全文获取类型
收费全文 | 703篇 |
免费 | 43篇 |
国内免费 | 21篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 39篇 |
妇产科学 | 5篇 |
基础医学 | 96篇 |
口腔科学 | 17篇 |
临床医学 | 74篇 |
内科学 | 115篇 |
皮肤病学 | 47篇 |
神经病学 | 28篇 |
特种医学 | 125篇 |
外科学 | 78篇 |
综合类 | 13篇 |
预防医学 | 33篇 |
眼科学 | 23篇 |
药学 | 33篇 |
肿瘤学 | 38篇 |
出版年
2021年 | 15篇 |
2020年 | 3篇 |
2019年 | 3篇 |
2018年 | 3篇 |
2017年 | 7篇 |
2016年 | 9篇 |
2015年 | 12篇 |
2014年 | 14篇 |
2013年 | 22篇 |
2012年 | 12篇 |
2011年 | 18篇 |
2010年 | 34篇 |
2009年 | 39篇 |
2008年 | 23篇 |
2007年 | 40篇 |
2006年 | 26篇 |
2005年 | 20篇 |
2004年 | 19篇 |
2003年 | 6篇 |
2002年 | 15篇 |
2001年 | 21篇 |
2000年 | 9篇 |
1999年 | 17篇 |
1998年 | 39篇 |
1997年 | 37篇 |
1996年 | 31篇 |
1995年 | 30篇 |
1994年 | 14篇 |
1993年 | 20篇 |
1992年 | 6篇 |
1991年 | 10篇 |
1990年 | 13篇 |
1989年 | 15篇 |
1988年 | 20篇 |
1987年 | 16篇 |
1986年 | 13篇 |
1985年 | 16篇 |
1984年 | 7篇 |
1983年 | 8篇 |
1982年 | 12篇 |
1981年 | 7篇 |
1980年 | 11篇 |
1979年 | 4篇 |
1978年 | 10篇 |
1977年 | 6篇 |
1976年 | 7篇 |
1975年 | 5篇 |
1972年 | 3篇 |
1968年 | 3篇 |
1871年 | 2篇 |
排序方式: 共有767条查询结果,搜索用时 15 毫秒
1.
R. H. Acland 《ANZ journal of surgery》2007,77(Z1):A60-A60
Spinal cord stimulation (SCS) involves the use of an epidurally placed, multiple electrode lead. Electrical stimulation between electrodes produces stimulation of the posterior spinal cord and can provide excellent pain relief and increased blood flow in a number of chronic limb pain conditions. Its efficacy has more recently been demonstrated in angina. Chronic stable angina pectoris is a major cause of disability and suffering. The aims of treatment are to prevent MI and death (increase the quantity of life) and reduce the symptoms (improve the quality of life). In the non‐acute condition, practitioners often struggle to manage angina because of a lack of understanding of modern concepts of pain. There is a widely held misconception that only revascularisation improves prognosis in chronic refractory angina‐ the term used to describe patients with stable angina that is treatment refractory. Over the last decade two pain services in New Zealand have been approached by cardiologists to provide spinal cord stimulation for such patients. This has been an intriguing experience! We have demonstrated that the placement of such leads in the lower cervical cord region provides excellent relief of angina. The technology is expensive (akin to the overall cost of CAVG surgery). We have demonstrated cost recoupment, by decreased hospitalisation, at approximately16 months post procedure. Sadly, this therapy has not been embraced. Possible reasons for this will be discussed. The concept of electrically modifying the neuronal signals versus re‐plumbing the blockage appears to be an anathema to cardiologists. 相似文献
2.
A M Hart C J Tollan J Dabernig R Acland I Taggart 《Journal of plastic, reconstructive & aesthetic surgery》2007,60(11):1263-1267
Free flaps have been used for over 30 years. During this period, improved anatomical understanding has increased donor options and available pedicle lengths, permitting safer, single-stage reconstructions with simpler anastomoses. Refinements, such as perforator flaps in particular, have greatly improved donor morbidity, recipient site cosmesis, and the ability to replace 'like with like' while retaining options for innervation. This case highlights the evolution from one of Europe's first free tissue transfers, effectively a perforator flap, through the advent of free muscle flaps to the current generation of contourable perforator flaps. Free flap transfer has become increasingly sophisticated, safer, and more predictable, yet the potential quality of reconstructive outcome has changed little. 相似文献
3.
4.
5.
6.
7.
Kinnison ML; Perler BA; Kaufman SL; Mitchell SE; Kadir S; Williams GM; White RI Jr 《Radiology》1986,160(3):727-730
In situ saphenous vein grafts are being used with increasing frequency for bypass procedures involving the femoral and popliteal arteries. Complications of these procedures include anastomotic stenoses and persistent arteriovenous fistulae that may result in failure of the graft. Balloon angioplasty and embolotherapy with detachable balloons were employed successfully in three or four recent cases of patients with complications from in situ grafts. Tailored angiography is essential for evaluating in situ grafts, and interventional techniques are extremely useful for managing complications. 相似文献
8.
9.
Polycystic kidney disease is an autosomal dominant disease that may be associated with cystic disease of the liver. In women, the cysts may develop early and be more troublesome than in men. Cystadenocarcinoma of the pancreas is uncommon, comprising 1% of primary pancreatic malignancies. This case report is the first to describe a familial association between polycystic kidney disease and cystadenocarcinoma of the pancreas and liver in the English medical literature. A patient with autosomal dominant polycystic kidney disease (ADPKD) and multiple hepatic cysts developed cystadenocarcinoma of the pancreas with multiple malignant liver cysts. The patient's mother, sister, and niece had ADPKD, and the patient's sister also died of pancreatic cystadenocarcinoma. We believe that the development of these two disease entities in which the primary pathology is cyst formation has a genetic association. (Gastroenterology 1997 Jun;112(6):2104-7) 相似文献
10.
Pheochromocytoma and paraganglioma: comparison of MR imaging with CT and I-131 MIBG scintigraphy 总被引:6,自引:0,他引:6
To ascertain the magnetic resonance (MR) imaging characteristics of pheochromocytomas and paragangliomas and to compare MR with computed tomography (CT) and iodine-131 metaiodobenzylguanidine (I-131 MIBG), 19 patients (18 with pheochromocytomas, one with a paraganglioma) were studied. The 18 patients with pheochromocytomas had had positive findings with I-131 MIBG scintigraphy. Abdominal pheochromocytomas were generally hypointense compared with normal liver on T1-weighted MR images and extremely hyperintense on T2-weighted MR images. MR imaging was preferable to CT in the evaluation of primary pheochromocytomas due to superior tissue characterization, particularly in the patient with hypertension and borderline catecholamine levels. For patients with recurrent or metastatic disease, the data suggest that I-131 MIBG scintigraphy is the examination of choice. 相似文献