全文获取类型
收费全文 | 2801篇 |
免费 | 141篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 16篇 |
儿科学 | 133篇 |
妇产科学 | 70篇 |
基础医学 | 329篇 |
口腔科学 | 62篇 |
临床医学 | 251篇 |
内科学 | 588篇 |
皮肤病学 | 55篇 |
神经病学 | 133篇 |
特种医学 | 123篇 |
外科学 | 458篇 |
综合类 | 46篇 |
一般理论 | 2篇 |
预防医学 | 129篇 |
眼科学 | 73篇 |
药学 | 255篇 |
中国医学 | 7篇 |
肿瘤学 | 226篇 |
出版年
2023年 | 25篇 |
2022年 | 58篇 |
2021年 | 132篇 |
2020年 | 49篇 |
2019年 | 64篇 |
2018年 | 99篇 |
2017年 | 65篇 |
2016年 | 59篇 |
2015年 | 63篇 |
2014年 | 101篇 |
2013年 | 122篇 |
2012年 | 212篇 |
2011年 | 217篇 |
2010年 | 119篇 |
2009年 | 130篇 |
2008年 | 144篇 |
2007年 | 158篇 |
2006年 | 135篇 |
2005年 | 102篇 |
2004年 | 102篇 |
2003年 | 98篇 |
2002年 | 59篇 |
2001年 | 52篇 |
2000年 | 55篇 |
1999年 | 47篇 |
1998年 | 36篇 |
1997年 | 29篇 |
1996年 | 25篇 |
1995年 | 18篇 |
1994年 | 19篇 |
1993年 | 13篇 |
1992年 | 25篇 |
1991年 | 21篇 |
1990年 | 23篇 |
1989年 | 21篇 |
1988年 | 25篇 |
1987年 | 28篇 |
1986年 | 23篇 |
1985年 | 25篇 |
1984年 | 16篇 |
1983年 | 18篇 |
1982年 | 7篇 |
1981年 | 8篇 |
1979年 | 15篇 |
1977年 | 7篇 |
1976年 | 7篇 |
1975年 | 8篇 |
1974年 | 11篇 |
1973年 | 11篇 |
1971年 | 11篇 |
排序方式: 共有2956条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Alok D. Gandhi Rohit A. Patel Robert E. Brolin 《Surgery for obesity and related diseases》2009,5(2):144-149
BackgroundMesenteric internal hernia (MIH) is the most common cause of small bowel obstruction (SBO) after laparoscopic Roux-en-Y gastric bypass. Because MIH is a potentially life-threatening complication, we hypothesized that elective repair of MIH before developing acute SBO could decrease morbidity in this population.MethodsThe records of 702 consecutive patients undergoing primary laparoscopic Roux-en-Y gastric bypass from January 2002 and August 2007 were retrospectively reviewed to determine the incidence and etiology of SBO. During the last 9 months of the study, we offered elective laparoscopy to any patient who presented to us with symptoms of intermittent SBO.ResultsOf the 702 patients, 27 (3.8%) developed acute SBO. Of these 27 patients, 15 (55%) had obstruction related to an MIH. Nearly all patients had a typical history of intermittent abdominal pain, nausea, and bloating before developing acute SBO. Elective laparoscopy was offered to 11 patients with symptoms of intermittent SBO. Two patients who refused subsequently underwent operations for acute SBO. MIH was found at elective laparoscopic exploration in all cases. Of the 9 patients undergoing elective surgery, 3 (33%) had small bowel volvulus.ConclusionSBO due to MIH after laparoscopic Roux-en-Y gastric bypass is typically preceded by symptoms of intermittent obstruction. Patients who have these herald symptoms should promptly be offered elective laparoscopic exploration. Elective repair of MIH can be performed safely and expeditiously. 相似文献
5.
The talar beak is a well-described secondary sign of talocalcaneal coalition but is not pathognomonic of the condition and may be seen in other causes of restricted or abnormal subtalar motion. We present an unusual complication of talar beaks in two patients who sustained fractures through their beaks. One of the patients described did not have a talocalcaneal coalition but had developed a beak following a compound fracture dislocation of the ankle joint complicated by infection, a previously undescribed predisposing cause. 相似文献
6.
The effects of the calcium antagonists verapamil and nifedipine on blood glucose levels, glucose tolerance, insulin secretion during glucose tolerance and hypoglycaemic effect of tolbutamide were studied in normal nondiabetic rabbits. Daily dosage of 40 mg/kg verapamil and 5 mg/kg nifedipine given orally up to 7 days did not affect blood glucose level, glucose tolerance, insulin secretion during glucose tolerance and hypoglycaemic activity of tolbutamide 250 mg/kg p.o. 相似文献
7.
To investigate whether the secular trend for growth in Dutch children still exists, the Oosterwolde I study of 1980 was repeated in 1989. A persisting secular trend was visible for height while the z scores of body proportions show no change during the past 10 years, which suggests that there is no change in the timing of puberty. 相似文献
8.
Computed tomography and magnetic resonance angiography in cervicocranial vascular disease. 总被引:4,自引:0,他引:4
Dheeraj Gandhi 《Journal of neuro-ophthalmology》2004,24(4):306-314
Although catheter angiography, or digital subtraction angiography (DSA), is still regarded as the gold standard for imaging of cervicocranial vascular disease, its morbidity, cost, and time-consuming features have prompted the development of noninvasive techniques based on computed tomography (CT) and magnetic resonance imaging. With the advent of powerful software, CT and magnetic resonance angiography are complementing and, in some cases, even replacing DSA in the diagnostic evaluation of carotid atherostenosis, unruptured aneurysms, dissections, stroke, penetrating trauma to the neck, and dural venous sinus occlusive disease. They offer advantages over DSA not only in reduced morbidity and time-saving but also in assessment of brain parenchyma, quantitative perfusion, and abnormalities of vessel walls. In the evaluation of blunt neck injuries and intracranial vascular malformations, fistulas, and vasculitis, CT and magnetic resonance angiography still do not provide as much information as DSA. 相似文献
9.
Powel?KazanjianEmail author Wei?Wei Morton?Brown Tejal?Gandhi Kamal?Amin 《Journal of translational medicine》2005,3(1):40
Background
A sizeable number of HIV-infected patients receiving HAART do not maintain prolonged virologic suppression. We evaluated long-term HIV viral load (VL) responses to HAART as a risk factor for AIDS events (AE) that is independent of CD4 responses. 相似文献10.
Idrees M Gandhi C Betchen S Strauchen J King W Wolfe D 《Archives of pathology & laboratory medicine》2005,129(1):e11-e15
Peripheral primitive neuroectodermal tumors (pPNETs) are aggressive, poorly differentiated neoplasms that occur in children and young adults. These tumors are associated with a peak incidence in the second decade and a slight male preponderance. Recently, Ewing sarcoma and pPNET tumors have been proven to carry identical translocations, the most common being t(11;22)(q24;q12). Intracranial Ewing sarcoma/pPNETs have rarely been described in the literature. We studied a case of intracranial pPNET arising in the right cavernous sinus of a 46-year-old man. On imaging, the tumor had both sellar and suprasellar components and was centered within the right parasellar region. Histologically, the tumor was composed of intermediate to large cells with round to oval hyperchromatic nuclei with distinct nucleoli. The cells contained a moderate amount of slightly basophilic cytoplasm. The tumor was markedly fibrotic and had collagen bands surrounding both individual and groups of cells. A large immunohistochemical panel was positive only for CD99 and vimentin. Fluorescence in situ hybridization did not show translocations associated with Ewing sarcoma/pPNET. However, a small percentage of these tumors can be negative for this translocation. In these cases, histology and immunohistochemical techniques in the absence of an alternative diagnosis are the only tools available to establish the diagnosis. 相似文献