全文获取类型
收费全文 | 1089篇 |
免费 | 57篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 36篇 |
妇产科学 | 23篇 |
基础医学 | 97篇 |
口腔科学 | 10篇 |
临床医学 | 158篇 |
内科学 | 244篇 |
皮肤病学 | 12篇 |
神经病学 | 36篇 |
特种医学 | 121篇 |
外科学 | 132篇 |
综合类 | 131篇 |
一般理论 | 4篇 |
预防医学 | 28篇 |
眼科学 | 11篇 |
药学 | 46篇 |
肿瘤学 | 55篇 |
出版年
2021年 | 27篇 |
2019年 | 16篇 |
2018年 | 16篇 |
2017年 | 10篇 |
2016年 | 12篇 |
2015年 | 25篇 |
2014年 | 28篇 |
2013年 | 38篇 |
2012年 | 44篇 |
2011年 | 29篇 |
2010年 | 42篇 |
2009年 | 39篇 |
2008年 | 35篇 |
2007年 | 34篇 |
2006年 | 35篇 |
2005年 | 30篇 |
2004年 | 41篇 |
2003年 | 29篇 |
2002年 | 35篇 |
2001年 | 27篇 |
2000年 | 24篇 |
1999年 | 27篇 |
1998年 | 41篇 |
1997年 | 31篇 |
1996年 | 31篇 |
1995年 | 18篇 |
1994年 | 39篇 |
1993年 | 12篇 |
1992年 | 15篇 |
1991年 | 13篇 |
1990年 | 21篇 |
1989年 | 19篇 |
1988年 | 25篇 |
1987年 | 29篇 |
1986年 | 29篇 |
1985年 | 28篇 |
1984年 | 16篇 |
1983年 | 11篇 |
1982年 | 7篇 |
1981年 | 12篇 |
1980年 | 10篇 |
1979年 | 9篇 |
1978年 | 6篇 |
1977年 | 8篇 |
1976年 | 11篇 |
1975年 | 7篇 |
1973年 | 6篇 |
1972年 | 8篇 |
1969年 | 5篇 |
1968年 | 5篇 |
排序方式: 共有1148条查询结果,搜索用时 15 毫秒
1.
2.
J Flamm 《British journal of urology》1990,66(3):286-287
In patients under the age of 40 years with primary superficial bladder cancer the efficacy of adjuvant topical treatment was the same as in elderly patients (recurrences 23%, progression rate 8%). Patients should therefore be treated on the basis of stage and grade of the tumour regardless of their age. 相似文献
3.
Neuroophthalmologic abnormalities and intravascular therapy of traumatic carotid cavernous fistulas 总被引:1,自引:0,他引:1
Traumatic fistulas were successfully embolized using various transvascular approaches in 33 of 34 lesions. Complete superselective angiographic demonstration of the exact site of the shunt and possible collaterals was necessary to choose the appropriate embolization techniques. Improvement in the signs of orbital congestion was seen in all cases. Embolization, which directly occludes the fistula, precludes recurrences via collateralization and restores the normal arteriovenous gradient to the eye and optic nerve. 相似文献
4.
5.
6.
HERMAN TOURNAYE RONNY JANSSENS PAUL DEVROEY RK VAN STEIRTEGHEM 《International journal of andrology》1994,17(1):1-8
In order to evaluate the effects of pentoxifylline on sperm motility and longevity, a controlled in-vitro study was conducted on normozoospermic donor semen samples using the Cellsoft automated system for sperm motility analysis. After incubation and selection, pentoxifylline was found to improve the recovery of spermatozoa and to increase their velocity. In the subgroup of progressively motile spermatozoa, curvilinear velocity was also enhanced. It is concluded that pentoxifylline has an effect on the vigour, but not on the pattern, of sperm motion. Pentoxifylline did not improve the motility characteristics of senescent spermatozoa in normozoospermic sperm samples. Sperm survival, as shown by supra-vital staining, and motility longevity both decreased with time after pentoxifylline treatment. 相似文献
7.
8.
V. JNSSON H. D. SCHRDER W. TROJABORG T. STAEHELIN JENSEN E. HIPPE M. MRK HANSEN 《Journal of internal medicine》1992,232(2):185-191
A study of 17 patients with autoimmune axonal or demyelinating peripheral neuropathy in combination with M-component is described. The M-component was associated with MGUS (monoclonal gammopathy of undetermined significance) in 12 patients, CLL in one patient, WaldenstrÖm's disease in one patient, and myeloma in three patients. Immunohistological examination with direct and indirect fluorescence showed binding of antibodies to nerve structures of the same class and light chain as seen in the M-component. In five cases of IgM M-component, the demyelinating neuropathy was caused by binding of the IgM M-protein and complement C3b to myelin-associated glycoproteins (MAG). In 12 cases with axonal neuropathy, binding of IgG to the connective tissue of the peri- and endoneurium was found in 50% of cases, IgM in five cases, and IgD in one case. None of the patients had central nervous system (CNS) symptoms. The clinical and therapeutic difficulties are discussed; only two patients with an acute course responded to immunosuppression. A marked co-expression of other autoimmune phenomena is interpreted in the light of cross-reactions between the autoantibody and similar tissue autoantigens. 相似文献
9.
10.
Dose-escalation study of intravenous nicardipine in patients with aneurysmal subarachnoid hemorrhage 总被引:3,自引:0,他引:3
E S Flamm H P Adams D W Beck R S Pinto J R Marler M D Walker J C Godersky C M Loftus J Biller D J Boarini 《Journal of neurosurgery》1988,68(3):393-400
A dose-escalation study of the calcium ion entry blocking drug nicardipine was performed using large dose infusions in 67 patients with recent aneurysmal subarachnoid hemorrhage (SAH). A safe, potentially therapeutic dose of the drug was determined. Patients admitted within 7 days of SAH from a documented cerebral aneurysm were entered into the study if no spasm was present on the initial angiogram. Nicardipine was administered as a continuous intravenous infusion throughout the 14-day period after SAH, regardless of the timing of surgery. To determine the safest possible dose, nicardipine was administered at seven dose levels from 0.01 to 0.15 mg/kg/hr. The total daily doses ranged from 27.7 mg to 375.0 mg. A follow-up angiogram was carried out on all 67 patients 7 to 10 days after SAH. Computerized tomography and neurological examinations were used to determine the presence of cerebral infarction. No major adverse effects, unexpected reactions, or permanent sequelae could be attributed to nicardipine. A decline in blood pressure was noted following administration of the drug. This occurred more frequently among patients given the largest dose but did not produce clinical problems or require discontinuation of the drug. Favorable outcomes were noted in 52 patients (78%). Vasospasm was found by arteriography in 31 patients (46%). A dose-related trend was noted: only eight (24%) of 33 patients treated at the highest dose level (approximately 10 mg/hr) developed arteriographic evidence of vasospasm. Symptomatic vasospasm was diagnosed in only two (6%) of 33 patients treated with this dose. Of the 34 patients receiving the lower dose levels, angiographic spasm was observed in 68% and symptomatic vasospasm in 27%. No deaths due to vasospasm occurred. Nicardipine appears to prevent both vasospasm and cerebral ischemia after SAH. A multicenter randomized double-blind trial to test this hypothesis is planned. 相似文献