全文获取类型
收费全文 | 1924篇 |
免费 | 80篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 28篇 |
儿科学 | 64篇 |
妇产科学 | 88篇 |
基础医学 | 115篇 |
口腔科学 | 126篇 |
临床医学 | 160篇 |
内科学 | 356篇 |
皮肤病学 | 17篇 |
神经病学 | 172篇 |
特种医学 | 148篇 |
外科学 | 493篇 |
综合类 | 26篇 |
一般理论 | 1篇 |
预防医学 | 48篇 |
眼科学 | 35篇 |
药学 | 80篇 |
肿瘤学 | 54篇 |
出版年
2024年 | 2篇 |
2023年 | 20篇 |
2022年 | 39篇 |
2021年 | 84篇 |
2020年 | 52篇 |
2019年 | 61篇 |
2018年 | 87篇 |
2017年 | 40篇 |
2016年 | 71篇 |
2015年 | 85篇 |
2014年 | 96篇 |
2013年 | 116篇 |
2012年 | 169篇 |
2011年 | 150篇 |
2010年 | 68篇 |
2009年 | 81篇 |
2008年 | 143篇 |
2007年 | 156篇 |
2006年 | 115篇 |
2005年 | 109篇 |
2004年 | 89篇 |
2003年 | 59篇 |
2002年 | 37篇 |
2001年 | 21篇 |
2000年 | 14篇 |
1999年 | 9篇 |
1998年 | 4篇 |
1997年 | 6篇 |
1996年 | 3篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1990年 | 2篇 |
1989年 | 3篇 |
1987年 | 3篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有2011条查询结果,搜索用时 15 毫秒
21.
Ali Çelik Haldun Akoglu Serhad Omercikoglu Onur Bugdayci Sinan Karacabey Kerem Ali Kabaroglu Ozge Onur Arzu Denizbasi 《The Journal of emergency medicine》2021,60(1):90-97
BackgroundRib fractures are the most common complications of blunt chest trauma (BCT). Computed tomography (CT) is the modality of choice for BCT, but with several disadvantages. Ultrasonography (US) is an inexpensive, readily available, and relatively harmless imaging alternative. However, a direct comparison of the sonographic evaluation of the rib as a whole with CT as a reference has not been performed to date.ObjectiveThis study aimed to compare the diagnostic accuracy of US with CT for the detection of rib fractures in patients who presented to emergency department (ED) with BCT.MethodsWe included a convenience sample of adult patients who presented to the ED with thoracic pain after BCT in the last 24 h in this prospective, observational, diagnostic accuracy study. The diagnostic utility of US performed by an emergency physician was compared with thorax CT.ResultsThe final study population included 145 patients. The diagnostic accuracy of US was 80% with a sensitivity of 91.2% and specificity of 72.7% for the detection of any rib fracture (positive likelihood ratio 3.4 and negative likelihood ratio 0.12). If we considered each rib separately, the sensitivity of US decreased to 76.7% and specificity increased to 82.7% (81.3% accuracy).ConclusionsA negative US of the site of the highest tenderness and neighboring ribs in a patient with BCT who presented to the ED with lateralizing pain decreases the possibility of a rib fracture significantly. However, a positive US performs poorly to specify the exact location and number of the fractured ribs. 相似文献
22.
23.
İbrahim Onur Alici Nilgün Yılmaz Demirci Aydın Yılmaz Funda Demirag Jale Karakaya 《Virchows Archiv : an international journal of pathology》2013,462(3):323-327
We compared the diagnostic performances of conventional smears and cell block preparations of tissue samples obtained with endobronchial ultrasound-guided transbronchial needle aspiration. We retrospectively analysed 451 patients (926 lymph nodes) who had undergone endobronchial ultrasound and for whom both smears and cell blocks were available and compared the diagnostic performances of these techniques when used alone and combined. Cell block preparations showed higher diagnostic performance over smears, but the combination was superior to either alone. The combination of smear and cell block techniques achieved a sensitivity, specificity and positive and negative predictive values of 92.5, 100, 100, 97.7 and 99.4, 95.0, 98.6, and 97.9 % for malignant and benign diseases, respectively. We recommend cell block preparations during endobronchial ultrasound-guided transbronchial needle aspiration. 相似文献
24.
Kuyumcu Serkan Isik Emine Goknur Tiryaki Tarik Onur Has-Simsek Duygu Sanli Yasemin Buyukkaya Fikret Özkan Zeynep Gözde Kalayoglu-Besisik Sevgi Unal Seher Nilgun 《Annals of nuclear medicine》2021,35(10):1147-1156
Annals of Nuclear Medicine - This study investigates the prognostic value of 68Ga-Pentixafor PET/CT using PET-derived quantitative in multiple myeloma (MM) patients with suspected recurrence in... 相似文献
25.
26.
Ali Devrim Karaosmano?lu Mehmet Ruhi Onur Ali Shirkhoda Mustafa Ozmen Peter F. Hahn 《Korean journal of radiology》2015,16(4):853-859
Malignant kidney neoplasms are the most frequently encountered solid kidney masses. Although renal cell carcinoma is the major renal malignancy, other solid malignant renal masses should be considered in the differential diagnosis of solid renal masses that do not contain a macroscopic fatty component. In this pictorial essay, we present the imaging findings of a primitive neuroectodermal tumor, primary liposarcoma of the kidney, primary neuroendocrine tumor, leiomyosarcoma, synovial sarcoma, malignant fibrous histiocytoma, sclerosing fibrosarcoma and renal metastasis of osteosarcoma. 相似文献
27.
28.
29.
Fatih Ceran Salih Onur Basat Karaca Basaran Funda Akoz Saydam 《Journal of hand and microsurgery》2015,7(1):228-229
Trigger finger (TF) is a condition that affects quality of life and one of the most common causes of hand pain and disability. TF is characterized by catching, snapping or locking of the involved finger flexor tendon, associated with pain. TF in the children occurs rarely than in adults and partial tendon laceration is an uncommon cause of TF in the children. Thus, our aim in this study to define TF due to partial flexor tendon laceration in a child.
Electronic supplementary material
The online version of this article (doi:10.1007/s12593-015-0180-8) contains supplementary material, which is available to authorized users. 相似文献30.