全文获取类型
收费全文 | 1189篇 |
免费 | 140篇 |
国内免费 | 49篇 |
学科分类
医药卫生 | 1378篇 |
出版年
2024年 | 3篇 |
2023年 | 16篇 |
2022年 | 10篇 |
2021年 | 31篇 |
2020年 | 22篇 |
2019年 | 12篇 |
2018年 | 25篇 |
2017年 | 48篇 |
2016年 | 41篇 |
2015年 | 31篇 |
2014年 | 68篇 |
2013年 | 74篇 |
2012年 | 32篇 |
2011年 | 26篇 |
2010年 | 65篇 |
2009年 | 69篇 |
2008年 | 26篇 |
2007年 | 69篇 |
2006年 | 37篇 |
2005年 | 24篇 |
2004年 | 20篇 |
2003年 | 13篇 |
2002年 | 11篇 |
2001年 | 27篇 |
2000年 | 12篇 |
1999年 | 17篇 |
1998年 | 77篇 |
1997年 | 64篇 |
1996年 | 60篇 |
1995年 | 50篇 |
1994年 | 45篇 |
1993年 | 42篇 |
1992年 | 11篇 |
1991年 | 5篇 |
1990年 | 17篇 |
1989年 | 21篇 |
1988年 | 24篇 |
1987年 | 16篇 |
1986年 | 19篇 |
1985年 | 17篇 |
1984年 | 10篇 |
1983年 | 12篇 |
1982年 | 9篇 |
1981年 | 4篇 |
1980年 | 8篇 |
1979年 | 4篇 |
1978年 | 6篇 |
1977年 | 5篇 |
1976年 | 12篇 |
1975年 | 9篇 |
排序方式: 共有1378条查询结果,搜索用时 15 毫秒
991.
Spinal Cord injury (SCI) is one of the most devastating and demoralizing ailment for both the patient and the medical practitioner. However, with the better understanding of the pathophysiology, better imaging modalities and emphasis on immobilization and rehabilitation has provided a ray of hope to such patients. The initial care aims at immobilization and evacuation by the classical log roll method and focuses on life-saving procedures. Basic imaging should be augmented with an MRI in doubtful cases. Immobilization either external or internal should be followed by early efforts for rehabilitation. The use of steroids during the acute phase has become controversial. The focus of latest studies has shifted to neuroprotective and regenerative agents. 相似文献
992.
SH Hosseini MR Youssefi I Mobedi SM Hosseini BA Zaheri 《Iranian Journal of Parasitology》2011,6(4):105-108
The Asian cheetah is known as Iranian panther. A four years old female cheetah was killed in a road accident by a truck in Abbas Abad (Biarjamand) County around Shahrood City in Semnan Province, central part of Iran. Two days after the accident the carcass of animal was autopsied and only five cestodes were obtained from its intestine. In inspection of other organs no other helminth was observed. Cestod samples were fixed and stained by carmine acid. Characterization of the cestodes using morphological standard key, identified the cestodes as Taenia acinonyxi. 相似文献
993.
994.
995.
Background
Hepatitis C virus (HCV) infection is common in renal transplant (RT) patients. Some of these patients remain anti-HCV negative despite presence of infection and these are identified by a positive HCV-ribonucleic acid (RNA) test.Methods
We studied 404 RT patients for prevalence of HCV-RNA positivity in anti-HCV negative patients. Serum was tested for presence of anti-HCV antibodies using a third generation HCV micro-ELISA (enzyme-linked immunosorbent assay) test, which utilises a combination of HCV structural and nonstructural antigens. The RNA was extracted from patient serum for HCV viral quantification using Quiagen Ql Amp Viral RNA mini extraction kit. The HCV-RNA viral load was performed on Corbet Rotor Gene 3000 thermocycler using Taqman principle.Results
About 308 patients were anti-HCV negative and 96 were anti-HCV positive, resulting in prevalence of overt HCV infection of 23.7%. A total of 130 anti-HCV negative patients tested positive for HCV-RNA making a prevalence of occult HCV infection of 42.2%. There was no significant difference in the rate of overt or occult HCV infection between males and females. Patients with HCV infection (whether overt or occult) had received more number of dialysis sessions (62.5 vs 32.2) and blood transfusions (2.78 vs 1.99) when compared to those without HCV infection (P=0.001). The mean duration on dialysis was also longer (8.15 months vs 4.53 months) in patients with HCV infection (P= 0.0001).Conclusion
A direct test for HCV viraemia is important to accurately determine the epidemiology of HCV infection in RT patients who remain anti-HCV negative despite harbouring active HCV infection. 相似文献996.
997.
998.
999.
Context:
White lesions in the oral cavity may be benign, pre-malignant or malignant. There are no signs and symptoms which can reliably predict whether a leukoplakia will undergo malignant change or not. Many systemic conditions appear initially in the oral cavity and prompt diagnosis and management can help in minimizing disease progression and organ destruction.Aim:
The aim of the paper was to study the clinical and histopathological patterns of white lesions in the oral cavity presented at the study setting and to study the factors associated with the histopathological patterns of the lesions.Settings and Design:
A hospital based cross-sectional study of patients with white lesions in the oral cavity attending the Department of Dermatology and Venereology, Medical College, Thiruvananthapuram was done.Materials and Methods:
After taking a detailed history, microscopic examination of Potassium hydroxide smear and an oral biopsy with histopathologial examination was done.Results:
Out of the 50 patients in the study, clinically the diagnoses made were Lichen planus (32 patients; 64%), Frictional Keratosis (4;8%), Dysplasia (2;4%), Oral Hairy Leukoplakia (1;2%), Pemphigus Vulgaris (2;4%), Cutaneous Lupus Erythematosus (1;2%), Oral Submucous fibrosis (3;6%) and Oral Candidiasis alone (5;10%). Out of the 45 patients who had undergone biopsy, 25 (55.6%) had Lichen planus, 9 (20%) had Frictional Keratosis and mild Dysplasia was found in 4 (8.9%) patients.Conclusion:
The measure of agreement between the clinical and pathological diagnosis was only 32%. Older age, difficulty in opening the mouth, consumption of non-smoked tobacco, site of the lesion (gingival, floor of mouth or lingual vestibule) and presence of tenderness on the lesion were significantly associated with Dysplasia. 相似文献1000.
Ann L. Gruber‐Baldini PhD Edward Marcantonio MD SM Denise Orwig PhD Jay Magaziner PhD MSHyg Michael Terrin MD CM MPH Erik Barr BA Jessica P. Brown PhD Barbara Paris MD Aleksandra Zagorin NP Darren M. Roffey PhD Khwaja Zakriya MD Mary‐Rita Blute RN J. Richard Hebel PhD Jeffrey L. Carson MD 《Journal of the American Geriatrics Society》2013,61(8):1286-1295