid injection site: superficial (n = 15) or deep (n = 15) to the plantar fascia. Patient heel pain was measured using a Likert pain scale and the Foot Ankle Outcome Scale (FAOS) for foot disability, evaluated at baseline and repeated in the first and sixth weeks. The plantar fascia and heel pad thicknesses were assessed on US scans at baseline and the sixth week. The groups were similar in age, gender, and body mass index (p > .05 for all). Compared with the baseline values, the Likert pain scale (p < .001 for all) and FAOS subscale (p < .01 for all) scores had improved at the first and sixth week follow-up visits in both groups. Although the plantar fascia thickness had decreased significantly in both groups at the sixth week (p < .001 for both), the heel pad thickness remained unchanged (p > .05 for both). The difference in the FAOS subscales (pain, p = .002; activities of daily living, p = .003; sports/recreational activities, p = .008; quality of life, p = .009) and plantar fascia thickness (p = .049) showed better improvement in the deep than in the superficial injection group. US-guided corticosteroid injections are safe and effective in the short-term therapeutic outcome of chronic plantar fasciitis. Additionally, injection of corticosteroid deep to the fascia might result in greater reduction in plantar fascia thickness, pain, and disability and improved foot-related quality of life. 相似文献
97.
98.
99.
Zeynep Alkan Cakir Ozgur Yigit Ismail Kocak A. Volkan Sunter Muzeyyen Dogan 《Auris, nasus, larynx》2010
Sulcus vocalis is the presence of a groove extending along the vibratory surface of a vocal fold and may result in dysphonia. Depending on the level of severity, this condition may require treatment involving complicated surgical techniques. Cases of sulcus vocalis are classified as physiological, vergeture, or pouch type. A clear explanation of the etiology has not been established, and the currently proposed congenital origin, as described in the literature, remains controversial. This paper presents findings from monozygotic twin sisters with bilateral sulcus vocalis; these patients had similar morphologies, vibratory characteristics, and vocal quality measurements, which support the theory of a congenital etiology. 相似文献
100.
Clement RA Whittle JP Muldoon MR Abadi RV S Broomhead DS Akman O 《Vision research》2002,42(17):2123-2130
Because the oscillatory eye movements of congenital nystagmus vary from cycle to cycle, there is no clear relationship between the waveform produced and the underlying abnormality of the ocular motor system. We consider the durations of successive cycles of nystagmus which could be (1) completely determined by the lengths of the previous cycles, (2) completely independent of the lengths of the previous cycles or (3) a mixture of the two. The behaviour of a deterministic system can be characterised in terms of a collection of (unstable) oscillations, referred to as periodic orbits, which make up the system. By using a recently developed technique for identifying periodic orbits in noisy data, we find evidence for periodic orbits in nystagmus waveforms, eliminating the possibility that each cycle is independent of the previous cycles. The technique also enables us to identify the waveforms which correspond to the deterministic behaviour of the ocular motor system. These waveforms pose a challenge to our understanding of the ocular motor system because none of the current extensions to models of the normal behaviour of the ocular motor system can explain the range of identified waveforms. 相似文献